Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

17 files changed, 4680 insertions, 0 deletions

diff --git a/drivers/soc/tegra/Kconfig b/drivers/soc/tegra/Kconfig
new file mode 100644
index 000000000..fe4481676
--- /dev/null
+++ b/drivers/soc/tegra/Kconfig
@@ -0,0 +1,134 @@
+if ARCH_TEGRA
+
+# 32-bit ARM SoCs
+if ARM
+
+config ARCH_TEGRA_2x_SOC
+	bool "Enable support for Tegra20 family"
+	select ARCH_NEEDS_CPU_IDLE_COUPLED if SMP
+	select ARM_ERRATA_720789
+	select ARM_ERRATA_754327 if SMP
+	select ARM_ERRATA_764369 if SMP
+	select PINCTRL_TEGRA20
+	select PL310_ERRATA_727915 if CACHE_L2X0
+	select PL310_ERRATA_769419 if CACHE_L2X0
+	select SOC_TEGRA_FLOWCTRL
+	select SOC_TEGRA_PMC
+	select TEGRA_TIMER
+	help
+	  Support for NVIDIA Tegra AP20 and T20 processors, based on the
+	  ARM CortexA9MP CPU and the ARM PL310 L2 cache controller
+
+config ARCH_TEGRA_3x_SOC
+	bool "Enable support for Tegra30 family"
+	select ARM_ERRATA_754322
+	select ARM_ERRATA_764369 if SMP
+	select PINCTRL_TEGRA30
+	select PL310_ERRATA_769419 if CACHE_L2X0
+	select SOC_TEGRA_FLOWCTRL
+	select SOC_TEGRA_PMC
+	select TEGRA_TIMER
+	help
+	  Support for NVIDIA Tegra T30 processor family, based on the
+	  ARM CortexA9MP CPU and the ARM PL310 L2 cache controller
+
+config ARCH_TEGRA_114_SOC
+	bool "Enable support for Tegra114 family"
+	select ARM_ERRATA_798181 if SMP
+	select HAVE_ARM_ARCH_TIMER
+	select PINCTRL_TEGRA114
+	select SOC_TEGRA_FLOWCTRL
+	select SOC_TEGRA_PMC
+	select TEGRA_TIMER
+	help
+	  Support for NVIDIA Tegra T114 processor family, based on the
+	  ARM CortexA15MP CPU
+
+config ARCH_TEGRA_124_SOC
+	bool "Enable support for Tegra124 family"
+	select HAVE_ARM_ARCH_TIMER
+	select PINCTRL_TEGRA124
+	select SOC_TEGRA_FLOWCTRL
+	select SOC_TEGRA_PMC
+	select TEGRA_TIMER
+	help
+	  Support for NVIDIA Tegra T124 processor family, based on the
+	  ARM CortexA15MP CPU
+
+endif
+
+# 64-bit ARM SoCs
+if ARM64
+
+config ARCH_TEGRA_132_SOC
+	bool "NVIDIA Tegra132 SoC"
+	select PINCTRL_TEGRA124
+	select SOC_TEGRA_FLOWCTRL
+	select SOC_TEGRA_PMC
+	help
+	  Enable support for NVIDIA Tegra132 SoC, based on the Denver
+	  ARMv8 CPU.  The Tegra132 SoC is similar to the Tegra124 SoC,
+	  but contains an NVIDIA Denver CPU complex in place of
+	  Tegra124's "4+1" Cortex-A15 CPU complex.
+
+config ARCH_TEGRA_210_SOC
+	bool "NVIDIA Tegra210 SoC"
+	select PINCTRL_TEGRA210
+	select SOC_TEGRA_FLOWCTRL
+	select SOC_TEGRA_PMC
+	help
+	  Enable support for the NVIDIA Tegra210 SoC. Also known as Tegra X1,
+	  the Tegra210 has four Cortex-A57 cores paired with four Cortex-A53
+	  cores in a switched configuration. It features a GPU of the Maxwell
+	  architecture with support for DX11, SM4, OpenGL 4.5, OpenGL ES 3.1
+	  and providing 256 CUDA cores. It supports hardware-accelerated en-
+	  and decoding of various video standards including H.265, H.264 and
+	  VP8 at 4K resolution and up to 60 fps.
+
+	  Besides the multimedia features it also comes with a variety of I/O
+	  controllers, such as GPIO, I2C, SPI, SDHCI, PCIe, SATA and XHCI, to
+	  name only a few.
+
+config ARCH_TEGRA_186_SOC
+	bool "NVIDIA Tegra186 SoC"
+	select MAILBOX
+	select TEGRA_BPMP
+	select TEGRA_HSP_MBOX
+	select TEGRA_IVC
+	select SOC_TEGRA_PMC
+	help
+	  Enable support for the NVIDIA Tegar186 SoC. The Tegra186 features a
+	  combination of Denver and Cortex-A57 CPU cores and a GPU based on
+	  the Pascal architecture. It contains an ADSP with a Cortex-A9 CPU
+	  used for audio processing, hardware video encoders/decoders with
+	  multi-format support, ISP for image capture processing and BPMP for
+	  power management.
+
+config ARCH_TEGRA_194_SOC
+	bool "NVIDIA Tegra194 SoC"
+	select MAILBOX
+	select TEGRA_BPMP
+	select TEGRA_HSP_MBOX
+	select TEGRA_IVC
+	select SOC_TEGRA_PMC
+	help
+	  Enable support for the NVIDIA Tegra194 SoC.
+
+endif
+endif
+
+config SOC_TEGRA_FUSE
+	def_bool y
+	depends on ARCH_TEGRA
+	select SOC_BUS
+
+config SOC_TEGRA_FLOWCTRL
+	bool
+
+config SOC_TEGRA_PMC
+	bool
+
+config SOC_TEGRA_POWERGATE_BPMP
+	def_bool y
+	depends on PM_GENERIC_DOMAINS
+	depends on TEGRA_BPMP
diff --git a/drivers/soc/tegra/Makefile b/drivers/soc/tegra/Makefile
new file mode 100644
index 000000000..902759fe5
--- /dev/null
+++ b/drivers/soc/tegra/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-y += fuse/
+
+obj-y += common.o
+obj-$(CONFIG_SOC_TEGRA_FLOWCTRL) += flowctrl.o
+obj-$(CONFIG_SOC_TEGRA_PMC) += pmc.o
+obj-$(CONFIG_SOC_TEGRA_POWERGATE_BPMP) += powergate-bpmp.o
diff --git a/drivers/soc/tegra/common.c b/drivers/soc/tegra/common.c
new file mode 100644
index 000000000..7bfb154d6
--- /dev/null
+++ b/drivers/soc/tegra/common.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2014 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/of.h>
+
+#include <soc/tegra/common.h>
+
+static const struct of_device_id tegra_machine_match[] = {
+	{ .compatible = "nvidia,tegra20", },
+	{ .compatible = "nvidia,tegra30", },
+	{ .compatible = "nvidia,tegra114", },
+	{ .compatible = "nvidia,tegra124", },
+	{ .compatible = "nvidia,tegra132", },
+	{ .compatible = "nvidia,tegra210", },
+	{ }
+};
+
+bool soc_is_tegra(void)
+{
+	const struct of_device_id *match;
+	struct device_node *root;
+
+	root = of_find_node_by_path("/");
+	if (!root)
+		return false;
+
+	match = of_match_node(tegra_machine_match, root);
+	of_node_put(root);
+
+	return match != NULL;
+}
diff --git a/drivers/soc/tegra/flowctrl.c b/drivers/soc/tegra/flowctrl.c
new file mode 100644
index 000000000..5433cc7a0
--- /dev/null
+++ b/drivers/soc/tegra/flowctrl.c
@@ -0,0 +1,224 @@
+/*
+ * drivers/soc/tegra/flowctrl.c
+ *
+ * Functions and macros to control the flowcontroller
+ *
+ * Copyright (c) 2010-2012, NVIDIA Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/cpumask.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+
+#include <soc/tegra/common.h>
+#include <soc/tegra/flowctrl.h>
+#include <soc/tegra/fuse.h>
+
+static u8 flowctrl_offset_halt_cpu[] = {
+	FLOW_CTRL_HALT_CPU0_EVENTS,
+	FLOW_CTRL_HALT_CPU1_EVENTS,
+	FLOW_CTRL_HALT_CPU1_EVENTS + 8,
+	FLOW_CTRL_HALT_CPU1_EVENTS + 16,
+};
+
+static u8 flowctrl_offset_cpu_csr[] = {
+	FLOW_CTRL_CPU0_CSR,
+	FLOW_CTRL_CPU1_CSR,
+	FLOW_CTRL_CPU1_CSR + 8,
+	FLOW_CTRL_CPU1_CSR + 16,
+};
+
+static void __iomem *tegra_flowctrl_base;
+
+static void flowctrl_update(u8 offset, u32 value)
+{
+	if (WARN_ONCE(IS_ERR_OR_NULL(tegra_flowctrl_base),
+		      "Tegra flowctrl not initialised!\n"))
+		return;
+
+	writel(value, tegra_flowctrl_base + offset);
+
+	/* ensure the update has reached the flow controller */
+	wmb();
+	readl_relaxed(tegra_flowctrl_base + offset);
+}
+
+u32 flowctrl_read_cpu_csr(unsigned int cpuid)
+{
+	u8 offset = flowctrl_offset_cpu_csr[cpuid];
+
+	if (WARN_ONCE(IS_ERR_OR_NULL(tegra_flowctrl_base),
+		      "Tegra flowctrl not initialised!\n"))
+		return 0;
+
+	return readl(tegra_flowctrl_base + offset);
+}
+
+void flowctrl_write_cpu_csr(unsigned int cpuid, u32 value)
+{
+	return flowctrl_update(flowctrl_offset_cpu_csr[cpuid], value);
+}
+
+void flowctrl_write_cpu_halt(unsigned int cpuid, u32 value)
+{
+	return flowctrl_update(flowctrl_offset_halt_cpu[cpuid], value);
+}
+
+void flowctrl_cpu_suspend_enter(unsigned int cpuid)
+{
+	unsigned int reg;
+	int i;
+
+	reg = flowctrl_read_cpu_csr(cpuid);
+	switch (tegra_get_chip_id()) {
+	case TEGRA20:
+		/* clear wfe bitmap */
+		reg &= ~TEGRA20_FLOW_CTRL_CSR_WFE_BITMAP;
+		/* clear wfi bitmap */
+		reg &= ~TEGRA20_FLOW_CTRL_CSR_WFI_BITMAP;
+		/* pwr gating on wfe */
+		reg |= TEGRA20_FLOW_CTRL_CSR_WFE_CPU0 << cpuid;
+		break;
+	case TEGRA30:
+	case TEGRA114:
+	case TEGRA124:
+		/* clear wfe bitmap */
+		reg &= ~TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP;
+		/* clear wfi bitmap */
+		reg &= ~TEGRA30_FLOW_CTRL_CSR_WFI_BITMAP;
+		/* pwr gating on wfi */
+		reg |= TEGRA30_FLOW_CTRL_CSR_WFI_CPU0 << cpuid;
+		break;
+	}
+	reg |= FLOW_CTRL_CSR_INTR_FLAG;			/* clear intr flag */
+	reg |= FLOW_CTRL_CSR_EVENT_FLAG;		/* clear event flag */
+	reg |= FLOW_CTRL_CSR_ENABLE;			/* pwr gating */
+	flowctrl_write_cpu_csr(cpuid, reg);
+
+	for (i = 0; i < num_possible_cpus(); i++) {
+		if (i == cpuid)
+			continue;
+		reg = flowctrl_read_cpu_csr(i);
+		reg |= FLOW_CTRL_CSR_EVENT_FLAG;
+		reg |= FLOW_CTRL_CSR_INTR_FLAG;
+		flowctrl_write_cpu_csr(i, reg);
+	}
+}
+
+void flowctrl_cpu_suspend_exit(unsigned int cpuid)
+{
+	unsigned int reg;
+
+	/* Disable powergating via flow controller for CPU0 */
+	reg = flowctrl_read_cpu_csr(cpuid);
+	switch (tegra_get_chip_id()) {
+	case TEGRA20:
+		/* clear wfe bitmap */
+		reg &= ~TEGRA20_FLOW_CTRL_CSR_WFE_BITMAP;
+		/* clear wfi bitmap */
+		reg &= ~TEGRA20_FLOW_CTRL_CSR_WFI_BITMAP;
+		break;
+	case TEGRA30:
+	case TEGRA114:
+	case TEGRA124:
+		/* clear wfe bitmap */
+		reg &= ~TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP;
+		/* clear wfi bitmap */
+		reg &= ~TEGRA30_FLOW_CTRL_CSR_WFI_BITMAP;
+		break;
+	}
+	reg &= ~FLOW_CTRL_CSR_ENABLE;			/* clear enable */
+	reg |= FLOW_CTRL_CSR_INTR_FLAG;			/* clear intr */
+	reg |= FLOW_CTRL_CSR_EVENT_FLAG;		/* clear event */
+	flowctrl_write_cpu_csr(cpuid, reg);
+}
+
+static int tegra_flowctrl_probe(struct platform_device *pdev)
+{
+	void __iomem *base = tegra_flowctrl_base;
+	struct resource *res;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	tegra_flowctrl_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(tegra_flowctrl_base))
+		return PTR_ERR(tegra_flowctrl_base);
+
+	iounmap(base);
+
+	return 0;
+}
+
+static const struct of_device_id tegra_flowctrl_match[] = {
+	{ .compatible = "nvidia,tegra210-flowctrl" },
+	{ .compatible = "nvidia,tegra124-flowctrl" },
+	{ .compatible = "nvidia,tegra114-flowctrl" },
+	{ .compatible = "nvidia,tegra30-flowctrl" },
+	{ .compatible = "nvidia,tegra20-flowctrl" },
+	{ }
+};
+
+static struct platform_driver tegra_flowctrl_driver = {
+	.driver = {
+		.name = "tegra-flowctrl",
+		.suppress_bind_attrs = true,
+		.of_match_table = tegra_flowctrl_match,
+	},
+	.probe = tegra_flowctrl_probe,
+};
+builtin_platform_driver(tegra_flowctrl_driver);
+
+static int __init tegra_flowctrl_init(void)
+{
+	struct resource res;
+	struct device_node *np;
+
+	if (!soc_is_tegra())
+		return 0;
+
+	np = of_find_matching_node(NULL, tegra_flowctrl_match);
+	if (np) {
+		if (of_address_to_resource(np, 0, &res) < 0) {
+			pr_err("failed to get flowctrl register\n");
+			return -ENXIO;
+		}
+		of_node_put(np);
+	} else if (IS_ENABLED(CONFIG_ARM)) {
+		/*
+		 * Hardcoded fallback for 32-bit Tegra
+		 * devices if device tree node is missing.
+		 */
+		res.start = 0x60007000;
+		res.end = 0x60007fff;
+		res.flags = IORESOURCE_MEM;
+	} else {
+		/*
+		 * At this point we're running on a Tegra,
+		 * that doesn't support the flow controller
+		 * (eg. Tegra186), so just return.
+		 */
+		return 0;
+	}
+
+	tegra_flowctrl_base = ioremap_nocache(res.start, resource_size(&res));
+	if (!tegra_flowctrl_base)
+		return -ENXIO;
+
+	return 0;
+}
+early_initcall(tegra_flowctrl_init);
diff --git a/drivers/soc/tegra/fuse/Makefile b/drivers/soc/tegra/fuse/Makefile
new file mode 100644
index 000000000..ea8332cc3
--- /dev/null
+++ b/drivers/soc/tegra/fuse/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-y					+= fuse-tegra.o
+obj-y					+= fuse-tegra30.o
+obj-y					+= tegra-apbmisc.o
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC)		+= fuse-tegra20.o
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC)		+= speedo-tegra20.o
+obj-$(CONFIG_ARCH_TEGRA_3x_SOC)		+= speedo-tegra30.o
+obj-$(CONFIG_ARCH_TEGRA_114_SOC)	+= speedo-tegra114.o
+obj-$(CONFIG_ARCH_TEGRA_124_SOC)	+= speedo-tegra124.o
+obj-$(CONFIG_ARCH_TEGRA_132_SOC)	+= speedo-tegra124.o
+obj-$(CONFIG_ARCH_TEGRA_210_SOC)	+= speedo-tegra210.o
diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c
new file mode 100644
index 000000000..52130ec8c
--- /dev/null
+++ b/drivers/soc/tegra/fuse/fuse-tegra.c
@@ -0,0 +1,378 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/kobject.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+
+#include <soc/tegra/common.h>
+#include <soc/tegra/fuse.h>
+
+#include "fuse.h"
+
+struct tegra_sku_info tegra_sku_info;
+EXPORT_SYMBOL(tegra_sku_info);
+
+static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
+	[TEGRA_REVISION_UNKNOWN] = "unknown",
+	[TEGRA_REVISION_A01]     = "A01",
+	[TEGRA_REVISION_A02]     = "A02",
+	[TEGRA_REVISION_A03]     = "A03",
+	[TEGRA_REVISION_A03p]    = "A03 prime",
+	[TEGRA_REVISION_A04]     = "A04",
+};
+
+static u8 fuse_readb(struct tegra_fuse *fuse, unsigned int offset)
+{
+	u32 val;
+
+	val = fuse->read(fuse, round_down(offset, 4));
+	val >>= (offset % 4) * 8;
+	val &= 0xff;
+
+	return val;
+}
+
+static ssize_t fuse_read(struct file *fd, struct kobject *kobj,
+			 struct bin_attribute *attr, char *buf,
+			 loff_t pos, size_t size)
+{
+	struct device *dev = kobj_to_dev(kobj);
+	struct tegra_fuse *fuse = dev_get_drvdata(dev);
+	int i;
+
+	if (pos < 0 || pos >= attr->size)
+		return 0;
+
+	if (size > attr->size - pos)
+		size = attr->size - pos;
+
+	for (i = 0; i < size; i++)
+		buf[i] = fuse_readb(fuse, pos + i);
+
+	return i;
+}
+
+static struct bin_attribute fuse_bin_attr = {
+	.attr = { .name = "fuse", .mode = S_IRUGO, },
+	.read = fuse_read,
+};
+
+static int tegra_fuse_create_sysfs(struct device *dev, unsigned int size,
+				   const struct tegra_fuse_info *info)
+{
+	fuse_bin_attr.size = size;
+
+	return device_create_bin_file(dev, &fuse_bin_attr);
+}
+
+static const struct of_device_id car_match[] __initconst = {
+	{ .compatible = "nvidia,tegra20-car", },
+	{ .compatible = "nvidia,tegra30-car", },
+	{ .compatible = "nvidia,tegra114-car", },
+	{ .compatible = "nvidia,tegra124-car", },
+	{ .compatible = "nvidia,tegra132-car", },
+	{ .compatible = "nvidia,tegra210-car", },
+	{},
+};
+
+static struct tegra_fuse *fuse = &(struct tegra_fuse) {
+	.base = NULL,
+	.soc = NULL,
+};
+
+static const struct of_device_id tegra_fuse_match[] = {
+#ifdef CONFIG_ARCH_TEGRA_186_SOC
+	{ .compatible = "nvidia,tegra186-efuse", .data = &tegra186_fuse_soc },
+#endif
+#ifdef CONFIG_ARCH_TEGRA_210_SOC
+	{ .compatible = "nvidia,tegra210-efuse", .data = &tegra210_fuse_soc },
+#endif
+#ifdef CONFIG_ARCH_TEGRA_132_SOC
+	{ .compatible = "nvidia,tegra132-efuse", .data = &tegra124_fuse_soc },
+#endif
+#ifdef CONFIG_ARCH_TEGRA_124_SOC
+	{ .compatible = "nvidia,tegra124-efuse", .data = &tegra124_fuse_soc },
+#endif
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+	{ .compatible = "nvidia,tegra114-efuse", .data = &tegra114_fuse_soc },
+#endif
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+	{ .compatible = "nvidia,tegra30-efuse", .data = &tegra30_fuse_soc },
+#endif
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+	{ .compatible = "nvidia,tegra20-efuse", .data = &tegra20_fuse_soc },
+#endif
+	{ /* sentinel */ }
+};
+
+static int tegra_fuse_probe(struct platform_device *pdev)
+{
+	void __iomem *base = fuse->base;
+	struct resource *res;
+	int err;
+
+	/* take over the memory region from the early initialization */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	fuse->phys = res->start;
+	fuse->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(fuse->base)) {
+		err = PTR_ERR(fuse->base);
+		fuse->base = base;
+		return err;
+	}
+
+	fuse->clk = devm_clk_get(&pdev->dev, "fuse");
+	if (IS_ERR(fuse->clk)) {
+		dev_err(&pdev->dev, "failed to get FUSE clock: %ld",
+			PTR_ERR(fuse->clk));
+		fuse->base = base;
+		return PTR_ERR(fuse->clk);
+	}
+
+	platform_set_drvdata(pdev, fuse);
+	fuse->dev = &pdev->dev;
+
+	if (fuse->soc->probe) {
+		err = fuse->soc->probe(fuse);
+		if (err < 0) {
+			fuse->base = base;
+			return err;
+		}
+	}
+
+	if (tegra_fuse_create_sysfs(&pdev->dev, fuse->soc->info->size,
+				    fuse->soc->info))
+		return -ENODEV;
+
+	/* release the early I/O memory mapping */
+	iounmap(base);
+
+	return 0;
+}
+
+static struct platform_driver tegra_fuse_driver = {
+	.driver = {
+		.name = "tegra-fuse",
+		.of_match_table = tegra_fuse_match,
+		.suppress_bind_attrs = true,
+	},
+	.probe = tegra_fuse_probe,
+};
+builtin_platform_driver(tegra_fuse_driver);
+
+u32 __init tegra_fuse_read_spare(unsigned int spare)
+{
+	unsigned int offset = fuse->soc->info->spare + spare * 4;
+
+	return fuse->read_early(fuse, offset) & 1;
+}
+
+u32 __init tegra_fuse_read_early(unsigned int offset)
+{
+	return fuse->read_early(fuse, offset);
+}
+
+int tegra_fuse_readl(unsigned long offset, u32 *value)
+{
+	if (!fuse->read)
+		return -EPROBE_DEFER;
+
+	*value = fuse->read(fuse, offset);
+
+	return 0;
+}
+EXPORT_SYMBOL(tegra_fuse_readl);
+
+static void tegra_enable_fuse_clk(void __iomem *base)
+{
+	u32 reg;
+
+	reg = readl_relaxed(base + 0x48);
+	reg |= 1 << 28;
+	writel(reg, base + 0x48);
+
+	/*
+	 * Enable FUSE clock. This needs to be hardcoded because the clock
+	 * subsystem is not active during early boot.
+	 */
+	reg = readl(base + 0x14);
+	reg |= 1 << 7;
+	writel(reg, base + 0x14);
+}
+
+struct device * __init tegra_soc_device_register(void)
+{
+	struct soc_device_attribute *attr;
+	struct soc_device *dev;
+
+	attr = kzalloc(sizeof(*attr), GFP_KERNEL);
+	if (!attr)
+		return NULL;
+
+	attr->family = kasprintf(GFP_KERNEL, "Tegra");
+	attr->revision = kasprintf(GFP_KERNEL, "%d", tegra_sku_info.revision);
+	attr->soc_id = kasprintf(GFP_KERNEL, "%u", tegra_get_chip_id());
+
+	dev = soc_device_register(attr);
+	if (IS_ERR(dev)) {
+		kfree(attr->soc_id);
+		kfree(attr->revision);
+		kfree(attr->family);
+		kfree(attr);
+		return ERR_CAST(dev);
+	}
+
+	return soc_device_to_device(dev);
+}
+
+static int __init tegra_init_fuse(void)
+{
+	const struct of_device_id *match;
+	struct device_node *np;
+	struct resource regs;
+
+	tegra_init_apbmisc();
+
+	np = of_find_matching_node_and_match(NULL, tegra_fuse_match, &match);
+	if (!np) {
+		/*
+		 * Fall back to legacy initialization for 32-bit ARM only. All
+		 * 64-bit ARM device tree files for Tegra are required to have
+		 * a FUSE node.
+		 *
+		 * This is for backwards-compatibility with old device trees
+		 * that didn't contain a FUSE node.
+		 */
+		if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) {
+			u8 chip = tegra_get_chip_id();
+
+			regs.start = 0x7000f800;
+			regs.end = 0x7000fbff;
+			regs.flags = IORESOURCE_MEM;
+
+			switch (chip) {
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+			case TEGRA20:
+				fuse->soc = &tegra20_fuse_soc;
+				break;
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+			case TEGRA30:
+				fuse->soc = &tegra30_fuse_soc;
+				break;
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+			case TEGRA114:
+				fuse->soc = &tegra114_fuse_soc;
+				break;
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_124_SOC
+			case TEGRA124:
+				fuse->soc = &tegra124_fuse_soc;
+				break;
+#endif
+
+			default:
+				pr_warn("Unsupported SoC: %02x\n", chip);
+				break;
+			}
+		} else {
+			/*
+			 * At this point we're not running on Tegra, so play
+			 * nice with multi-platform kernels.
+			 */
+			return 0;
+		}
+	} else {
+		/*
+		 * Extract information from the device tree if we've found a
+		 * matching node.
+		 */
+		if (of_address_to_resource(np, 0, &regs) < 0) {
+			pr_err("failed to get FUSE register\n");
+			return -ENXIO;
+		}
+
+		fuse->soc = match->data;
+	}
+
+	np = of_find_matching_node(NULL, car_match);
+	if (np) {
+		void __iomem *base = of_iomap(np, 0);
+		if (base) {
+			tegra_enable_fuse_clk(base);
+			iounmap(base);
+		} else {
+			pr_err("failed to map clock registers\n");
+			return -ENXIO;
+		}
+	}
+
+	fuse->base = ioremap_nocache(regs.start, resource_size(&regs));
+	if (!fuse->base) {
+		pr_err("failed to map FUSE registers\n");
+		return -ENXIO;
+	}
+
+	fuse->soc->init(fuse);
+
+	pr_info("Tegra Revision: %s SKU: %d CPU Process: %d SoC Process: %d\n",
+		tegra_revision_name[tegra_sku_info.revision],
+		tegra_sku_info.sku_id, tegra_sku_info.cpu_process_id,
+		tegra_sku_info.soc_process_id);
+	pr_debug("Tegra CPU Speedo ID %d, SoC Speedo ID %d\n",
+		 tegra_sku_info.cpu_speedo_id, tegra_sku_info.soc_speedo_id);
+
+
+	return 0;
+}
+early_initcall(tegra_init_fuse);
+
+#ifdef CONFIG_ARM64
+static int __init tegra_init_soc(void)
+{
+	struct device_node *np;
+	struct device *soc;
+
+	/* make sure we're running on Tegra */
+	np = of_find_matching_node(NULL, tegra_fuse_match);
+	if (!np)
+		return 0;
+
+	of_node_put(np);
+
+	soc = tegra_soc_device_register();
+	if (IS_ERR(soc)) {
+		pr_err("failed to register SoC device: %ld\n", PTR_ERR(soc));
+		return PTR_ERR(soc);
+	}
+
+	return 0;
+}
+device_initcall(tegra_init_soc);
+#endif
diff --git a/drivers/soc/tegra/fuse/fuse-tegra20.c b/drivers/soc/tegra/fuse/fuse-tegra20.c
new file mode 100644
index 000000000..49ff017f3
--- /dev/null
+++ b/drivers/soc/tegra/fuse/fuse-tegra20.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Based on drivers/misc/eeprom/sunxi_sid.c
+ */
+
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/kobject.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+
+#include <soc/tegra/fuse.h>
+
+#include "fuse.h"
+
+#define FUSE_BEGIN	0x100
+#define FUSE_UID_LOW	0x08
+#define FUSE_UID_HIGH	0x0c
+
+static u32 tegra20_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset)
+{
+	return readl_relaxed(fuse->base + FUSE_BEGIN + offset);
+}
+
+static void apb_dma_complete(void *args)
+{
+	struct tegra_fuse *fuse = args;
+
+	complete(&fuse->apbdma.wait);
+}
+
+static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset)
+{
+	unsigned long flags = DMA_PREP_INTERRUPT | DMA_CTRL_ACK;
+	struct dma_async_tx_descriptor *dma_desc;
+	unsigned long time_left;
+	u32 value = 0;
+	int err;
+
+	mutex_lock(&fuse->apbdma.lock);
+
+	fuse->apbdma.config.src_addr = fuse->phys + FUSE_BEGIN + offset;
+
+	err = dmaengine_slave_config(fuse->apbdma.chan, &fuse->apbdma.config);
+	if (err)
+		goto out;
+
+	dma_desc = dmaengine_prep_slave_single(fuse->apbdma.chan,
+					       fuse->apbdma.phys,
+					       sizeof(u32), DMA_DEV_TO_MEM,
+					       flags);
+	if (!dma_desc)
+		goto out;
+
+	dma_desc->callback = apb_dma_complete;
+	dma_desc->callback_param = fuse;
+
+	reinit_completion(&fuse->apbdma.wait);
+
+	clk_prepare_enable(fuse->clk);
+
+	dmaengine_submit(dma_desc);
+	dma_async_issue_pending(fuse->apbdma.chan);
+	time_left = wait_for_completion_timeout(&fuse->apbdma.wait,
+						msecs_to_jiffies(50));
+
+	if (WARN(time_left == 0, "apb read dma timed out"))
+		dmaengine_terminate_all(fuse->apbdma.chan);
+	else
+		value = *fuse->apbdma.virt;
+
+	clk_disable_unprepare(fuse->clk);
+
+out:
+	mutex_unlock(&fuse->apbdma.lock);
+	return value;
+}
+
+static bool dma_filter(struct dma_chan *chan, void *filter_param)
+{
+	struct device_node *np = chan->device->dev->of_node;
+
+	return of_device_is_compatible(np, "nvidia,tegra20-apbdma");
+}
+
+static int tegra20_fuse_probe(struct tegra_fuse *fuse)
+{
+	dma_cap_mask_t mask;
+
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_SLAVE, mask);
+
+	fuse->apbdma.chan = __dma_request_channel(&mask, dma_filter, NULL);
+	if (!fuse->apbdma.chan)
+		return -EPROBE_DEFER;
+
+	fuse->apbdma.virt = dma_alloc_coherent(fuse->dev, sizeof(u32),
+					       &fuse->apbdma.phys,
+					       GFP_KERNEL);
+	if (!fuse->apbdma.virt) {
+		dma_release_channel(fuse->apbdma.chan);
+		return -ENOMEM;
+	}
+
+	fuse->apbdma.config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	fuse->apbdma.config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	fuse->apbdma.config.src_maxburst = 1;
+	fuse->apbdma.config.dst_maxburst = 1;
+	fuse->apbdma.config.direction = DMA_DEV_TO_MEM;
+	fuse->apbdma.config.device_fc = false;
+
+	init_completion(&fuse->apbdma.wait);
+	mutex_init(&fuse->apbdma.lock);
+	fuse->read = tegra20_fuse_read;
+
+	return 0;
+}
+
+static const struct tegra_fuse_info tegra20_fuse_info = {
+	.read = tegra20_fuse_read,
+	.size = 0x1f8,
+	.spare = 0x100,
+};
+
+/* Early boot code. This code is called before the devices are created */
+
+static void __init tegra20_fuse_add_randomness(void)
+{
+	u32 randomness[7];
+
+	randomness[0] = tegra_sku_info.sku_id;
+	randomness[1] = tegra_read_straps();
+	randomness[2] = tegra_read_chipid();
+	randomness[3] = tegra_sku_info.cpu_process_id << 16;
+	randomness[3] |= tegra_sku_info.soc_process_id;
+	randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
+	randomness[4] |= tegra_sku_info.soc_speedo_id;
+	randomness[5] = tegra_fuse_read_early(FUSE_UID_LOW);
+	randomness[6] = tegra_fuse_read_early(FUSE_UID_HIGH);
+
+	add_device_randomness(randomness, sizeof(randomness));
+}
+
+static void __init tegra20_fuse_init(struct tegra_fuse *fuse)
+{
+	fuse->read_early = tegra20_fuse_read_early;
+
+	tegra_init_revision();
+	fuse->soc->speedo_init(&tegra_sku_info);
+	tegra20_fuse_add_randomness();
+}
+
+const struct tegra_fuse_soc tegra20_fuse_soc = {
+	.init = tegra20_fuse_init,
+	.speedo_init = tegra20_init_speedo_data,
+	.probe = tegra20_fuse_probe,
+	.info = &tegra20_fuse_info,
+};
diff --git a/drivers/soc/tegra/fuse/fuse-tegra30.c b/drivers/soc/tegra/fuse/fuse-tegra30.c
new file mode 100644
index 000000000..7c47a0ceb
--- /dev/null
+++ b/drivers/soc/tegra/fuse/fuse-tegra30.c
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+
+#include <soc/tegra/fuse.h>
+
+#include "fuse.h"
+
+#define FUSE_BEGIN	0x100
+
+/* Tegra30 and later */
+#define FUSE_VENDOR_CODE	0x100
+#define FUSE_FAB_CODE		0x104
+#define FUSE_LOT_CODE_0		0x108
+#define FUSE_LOT_CODE_1		0x10c
+#define FUSE_WAFER_ID		0x110
+#define FUSE_X_COORDINATE	0x114
+#define FUSE_Y_COORDINATE	0x118
+
+#define FUSE_HAS_REVISION_INFO	BIT(0)
+
+#if defined(CONFIG_ARCH_TEGRA_3x_SOC) || \
+    defined(CONFIG_ARCH_TEGRA_114_SOC) || \
+    defined(CONFIG_ARCH_TEGRA_124_SOC) || \
+    defined(CONFIG_ARCH_TEGRA_132_SOC) || \
+    defined(CONFIG_ARCH_TEGRA_210_SOC) || \
+    defined(CONFIG_ARCH_TEGRA_186_SOC) || \
+    defined(CONFIG_ARCH_TEGRA_194_SOC) || \
+    defined(CONFIG_ARCH_TEGRA_234_SOC)
+static u32 tegra30_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset)
+{
+	if (WARN_ON(!fuse->base))
+		return 0;
+
+	return readl_relaxed(fuse->base + FUSE_BEGIN + offset);
+}
+
+static u32 tegra30_fuse_read(struct tegra_fuse *fuse, unsigned int offset)
+{
+	u32 value;
+	int err;
+
+	err = clk_prepare_enable(fuse->clk);
+	if (err < 0) {
+		dev_err(fuse->dev, "failed to enable FUSE clock: %d\n", err);
+		return 0;
+	}
+
+	value = readl_relaxed(fuse->base + FUSE_BEGIN + offset);
+
+	clk_disable_unprepare(fuse->clk);
+
+	return value;
+}
+
+static void __init tegra30_fuse_add_randomness(void)
+{
+	u32 randomness[12];
+
+	randomness[0] = tegra_sku_info.sku_id;
+	randomness[1] = tegra_read_straps();
+	randomness[2] = tegra_read_chipid();
+	randomness[3] = tegra_sku_info.cpu_process_id << 16;
+	randomness[3] |= tegra_sku_info.soc_process_id;
+	randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
+	randomness[4] |= tegra_sku_info.soc_speedo_id;
+	randomness[5] = tegra_fuse_read_early(FUSE_VENDOR_CODE);
+	randomness[6] = tegra_fuse_read_early(FUSE_FAB_CODE);
+	randomness[7] = tegra_fuse_read_early(FUSE_LOT_CODE_0);
+	randomness[8] = tegra_fuse_read_early(FUSE_LOT_CODE_1);
+	randomness[9] = tegra_fuse_read_early(FUSE_WAFER_ID);
+	randomness[10] = tegra_fuse_read_early(FUSE_X_COORDINATE);
+	randomness[11] = tegra_fuse_read_early(FUSE_Y_COORDINATE);
+
+	add_device_randomness(randomness, sizeof(randomness));
+}
+
+static void __init tegra30_fuse_init(struct tegra_fuse *fuse)
+{
+	fuse->read_early = tegra30_fuse_read_early;
+	fuse->read = tegra30_fuse_read;
+
+	tegra_init_revision();
+
+	if (fuse->soc->speedo_init)
+		fuse->soc->speedo_init(&tegra_sku_info);
+
+	tegra30_fuse_add_randomness();
+}
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+static const struct tegra_fuse_info tegra30_fuse_info = {
+	.read = tegra30_fuse_read,
+	.size = 0x2a4,
+	.spare = 0x144,
+};
+
+const struct tegra_fuse_soc tegra30_fuse_soc = {
+	.init = tegra30_fuse_init,
+	.speedo_init = tegra30_init_speedo_data,
+	.info = &tegra30_fuse_info,
+};
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+static const struct tegra_fuse_info tegra114_fuse_info = {
+	.read = tegra30_fuse_read,
+	.size = 0x2a0,
+	.spare = 0x180,
+};
+
+const struct tegra_fuse_soc tegra114_fuse_soc = {
+	.init = tegra30_fuse_init,
+	.speedo_init = tegra114_init_speedo_data,
+	.info = &tegra114_fuse_info,
+};
+#endif
+
+#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
+static const struct tegra_fuse_info tegra124_fuse_info = {
+	.read = tegra30_fuse_read,
+	.size = 0x300,
+	.spare = 0x200,
+};
+
+const struct tegra_fuse_soc tegra124_fuse_soc = {
+	.init = tegra30_fuse_init,
+	.speedo_init = tegra124_init_speedo_data,
+	.info = &tegra124_fuse_info,
+};
+#endif
+
+#if defined(CONFIG_ARCH_TEGRA_210_SOC)
+static const struct tegra_fuse_info tegra210_fuse_info = {
+	.read = tegra30_fuse_read,
+	.size = 0x300,
+	.spare = 0x280,
+};
+
+const struct tegra_fuse_soc tegra210_fuse_soc = {
+	.init = tegra30_fuse_init,
+	.speedo_init = tegra210_init_speedo_data,
+	.info = &tegra210_fuse_info,
+};
+#endif
+
+#if defined(CONFIG_ARCH_TEGRA_186_SOC)
+static const struct tegra_fuse_info tegra186_fuse_info = {
+	.read = tegra30_fuse_read,
+	.size = 0x300,
+	.spare = 0x280,
+};
+
+const struct tegra_fuse_soc tegra186_fuse_soc = {
+	.init = tegra30_fuse_init,
+	.info = &tegra186_fuse_info,
+};
+#endif
diff --git a/drivers/soc/tegra/fuse/fuse.h b/drivers/soc/tegra/fuse/fuse.h
new file mode 100644
index 000000000..bf489d50e
--- /dev/null
+++ b/drivers/soc/tegra/fuse/fuse.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2010 Google, Inc.
+ * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Author:
+ *	Colin Cross <ccross@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __DRIVERS_MISC_TEGRA_FUSE_H
+#define __DRIVERS_MISC_TEGRA_FUSE_H
+
+#include <linux/dmaengine.h>
+#include <linux/types.h>
+
+struct tegra_fuse;
+
+struct tegra_fuse_info {
+	u32 (*read)(struct tegra_fuse *fuse, unsigned int offset);
+	unsigned int size;
+	unsigned int spare;
+};
+
+struct tegra_fuse_soc {
+	void (*init)(struct tegra_fuse *fuse);
+	void (*speedo_init)(struct tegra_sku_info *info);
+	int (*probe)(struct tegra_fuse *fuse);
+
+	const struct tegra_fuse_info *info;
+};
+
+struct tegra_fuse {
+	struct device *dev;
+	void __iomem *base;
+	phys_addr_t phys;
+	struct clk *clk;
+
+	u32 (*read_early)(struct tegra_fuse *fuse, unsigned int offset);
+	u32 (*read)(struct tegra_fuse *fuse, unsigned int offset);
+	const struct tegra_fuse_soc *soc;
+
+	/* APBDMA on Tegra20 */
+	struct {
+		struct mutex lock;
+		struct completion wait;
+		struct dma_chan *chan;
+		struct dma_slave_config config;
+		dma_addr_t phys;
+		u32 *virt;
+	} apbdma;
+};
+
+void tegra_init_revision(void);
+void tegra_init_apbmisc(void);
+
+u32 __init tegra_fuse_read_spare(unsigned int spare);
+u32 __init tegra_fuse_read_early(unsigned int offset);
+
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+void tegra20_init_speedo_data(struct tegra_sku_info *sku_info);
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+void tegra30_init_speedo_data(struct tegra_sku_info *sku_info);
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+void tegra114_init_speedo_data(struct tegra_sku_info *sku_info);
+#endif
+
+#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
+void tegra124_init_speedo_data(struct tegra_sku_info *sku_info);
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_210_SOC
+void tegra210_init_speedo_data(struct tegra_sku_info *sku_info);
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+extern const struct tegra_fuse_soc tegra20_fuse_soc;
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+extern const struct tegra_fuse_soc tegra30_fuse_soc;
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+extern const struct tegra_fuse_soc tegra114_fuse_soc;
+#endif
+
+#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
+extern const struct tegra_fuse_soc tegra124_fuse_soc;
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_210_SOC
+extern const struct tegra_fuse_soc tegra210_fuse_soc;
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_186_SOC
+extern const struct tegra_fuse_soc tegra186_fuse_soc;
+#endif
+
+#endif
diff --git a/drivers/soc/tegra/fuse/speedo-tegra114.c b/drivers/soc/tegra/fuse/speedo-tegra114.c
new file mode 100644
index 000000000..1ba41ebbb
--- /dev/null
+++ b/drivers/soc/tegra/fuse/speedo-tegra114.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/bug.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+
+#include <soc/tegra/fuse.h>
+
+#include "fuse.h"
+
+#define SOC_PROCESS_CORNERS	2
+#define CPU_PROCESS_CORNERS	2
+
+enum {
+	THRESHOLD_INDEX_0,
+	THRESHOLD_INDEX_1,
+	THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
+	{1123,     UINT_MAX},
+	{0,        UINT_MAX},
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+	{1695,     UINT_MAX},
+	{0,        UINT_MAX},
+};
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
+					 int *threshold)
+{
+	u32 tmp;
+	u32 sku = sku_info->sku_id;
+	enum tegra_revision rev = sku_info->revision;
+
+	switch (sku) {
+	case 0x00:
+	case 0x10:
+	case 0x05:
+	case 0x06:
+		sku_info->cpu_speedo_id = 1;
+		sku_info->soc_speedo_id = 0;
+		*threshold = THRESHOLD_INDEX_0;
+		break;
+
+	case 0x03:
+	case 0x04:
+		sku_info->cpu_speedo_id = 2;
+		sku_info->soc_speedo_id = 1;
+		*threshold = THRESHOLD_INDEX_1;
+		break;
+
+	default:
+		pr_err("Tegra Unknown SKU %d\n", sku);
+		sku_info->cpu_speedo_id = 0;
+		sku_info->soc_speedo_id = 0;
+		*threshold = THRESHOLD_INDEX_0;
+		break;
+	}
+
+	if (rev == TEGRA_REVISION_A01) {
+		tmp = tegra_fuse_read_early(0x270) << 1;
+		tmp |= tegra_fuse_read_early(0x26c);
+		if (!tmp)
+			sku_info->cpu_speedo_id = 0;
+	}
+}
+
+void __init tegra114_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+	u32 cpu_speedo_val;
+	u32 soc_speedo_val;
+	int threshold;
+	int i;
+
+	BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+	BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+
+	rev_sku_to_speedo_ids(sku_info, &threshold);
+
+	cpu_speedo_val = tegra_fuse_read_early(0x12c) + 1024;
+	soc_speedo_val = tegra_fuse_read_early(0x134);
+
+	for (i = 0; i < CPU_PROCESS_CORNERS; i++)
+		if (cpu_speedo_val < cpu_process_speedos[threshold][i])
+			break;
+	sku_info->cpu_process_id = i;
+
+	for (i = 0; i < SOC_PROCESS_CORNERS; i++)
+		if (soc_speedo_val < soc_process_speedos[threshold][i])
+			break;
+	sku_info->soc_process_id = i;
+}
diff --git a/drivers/soc/tegra/fuse/speedo-tegra124.c b/drivers/soc/tegra/fuse/speedo-tegra124.c
new file mode 100644
index 000000000..a63a13410
--- /dev/null
+++ b/drivers/soc/tegra/fuse/speedo-tegra124.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2013-2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/bug.h>
+
+#include <soc/tegra/fuse.h>
+
+#include "fuse.h"
+
+#define CPU_PROCESS_CORNERS	2
+#define GPU_PROCESS_CORNERS	2
+#define SOC_PROCESS_CORNERS	2
+
+#define FUSE_CPU_SPEEDO_0	0x14
+#define FUSE_CPU_SPEEDO_1	0x2c
+#define FUSE_CPU_SPEEDO_2	0x30
+#define FUSE_SOC_SPEEDO_0	0x34
+#define FUSE_SOC_SPEEDO_1	0x38
+#define FUSE_SOC_SPEEDO_2	0x3c
+#define FUSE_CPU_IDDQ		0x18
+#define FUSE_SOC_IDDQ		0x40
+#define FUSE_GPU_IDDQ		0x128
+#define FUSE_FT_REV		0x28
+
+enum {
+	THRESHOLD_INDEX_0,
+	THRESHOLD_INDEX_1,
+	THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+	{2190,	UINT_MAX},
+	{0,	UINT_MAX},
+};
+
+static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = {
+	{1965,	UINT_MAX},
+	{0,	UINT_MAX},
+};
+
+static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
+	{2101,	UINT_MAX},
+	{0,	UINT_MAX},
+};
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
+					 int *threshold)
+{
+	int sku = sku_info->sku_id;
+
+	/* Assign to default */
+	sku_info->cpu_speedo_id = 0;
+	sku_info->soc_speedo_id = 0;
+	sku_info->gpu_speedo_id = 0;
+	*threshold = THRESHOLD_INDEX_0;
+
+	switch (sku) {
+	case 0x00: /* Eng sku */
+	case 0x0F:
+	case 0x23:
+		/* Using the default */
+		break;
+	case 0x83:
+		sku_info->cpu_speedo_id = 2;
+		break;
+
+	case 0x1F:
+	case 0x87:
+	case 0x27:
+		sku_info->cpu_speedo_id = 2;
+		sku_info->soc_speedo_id = 0;
+		sku_info->gpu_speedo_id = 1;
+		*threshold = THRESHOLD_INDEX_0;
+		break;
+	case 0x81:
+	case 0x21:
+	case 0x07:
+		sku_info->cpu_speedo_id = 1;
+		sku_info->soc_speedo_id = 1;
+		sku_info->gpu_speedo_id = 1;
+		*threshold = THRESHOLD_INDEX_1;
+		break;
+	case 0x49:
+	case 0x4A:
+	case 0x48:
+		sku_info->cpu_speedo_id = 4;
+		sku_info->soc_speedo_id = 2;
+		sku_info->gpu_speedo_id = 3;
+		*threshold = THRESHOLD_INDEX_1;
+		break;
+	default:
+		pr_err("Tegra Unknown SKU %d\n", sku);
+		/* Using the default for the error case */
+		break;
+	}
+}
+
+void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+	int i, threshold, cpu_speedo_0_value, soc_speedo_0_value;
+	int cpu_iddq_value, gpu_iddq_value, soc_iddq_value;
+
+	BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+	BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+	BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+
+	cpu_speedo_0_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_0);
+
+	/* GPU Speedo is stored in CPU_SPEEDO_2 */
+	sku_info->gpu_speedo_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2);
+
+	soc_speedo_0_value = tegra_fuse_read_early(FUSE_SOC_SPEEDO_0);
+
+	cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ);
+	soc_iddq_value = tegra_fuse_read_early(FUSE_SOC_IDDQ);
+	gpu_iddq_value = tegra_fuse_read_early(FUSE_GPU_IDDQ);
+
+	sku_info->cpu_speedo_value = cpu_speedo_0_value;
+
+	if (sku_info->cpu_speedo_value == 0) {
+		pr_warn("Tegra Warning: Speedo value not fused.\n");
+		WARN_ON(1);
+		return;
+	}
+
+	rev_sku_to_speedo_ids(sku_info, &threshold);
+
+	sku_info->cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ);
+
+	for (i = 0; i < GPU_PROCESS_CORNERS; i++)
+		if (sku_info->gpu_speedo_value <
+			gpu_process_speedos[threshold][i])
+			break;
+	sku_info->gpu_process_id = i;
+
+	for (i = 0; i < CPU_PROCESS_CORNERS; i++)
+		if (sku_info->cpu_speedo_value <
+			cpu_process_speedos[threshold][i])
+				break;
+	sku_info->cpu_process_id = i;
+
+	for (i = 0; i < SOC_PROCESS_CORNERS; i++)
+		if (soc_speedo_0_value <
+			soc_process_speedos[threshold][i])
+			break;
+	sku_info->soc_process_id = i;
+
+	pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n",
+		 sku_info->gpu_speedo_id, sku_info->gpu_speedo_value);
+}
diff --git a/drivers/soc/tegra/fuse/speedo-tegra20.c b/drivers/soc/tegra/fuse/speedo-tegra20.c
new file mode 100644
index 000000000..5f7818bf6
--- /dev/null
+++ b/drivers/soc/tegra/fuse/speedo-tegra20.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2012-2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/bug.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+
+#include <soc/tegra/fuse.h>
+
+#include "fuse.h"
+
+#define CPU_SPEEDO_LSBIT		20
+#define CPU_SPEEDO_MSBIT		29
+#define CPU_SPEEDO_REDUND_LSBIT		30
+#define CPU_SPEEDO_REDUND_MSBIT		39
+#define CPU_SPEEDO_REDUND_OFFS	(CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT)
+
+#define SOC_SPEEDO_LSBIT		40
+#define SOC_SPEEDO_MSBIT		47
+#define SOC_SPEEDO_REDUND_LSBIT		48
+#define SOC_SPEEDO_REDUND_MSBIT		55
+#define SOC_SPEEDO_REDUND_OFFS	(SOC_SPEEDO_REDUND_MSBIT - SOC_SPEEDO_MSBIT)
+
+#define SPEEDO_MULT			4
+
+#define PROCESS_CORNERS_NUM		4
+
+#define SPEEDO_ID_SELECT_0(rev)		((rev) <= 2)
+#define SPEEDO_ID_SELECT_1(sku)		\
+	(((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \
+	 ((sku) != 27) && ((sku) != 28))
+
+enum {
+	SPEEDO_ID_0,
+	SPEEDO_ID_1,
+	SPEEDO_ID_2,
+	SPEEDO_ID_COUNT,
+};
+
+static const u32 __initconst cpu_process_speedos[][PROCESS_CORNERS_NUM] = {
+	{315, 366, 420, UINT_MAX},
+	{303, 368, 419, UINT_MAX},
+	{316, 331, 383, UINT_MAX},
+};
+
+static const u32 __initconst soc_process_speedos[][PROCESS_CORNERS_NUM] = {
+	{165, 195, 224, UINT_MAX},
+	{165, 195, 224, UINT_MAX},
+	{165, 195, 224, UINT_MAX},
+};
+
+void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+	u32 reg;
+	u32 val;
+	int i;
+
+	BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT);
+	BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) != SPEEDO_ID_COUNT);
+
+	if (SPEEDO_ID_SELECT_0(sku_info->revision))
+		sku_info->soc_speedo_id = SPEEDO_ID_0;
+	else if (SPEEDO_ID_SELECT_1(sku_info->sku_id))
+		sku_info->soc_speedo_id = SPEEDO_ID_1;
+	else
+		sku_info->soc_speedo_id = SPEEDO_ID_2;
+
+	val = 0;
+	for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) {
+		reg = tegra_fuse_read_spare(i) |
+			tegra_fuse_read_spare(i + CPU_SPEEDO_REDUND_OFFS);
+		val = (val << 1) | (reg & 0x1);
+	}
+	val = val * SPEEDO_MULT;
+	pr_debug("Tegra CPU speedo value %u\n", val);
+
+	for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
+		if (val <= cpu_process_speedos[sku_info->soc_speedo_id][i])
+			break;
+	}
+	sku_info->cpu_process_id = i;
+
+	val = 0;
+	for (i = SOC_SPEEDO_MSBIT; i >= SOC_SPEEDO_LSBIT; i--) {
+		reg = tegra_fuse_read_spare(i) |
+			tegra_fuse_read_spare(i + SOC_SPEEDO_REDUND_OFFS);
+		val = (val << 1) | (reg & 0x1);
+	}
+	val = val * SPEEDO_MULT;
+	pr_debug("Core speedo value %u\n", val);
+
+	for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
+		if (val <= soc_process_speedos[sku_info->soc_speedo_id][i])
+			break;
+	}
+	sku_info->soc_process_id = i;
+}
diff --git a/drivers/soc/tegra/fuse/speedo-tegra210.c b/drivers/soc/tegra/fuse/speedo-tegra210.c
new file mode 100644
index 000000000..4403b8956
--- /dev/null
+++ b/drivers/soc/tegra/fuse/speedo-tegra210.c
@@ -0,0 +1,184 @@
+/*
+ * Copyright (c) 2013-2015, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/bug.h>
+
+#include <soc/tegra/fuse.h>
+
+#include "fuse.h"
+
+#define CPU_PROCESS_CORNERS	2
+#define GPU_PROCESS_CORNERS	2
+#define SOC_PROCESS_CORNERS	3
+
+#define FUSE_CPU_SPEEDO_0	0x014
+#define FUSE_CPU_SPEEDO_1	0x02c
+#define FUSE_CPU_SPEEDO_2	0x030
+#define FUSE_SOC_SPEEDO_0	0x034
+#define FUSE_SOC_SPEEDO_1	0x038
+#define FUSE_SOC_SPEEDO_2	0x03c
+#define FUSE_CPU_IDDQ		0x018
+#define FUSE_SOC_IDDQ		0x040
+#define FUSE_GPU_IDDQ		0x128
+#define FUSE_FT_REV		0x028
+
+enum {
+	THRESHOLD_INDEX_0,
+	THRESHOLD_INDEX_1,
+	THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+	{ 2119, UINT_MAX },
+	{ 2119, UINT_MAX },
+};
+
+static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = {
+	{ UINT_MAX, UINT_MAX },
+	{ UINT_MAX, UINT_MAX },
+};
+
+static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
+	{ 1950, 2100, UINT_MAX },
+	{ 1950, 2100, UINT_MAX },
+};
+
+static u8 __init get_speedo_revision(void)
+{
+	return tegra_fuse_read_spare(4) << 2 |
+	       tegra_fuse_read_spare(3) << 1 |
+	       tegra_fuse_read_spare(2) << 0;
+}
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
+					 u8 speedo_rev, int *threshold)
+{
+	int sku = sku_info->sku_id;
+
+	/* Assign to default */
+	sku_info->cpu_speedo_id = 0;
+	sku_info->soc_speedo_id = 0;
+	sku_info->gpu_speedo_id = 0;
+	*threshold = THRESHOLD_INDEX_0;
+
+	switch (sku) {
+	case 0x00: /* Engineering SKU */
+	case 0x01: /* Engineering SKU */
+	case 0x07:
+	case 0x17:
+	case 0x27:
+		if (speedo_rev >= 2)
+			sku_info->gpu_speedo_id = 1;
+		break;
+
+	case 0x13:
+		if (speedo_rev >= 2)
+			sku_info->gpu_speedo_id = 1;
+
+		sku_info->cpu_speedo_id = 1;
+		break;
+
+	default:
+		pr_err("Tegra210: unknown SKU %#04x\n", sku);
+		/* Using the default for the error case */
+		break;
+	}
+}
+
+static int get_process_id(int value, const u32 *speedos, unsigned int num)
+{
+	unsigned int i;
+
+	for (i = 0; i < num; i++)
+		if (value < speedos[i])
+			return i;
+
+	return -EINVAL;
+}
+
+void __init tegra210_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+	int cpu_speedo[3], soc_speedo[3], cpu_iddq, gpu_iddq, soc_iddq;
+	unsigned int index;
+	u8 speedo_revision;
+
+	BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+	BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+	BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+
+	/* Read speedo/IDDQ fuses */
+	cpu_speedo[0] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_0);
+	cpu_speedo[1] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_1);
+	cpu_speedo[2] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2);
+
+	soc_speedo[0] = tegra_fuse_read_early(FUSE_SOC_SPEEDO_0);
+	soc_speedo[1] = tegra_fuse_read_early(FUSE_SOC_SPEEDO_1);
+	soc_speedo[2] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2);
+
+	cpu_iddq = tegra_fuse_read_early(FUSE_CPU_IDDQ) * 4;
+	soc_iddq = tegra_fuse_read_early(FUSE_SOC_IDDQ) * 4;
+	gpu_iddq = tegra_fuse_read_early(FUSE_GPU_IDDQ) * 5;
+
+	/*
+	 * Determine CPU, GPU and SoC speedo values depending on speedo fusing
+	 * revision. Note that GPU speedo value is fused in CPU_SPEEDO_2.
+	 */
+	speedo_revision = get_speedo_revision();
+	pr_info("Speedo Revision %u\n", speedo_revision);
+
+	if (speedo_revision >= 3) {
+		sku_info->cpu_speedo_value = cpu_speedo[0];
+		sku_info->gpu_speedo_value = cpu_speedo[2];
+		sku_info->soc_speedo_value = soc_speedo[0];
+	} else if (speedo_revision == 2) {
+		sku_info->cpu_speedo_value = (-1938 + (1095 * cpu_speedo[0] / 100)) / 10;
+		sku_info->gpu_speedo_value = (-1662 + (1082 * cpu_speedo[2] / 100)) / 10;
+		sku_info->soc_speedo_value = ( -705 + (1037 * soc_speedo[0] / 100)) / 10;
+	} else {
+		sku_info->cpu_speedo_value = 2100;
+		sku_info->gpu_speedo_value = cpu_speedo[2] - 75;
+		sku_info->soc_speedo_value = 1900;
+	}
+
+	if ((sku_info->cpu_speedo_value <= 0) ||
+	    (sku_info->gpu_speedo_value <= 0) ||
+	    (sku_info->soc_speedo_value <= 0)) {
+		WARN(1, "speedo value not fused\n");
+		return;
+	}
+
+	rev_sku_to_speedo_ids(sku_info, speedo_revision, &index);
+
+	sku_info->gpu_process_id = get_process_id(sku_info->gpu_speedo_value,
+						  gpu_process_speedos[index],
+						  GPU_PROCESS_CORNERS);
+
+	sku_info->cpu_process_id = get_process_id(sku_info->cpu_speedo_value,
+						  cpu_process_speedos[index],
+						  CPU_PROCESS_CORNERS);
+
+	sku_info->soc_process_id = get_process_id(sku_info->soc_speedo_value,
+						  soc_process_speedos[index],
+						  SOC_PROCESS_CORNERS);
+
+	pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n",
+		 sku_info->gpu_speedo_id, sku_info->gpu_speedo_value);
+}
diff --git a/drivers/soc/tegra/fuse/speedo-tegra30.c b/drivers/soc/tegra/fuse/speedo-tegra30.c
new file mode 100644
index 000000000..9b010b3ef
--- /dev/null
+++ b/drivers/soc/tegra/fuse/speedo-tegra30.c
@@ -0,0 +1,288 @@
+/*
+ * Copyright (c) 2012-2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/bug.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+
+#include <soc/tegra/fuse.h>
+
+#include "fuse.h"
+
+#define SOC_PROCESS_CORNERS	1
+#define CPU_PROCESS_CORNERS	6
+
+#define FUSE_SPEEDO_CALIB_0	0x14
+#define FUSE_PACKAGE_INFO	0XFC
+#define FUSE_TEST_PROG_VER	0X28
+
+#define G_SPEEDO_BIT_MINUS1	58
+#define G_SPEEDO_BIT_MINUS1_R	59
+#define G_SPEEDO_BIT_MINUS2	60
+#define G_SPEEDO_BIT_MINUS2_R	61
+#define LP_SPEEDO_BIT_MINUS1	62
+#define LP_SPEEDO_BIT_MINUS1_R	63
+#define LP_SPEEDO_BIT_MINUS2	64
+#define LP_SPEEDO_BIT_MINUS2_R	65
+
+enum {
+	THRESHOLD_INDEX_0,
+	THRESHOLD_INDEX_1,
+	THRESHOLD_INDEX_2,
+	THRESHOLD_INDEX_3,
+	THRESHOLD_INDEX_4,
+	THRESHOLD_INDEX_5,
+	THRESHOLD_INDEX_6,
+	THRESHOLD_INDEX_7,
+	THRESHOLD_INDEX_8,
+	THRESHOLD_INDEX_9,
+	THRESHOLD_INDEX_10,
+	THRESHOLD_INDEX_11,
+	THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
+	{180},
+	{170},
+	{195},
+	{180},
+	{168},
+	{192},
+	{180},
+	{170},
+	{195},
+	{180},
+	{180},
+	{180},
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+	{306, 338, 360, 376, UINT_MAX},
+	{295, 336, 358, 375, UINT_MAX},
+	{325, 325, 358, 375, UINT_MAX},
+	{325, 325, 358, 375, UINT_MAX},
+	{292, 324, 348, 364, UINT_MAX},
+	{324, 324, 348, 364, UINT_MAX},
+	{324, 324, 348, 364, UINT_MAX},
+	{295, 336, 358, 375, UINT_MAX},
+	{358, 358, 358, 358, 397, UINT_MAX},
+	{364, 364, 364, 364, 397, UINT_MAX},
+	{295, 336, 358, 375, 391, UINT_MAX},
+	{295, 336, 358, 375, 391, UINT_MAX},
+};
+
+static int threshold_index __initdata;
+
+static void __init fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
+{
+	u32 reg;
+	int ate_ver;
+	int bit_minus1;
+	int bit_minus2;
+
+	reg = tegra_fuse_read_early(FUSE_SPEEDO_CALIB_0);
+
+	*speedo_lp = (reg & 0xFFFF) * 4;
+	*speedo_g = ((reg >> 16) & 0xFFFF) * 4;
+
+	ate_ver = tegra_fuse_read_early(FUSE_TEST_PROG_VER);
+	pr_debug("Tegra ATE prog ver %d.%d\n", ate_ver/10, ate_ver%10);
+
+	if (ate_ver >= 26) {
+		bit_minus1 = tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS1);
+		bit_minus1 |= tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS1_R);
+		bit_minus2 = tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS2);
+		bit_minus2 |= tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS2_R);
+		*speedo_lp |= (bit_minus1 << 1) | bit_minus2;
+
+		bit_minus1 = tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS1);
+		bit_minus1 |= tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS1_R);
+		bit_minus2 = tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS2);
+		bit_minus2 |= tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS2_R);
+		*speedo_g |= (bit_minus1 << 1) | bit_minus2;
+	} else {
+		*speedo_lp |= 0x3;
+		*speedo_g |= 0x3;
+	}
+}
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info)
+{
+	int package_id = tegra_fuse_read_early(FUSE_PACKAGE_INFO) & 0x0F;
+
+	switch (sku_info->revision) {
+	case TEGRA_REVISION_A01:
+		sku_info->cpu_speedo_id = 0;
+		sku_info->soc_speedo_id = 0;
+		threshold_index = THRESHOLD_INDEX_0;
+		break;
+	case TEGRA_REVISION_A02:
+	case TEGRA_REVISION_A03:
+		switch (sku_info->sku_id) {
+		case 0x87:
+		case 0x82:
+			sku_info->cpu_speedo_id = 1;
+			sku_info->soc_speedo_id = 1;
+			threshold_index = THRESHOLD_INDEX_1;
+			break;
+		case 0x81:
+			switch (package_id) {
+			case 1:
+				sku_info->cpu_speedo_id = 2;
+				sku_info->soc_speedo_id = 2;
+				threshold_index = THRESHOLD_INDEX_2;
+				break;
+			case 2:
+				sku_info->cpu_speedo_id = 4;
+				sku_info->soc_speedo_id = 1;
+				threshold_index = THRESHOLD_INDEX_7;
+				break;
+			default:
+				pr_err("Tegra Unknown pkg %d\n", package_id);
+				break;
+			}
+			break;
+		case 0x80:
+			switch (package_id) {
+			case 1:
+				sku_info->cpu_speedo_id = 5;
+				sku_info->soc_speedo_id = 2;
+				threshold_index = THRESHOLD_INDEX_8;
+				break;
+			case 2:
+				sku_info->cpu_speedo_id = 6;
+				sku_info->soc_speedo_id = 2;
+				threshold_index = THRESHOLD_INDEX_9;
+				break;
+			default:
+				pr_err("Tegra Unknown pkg %d\n", package_id);
+				break;
+			}
+			break;
+		case 0x83:
+			switch (package_id) {
+			case 1:
+				sku_info->cpu_speedo_id = 7;
+				sku_info->soc_speedo_id = 1;
+				threshold_index = THRESHOLD_INDEX_10;
+				break;
+			case 2:
+				sku_info->cpu_speedo_id = 3;
+				sku_info->soc_speedo_id = 2;
+				threshold_index = THRESHOLD_INDEX_3;
+				break;
+			default:
+				pr_err("Tegra Unknown pkg %d\n", package_id);
+				break;
+			}
+			break;
+		case 0x8F:
+			sku_info->cpu_speedo_id = 8;
+			sku_info->soc_speedo_id = 1;
+			threshold_index = THRESHOLD_INDEX_11;
+			break;
+		case 0x08:
+			sku_info->cpu_speedo_id = 1;
+			sku_info->soc_speedo_id = 1;
+			threshold_index = THRESHOLD_INDEX_4;
+			break;
+		case 0x02:
+			sku_info->cpu_speedo_id = 2;
+			sku_info->soc_speedo_id = 2;
+			threshold_index = THRESHOLD_INDEX_5;
+			break;
+		case 0x04:
+			sku_info->cpu_speedo_id = 3;
+			sku_info->soc_speedo_id = 2;
+			threshold_index = THRESHOLD_INDEX_6;
+			break;
+		case 0:
+			switch (package_id) {
+			case 1:
+				sku_info->cpu_speedo_id = 2;
+				sku_info->soc_speedo_id = 2;
+				threshold_index = THRESHOLD_INDEX_2;
+				break;
+			case 2:
+				sku_info->cpu_speedo_id = 3;
+				sku_info->soc_speedo_id = 2;
+				threshold_index = THRESHOLD_INDEX_3;
+				break;
+			default:
+				pr_err("Tegra Unknown pkg %d\n", package_id);
+				break;
+			}
+			break;
+		default:
+			pr_warn("Tegra Unknown SKU %d\n", sku_info->sku_id);
+			sku_info->cpu_speedo_id = 0;
+			sku_info->soc_speedo_id = 0;
+			threshold_index = THRESHOLD_INDEX_0;
+			break;
+		}
+		break;
+	default:
+		pr_warn("Tegra Unknown chip rev %d\n", sku_info->revision);
+		sku_info->cpu_speedo_id = 0;
+		sku_info->soc_speedo_id = 0;
+		threshold_index = THRESHOLD_INDEX_0;
+		break;
+	}
+}
+
+void __init tegra30_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+	u32 cpu_speedo_val;
+	u32 soc_speedo_val;
+	int i;
+
+	BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+	BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+
+
+	rev_sku_to_speedo_ids(sku_info);
+	fuse_speedo_calib(&cpu_speedo_val, &soc_speedo_val);
+	pr_debug("Tegra CPU speedo value %u\n", cpu_speedo_val);
+	pr_debug("Tegra Core speedo value %u\n", soc_speedo_val);
+
+	for (i = 0; i < CPU_PROCESS_CORNERS; i++) {
+		if (cpu_speedo_val < cpu_process_speedos[threshold_index][i])
+			break;
+	}
+	sku_info->cpu_process_id = i - 1;
+
+	if (sku_info->cpu_process_id == -1) {
+		pr_warn("Tegra CPU speedo value %3d out of range",
+			 cpu_speedo_val);
+		sku_info->cpu_process_id = 0;
+		sku_info->cpu_speedo_id = 1;
+	}
+
+	for (i = 0; i < SOC_PROCESS_CORNERS; i++) {
+		if (soc_speedo_val < soc_process_speedos[threshold_index][i])
+			break;
+	}
+	sku_info->soc_process_id = i - 1;
+
+	if (sku_info->soc_process_id == -1) {
+		pr_warn("Tegra SoC speedo value %3d out of range",
+			soc_speedo_val);
+		sku_info->soc_process_id = 0;
+		sku_info->soc_speedo_id = 1;
+	}
+}
diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c
new file mode 100644
index 000000000..d1cbb0fe1
--- /dev/null
+++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c
@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+
+#include <soc/tegra/fuse.h>
+#include <soc/tegra/common.h>
+
+#include "fuse.h"
+
+#define FUSE_SKU_INFO	0x10
+
+#define PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT	4
+#define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_LONG	\
+	(0xf << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT)
+#define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_SHORT	\
+	(0x3 << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT)
+
+static void __iomem *apbmisc_base;
+static void __iomem *strapping_base;
+static bool long_ram_code;
+
+u32 tegra_read_chipid(void)
+{
+	if (!apbmisc_base) {
+		WARN(1, "Tegra Chip ID not yet available\n");
+		return 0;
+	}
+
+	return readl_relaxed(apbmisc_base + 4);
+}
+
+u8 tegra_get_chip_id(void)
+{
+	return (tegra_read_chipid() >> 8) & 0xff;
+}
+
+u32 tegra_read_straps(void)
+{
+	if (strapping_base)
+		return readl_relaxed(strapping_base);
+	else
+		return 0;
+}
+
+u32 tegra_read_ram_code(void)
+{
+	u32 straps = tegra_read_straps();
+
+	if (long_ram_code)
+		straps &= PMC_STRAPPING_OPT_A_RAM_CODE_MASK_LONG;
+	else
+		straps &= PMC_STRAPPING_OPT_A_RAM_CODE_MASK_SHORT;
+
+	return straps >> PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT;
+}
+
+static const struct of_device_id apbmisc_match[] __initconst = {
+	{ .compatible = "nvidia,tegra20-apbmisc", },
+	{ .compatible = "nvidia,tegra186-misc", },
+	{},
+};
+
+void __init tegra_init_revision(void)
+{
+	u32 id, chip_id, minor_rev;
+	int rev;
+
+	id = tegra_read_chipid();
+	chip_id = (id >> 8) & 0xff;
+	minor_rev = (id >> 16) & 0xf;
+
+	switch (minor_rev) {
+	case 1:
+		rev = TEGRA_REVISION_A01;
+		break;
+	case 2:
+		rev = TEGRA_REVISION_A02;
+		break;
+	case 3:
+		if (chip_id == TEGRA20 && (tegra_fuse_read_spare(18) ||
+					   tegra_fuse_read_spare(19)))
+			rev = TEGRA_REVISION_A03p;
+		else
+			rev = TEGRA_REVISION_A03;
+		break;
+	case 4:
+		rev = TEGRA_REVISION_A04;
+		break;
+	default:
+		rev = TEGRA_REVISION_UNKNOWN;
+	}
+
+	tegra_sku_info.revision = rev;
+
+	tegra_sku_info.sku_id = tegra_fuse_read_early(FUSE_SKU_INFO);
+}
+
+void __init tegra_init_apbmisc(void)
+{
+	struct resource apbmisc, straps;
+	struct device_node *np;
+
+	np = of_find_matching_node(NULL, apbmisc_match);
+	if (!np) {
+		/*
+		 * Fall back to legacy initialization for 32-bit ARM only. All
+		 * 64-bit ARM device tree files for Tegra are required to have
+		 * an APBMISC node.
+		 *
+		 * This is for backwards-compatibility with old device trees
+		 * that didn't contain an APBMISC node.
+		 */
+		if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) {
+			/* APBMISC registers (chip revision, ...) */
+			apbmisc.start = 0x70000800;
+			apbmisc.end = 0x70000863;
+			apbmisc.flags = IORESOURCE_MEM;
+
+			/* strapping options */
+			if (of_machine_is_compatible("nvidia,tegra124")) {
+				straps.start = 0x7000e864;
+				straps.end = 0x7000e867;
+			} else {
+				straps.start = 0x70000008;
+				straps.end = 0x7000000b;
+			}
+
+			straps.flags = IORESOURCE_MEM;
+
+			pr_warn("Using APBMISC region %pR\n", &apbmisc);
+			pr_warn("Using strapping options registers %pR\n",
+				&straps);
+		} else {
+			/*
+			 * At this point we're not running on Tegra, so play
+			 * nice with multi-platform kernels.
+			 */
+			return;
+		}
+	} else {
+		/*
+		 * Extract information from the device tree if we've found a
+		 * matching node.
+		 */
+		if (of_address_to_resource(np, 0, &apbmisc) < 0) {
+			pr_err("failed to get APBMISC registers\n");
+			return;
+		}
+
+		if (of_address_to_resource(np, 1, &straps) < 0) {
+			pr_err("failed to get strapping options registers\n");
+			return;
+		}
+	}
+
+	apbmisc_base = ioremap_nocache(apbmisc.start, resource_size(&apbmisc));
+	if (!apbmisc_base)
+		pr_err("failed to map APBMISC registers\n");
+
+	strapping_base = ioremap_nocache(straps.start, resource_size(&straps));
+	if (!strapping_base)
+		pr_err("failed to map strapping options registers\n");
+
+	long_ram_code = of_property_read_bool(np, "nvidia,long-ram-code");
+}
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
new file mode 100644
index 000000000..c1880f88a
--- /dev/null
+++ b/drivers/soc/tegra/pmc.c
@@ -0,0 +1,2005 @@
+/*
+ * drivers/soc/tegra/pmc.c
+ *
+ * Copyright (c) 2010 Google, Inc
+ *
+ * Author:
+ *	Colin Cross <ccross@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#define pr_fmt(fmt) "tegra-pmc: " fmt
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/clk/tegra.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_clk.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/reboot.h>
+#include <linux/reset.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include <soc/tegra/common.h>
+#include <soc/tegra/fuse.h>
+#include <soc/tegra/pmc.h>
+
+#define PMC_CNTRL			0x0
+#define  PMC_CNTRL_INTR_POLARITY	BIT(17) /* inverts INTR polarity */
+#define  PMC_CNTRL_CPU_PWRREQ_OE	BIT(16) /* CPU pwr req enable */
+#define  PMC_CNTRL_CPU_PWRREQ_POLARITY	BIT(15) /* CPU pwr req polarity */
+#define  PMC_CNTRL_SIDE_EFFECT_LP0	BIT(14) /* LP0 when CPU pwr gated */
+#define  PMC_CNTRL_SYSCLK_OE		BIT(11) /* system clock enable */
+#define  PMC_CNTRL_SYSCLK_POLARITY	BIT(10) /* sys clk polarity */
+#define  PMC_CNTRL_MAIN_RST		BIT(4)
+
+#define DPD_SAMPLE			0x020
+#define  DPD_SAMPLE_ENABLE		BIT(0)
+#define  DPD_SAMPLE_DISABLE		(0 << 0)
+
+#define PWRGATE_TOGGLE			0x30
+#define  PWRGATE_TOGGLE_START		BIT(8)
+
+#define REMOVE_CLAMPING			0x34
+
+#define PWRGATE_STATUS			0x38
+
+#define PMC_IMPL_E_33V_PWR		0x40
+
+#define PMC_PWR_DET			0x48
+
+#define PMC_SCRATCH0_MODE_RECOVERY	BIT(31)
+#define PMC_SCRATCH0_MODE_BOOTLOADER	BIT(30)
+#define PMC_SCRATCH0_MODE_RCM		BIT(1)
+#define PMC_SCRATCH0_MODE_MASK		(PMC_SCRATCH0_MODE_RECOVERY | \
+					 PMC_SCRATCH0_MODE_BOOTLOADER | \
+					 PMC_SCRATCH0_MODE_RCM)
+
+#define PMC_CPUPWRGOOD_TIMER		0xc8
+#define PMC_CPUPWROFF_TIMER		0xcc
+
+#define PMC_PWR_DET_VALUE		0xe4
+
+#define PMC_SCRATCH41			0x140
+
+#define PMC_SENSOR_CTRL			0x1b0
+#define  PMC_SENSOR_CTRL_SCRATCH_WRITE	BIT(2)
+#define  PMC_SENSOR_CTRL_ENABLE_RST	BIT(1)
+
+#define PMC_RST_STATUS			0x1b4
+#define  PMC_RST_STATUS_POR		0
+#define  PMC_RST_STATUS_WATCHDOG	1
+#define  PMC_RST_STATUS_SENSOR		2
+#define  PMC_RST_STATUS_SW_MAIN		3
+#define  PMC_RST_STATUS_LP0		4
+#define  PMC_RST_STATUS_AOTAG		5
+
+#define IO_DPD_REQ			0x1b8
+#define  IO_DPD_REQ_CODE_IDLE		(0U << 30)
+#define  IO_DPD_REQ_CODE_OFF		(1U << 30)
+#define  IO_DPD_REQ_CODE_ON		(2U << 30)
+#define  IO_DPD_REQ_CODE_MASK		(3U << 30)
+
+#define IO_DPD_STATUS			0x1bc
+#define IO_DPD2_REQ			0x1c0
+#define IO_DPD2_STATUS			0x1c4
+#define SEL_DPD_TIM			0x1c8
+
+#define PMC_SCRATCH54			0x258
+#define  PMC_SCRATCH54_DATA_SHIFT	8
+#define  PMC_SCRATCH54_ADDR_SHIFT	0
+
+#define PMC_SCRATCH55			0x25c
+#define  PMC_SCRATCH55_RESET_TEGRA	BIT(31)
+#define  PMC_SCRATCH55_CNTRL_ID_SHIFT	27
+#define  PMC_SCRATCH55_PINMUX_SHIFT	24
+#define  PMC_SCRATCH55_16BITOP		BIT(15)
+#define  PMC_SCRATCH55_CHECKSUM_SHIFT	16
+#define  PMC_SCRATCH55_I2CSLV1_SHIFT	0
+
+#define GPU_RG_CNTRL			0x2d4
+
+/* Tegra186 and later */
+#define WAKE_AOWAKE_CTRL 0x4f4
+#define  WAKE_AOWAKE_CTRL_INTR_POLARITY BIT(0)
+
+struct tegra_powergate {
+	struct generic_pm_domain genpd;
+	struct tegra_pmc *pmc;
+	unsigned int id;
+	struct clk **clks;
+	unsigned int num_clks;
+	struct reset_control *reset;
+};
+
+struct tegra_io_pad_soc {
+	enum tegra_io_pad id;
+	unsigned int dpd;
+	unsigned int voltage;
+};
+
+struct tegra_pmc_regs {
+	unsigned int scratch0;
+	unsigned int dpd_req;
+	unsigned int dpd_status;
+	unsigned int dpd2_req;
+	unsigned int dpd2_status;
+};
+
+struct tegra_pmc_soc {
+	unsigned int num_powergates;
+	const char *const *powergates;
+	unsigned int num_cpu_powergates;
+	const u8 *cpu_powergates;
+
+	bool has_tsense_reset;
+	bool has_gpu_clamps;
+	bool needs_mbist_war;
+	bool has_impl_33v_pwr;
+
+	const struct tegra_io_pad_soc *io_pads;
+	unsigned int num_io_pads;
+
+	const struct tegra_pmc_regs *regs;
+	void (*init)(struct tegra_pmc *pmc);
+	void (*setup_irq_polarity)(struct tegra_pmc *pmc,
+				   struct device_node *np,
+				   bool invert);
+};
+
+/**
+ * struct tegra_pmc - NVIDIA Tegra PMC
+ * @dev: pointer to PMC device structure
+ * @base: pointer to I/O remapped register region
+ * @clk: pointer to pclk clock
+ * @soc: pointer to SoC data structure
+ * @debugfs: pointer to debugfs entry
+ * @rate: currently configured rate of pclk
+ * @suspend_mode: lowest suspend mode available
+ * @cpu_good_time: CPU power good time (in microseconds)
+ * @cpu_off_time: CPU power off time (in microsecends)
+ * @core_osc_time: core power good OSC time (in microseconds)
+ * @core_pmu_time: core power good PMU time (in microseconds)
+ * @core_off_time: core power off time (in microseconds)
+ * @corereq_high: core power request is active-high
+ * @sysclkreq_high: system clock request is active-high
+ * @combined_req: combined power request for CPU & core
+ * @cpu_pwr_good_en: CPU power good signal is enabled
+ * @lp0_vec_phys: physical base address of the LP0 warm boot code
+ * @lp0_vec_size: size of the LP0 warm boot code
+ * @powergates_available: Bitmap of available power gates
+ * @powergates_lock: mutex for power gate register access
+ */
+struct tegra_pmc {
+	struct device *dev;
+	void __iomem *base;
+	void __iomem *wake;
+	void __iomem *aotag;
+	void __iomem *scratch;
+	struct clk *clk;
+	struct dentry *debugfs;
+
+	const struct tegra_pmc_soc *soc;
+
+	unsigned long rate;
+
+	enum tegra_suspend_mode suspend_mode;
+	u32 cpu_good_time;
+	u32 cpu_off_time;
+	u32 core_osc_time;
+	u32 core_pmu_time;
+	u32 core_off_time;
+	bool corereq_high;
+	bool sysclkreq_high;
+	bool combined_req;
+	bool cpu_pwr_good_en;
+	u32 lp0_vec_phys;
+	u32 lp0_vec_size;
+	DECLARE_BITMAP(powergates_available, TEGRA_POWERGATE_MAX);
+
+	struct mutex powergates_lock;
+};
+
+static struct tegra_pmc *pmc = &(struct tegra_pmc) {
+	.base = NULL,
+	.suspend_mode = TEGRA_SUSPEND_NONE,
+};
+
+static inline struct tegra_powergate *
+to_powergate(struct generic_pm_domain *domain)
+{
+	return container_of(domain, struct tegra_powergate, genpd);
+}
+
+static u32 tegra_pmc_readl(unsigned long offset)
+{
+	return readl(pmc->base + offset);
+}
+
+static void tegra_pmc_writel(u32 value, unsigned long offset)
+{
+	writel(value, pmc->base + offset);
+}
+
+static inline bool tegra_powergate_state(int id)
+{
+	if (id == TEGRA_POWERGATE_3D && pmc->soc->has_gpu_clamps)
+		return (tegra_pmc_readl(GPU_RG_CNTRL) & 0x1) == 0;
+	else
+		return (tegra_pmc_readl(PWRGATE_STATUS) & BIT(id)) != 0;
+}
+
+static inline bool tegra_powergate_is_valid(int id)
+{
+	return (pmc->soc && pmc->soc->powergates[id]);
+}
+
+static inline bool tegra_powergate_is_available(int id)
+{
+	return test_bit(id, pmc->powergates_available);
+}
+
+static int tegra_powergate_lookup(struct tegra_pmc *pmc, const char *name)
+{
+	unsigned int i;
+
+	if (!pmc || !pmc->soc || !name)
+		return -EINVAL;
+
+	for (i = 0; i < pmc->soc->num_powergates; i++) {
+		if (!tegra_powergate_is_valid(i))
+			continue;
+
+		if (!strcmp(name, pmc->soc->powergates[i]))
+			return i;
+	}
+
+	return -ENODEV;
+}
+
+/**
+ * tegra_powergate_set() - set the state of a partition
+ * @id: partition ID
+ * @new_state: new state of the partition
+ */
+static int tegra_powergate_set(unsigned int id, bool new_state)
+{
+	bool status;
+	int err;
+
+	if (id == TEGRA_POWERGATE_3D && pmc->soc->has_gpu_clamps)
+		return -EINVAL;
+
+	mutex_lock(&pmc->powergates_lock);
+
+	if (tegra_powergate_state(id) == new_state) {
+		mutex_unlock(&pmc->powergates_lock);
+		return 0;
+	}
+
+	tegra_pmc_writel(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);
+
+	err = readx_poll_timeout(tegra_powergate_state, id, status,
+				 status == new_state, 10, 100000);
+
+	mutex_unlock(&pmc->powergates_lock);
+
+	return err;
+}
+
+static int __tegra_powergate_remove_clamping(unsigned int id)
+{
+	u32 mask;
+
+	mutex_lock(&pmc->powergates_lock);
+
+	/*
+	 * On Tegra124 and later, the clamps for the GPU are controlled by a
+	 * separate register (with different semantics).
+	 */
+	if (id == TEGRA_POWERGATE_3D) {
+		if (pmc->soc->has_gpu_clamps) {
+			tegra_pmc_writel(0, GPU_RG_CNTRL);
+			goto out;
+		}
+	}
+
+	/*
+	 * Tegra 2 has a bug where PCIE and VDE clamping masks are
+	 * swapped relatively to the partition ids
+	 */
+	if (id == TEGRA_POWERGATE_VDEC)
+		mask = (1 << TEGRA_POWERGATE_PCIE);
+	else if (id == TEGRA_POWERGATE_PCIE)
+		mask = (1 << TEGRA_POWERGATE_VDEC);
+	else
+		mask = (1 << id);
+
+	tegra_pmc_writel(mask, REMOVE_CLAMPING);
+
+out:
+	mutex_unlock(&pmc->powergates_lock);
+
+	return 0;
+}
+
+static void tegra_powergate_disable_clocks(struct tegra_powergate *pg)
+{
+	unsigned int i;
+
+	for (i = 0; i < pg->num_clks; i++)
+		clk_disable_unprepare(pg->clks[i]);
+}
+
+static int tegra_powergate_enable_clocks(struct tegra_powergate *pg)
+{
+	unsigned int i;
+	int err;
+
+	for (i = 0; i < pg->num_clks; i++) {
+		err = clk_prepare_enable(pg->clks[i]);
+		if (err)
+			goto out;
+	}
+
+	return 0;
+
+out:
+	while (i--)
+		clk_disable_unprepare(pg->clks[i]);
+
+	return err;
+}
+
+int __weak tegra210_clk_handle_mbist_war(unsigned int id)
+{
+	return 0;
+}
+
+static int tegra_powergate_power_up(struct tegra_powergate *pg,
+				    bool disable_clocks)
+{
+	int err;
+
+	err = reset_control_assert(pg->reset);
+	if (err)
+		return err;
+
+	usleep_range(10, 20);
+
+	err = tegra_powergate_set(pg->id, true);
+	if (err < 0)
+		return err;
+
+	usleep_range(10, 20);
+
+	err = tegra_powergate_enable_clocks(pg);
+	if (err)
+		goto powergate_off;
+
+	usleep_range(10, 20);
+
+	err = __tegra_powergate_remove_clamping(pg->id);
+	if (err)
+		goto disable_clks;
+
+	usleep_range(10, 20);
+
+	err = reset_control_deassert(pg->reset);
+	if (err)
+		goto disable_clks;
+
+	usleep_range(10, 20);
+
+	if (pg->pmc->soc->needs_mbist_war)
+		err = tegra210_clk_handle_mbist_war(pg->id);
+	if (err)
+		goto disable_clks;
+
+	if (disable_clocks)
+		tegra_powergate_disable_clocks(pg);
+
+	return 0;
+
+disable_clks:
+	tegra_powergate_disable_clocks(pg);
+	usleep_range(10, 20);
+
+powergate_off:
+	tegra_powergate_set(pg->id, false);
+
+	return err;
+}
+
+static int tegra_powergate_power_down(struct tegra_powergate *pg)
+{
+	int err;
+
+	err = tegra_powergate_enable_clocks(pg);
+	if (err)
+		return err;
+
+	usleep_range(10, 20);
+
+	err = reset_control_assert(pg->reset);
+	if (err)
+		goto disable_clks;
+
+	usleep_range(10, 20);
+
+	tegra_powergate_disable_clocks(pg);
+
+	usleep_range(10, 20);
+
+	err = tegra_powergate_set(pg->id, false);
+	if (err)
+		goto assert_resets;
+
+	return 0;
+
+assert_resets:
+	tegra_powergate_enable_clocks(pg);
+	usleep_range(10, 20);
+	reset_control_deassert(pg->reset);
+	usleep_range(10, 20);
+
+disable_clks:
+	tegra_powergate_disable_clocks(pg);
+
+	return err;
+}
+
+static int tegra_genpd_power_on(struct generic_pm_domain *domain)
+{
+	struct tegra_powergate *pg = to_powergate(domain);
+	int err;
+
+	err = tegra_powergate_power_up(pg, true);
+	if (err)
+		pr_err("failed to turn on PM domain %s: %d\n", pg->genpd.name,
+		       err);
+
+	return err;
+}
+
+static int tegra_genpd_power_off(struct generic_pm_domain *domain)
+{
+	struct tegra_powergate *pg = to_powergate(domain);
+	int err;
+
+	err = tegra_powergate_power_down(pg);
+	if (err)
+		pr_err("failed to turn off PM domain %s: %d\n",
+		       pg->genpd.name, err);
+
+	return err;
+}
+
+/**
+ * tegra_powergate_power_on() - power on partition
+ * @id: partition ID
+ */
+int tegra_powergate_power_on(unsigned int id)
+{
+	if (!tegra_powergate_is_available(id))
+		return -EINVAL;
+
+	return tegra_powergate_set(id, true);
+}
+
+/**
+ * tegra_powergate_power_off() - power off partition
+ * @id: partition ID
+ */
+int tegra_powergate_power_off(unsigned int id)
+{
+	if (!tegra_powergate_is_available(id))
+		return -EINVAL;
+
+	return tegra_powergate_set(id, false);
+}
+EXPORT_SYMBOL(tegra_powergate_power_off);
+
+/**
+ * tegra_powergate_is_powered() - check if partition is powered
+ * @id: partition ID
+ */
+int tegra_powergate_is_powered(unsigned int id)
+{
+	if (!tegra_powergate_is_valid(id))
+		return -EINVAL;
+
+	return tegra_powergate_state(id);
+}
+
+/**
+ * tegra_powergate_remove_clamping() - remove power clamps for partition
+ * @id: partition ID
+ */
+int tegra_powergate_remove_clamping(unsigned int id)
+{
+	if (!tegra_powergate_is_available(id))
+		return -EINVAL;
+
+	return __tegra_powergate_remove_clamping(id);
+}
+EXPORT_SYMBOL(tegra_powergate_remove_clamping);
+
+/**
+ * tegra_powergate_sequence_power_up() - power up partition
+ * @id: partition ID
+ * @clk: clock for partition
+ * @rst: reset for partition
+ *
+ * Must be called with clk disabled, and returns with clk enabled.
+ */
+int tegra_powergate_sequence_power_up(unsigned int id, struct clk *clk,
+				      struct reset_control *rst)
+{
+	struct tegra_powergate *pg;
+	int err;
+
+	if (!tegra_powergate_is_available(id))
+		return -EINVAL;
+
+	pg = kzalloc(sizeof(*pg), GFP_KERNEL);
+	if (!pg)
+		return -ENOMEM;
+
+	pg->id = id;
+	pg->clks = &clk;
+	pg->num_clks = 1;
+	pg->reset = rst;
+	pg->pmc = pmc;
+
+	err = tegra_powergate_power_up(pg, false);
+	if (err)
+		pr_err("failed to turn on partition %d: %d\n", id, err);
+
+	kfree(pg);
+
+	return err;
+}
+EXPORT_SYMBOL(tegra_powergate_sequence_power_up);
+
+#ifdef CONFIG_SMP
+/**
+ * tegra_get_cpu_powergate_id() - convert from CPU ID to partition ID
+ * @cpuid: CPU partition ID
+ *
+ * Returns the partition ID corresponding to the CPU partition ID or a
+ * negative error code on failure.
+ */
+static int tegra_get_cpu_powergate_id(unsigned int cpuid)
+{
+	if (pmc->soc && cpuid < pmc->soc->num_cpu_powergates)
+		return pmc->soc->cpu_powergates[cpuid];
+
+	return -EINVAL;
+}
+
+/**
+ * tegra_pmc_cpu_is_powered() - check if CPU partition is powered
+ * @cpuid: CPU partition ID
+ */
+bool tegra_pmc_cpu_is_powered(unsigned int cpuid)
+{
+	int id;
+
+	id = tegra_get_cpu_powergate_id(cpuid);
+	if (id < 0)
+		return false;
+
+	return tegra_powergate_is_powered(id);
+}
+
+/**
+ * tegra_pmc_cpu_power_on() - power on CPU partition
+ * @cpuid: CPU partition ID
+ */
+int tegra_pmc_cpu_power_on(unsigned int cpuid)
+{
+	int id;
+
+	id = tegra_get_cpu_powergate_id(cpuid);
+	if (id < 0)
+		return id;
+
+	return tegra_powergate_set(id, true);
+}
+
+/**
+ * tegra_pmc_cpu_remove_clamping() - remove power clamps for CPU partition
+ * @cpuid: CPU partition ID
+ */
+int tegra_pmc_cpu_remove_clamping(unsigned int cpuid)
+{
+	int id;
+
+	id = tegra_get_cpu_powergate_id(cpuid);
+	if (id < 0)
+		return id;
+
+	return tegra_powergate_remove_clamping(id);
+}
+#endif /* CONFIG_SMP */
+
+static int tegra_pmc_restart_notify(struct notifier_block *this,
+				    unsigned long action, void *data)
+{
+	const char *cmd = data;
+	u32 value;
+
+	value = readl(pmc->scratch + pmc->soc->regs->scratch0);
+	value &= ~PMC_SCRATCH0_MODE_MASK;
+
+	if (cmd) {
+		if (strcmp(cmd, "recovery") == 0)
+			value |= PMC_SCRATCH0_MODE_RECOVERY;
+
+		if (strcmp(cmd, "bootloader") == 0)
+			value |= PMC_SCRATCH0_MODE_BOOTLOADER;
+
+		if (strcmp(cmd, "forced-recovery") == 0)
+			value |= PMC_SCRATCH0_MODE_RCM;
+	}
+
+	writel(value, pmc->scratch + pmc->soc->regs->scratch0);
+
+	/* reset everything but PMC_SCRATCH0 and PMC_RST_STATUS */
+	value = tegra_pmc_readl(PMC_CNTRL);
+	value |= PMC_CNTRL_MAIN_RST;
+	tegra_pmc_writel(value, PMC_CNTRL);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block tegra_pmc_restart_handler = {
+	.notifier_call = tegra_pmc_restart_notify,
+	.priority = 128,
+};
+
+static int powergate_show(struct seq_file *s, void *data)
+{
+	unsigned int i;
+	int status;
+
+	seq_printf(s, " powergate powered\n");
+	seq_printf(s, "------------------\n");
+
+	for (i = 0; i < pmc->soc->num_powergates; i++) {
+		status = tegra_powergate_is_powered(i);
+		if (status < 0)
+			continue;
+
+		seq_printf(s, " %9s %7s\n", pmc->soc->powergates[i],
+			   status ? "yes" : "no");
+	}
+
+	return 0;
+}
+
+static int powergate_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, powergate_show, inode->i_private);
+}
+
+static const struct file_operations powergate_fops = {
+	.open = powergate_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static int tegra_powergate_debugfs_init(void)
+{
+	pmc->debugfs = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
+					   &powergate_fops);
+	if (!pmc->debugfs)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static int tegra_powergate_of_get_clks(struct tegra_powergate *pg,
+				       struct device_node *np)
+{
+	struct clk *clk;
+	unsigned int i, count;
+	int err;
+
+	count = of_clk_get_parent_count(np);
+	if (count == 0)
+		return -ENODEV;
+
+	pg->clks = kcalloc(count, sizeof(clk), GFP_KERNEL);
+	if (!pg->clks)
+		return -ENOMEM;
+
+	for (i = 0; i < count; i++) {
+		pg->clks[i] = of_clk_get(np, i);
+		if (IS_ERR(pg->clks[i])) {
+			err = PTR_ERR(pg->clks[i]);
+			goto err;
+		}
+	}
+
+	pg->num_clks = count;
+
+	return 0;
+
+err:
+	while (i--)
+		clk_put(pg->clks[i]);
+
+	kfree(pg->clks);
+
+	return err;
+}
+
+static int tegra_powergate_of_get_resets(struct tegra_powergate *pg,
+					 struct device_node *np, bool off)
+{
+	int err;
+
+	pg->reset = of_reset_control_array_get_exclusive(np);
+	if (IS_ERR(pg->reset)) {
+		err = PTR_ERR(pg->reset);
+		pr_err("failed to get device resets: %d\n", err);
+		return err;
+	}
+
+	if (off)
+		err = reset_control_assert(pg->reset);
+	else
+		err = reset_control_deassert(pg->reset);
+
+	if (err)
+		reset_control_put(pg->reset);
+
+	return err;
+}
+
+static void tegra_powergate_add(struct tegra_pmc *pmc, struct device_node *np)
+{
+	struct tegra_powergate *pg;
+	int id, err;
+	bool off;
+
+	pg = kzalloc(sizeof(*pg), GFP_KERNEL);
+	if (!pg)
+		return;
+
+	id = tegra_powergate_lookup(pmc, np->name);
+	if (id < 0) {
+		pr_err("powergate lookup failed for %s: %d\n", np->name, id);
+		goto free_mem;
+	}
+
+	/*
+	 * Clear the bit for this powergate so it cannot be managed
+	 * directly via the legacy APIs for controlling powergates.
+	 */
+	clear_bit(id, pmc->powergates_available);
+
+	pg->id = id;
+	pg->genpd.name = np->name;
+	pg->genpd.power_off = tegra_genpd_power_off;
+	pg->genpd.power_on = tegra_genpd_power_on;
+	pg->pmc = pmc;
+
+	off = !tegra_powergate_is_powered(pg->id);
+
+	err = tegra_powergate_of_get_clks(pg, np);
+	if (err < 0) {
+		pr_err("failed to get clocks for %s: %d\n", np->name, err);
+		goto set_available;
+	}
+
+	err = tegra_powergate_of_get_resets(pg, np, off);
+	if (err < 0) {
+		pr_err("failed to get resets for %s: %d\n", np->name, err);
+		goto remove_clks;
+	}
+
+	if (!IS_ENABLED(CONFIG_PM_GENERIC_DOMAINS)) {
+		if (off)
+			WARN_ON(tegra_powergate_power_up(pg, true));
+
+		goto remove_resets;
+	}
+
+	/*
+	 * FIXME: If XHCI is enabled for Tegra, then power-up the XUSB
+	 * host and super-speed partitions. Once the XHCI driver
+	 * manages the partitions itself this code can be removed. Note
+	 * that we don't register these partitions with the genpd core
+	 * to avoid it from powering down the partitions as they appear
+	 * to be unused.
+	 */
+	if (IS_ENABLED(CONFIG_USB_XHCI_TEGRA) &&
+	    (id == TEGRA_POWERGATE_XUSBA || id == TEGRA_POWERGATE_XUSBC)) {
+		if (off)
+			WARN_ON(tegra_powergate_power_up(pg, true));
+
+		goto remove_resets;
+	}
+
+	err = pm_genpd_init(&pg->genpd, NULL, off);
+	if (err < 0) {
+		pr_err("failed to initialise PM domain %s: %d\n", np->name,
+		       err);
+		goto remove_resets;
+	}
+
+	err = of_genpd_add_provider_simple(np, &pg->genpd);
+	if (err < 0) {
+		pr_err("failed to add PM domain provider for %s: %d\n",
+		       np->name, err);
+		goto remove_genpd;
+	}
+
+	pr_debug("added PM domain %s\n", pg->genpd.name);
+
+	return;
+
+remove_genpd:
+	pm_genpd_remove(&pg->genpd);
+
+remove_resets:
+	reset_control_put(pg->reset);
+
+remove_clks:
+	while (pg->num_clks--)
+		clk_put(pg->clks[pg->num_clks]);
+
+	kfree(pg->clks);
+
+set_available:
+	set_bit(id, pmc->powergates_available);
+
+free_mem:
+	kfree(pg);
+}
+
+static void tegra_powergate_init(struct tegra_pmc *pmc,
+				 struct device_node *parent)
+{
+	struct device_node *np, *child;
+	unsigned int i;
+
+	/* Create a bitmap of the available and valid partitions */
+	for (i = 0; i < pmc->soc->num_powergates; i++)
+		if (pmc->soc->powergates[i])
+			set_bit(i, pmc->powergates_available);
+
+	np = of_get_child_by_name(parent, "powergates");
+	if (!np)
+		return;
+
+	for_each_child_of_node(np, child)
+		tegra_powergate_add(pmc, child);
+
+	of_node_put(np);
+}
+
+static const struct tegra_io_pad_soc *
+tegra_io_pad_find(struct tegra_pmc *pmc, enum tegra_io_pad id)
+{
+	unsigned int i;
+
+	for (i = 0; i < pmc->soc->num_io_pads; i++)
+		if (pmc->soc->io_pads[i].id == id)
+			return &pmc->soc->io_pads[i];
+
+	return NULL;
+}
+
+static int tegra_io_pad_prepare(enum tegra_io_pad id, unsigned long *request,
+				unsigned long *status, u32 *mask)
+{
+	const struct tegra_io_pad_soc *pad;
+	unsigned long rate, value;
+
+	pad = tegra_io_pad_find(pmc, id);
+	if (!pad) {
+		pr_err("invalid I/O pad ID %u\n", id);
+		return -ENOENT;
+	}
+
+	if (pad->dpd == UINT_MAX)
+		return -ENOTSUPP;
+
+	*mask = BIT(pad->dpd % 32);
+
+	if (pad->dpd < 32) {
+		*status = pmc->soc->regs->dpd_status;
+		*request = pmc->soc->regs->dpd_req;
+	} else {
+		*status = pmc->soc->regs->dpd2_status;
+		*request = pmc->soc->regs->dpd2_req;
+	}
+
+	if (pmc->clk) {
+		rate = clk_get_rate(pmc->clk);
+		if (!rate) {
+			pr_err("failed to get clock rate\n");
+			return -ENODEV;
+		}
+
+		tegra_pmc_writel(DPD_SAMPLE_ENABLE, DPD_SAMPLE);
+
+		/* must be at least 200 ns, in APB (PCLK) clock cycles */
+		value = DIV_ROUND_UP(1000000000, rate);
+		value = DIV_ROUND_UP(200, value);
+		tegra_pmc_writel(value, SEL_DPD_TIM);
+	}
+
+	return 0;
+}
+
+static int tegra_io_pad_poll(unsigned long offset, u32 mask,
+			     u32 val, unsigned long timeout)
+{
+	u32 value;
+
+	timeout = jiffies + msecs_to_jiffies(timeout);
+
+	while (time_after(timeout, jiffies)) {
+		value = tegra_pmc_readl(offset);
+		if ((value & mask) == val)
+			return 0;
+
+		usleep_range(250, 1000);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static void tegra_io_pad_unprepare(void)
+{
+	if (pmc->clk)
+		tegra_pmc_writel(DPD_SAMPLE_DISABLE, DPD_SAMPLE);
+}
+
+/**
+ * tegra_io_pad_power_enable() - enable power to I/O pad
+ * @id: Tegra I/O pad ID for which to enable power
+ *
+ * Returns: 0 on success or a negative error code on failure.
+ */
+int tegra_io_pad_power_enable(enum tegra_io_pad id)
+{
+	unsigned long request, status;
+	u32 mask;
+	int err;
+
+	mutex_lock(&pmc->powergates_lock);
+
+	err = tegra_io_pad_prepare(id, &request, &status, &mask);
+	if (err < 0) {
+		pr_err("failed to prepare I/O pad: %d\n", err);
+		goto unlock;
+	}
+
+	tegra_pmc_writel(IO_DPD_REQ_CODE_OFF | mask, request);
+
+	err = tegra_io_pad_poll(status, mask, 0, 250);
+	if (err < 0) {
+		pr_err("failed to enable I/O pad: %d\n", err);
+		goto unlock;
+	}
+
+	tegra_io_pad_unprepare();
+
+unlock:
+	mutex_unlock(&pmc->powergates_lock);
+	return err;
+}
+EXPORT_SYMBOL(tegra_io_pad_power_enable);
+
+/**
+ * tegra_io_pad_power_disable() - disable power to I/O pad
+ * @id: Tegra I/O pad ID for which to disable power
+ *
+ * Returns: 0 on success or a negative error code on failure.
+ */
+int tegra_io_pad_power_disable(enum tegra_io_pad id)
+{
+	unsigned long request, status;
+	u32 mask;
+	int err;
+
+	mutex_lock(&pmc->powergates_lock);
+
+	err = tegra_io_pad_prepare(id, &request, &status, &mask);
+	if (err < 0) {
+		pr_err("failed to prepare I/O pad: %d\n", err);
+		goto unlock;
+	}
+
+	tegra_pmc_writel(IO_DPD_REQ_CODE_ON | mask, request);
+
+	err = tegra_io_pad_poll(status, mask, mask, 250);
+	if (err < 0) {
+		pr_err("failed to disable I/O pad: %d\n", err);
+		goto unlock;
+	}
+
+	tegra_io_pad_unprepare();
+
+unlock:
+	mutex_unlock(&pmc->powergates_lock);
+	return err;
+}
+EXPORT_SYMBOL(tegra_io_pad_power_disable);
+
+int tegra_io_pad_set_voltage(enum tegra_io_pad id,
+			     enum tegra_io_pad_voltage voltage)
+{
+	const struct tegra_io_pad_soc *pad;
+	u32 value;
+
+	pad = tegra_io_pad_find(pmc, id);
+	if (!pad)
+		return -ENOENT;
+
+	if (pad->voltage == UINT_MAX)
+		return -ENOTSUPP;
+
+	mutex_lock(&pmc->powergates_lock);
+
+	if (pmc->soc->has_impl_33v_pwr) {
+		value = tegra_pmc_readl(PMC_IMPL_E_33V_PWR);
+
+		if (voltage == TEGRA_IO_PAD_1800000UV)
+			value &= ~BIT(pad->voltage);
+		else
+			value |= BIT(pad->voltage);
+
+		tegra_pmc_writel(value, PMC_IMPL_E_33V_PWR);
+	} else {
+		/* write-enable PMC_PWR_DET_VALUE[pad->voltage] */
+		value = tegra_pmc_readl(PMC_PWR_DET);
+		value |= BIT(pad->voltage);
+		tegra_pmc_writel(value, PMC_PWR_DET);
+
+		/* update I/O voltage */
+		value = tegra_pmc_readl(PMC_PWR_DET_VALUE);
+
+		if (voltage == TEGRA_IO_PAD_1800000UV)
+			value &= ~BIT(pad->voltage);
+		else
+			value |= BIT(pad->voltage);
+
+		tegra_pmc_writel(value, PMC_PWR_DET_VALUE);
+	}
+
+	mutex_unlock(&pmc->powergates_lock);
+
+	usleep_range(100, 250);
+
+	return 0;
+}
+EXPORT_SYMBOL(tegra_io_pad_set_voltage);
+
+int tegra_io_pad_get_voltage(enum tegra_io_pad id)
+{
+	const struct tegra_io_pad_soc *pad;
+	u32 value;
+
+	pad = tegra_io_pad_find(pmc, id);
+	if (!pad)
+		return -ENOENT;
+
+	if (pad->voltage == UINT_MAX)
+		return -ENOTSUPP;
+
+	if (pmc->soc->has_impl_33v_pwr)
+		value = tegra_pmc_readl(PMC_IMPL_E_33V_PWR);
+	else
+		value = tegra_pmc_readl(PMC_PWR_DET_VALUE);
+
+	if ((value & BIT(pad->voltage)) == 0)
+		return TEGRA_IO_PAD_1800000UV;
+
+	return TEGRA_IO_PAD_3300000UV;
+}
+EXPORT_SYMBOL(tegra_io_pad_get_voltage);
+
+/**
+ * tegra_io_rail_power_on() - enable power to I/O rail
+ * @id: Tegra I/O pad ID for which to enable power
+ *
+ * See also: tegra_io_pad_power_enable()
+ */
+int tegra_io_rail_power_on(unsigned int id)
+{
+	return tegra_io_pad_power_enable(id);
+}
+EXPORT_SYMBOL(tegra_io_rail_power_on);
+
+/**
+ * tegra_io_rail_power_off() - disable power to I/O rail
+ * @id: Tegra I/O pad ID for which to disable power
+ *
+ * See also: tegra_io_pad_power_disable()
+ */
+int tegra_io_rail_power_off(unsigned int id)
+{
+	return tegra_io_pad_power_disable(id);
+}
+EXPORT_SYMBOL(tegra_io_rail_power_off);
+
+#ifdef CONFIG_PM_SLEEP
+enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void)
+{
+	return pmc->suspend_mode;
+}
+
+void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode)
+{
+	if (mode < TEGRA_SUSPEND_NONE || mode >= TEGRA_MAX_SUSPEND_MODE)
+		return;
+
+	pmc->suspend_mode = mode;
+}
+
+void tegra_pmc_enter_suspend_mode(enum tegra_suspend_mode mode)
+{
+	unsigned long long rate = 0;
+	u32 value;
+
+	switch (mode) {
+	case TEGRA_SUSPEND_LP1:
+		rate = 32768;
+		break;
+
+	case TEGRA_SUSPEND_LP2:
+		rate = clk_get_rate(pmc->clk);
+		break;
+
+	default:
+		break;
+	}
+
+	if (WARN_ON_ONCE(rate == 0))
+		rate = 100000000;
+
+	if (rate != pmc->rate) {
+		u64 ticks;
+
+		ticks = pmc->cpu_good_time * rate + USEC_PER_SEC - 1;
+		do_div(ticks, USEC_PER_SEC);
+		tegra_pmc_writel(ticks, PMC_CPUPWRGOOD_TIMER);
+
+		ticks = pmc->cpu_off_time * rate + USEC_PER_SEC - 1;
+		do_div(ticks, USEC_PER_SEC);
+		tegra_pmc_writel(ticks, PMC_CPUPWROFF_TIMER);
+
+		wmb();
+
+		pmc->rate = rate;
+	}
+
+	value = tegra_pmc_readl(PMC_CNTRL);
+	value &= ~PMC_CNTRL_SIDE_EFFECT_LP0;
+	value |= PMC_CNTRL_CPU_PWRREQ_OE;
+	tegra_pmc_writel(value, PMC_CNTRL);
+}
+#endif
+
+static int tegra_pmc_parse_dt(struct tegra_pmc *pmc, struct device_node *np)
+{
+	u32 value, values[2];
+
+	if (of_property_read_u32(np, "nvidia,suspend-mode", &value)) {
+	} else {
+		switch (value) {
+		case 0:
+			pmc->suspend_mode = TEGRA_SUSPEND_LP0;
+			break;
+
+		case 1:
+			pmc->suspend_mode = TEGRA_SUSPEND_LP1;
+			break;
+
+		case 2:
+			pmc->suspend_mode = TEGRA_SUSPEND_LP2;
+			break;
+
+		default:
+			pmc->suspend_mode = TEGRA_SUSPEND_NONE;
+			break;
+		}
+	}
+
+	pmc->suspend_mode = tegra_pm_validate_suspend_mode(pmc->suspend_mode);
+
+	if (of_property_read_u32(np, "nvidia,cpu-pwr-good-time", &value))
+		pmc->suspend_mode = TEGRA_SUSPEND_NONE;
+
+	pmc->cpu_good_time = value;
+
+	if (of_property_read_u32(np, "nvidia,cpu-pwr-off-time", &value))
+		pmc->suspend_mode = TEGRA_SUSPEND_NONE;
+
+	pmc->cpu_off_time = value;
+
+	if (of_property_read_u32_array(np, "nvidia,core-pwr-good-time",
+				       values, ARRAY_SIZE(values)))
+		pmc->suspend_mode = TEGRA_SUSPEND_NONE;
+
+	pmc->core_osc_time = values[0];
+	pmc->core_pmu_time = values[1];
+
+	if (of_property_read_u32(np, "nvidia,core-pwr-off-time", &value))
+		pmc->suspend_mode = TEGRA_SUSPEND_NONE;
+
+	pmc->core_off_time = value;
+
+	pmc->corereq_high = of_property_read_bool(np,
+				"nvidia,core-power-req-active-high");
+
+	pmc->sysclkreq_high = of_property_read_bool(np,
+				"nvidia,sys-clock-req-active-high");
+
+	pmc->combined_req = of_property_read_bool(np,
+				"nvidia,combined-power-req");
+
+	pmc->cpu_pwr_good_en = of_property_read_bool(np,
+				"nvidia,cpu-pwr-good-en");
+
+	if (of_property_read_u32_array(np, "nvidia,lp0-vec", values,
+				       ARRAY_SIZE(values)))
+		if (pmc->suspend_mode == TEGRA_SUSPEND_LP0)
+			pmc->suspend_mode = TEGRA_SUSPEND_LP1;
+
+	pmc->lp0_vec_phys = values[0];
+	pmc->lp0_vec_size = values[1];
+
+	return 0;
+}
+
+static void tegra_pmc_init(struct tegra_pmc *pmc)
+{
+	if (pmc->soc->init)
+		pmc->soc->init(pmc);
+}
+
+static void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc)
+{
+	static const char disabled[] = "emergency thermal reset disabled";
+	u32 pmu_addr, ctrl_id, reg_addr, reg_data, pinmux;
+	struct device *dev = pmc->dev;
+	struct device_node *np;
+	u32 value, checksum;
+
+	if (!pmc->soc->has_tsense_reset)
+		return;
+
+	np = of_get_child_by_name(pmc->dev->of_node, "i2c-thermtrip");
+	if (!np) {
+		dev_warn(dev, "i2c-thermtrip node not found, %s.\n", disabled);
+		return;
+	}
+
+	if (of_property_read_u32(np, "nvidia,i2c-controller-id", &ctrl_id)) {
+		dev_err(dev, "I2C controller ID missing, %s.\n", disabled);
+		goto out;
+	}
+
+	if (of_property_read_u32(np, "nvidia,bus-addr", &pmu_addr)) {
+		dev_err(dev, "nvidia,bus-addr missing, %s.\n", disabled);
+		goto out;
+	}
+
+	if (of_property_read_u32(np, "nvidia,reg-addr", &reg_addr)) {
+		dev_err(dev, "nvidia,reg-addr missing, %s.\n", disabled);
+		goto out;
+	}
+
+	if (of_property_read_u32(np, "nvidia,reg-data", &reg_data)) {
+		dev_err(dev, "nvidia,reg-data missing, %s.\n", disabled);
+		goto out;
+	}
+
+	if (of_property_read_u32(np, "nvidia,pinmux-id", &pinmux))
+		pinmux = 0;
+
+	value = tegra_pmc_readl(PMC_SENSOR_CTRL);
+	value |= PMC_SENSOR_CTRL_SCRATCH_WRITE;
+	tegra_pmc_writel(value, PMC_SENSOR_CTRL);
+
+	value = (reg_data << PMC_SCRATCH54_DATA_SHIFT) |
+		(reg_addr << PMC_SCRATCH54_ADDR_SHIFT);
+	tegra_pmc_writel(value, PMC_SCRATCH54);
+
+	value = PMC_SCRATCH55_RESET_TEGRA;
+	value |= ctrl_id << PMC_SCRATCH55_CNTRL_ID_SHIFT;
+	value |= pinmux << PMC_SCRATCH55_PINMUX_SHIFT;
+	value |= pmu_addr << PMC_SCRATCH55_I2CSLV1_SHIFT;
+
+	/*
+	 * Calculate checksum of SCRATCH54, SCRATCH55 fields. Bits 23:16 will
+	 * contain the checksum and are currently zero, so they are not added.
+	 */
+	checksum = reg_addr + reg_data + (value & 0xff) + ((value >> 8) & 0xff)
+		+ ((value >> 24) & 0xff);
+	checksum &= 0xff;
+	checksum = 0x100 - checksum;
+
+	value |= checksum << PMC_SCRATCH55_CHECKSUM_SHIFT;
+
+	tegra_pmc_writel(value, PMC_SCRATCH55);
+
+	value = tegra_pmc_readl(PMC_SENSOR_CTRL);
+	value |= PMC_SENSOR_CTRL_ENABLE_RST;
+	tegra_pmc_writel(value, PMC_SENSOR_CTRL);
+
+	dev_info(pmc->dev, "emergency thermal reset enabled\n");
+
+out:
+	of_node_put(np);
+}
+
+static int tegra_pmc_probe(struct platform_device *pdev)
+{
+	void __iomem *base;
+	struct resource *res;
+	int err;
+
+	/*
+	 * Early initialisation should have configured an initial
+	 * register mapping and setup the soc data pointer. If these
+	 * are not valid then something went badly wrong!
+	 */
+	if (WARN_ON(!pmc->base || !pmc->soc))
+		return -ENODEV;
+
+	err = tegra_pmc_parse_dt(pmc, pdev->dev.of_node);
+	if (err < 0)
+		return err;
+
+	/* take over the memory region from the early initialization */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wake");
+	if (res) {
+		pmc->wake = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(pmc->wake))
+			return PTR_ERR(pmc->wake);
+	} else {
+		pmc->wake = base;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aotag");
+	if (res) {
+		pmc->aotag = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(pmc->aotag))
+			return PTR_ERR(pmc->aotag);
+	} else {
+		pmc->aotag = base;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "scratch");
+	if (res) {
+		pmc->scratch = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(pmc->scratch))
+			return PTR_ERR(pmc->scratch);
+	} else {
+		pmc->scratch = base;
+	}
+
+	pmc->clk = devm_clk_get(&pdev->dev, "pclk");
+	if (IS_ERR(pmc->clk)) {
+		err = PTR_ERR(pmc->clk);
+
+		if (err != -ENOENT) {
+			dev_err(&pdev->dev, "failed to get pclk: %d\n", err);
+			return err;
+		}
+
+		pmc->clk = NULL;
+	}
+
+	pmc->dev = &pdev->dev;
+
+	tegra_pmc_init(pmc);
+
+	tegra_pmc_init_tsense_reset(pmc);
+
+	if (IS_ENABLED(CONFIG_DEBUG_FS)) {
+		err = tegra_powergate_debugfs_init();
+		if (err < 0)
+			return err;
+	}
+
+	err = register_restart_handler(&tegra_pmc_restart_handler);
+	if (err) {
+		debugfs_remove(pmc->debugfs);
+		dev_err(&pdev->dev, "unable to register restart handler, %d\n",
+			err);
+		return err;
+	}
+
+	mutex_lock(&pmc->powergates_lock);
+	iounmap(pmc->base);
+	pmc->base = base;
+	mutex_unlock(&pmc->powergates_lock);
+
+	return 0;
+}
+
+#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
+static int tegra_pmc_suspend(struct device *dev)
+{
+	tegra_pmc_writel(virt_to_phys(tegra_resume), PMC_SCRATCH41);
+
+	return 0;
+}
+
+static int tegra_pmc_resume(struct device *dev)
+{
+	tegra_pmc_writel(0x0, PMC_SCRATCH41);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(tegra_pmc_pm_ops, tegra_pmc_suspend, tegra_pmc_resume);
+
+#endif
+
+static const char * const tegra20_powergates[] = {
+	[TEGRA_POWERGATE_CPU] = "cpu",
+	[TEGRA_POWERGATE_3D] = "3d",
+	[TEGRA_POWERGATE_VENC] = "venc",
+	[TEGRA_POWERGATE_VDEC] = "vdec",
+	[TEGRA_POWERGATE_PCIE] = "pcie",
+	[TEGRA_POWERGATE_L2] = "l2",
+	[TEGRA_POWERGATE_MPE] = "mpe",
+};
+
+static const struct tegra_pmc_regs tegra20_pmc_regs = {
+	.scratch0 = 0x50,
+	.dpd_req = 0x1b8,
+	.dpd_status = 0x1bc,
+	.dpd2_req = 0x1c0,
+	.dpd2_status = 0x1c4,
+};
+
+static void tegra20_pmc_init(struct tegra_pmc *pmc)
+{
+	u32 value;
+
+	/* Always enable CPU power request */
+	value = tegra_pmc_readl(PMC_CNTRL);
+	value |= PMC_CNTRL_CPU_PWRREQ_OE;
+	tegra_pmc_writel(value, PMC_CNTRL);
+
+	value = tegra_pmc_readl(PMC_CNTRL);
+
+	if (pmc->sysclkreq_high)
+		value &= ~PMC_CNTRL_SYSCLK_POLARITY;
+	else
+		value |= PMC_CNTRL_SYSCLK_POLARITY;
+
+	/* configure the output polarity while the request is tristated */
+	tegra_pmc_writel(value, PMC_CNTRL);
+
+	/* now enable the request */
+	value = tegra_pmc_readl(PMC_CNTRL);
+	value |= PMC_CNTRL_SYSCLK_OE;
+	tegra_pmc_writel(value, PMC_CNTRL);
+}
+
+static void tegra20_pmc_setup_irq_polarity(struct tegra_pmc *pmc,
+					   struct device_node *np,
+					   bool invert)
+{
+	u32 value;
+
+	value = tegra_pmc_readl(PMC_CNTRL);
+
+	if (invert)
+		value |= PMC_CNTRL_INTR_POLARITY;
+	else
+		value &= ~PMC_CNTRL_INTR_POLARITY;
+
+	tegra_pmc_writel(value, PMC_CNTRL);
+}
+
+static const struct tegra_pmc_soc tegra20_pmc_soc = {
+	.num_powergates = ARRAY_SIZE(tegra20_powergates),
+	.powergates = tegra20_powergates,
+	.num_cpu_powergates = 0,
+	.cpu_powergates = NULL,
+	.has_tsense_reset = false,
+	.has_gpu_clamps = false,
+	.num_io_pads = 0,
+	.io_pads = NULL,
+	.regs = &tegra20_pmc_regs,
+	.init = tegra20_pmc_init,
+	.setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
+};
+
+static const char * const tegra30_powergates[] = {
+	[TEGRA_POWERGATE_CPU] = "cpu0",
+	[TEGRA_POWERGATE_3D] = "3d0",
+	[TEGRA_POWERGATE_VENC] = "venc",
+	[TEGRA_POWERGATE_VDEC] = "vdec",
+	[TEGRA_POWERGATE_PCIE] = "pcie",
+	[TEGRA_POWERGATE_L2] = "l2",
+	[TEGRA_POWERGATE_MPE] = "mpe",
+	[TEGRA_POWERGATE_HEG] = "heg",
+	[TEGRA_POWERGATE_SATA] = "sata",
+	[TEGRA_POWERGATE_CPU1] = "cpu1",
+	[TEGRA_POWERGATE_CPU2] = "cpu2",
+	[TEGRA_POWERGATE_CPU3] = "cpu3",
+	[TEGRA_POWERGATE_CELP] = "celp",
+	[TEGRA_POWERGATE_3D1] = "3d1",
+};
+
+static const u8 tegra30_cpu_powergates[] = {
+	TEGRA_POWERGATE_CPU,
+	TEGRA_POWERGATE_CPU1,
+	TEGRA_POWERGATE_CPU2,
+	TEGRA_POWERGATE_CPU3,
+};
+
+static const struct tegra_pmc_soc tegra30_pmc_soc = {
+	.num_powergates = ARRAY_SIZE(tegra30_powergates),
+	.powergates = tegra30_powergates,
+	.num_cpu_powergates = ARRAY_SIZE(tegra30_cpu_powergates),
+	.cpu_powergates = tegra30_cpu_powergates,
+	.has_tsense_reset = true,
+	.has_gpu_clamps = false,
+	.has_impl_33v_pwr = false,
+	.num_io_pads = 0,
+	.io_pads = NULL,
+	.regs = &tegra20_pmc_regs,
+	.init = tegra20_pmc_init,
+	.setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
+};
+
+static const char * const tegra114_powergates[] = {
+	[TEGRA_POWERGATE_CPU] = "crail",
+	[TEGRA_POWERGATE_3D] = "3d",
+	[TEGRA_POWERGATE_VENC] = "venc",
+	[TEGRA_POWERGATE_VDEC] = "vdec",
+	[TEGRA_POWERGATE_MPE] = "mpe",
+	[TEGRA_POWERGATE_HEG] = "heg",
+	[TEGRA_POWERGATE_CPU1] = "cpu1",
+	[TEGRA_POWERGATE_CPU2] = "cpu2",
+	[TEGRA_POWERGATE_CPU3] = "cpu3",
+	[TEGRA_POWERGATE_CELP] = "celp",
+	[TEGRA_POWERGATE_CPU0] = "cpu0",
+	[TEGRA_POWERGATE_C0NC] = "c0nc",
+	[TEGRA_POWERGATE_C1NC] = "c1nc",
+	[TEGRA_POWERGATE_DIS] = "dis",
+	[TEGRA_POWERGATE_DISB] = "disb",
+	[TEGRA_POWERGATE_XUSBA] = "xusba",
+	[TEGRA_POWERGATE_XUSBB] = "xusbb",
+	[TEGRA_POWERGATE_XUSBC] = "xusbc",
+};
+
+static const u8 tegra114_cpu_powergates[] = {
+	TEGRA_POWERGATE_CPU0,
+	TEGRA_POWERGATE_CPU1,
+	TEGRA_POWERGATE_CPU2,
+	TEGRA_POWERGATE_CPU3,
+};
+
+static const struct tegra_pmc_soc tegra114_pmc_soc = {
+	.num_powergates = ARRAY_SIZE(tegra114_powergates),
+	.powergates = tegra114_powergates,
+	.num_cpu_powergates = ARRAY_SIZE(tegra114_cpu_powergates),
+	.cpu_powergates = tegra114_cpu_powergates,
+	.has_tsense_reset = true,
+	.has_gpu_clamps = false,
+	.has_impl_33v_pwr = false,
+	.num_io_pads = 0,
+	.io_pads = NULL,
+	.regs = &tegra20_pmc_regs,
+	.init = tegra20_pmc_init,
+	.setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
+};
+
+static const char * const tegra124_powergates[] = {
+	[TEGRA_POWERGATE_CPU] = "crail",
+	[TEGRA_POWERGATE_3D] = "3d",
+	[TEGRA_POWERGATE_VENC] = "venc",
+	[TEGRA_POWERGATE_PCIE] = "pcie",
+	[TEGRA_POWERGATE_VDEC] = "vdec",
+	[TEGRA_POWERGATE_MPE] = "mpe",
+	[TEGRA_POWERGATE_HEG] = "heg",
+	[TEGRA_POWERGATE_SATA] = "sata",
+	[TEGRA_POWERGATE_CPU1] = "cpu1",
+	[TEGRA_POWERGATE_CPU2] = "cpu2",
+	[TEGRA_POWERGATE_CPU3] = "cpu3",
+	[TEGRA_POWERGATE_CELP] = "celp",
+	[TEGRA_POWERGATE_CPU0] = "cpu0",
+	[TEGRA_POWERGATE_C0NC] = "c0nc",
+	[TEGRA_POWERGATE_C1NC] = "c1nc",
+	[TEGRA_POWERGATE_SOR] = "sor",
+	[TEGRA_POWERGATE_DIS] = "dis",
+	[TEGRA_POWERGATE_DISB] = "disb",
+	[TEGRA_POWERGATE_XUSBA] = "xusba",
+	[TEGRA_POWERGATE_XUSBB] = "xusbb",
+	[TEGRA_POWERGATE_XUSBC] = "xusbc",
+	[TEGRA_POWERGATE_VIC] = "vic",
+	[TEGRA_POWERGATE_IRAM] = "iram",
+};
+
+static const u8 tegra124_cpu_powergates[] = {
+	TEGRA_POWERGATE_CPU0,
+	TEGRA_POWERGATE_CPU1,
+	TEGRA_POWERGATE_CPU2,
+	TEGRA_POWERGATE_CPU3,
+};
+
+static const struct tegra_io_pad_soc tegra124_io_pads[] = {
+	{ .id = TEGRA_IO_PAD_AUDIO, .dpd = 17, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_BB, .dpd = 15, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CAM, .dpd = 36, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_COMP, .dpd = 22, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIA, .dpd = 0, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIB, .dpd = 1, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIE, .dpd = 44, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSI, .dpd = 2, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSIB, .dpd = 39, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSIC, .dpd = 40, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSID, .dpd = 41, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_HDMI, .dpd = 28, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_HSIC, .dpd = 19, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_HV, .dpd = 38, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_LVDS, .dpd = 57, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_MIPI_BIAS, .dpd = 3, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_NAND, .dpd = 13, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_BIAS, .dpd = 4, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CLK1, .dpd = 5, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CLK2, .dpd = 6, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CNTRL, .dpd = 32, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_SDMMC1, .dpd = 33, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_SDMMC3, .dpd = 34, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_SDMMC4, .dpd = 35, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_SYS_DDC, .dpd = 58, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_UART, .dpd = 14, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB0, .dpd = 9, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB1, .dpd = 10, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB2, .dpd = 11, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB_BIAS, .dpd = 12, .voltage = UINT_MAX },
+};
+
+static const struct tegra_pmc_soc tegra124_pmc_soc = {
+	.num_powergates = ARRAY_SIZE(tegra124_powergates),
+	.powergates = tegra124_powergates,
+	.num_cpu_powergates = ARRAY_SIZE(tegra124_cpu_powergates),
+	.cpu_powergates = tegra124_cpu_powergates,
+	.has_tsense_reset = true,
+	.has_gpu_clamps = true,
+	.has_impl_33v_pwr = false,
+	.num_io_pads = ARRAY_SIZE(tegra124_io_pads),
+	.io_pads = tegra124_io_pads,
+	.regs = &tegra20_pmc_regs,
+	.init = tegra20_pmc_init,
+	.setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
+};
+
+static const char * const tegra210_powergates[] = {
+	[TEGRA_POWERGATE_CPU] = "crail",
+	[TEGRA_POWERGATE_3D] = "3d",
+	[TEGRA_POWERGATE_VENC] = "venc",
+	[TEGRA_POWERGATE_PCIE] = "pcie",
+	[TEGRA_POWERGATE_MPE] = "mpe",
+	[TEGRA_POWERGATE_SATA] = "sata",
+	[TEGRA_POWERGATE_CPU1] = "cpu1",
+	[TEGRA_POWERGATE_CPU2] = "cpu2",
+	[TEGRA_POWERGATE_CPU3] = "cpu3",
+	[TEGRA_POWERGATE_CPU0] = "cpu0",
+	[TEGRA_POWERGATE_C0NC] = "c0nc",
+	[TEGRA_POWERGATE_SOR] = "sor",
+	[TEGRA_POWERGATE_DIS] = "dis",
+	[TEGRA_POWERGATE_DISB] = "disb",
+	[TEGRA_POWERGATE_XUSBA] = "xusba",
+	[TEGRA_POWERGATE_XUSBB] = "xusbb",
+	[TEGRA_POWERGATE_XUSBC] = "xusbc",
+	[TEGRA_POWERGATE_VIC] = "vic",
+	[TEGRA_POWERGATE_IRAM] = "iram",
+	[TEGRA_POWERGATE_NVDEC] = "nvdec",
+	[TEGRA_POWERGATE_NVJPG] = "nvjpg",
+	[TEGRA_POWERGATE_AUD] = "aud",
+	[TEGRA_POWERGATE_DFD] = "dfd",
+	[TEGRA_POWERGATE_VE2] = "ve2",
+};
+
+static const u8 tegra210_cpu_powergates[] = {
+	TEGRA_POWERGATE_CPU0,
+	TEGRA_POWERGATE_CPU1,
+	TEGRA_POWERGATE_CPU2,
+	TEGRA_POWERGATE_CPU3,
+};
+
+static const struct tegra_io_pad_soc tegra210_io_pads[] = {
+	{ .id = TEGRA_IO_PAD_AUDIO, .dpd = 17, .voltage = 5 },
+	{ .id = TEGRA_IO_PAD_AUDIO_HV, .dpd = 61, .voltage = 18 },
+	{ .id = TEGRA_IO_PAD_CAM, .dpd = 36, .voltage = 10 },
+	{ .id = TEGRA_IO_PAD_CSIA, .dpd = 0, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIB, .dpd = 1, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIC, .dpd = 42, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSID, .dpd = 43, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIE, .dpd = 44, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIF, .dpd = 45, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DBG, .dpd = 25, .voltage = 19 },
+	{ .id = TEGRA_IO_PAD_DEBUG_NONAO, .dpd = 26, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DMIC, .dpd = 50, .voltage = 20 },
+	{ .id = TEGRA_IO_PAD_DP, .dpd = 51, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSI, .dpd = 2, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSIB, .dpd = 39, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSIC, .dpd = 40, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSID, .dpd = 41, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_EMMC, .dpd = 35, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_EMMC2, .dpd = 37, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_GPIO, .dpd = 27, .voltage = 21 },
+	{ .id = TEGRA_IO_PAD_HDMI, .dpd = 28, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_HSIC, .dpd = 19, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_LVDS, .dpd = 57, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_MIPI_BIAS, .dpd = 3, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_BIAS, .dpd = 4, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CLK1, .dpd = 5, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CLK2, .dpd = 6, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CNTRL, .dpd = UINT_MAX, .voltage = 11 },
+	{ .id = TEGRA_IO_PAD_SDMMC1, .dpd = 33, .voltage = 12 },
+	{ .id = TEGRA_IO_PAD_SDMMC3, .dpd = 34, .voltage = 13 },
+	{ .id = TEGRA_IO_PAD_SPI, .dpd = 46, .voltage = 22 },
+	{ .id = TEGRA_IO_PAD_SPI_HV, .dpd = 47, .voltage = 23 },
+	{ .id = TEGRA_IO_PAD_UART, .dpd = 14, .voltage = 2 },
+	{ .id = TEGRA_IO_PAD_USB0, .dpd = 9, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB1, .dpd = 10, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB2, .dpd = 11, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB3, .dpd = 18, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB_BIAS, .dpd = 12, .voltage = UINT_MAX },
+};
+
+static const struct tegra_pmc_soc tegra210_pmc_soc = {
+	.num_powergates = ARRAY_SIZE(tegra210_powergates),
+	.powergates = tegra210_powergates,
+	.num_cpu_powergates = ARRAY_SIZE(tegra210_cpu_powergates),
+	.cpu_powergates = tegra210_cpu_powergates,
+	.has_tsense_reset = true,
+	.has_gpu_clamps = true,
+	.has_impl_33v_pwr = false,
+	.needs_mbist_war = true,
+	.num_io_pads = ARRAY_SIZE(tegra210_io_pads),
+	.io_pads = tegra210_io_pads,
+	.regs = &tegra20_pmc_regs,
+	.init = tegra20_pmc_init,
+	.setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
+};
+
+static const struct tegra_io_pad_soc tegra186_io_pads[] = {
+	{ .id = TEGRA_IO_PAD_CSIA, .dpd = 0, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIB, .dpd = 1, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSI, .dpd = 2, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_MIPI_BIAS, .dpd = 3, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CLK_BIAS, .dpd = 4, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CLK3, .dpd = 5, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CLK2, .dpd = 6, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CLK1, .dpd = 7, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB0, .dpd = 9, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB1, .dpd = 10, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB2, .dpd = 11, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_USB_BIAS, .dpd = 12, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_UART, .dpd = 14, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_AUDIO, .dpd = 17, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_HSIC, .dpd = 19, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DBG, .dpd = 25, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_HDMI_DP0, .dpd = 28, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_HDMI_DP1, .dpd = 29, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_PEX_CNTRL, .dpd = 32, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_SDMMC2_HV, .dpd = 34, .voltage = 5 },
+	{ .id = TEGRA_IO_PAD_SDMMC4, .dpd = 36, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CAM, .dpd = 38, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSIB, .dpd = 40, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSIC, .dpd = 41, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DSID, .dpd = 42, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIC, .dpd = 43, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSID, .dpd = 44, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIE, .dpd = 45, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_CSIF, .dpd = 46, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_SPI, .dpd = 47, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_UFS, .dpd = 49, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_DMIC_HV, .dpd = 52, .voltage = 2 },
+	{ .id = TEGRA_IO_PAD_EDP, .dpd = 53, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_SDMMC1_HV, .dpd = 55, .voltage = 4 },
+	{ .id = TEGRA_IO_PAD_SDMMC3_HV, .dpd = 56, .voltage = 6 },
+	{ .id = TEGRA_IO_PAD_CONN, .dpd = 60, .voltage = UINT_MAX },
+	{ .id = TEGRA_IO_PAD_AUDIO_HV, .dpd = 61, .voltage = 1 },
+	{ .id = TEGRA_IO_PAD_AO_HV, .dpd = UINT_MAX, .voltage = 0 },
+};
+
+static const struct tegra_pmc_regs tegra186_pmc_regs = {
+	.scratch0 = 0x2000,
+	.dpd_req = 0x74,
+	.dpd_status = 0x78,
+	.dpd2_req = 0x7c,
+	.dpd2_status = 0x80,
+};
+
+static void tegra186_pmc_setup_irq_polarity(struct tegra_pmc *pmc,
+					    struct device_node *np,
+					    bool invert)
+{
+	struct resource regs;
+	void __iomem *wake;
+	u32 value;
+	int index;
+
+	index = of_property_match_string(np, "reg-names", "wake");
+	if (index < 0) {
+		pr_err("failed to find PMC wake registers\n");
+		return;
+	}
+
+	of_address_to_resource(np, index, &regs);
+
+	wake = ioremap_nocache(regs.start, resource_size(&regs));
+	if (!wake) {
+		pr_err("failed to map PMC wake registers\n");
+		return;
+	}
+
+	value = readl(wake + WAKE_AOWAKE_CTRL);
+
+	if (invert)
+		value |= WAKE_AOWAKE_CTRL_INTR_POLARITY;
+	else
+		value &= ~WAKE_AOWAKE_CTRL_INTR_POLARITY;
+
+	writel(value, wake + WAKE_AOWAKE_CTRL);
+
+	iounmap(wake);
+}
+
+static const struct tegra_pmc_soc tegra186_pmc_soc = {
+	.num_powergates = 0,
+	.powergates = NULL,
+	.num_cpu_powergates = 0,
+	.cpu_powergates = NULL,
+	.has_tsense_reset = false,
+	.has_gpu_clamps = false,
+	.has_impl_33v_pwr = true,
+	.num_io_pads = ARRAY_SIZE(tegra186_io_pads),
+	.io_pads = tegra186_io_pads,
+	.regs = &tegra186_pmc_regs,
+	.init = NULL,
+	.setup_irq_polarity = tegra186_pmc_setup_irq_polarity,
+};
+
+static const struct of_device_id tegra_pmc_match[] = {
+	{ .compatible = "nvidia,tegra194-pmc", .data = &tegra186_pmc_soc },
+	{ .compatible = "nvidia,tegra186-pmc", .data = &tegra186_pmc_soc },
+	{ .compatible = "nvidia,tegra210-pmc", .data = &tegra210_pmc_soc },
+	{ .compatible = "nvidia,tegra132-pmc", .data = &tegra124_pmc_soc },
+	{ .compatible = "nvidia,tegra124-pmc", .data = &tegra124_pmc_soc },
+	{ .compatible = "nvidia,tegra114-pmc", .data = &tegra114_pmc_soc },
+	{ .compatible = "nvidia,tegra30-pmc", .data = &tegra30_pmc_soc },
+	{ .compatible = "nvidia,tegra20-pmc", .data = &tegra20_pmc_soc },
+	{ }
+};
+
+static struct platform_driver tegra_pmc_driver = {
+	.driver = {
+		.name = "tegra-pmc",
+		.suppress_bind_attrs = true,
+		.of_match_table = tegra_pmc_match,
+#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
+		.pm = &tegra_pmc_pm_ops,
+#endif
+	},
+	.probe = tegra_pmc_probe,
+};
+builtin_platform_driver(tegra_pmc_driver);
+
+/*
+ * Early initialization to allow access to registers in the very early boot
+ * process.
+ */
+static int __init tegra_pmc_early_init(void)
+{
+	const struct of_device_id *match;
+	struct device_node *np;
+	struct resource regs;
+	bool invert;
+
+	mutex_init(&pmc->powergates_lock);
+
+	np = of_find_matching_node_and_match(NULL, tegra_pmc_match, &match);
+	if (!np) {
+		/*
+		 * Fall back to legacy initialization for 32-bit ARM only. All
+		 * 64-bit ARM device tree files for Tegra are required to have
+		 * a PMC node.
+		 *
+		 * This is for backwards-compatibility with old device trees
+		 * that didn't contain a PMC node. Note that in this case the
+		 * SoC data can't be matched and therefore powergating is
+		 * disabled.
+		 */
+		if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) {
+			pr_warn("DT node not found, powergating disabled\n");
+
+			regs.start = 0x7000e400;
+			regs.end = 0x7000e7ff;
+			regs.flags = IORESOURCE_MEM;
+
+			pr_warn("Using memory region %pR\n", &regs);
+		} else {
+			/*
+			 * At this point we're not running on Tegra, so play
+			 * nice with multi-platform kernels.
+			 */
+			return 0;
+		}
+	} else {
+		/*
+		 * Extract information from the device tree if we've found a
+		 * matching node.
+		 */
+		if (of_address_to_resource(np, 0, &regs) < 0) {
+			pr_err("failed to get PMC registers\n");
+			of_node_put(np);
+			return -ENXIO;
+		}
+	}
+
+	pmc->base = ioremap_nocache(regs.start, resource_size(&regs));
+	if (!pmc->base) {
+		pr_err("failed to map PMC registers\n");
+		of_node_put(np);
+		return -ENXIO;
+	}
+
+	if (np) {
+		pmc->soc = match->data;
+
+		tegra_powergate_init(pmc, np);
+
+		/*
+		 * Invert the interrupt polarity if a PMC device tree node
+		 * exists and contains the nvidia,invert-interrupt property.
+		 */
+		invert = of_property_read_bool(np, "nvidia,invert-interrupt");
+
+		pmc->soc->setup_irq_polarity(pmc, np, invert);
+
+		of_node_put(np);
+	}
+
+	return 0;
+}
+early_initcall(tegra_pmc_early_init);
diff --git a/drivers/soc/tegra/powergate-bpmp.c b/drivers/soc/tegra/powergate-bpmp.c
new file mode 100644
index 000000000..82c7e27cd
--- /dev/null
+++ b/drivers/soc/tegra/powergate-bpmp.c
@@ -0,0 +1,370 @@
+/*
+ * Copyright (c) 2016-2017, NVIDIA CORPORATION. All rights reserved
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+
+#include <soc/tegra/bpmp.h>
+#include <soc/tegra/bpmp-abi.h>
+
+struct tegra_powergate_info {
+	unsigned int id;
+	char *name;
+};
+
+struct tegra_powergate {
+	struct generic_pm_domain genpd;
+	struct tegra_bpmp *bpmp;
+	unsigned int id;
+};
+
+static inline struct tegra_powergate *
+to_tegra_powergate(struct generic_pm_domain *genpd)
+{
+	return container_of(genpd, struct tegra_powergate, genpd);
+}
+
+static int tegra_bpmp_powergate_set_state(struct tegra_bpmp *bpmp,
+					  unsigned int id, u32 state)
+{
+	struct mrq_pg_request request;
+	struct tegra_bpmp_message msg;
+	int err;
+
+	memset(&request, 0, sizeof(request));
+	request.cmd = CMD_PG_SET_STATE;
+	request.id = id;
+	request.set_state.state = state;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.mrq = MRQ_PG;
+	msg.tx.data = &request;
+	msg.tx.size = sizeof(request);
+
+	err = tegra_bpmp_transfer(bpmp, &msg);
+	if (err < 0)
+		return err;
+	else if (msg.rx.ret < 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int tegra_bpmp_powergate_get_state(struct tegra_bpmp *bpmp,
+					  unsigned int id)
+{
+	struct mrq_pg_response response;
+	struct mrq_pg_request request;
+	struct tegra_bpmp_message msg;
+	int err;
+
+	memset(&request, 0, sizeof(request));
+	request.cmd = CMD_PG_GET_STATE;
+	request.id = id;
+
+	memset(&response, 0, sizeof(response));
+
+	memset(&msg, 0, sizeof(msg));
+	msg.mrq = MRQ_PG;
+	msg.tx.data = &request;
+	msg.tx.size = sizeof(request);
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	err = tegra_bpmp_transfer(bpmp, &msg);
+	if (err < 0)
+		return PG_STATE_OFF;
+	else if (msg.rx.ret < 0)
+		return -EINVAL;
+
+	return response.get_state.state;
+}
+
+static int tegra_bpmp_powergate_get_max_id(struct tegra_bpmp *bpmp)
+{
+	struct mrq_pg_response response;
+	struct mrq_pg_request request;
+	struct tegra_bpmp_message msg;
+	int err;
+
+	memset(&request, 0, sizeof(request));
+	request.cmd = CMD_PG_GET_MAX_ID;
+
+	memset(&response, 0, sizeof(response));
+
+	memset(&msg, 0, sizeof(msg));
+	msg.mrq = MRQ_PG;
+	msg.tx.data = &request;
+	msg.tx.size = sizeof(request);
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	err = tegra_bpmp_transfer(bpmp, &msg);
+	if (err < 0)
+		return err;
+	else if (msg.rx.ret < 0)
+		return -EINVAL;
+
+	return response.get_max_id.max_id;
+}
+
+static char *tegra_bpmp_powergate_get_name(struct tegra_bpmp *bpmp,
+					   unsigned int id)
+{
+	struct mrq_pg_response response;
+	struct mrq_pg_request request;
+	struct tegra_bpmp_message msg;
+	int err;
+
+	memset(&request, 0, sizeof(request));
+	request.cmd = CMD_PG_GET_NAME;
+	request.id = id;
+
+	memset(&response, 0, sizeof(response));
+
+	memset(&msg, 0, sizeof(msg));
+	msg.mrq = MRQ_PG;
+	msg.tx.data = &request;
+	msg.tx.size = sizeof(request);
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	err = tegra_bpmp_transfer(bpmp, &msg);
+	if (err < 0 || msg.rx.ret < 0)
+		return NULL;
+
+	return kstrdup(response.get_name.name, GFP_KERNEL);
+}
+
+static inline bool tegra_bpmp_powergate_is_powered(struct tegra_bpmp *bpmp,
+						   unsigned int id)
+{
+	return tegra_bpmp_powergate_get_state(bpmp, id) != PG_STATE_OFF;
+}
+
+static int tegra_powergate_power_on(struct generic_pm_domain *domain)
+{
+	struct tegra_powergate *powergate = to_tegra_powergate(domain);
+	struct tegra_bpmp *bpmp = powergate->bpmp;
+
+	return tegra_bpmp_powergate_set_state(bpmp, powergate->id,
+					      PG_STATE_ON);
+}
+
+static int tegra_powergate_power_off(struct generic_pm_domain *domain)
+{
+	struct tegra_powergate *powergate = to_tegra_powergate(domain);
+	struct tegra_bpmp *bpmp = powergate->bpmp;
+
+	return tegra_bpmp_powergate_set_state(bpmp, powergate->id,
+					      PG_STATE_OFF);
+}
+
+static struct tegra_powergate *
+tegra_powergate_add(struct tegra_bpmp *bpmp,
+		    const struct tegra_powergate_info *info)
+{
+	struct tegra_powergate *powergate;
+	bool off;
+	int err;
+
+	off = !tegra_bpmp_powergate_is_powered(bpmp, info->id);
+
+	powergate = devm_kzalloc(bpmp->dev, sizeof(*powergate), GFP_KERNEL);
+	if (!powergate)
+		return ERR_PTR(-ENOMEM);
+
+	powergate->id = info->id;
+	powergate->bpmp = bpmp;
+
+	powergate->genpd.name = kstrdup(info->name, GFP_KERNEL);
+	powergate->genpd.power_on = tegra_powergate_power_on;
+	powergate->genpd.power_off = tegra_powergate_power_off;
+
+	err = pm_genpd_init(&powergate->genpd, NULL, off);
+	if (err < 0) {
+		kfree(powergate->genpd.name);
+		return ERR_PTR(err);
+	}
+
+	return powergate;
+}
+
+static void tegra_powergate_remove(struct tegra_powergate *powergate)
+{
+	struct generic_pm_domain *genpd = &powergate->genpd;
+	struct tegra_bpmp *bpmp = powergate->bpmp;
+	int err;
+
+	err = pm_genpd_remove(genpd);
+	if (err < 0)
+		dev_err(bpmp->dev, "failed to remove power domain %s: %d\n",
+			genpd->name, err);
+
+	kfree(genpd->name);
+}
+
+static int
+tegra_bpmp_probe_powergates(struct tegra_bpmp *bpmp,
+			    struct tegra_powergate_info **powergatesp)
+{
+	struct tegra_powergate_info *powergates;
+	unsigned int max_id, id, count = 0;
+	unsigned int num_holes = 0;
+	int err;
+
+	err = tegra_bpmp_powergate_get_max_id(bpmp);
+	if (err < 0)
+		return err;
+
+	max_id = err;
+
+	dev_dbg(bpmp->dev, "maximum powergate ID: %u\n", max_id);
+
+	powergates = kcalloc(max_id + 1, sizeof(*powergates), GFP_KERNEL);
+	if (!powergates)
+		return -ENOMEM;
+
+	for (id = 0; id <= max_id; id++) {
+		struct tegra_powergate_info *info = &powergates[count];
+
+		info->name = tegra_bpmp_powergate_get_name(bpmp, id);
+		if (!info->name || info->name[0] == '\0') {
+			num_holes++;
+			continue;
+		}
+
+		info->id = id;
+		count++;
+	}
+
+	dev_dbg(bpmp->dev, "holes: %u\n", num_holes);
+
+	*powergatesp = powergates;
+
+	return count;
+}
+
+static int tegra_bpmp_add_powergates(struct tegra_bpmp *bpmp,
+				     struct tegra_powergate_info *powergates,
+				     unsigned int count)
+{
+	struct genpd_onecell_data *genpd = &bpmp->genpd;
+	struct generic_pm_domain **domains;
+	struct tegra_powergate *powergate;
+	unsigned int i;
+	int err;
+
+	domains = kcalloc(count, sizeof(*domains), GFP_KERNEL);
+	if (!domains)
+		return -ENOMEM;
+
+	for (i = 0; i < count; i++) {
+		powergate = tegra_powergate_add(bpmp, &powergates[i]);
+		if (IS_ERR(powergate)) {
+			err = PTR_ERR(powergate);
+			goto remove;
+		}
+
+		dev_dbg(bpmp->dev, "added power domain %s\n",
+			powergate->genpd.name);
+		domains[i] = &powergate->genpd;
+	}
+
+	genpd->num_domains = count;
+	genpd->domains = domains;
+
+	return 0;
+
+remove:
+	while (i--) {
+		powergate = to_tegra_powergate(domains[i]);
+		tegra_powergate_remove(powergate);
+	}
+
+	kfree(genpd->domains);
+	return err;
+}
+
+static void tegra_bpmp_remove_powergates(struct tegra_bpmp *bpmp)
+{
+	struct genpd_onecell_data *genpd = &bpmp->genpd;
+	unsigned int i = genpd->num_domains;
+	struct tegra_powergate *powergate;
+
+	while (i--) {
+		dev_dbg(bpmp->dev, "removing power domain %s\n",
+			genpd->domains[i]->name);
+		powergate = to_tegra_powergate(genpd->domains[i]);
+		tegra_powergate_remove(powergate);
+	}
+}
+
+static struct generic_pm_domain *
+tegra_powergate_xlate(struct of_phandle_args *spec, void *data)
+{
+	struct generic_pm_domain *domain = ERR_PTR(-ENOENT);
+	struct genpd_onecell_data *genpd = data;
+	unsigned int i;
+
+	for (i = 0; i < genpd->num_domains; i++) {
+		struct tegra_powergate *powergate;
+
+		powergate = to_tegra_powergate(genpd->domains[i]);
+		if (powergate->id == spec->args[0]) {
+			domain = &powergate->genpd;
+			break;
+		}
+	}
+
+	return domain;
+}
+
+int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp)
+{
+	struct device_node *np = bpmp->dev->of_node;
+	struct tegra_powergate_info *powergates;
+	struct device *dev = bpmp->dev;
+	unsigned int count, i;
+	int err;
+
+	err = tegra_bpmp_probe_powergates(bpmp, &powergates);
+	if (err < 0)
+		return err;
+
+	count = err;
+
+	dev_dbg(dev, "%u power domains probed\n", count);
+
+	err = tegra_bpmp_add_powergates(bpmp, powergates, count);
+	if (err < 0)
+		goto free;
+
+	bpmp->genpd.xlate = tegra_powergate_xlate;
+
+	err = of_genpd_add_provider_onecell(np, &bpmp->genpd);
+	if (err < 0) {
+		dev_err(dev, "failed to add power domain provider: %d\n", err);
+		tegra_bpmp_remove_powergates(bpmp);
+	}
+
+free:
+	for (i = 0; i < count; i++)
+		kfree(powergates[i].name);
+
+	kfree(powergates);
+	return err;
+}