Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 223 insertions, 0 deletions

diff --git a/drivers/clk/mvebu/ap806-system-controller.c b/drivers/clk/mvebu/ap806-system-controller.c
new file mode 100644
index 000000000..fa2fbd2ce
--- /dev/null
+++ b/drivers/clk/mvebu/ap806-system-controller.c
@@ -0,0 +1,223 @@
+/*
+ * Marvell Armada AP806 System Controller
+ *
+ * Copyright (C) 2016 Marvell
+ *
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#define pr_fmt(fmt) "ap806-system-controller: " fmt
+
+#include <linux/clk-provider.h>
+#include <linux/mfd/syscon.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define AP806_SAR_REG			0x400
+#define AP806_SAR_CLKFREQ_MODE_MASK	0x1f
+
+#define AP806_CLK_NUM			5
+
+static struct clk *ap806_clks[AP806_CLK_NUM];
+
+static struct clk_onecell_data ap806_clk_data = {
+	.clks = ap806_clks,
+	.clk_num = AP806_CLK_NUM,
+};
+
+static char *ap806_unique_name(struct device *dev, struct device_node *np,
+			       char *name)
+{
+	const __be32 *reg;
+	u64 addr;
+
+	reg = of_get_property(np, "reg", NULL);
+	addr = of_translate_address(np, reg);
+	return devm_kasprintf(dev, GFP_KERNEL, "%llx-%s",
+			(unsigned long long)addr, name);
+}
+
+static int ap806_syscon_common_probe(struct platform_device *pdev,
+				     struct device_node *syscon_node)
+{
+	unsigned int freq_mode, cpuclk_freq;
+	const char *name, *fixedclk_name;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct regmap *regmap;
+	u32 reg;
+	int ret;
+
+	regmap = syscon_node_to_regmap(syscon_node);
+	if (IS_ERR(regmap)) {
+		dev_err(dev, "cannot get regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	ret = regmap_read(regmap, AP806_SAR_REG, &reg);
+	if (ret) {
+		dev_err(dev, "cannot read from regmap\n");
+		return ret;
+	}
+
+	freq_mode = reg & AP806_SAR_CLKFREQ_MODE_MASK;
+	switch (freq_mode) {
+	case 0x0:
+	case 0x1:
+		cpuclk_freq = 2000;
+		break;
+	case 0x6:
+	case 0x7:
+		cpuclk_freq = 1800;
+		break;
+	case 0x4:
+	case 0xB:
+	case 0xD:
+		cpuclk_freq = 1600;
+		break;
+	case 0x1a:
+		cpuclk_freq = 1400;
+		break;
+	case 0x14:
+	case 0x17:
+		cpuclk_freq = 1300;
+		break;
+	case 0x19:
+		cpuclk_freq = 1200;
+		break;
+	case 0x13:
+	case 0x1d:
+		cpuclk_freq = 1000;
+		break;
+	case 0x1c:
+		cpuclk_freq = 800;
+		break;
+	case 0x1b:
+		cpuclk_freq = 600;
+		break;
+	default:
+		dev_err(dev, "invalid SAR value\n");
+		return -EINVAL;
+	}
+
+	/* Convert to hertz */
+	cpuclk_freq *= 1000 * 1000;
+
+	/* CPU clocks depend on the Sample At Reset configuration */
+	name = ap806_unique_name(dev, syscon_node, "cpu-cluster-0");
+	ap806_clks[0] = clk_register_fixed_rate(dev, name, NULL,
+						0, cpuclk_freq);
+	if (IS_ERR(ap806_clks[0])) {
+		ret = PTR_ERR(ap806_clks[0]);
+		goto fail0;
+	}
+
+	name = ap806_unique_name(dev, syscon_node, "cpu-cluster-1");
+	ap806_clks[1] = clk_register_fixed_rate(dev, name, NULL, 0,
+						cpuclk_freq);
+	if (IS_ERR(ap806_clks[1])) {
+		ret = PTR_ERR(ap806_clks[1]);
+		goto fail1;
+	}
+
+	/* Fixed clock is always 1200 Mhz */
+	fixedclk_name = ap806_unique_name(dev, syscon_node, "fixed");
+	ap806_clks[2] = clk_register_fixed_rate(dev, fixedclk_name, NULL,
+						0, 1200 * 1000 * 1000);
+	if (IS_ERR(ap806_clks[2])) {
+		ret = PTR_ERR(ap806_clks[2]);
+		goto fail2;
+	}
+
+	/* MSS Clock is fixed clock divided by 6 */
+	name = ap806_unique_name(dev, syscon_node, "mss");
+	ap806_clks[3] = clk_register_fixed_factor(NULL, name, fixedclk_name,
+						  0, 1, 6);
+	if (IS_ERR(ap806_clks[3])) {
+		ret = PTR_ERR(ap806_clks[3]);
+		goto fail3;
+	}
+
+	/* SDIO(/eMMC) Clock is fixed clock divided by 3 */
+	name = ap806_unique_name(dev, syscon_node, "sdio");
+	ap806_clks[4] = clk_register_fixed_factor(NULL, name,
+						  fixedclk_name,
+						  0, 1, 3);
+	if (IS_ERR(ap806_clks[4])) {
+		ret = PTR_ERR(ap806_clks[4]);
+		goto fail4;
+	}
+
+	of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data);
+	ret = of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data);
+	if (ret)
+		goto fail_clk_add;
+
+	return 0;
+
+fail_clk_add:
+	clk_unregister_fixed_factor(ap806_clks[4]);
+fail4:
+	clk_unregister_fixed_factor(ap806_clks[3]);
+fail3:
+	clk_unregister_fixed_rate(ap806_clks[2]);
+fail2:
+	clk_unregister_fixed_rate(ap806_clks[1]);
+fail1:
+	clk_unregister_fixed_rate(ap806_clks[0]);
+fail0:
+	return ret;
+}
+
+static int ap806_syscon_legacy_probe(struct platform_device *pdev)
+{
+	dev_warn(&pdev->dev, FW_WARN "Using legacy device tree binding\n");
+	dev_warn(&pdev->dev, FW_WARN "Update your device tree:\n");
+	dev_warn(&pdev->dev, FW_WARN
+		 "This binding won't be supported in future kernel\n");
+
+	return ap806_syscon_common_probe(pdev, pdev->dev.of_node);
+
+}
+
+static int ap806_clock_probe(struct platform_device *pdev)
+{
+	return ap806_syscon_common_probe(pdev, pdev->dev.of_node->parent);
+}
+
+static const struct of_device_id ap806_syscon_legacy_of_match[] = {
+	{ .compatible = "marvell,ap806-system-controller", },
+	{ }
+};
+
+static struct platform_driver ap806_syscon_legacy_driver = {
+	.probe = ap806_syscon_legacy_probe,
+	.driver		= {
+		.name	= "marvell-ap806-system-controller",
+		.of_match_table = ap806_syscon_legacy_of_match,
+		.suppress_bind_attrs = true,
+	},
+};
+builtin_platform_driver(ap806_syscon_legacy_driver);
+
+static const struct of_device_id ap806_clock_of_match[] = {
+	{ .compatible = "marvell,ap806-clock", },
+	{ }
+};
+
+static struct platform_driver ap806_clock_driver = {
+	.probe = ap806_clock_probe,
+	.driver		= {
+		.name	= "marvell-ap806-clock",
+		.of_match_table = ap806_clock_of_match,
+		.suppress_bind_attrs = true,
+	},
+};
+builtin_platform_driver(ap806_clock_driver);