Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 166 insertions, 0 deletions

diff --git a/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c b/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c
new file mode 100644
index 000000000..edc31bb56
--- /dev/null
+++ b/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c
@@ -0,0 +1,166 @@
+/*
+ * Tegra124 DFLL FCPU clock source driver
+ *
+ * Copyright (C) 2012-2014 NVIDIA Corporation.  All rights reserved.
+ *
+ * Aleksandr Frid <afrid@nvidia.com>
+ * Paul Walmsley <pwalmsley@nvidia.com>
+ *
+ * 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.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/cpu.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <soc/tegra/fuse.h>
+
+#include "clk.h"
+#include "clk-dfll.h"
+#include "cvb.h"
+
+/* Maximum CPU frequency, indexed by CPU speedo id */
+static const unsigned long cpu_max_freq_table[] = {
+	[0] = 2014500000UL,
+	[1] = 2320500000UL,
+	[2] = 2116500000UL,
+	[3] = 2524500000UL,
+};
+
+static const struct cvb_table tegra124_cpu_cvb_tables[] = {
+	{
+		.speedo_id = -1,
+		.process_id = -1,
+		.min_millivolts = 900,
+		.max_millivolts = 1260,
+		.alignment = {
+			.step_uv = 10000, /* 10mV */
+		},
+		.speedo_scale = 100,
+		.voltage_scale = 1000,
+		.entries = {
+			{  204000000UL, { 1112619, -29295, 402 } },
+			{  306000000UL, { 1150460, -30585, 402 } },
+			{  408000000UL, { 1190122, -31865, 402 } },
+			{  510000000UL, { 1231606, -33155, 402 } },
+			{  612000000UL, { 1274912, -34435, 402 } },
+			{  714000000UL, { 1320040, -35725, 402 } },
+			{  816000000UL, { 1366990, -37005, 402 } },
+			{  918000000UL, { 1415762, -38295, 402 } },
+			{ 1020000000UL, { 1466355, -39575, 402 } },
+			{ 1122000000UL, { 1518771, -40865, 402 } },
+			{ 1224000000UL, { 1573009, -42145, 402 } },
+			{ 1326000000UL, { 1629068, -43435, 402 } },
+			{ 1428000000UL, { 1686950, -44715, 402 } },
+			{ 1530000000UL, { 1746653, -46005, 402 } },
+			{ 1632000000UL, { 1808179, -47285, 402 } },
+			{ 1734000000UL, { 1871526, -48575, 402 } },
+			{ 1836000000UL, { 1936696, -49855, 402 } },
+			{ 1938000000UL, { 2003687, -51145, 402 } },
+			{ 2014500000UL, { 2054787, -52095, 402 } },
+			{ 2116500000UL, { 2124957, -53385, 402 } },
+			{ 2218500000UL, { 2196950, -54665, 402 } },
+			{ 2320500000UL, { 2270765, -55955, 402 } },
+			{ 2422500000UL, { 2346401, -57235, 402 } },
+			{ 2524500000UL, { 2437299, -58535, 402 } },
+			{          0UL, {       0,      0,   0 } },
+		},
+		.cpu_dfll_data = {
+			.tune0_low = 0x005020ff,
+			.tune0_high = 0x005040ff,
+			.tune1 = 0x00000060,
+		}
+	},
+};
+
+static int tegra124_dfll_fcpu_probe(struct platform_device *pdev)
+{
+	int process_id, speedo_id, speedo_value, err;
+	struct tegra_dfll_soc_data *soc;
+
+	process_id = tegra_sku_info.cpu_process_id;
+	speedo_id = tegra_sku_info.cpu_speedo_id;
+	speedo_value = tegra_sku_info.cpu_speedo_value;
+
+	if (speedo_id >= ARRAY_SIZE(cpu_max_freq_table)) {
+		dev_err(&pdev->dev, "unknown max CPU freq for speedo_id=%d\n",
+			speedo_id);
+		return -ENODEV;
+	}
+
+	soc = devm_kzalloc(&pdev->dev, sizeof(*soc), GFP_KERNEL);
+	if (!soc)
+		return -ENOMEM;
+
+	soc->dev = get_cpu_device(0);
+	if (!soc->dev) {
+		dev_err(&pdev->dev, "no CPU0 device\n");
+		return -ENODEV;
+	}
+
+	soc->max_freq = cpu_max_freq_table[speedo_id];
+
+	soc->cvb = tegra_cvb_add_opp_table(soc->dev, tegra124_cpu_cvb_tables,
+					   ARRAY_SIZE(tegra124_cpu_cvb_tables),
+					   process_id, speedo_id, speedo_value,
+					   soc->max_freq);
+	if (IS_ERR(soc->cvb)) {
+		dev_err(&pdev->dev, "couldn't add OPP table: %ld\n",
+			PTR_ERR(soc->cvb));
+		return PTR_ERR(soc->cvb);
+	}
+
+	err = tegra_dfll_register(pdev, soc);
+	if (err < 0) {
+		tegra_cvb_remove_opp_table(soc->dev, soc->cvb, soc->max_freq);
+		return err;
+	}
+
+	return 0;
+}
+
+static int tegra124_dfll_fcpu_remove(struct platform_device *pdev)
+{
+	struct tegra_dfll_soc_data *soc;
+
+	soc = tegra_dfll_unregister(pdev);
+	if (IS_ERR(soc)) {
+		dev_err(&pdev->dev, "failed to unregister DFLL: %ld\n",
+			PTR_ERR(soc));
+		return PTR_ERR(soc);
+	}
+
+	tegra_cvb_remove_opp_table(soc->dev, soc->cvb, soc->max_freq);
+
+	return 0;
+}
+
+static const struct of_device_id tegra124_dfll_fcpu_of_match[] = {
+	{ .compatible = "nvidia,tegra124-dfll", },
+	{ },
+};
+
+static const struct dev_pm_ops tegra124_dfll_pm_ops = {
+	SET_RUNTIME_PM_OPS(tegra_dfll_runtime_suspend,
+			   tegra_dfll_runtime_resume, NULL)
+};
+
+static struct platform_driver tegra124_dfll_fcpu_driver = {
+	.probe = tegra124_dfll_fcpu_probe,
+	.remove = tegra124_dfll_fcpu_remove,
+	.driver = {
+		.name = "tegra124-dfll",
+		.of_match_table = tegra124_dfll_fcpu_of_match,
+		.pm = &tegra124_dfll_pm_ops,
+	},
+};
+builtin_platform_driver(tegra124_dfll_fcpu_driver);