Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 395 insertions, 0 deletions

diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
new file mode 100644
index 0000000000..ccc2eea7f9
--- /dev/null
+++ b/drivers/thermal/qoriq_thermal.c
@@ -0,0 +1,395 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright 2016 Freescale Semiconductor, Inc.
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/sizes.h>
+#include <linux/thermal.h>
+#include <linux/units.h>
+
+#include "thermal_hwmon.h"
+
+#define SITES_MAX		16
+#define TMR_DISABLE		0x0
+#define TMR_ME			0x80000000
+#define TMR_ALPF		0x0c000000
+#define TMR_ALPF_V2		0x03000000
+#define TMTMIR_DEFAULT	0x0000000f
+#define TIER_DISABLE	0x0
+#define TEUMR0_V2		0x51009c00
+#define TMSARA_V2		0xe
+#define TMU_VER1		0x1
+#define TMU_VER2		0x2
+
+#define REGS_TMR	0x000	/* Mode Register */
+#define TMR_DISABLE	0x0
+#define TMR_ME		0x80000000
+#define TMR_ALPF	0x0c000000
+
+#define REGS_TMTMIR	0x008	/* Temperature measurement interval Register */
+#define TMTMIR_DEFAULT	0x0000000f
+
+#define REGS_V2_TMSR	0x008	/* monitor site register */
+
+#define REGS_V2_TMTMIR	0x00c	/* Temperature measurement interval Register */
+
+#define REGS_TIER	0x020	/* Interrupt Enable Register */
+#define TIER_DISABLE	0x0
+
+
+#define REGS_TTCFGR	0x080	/* Temperature Configuration Register */
+#define REGS_TSCFGR	0x084	/* Sensor Configuration Register */
+
+#define REGS_TRITSR(n)	(0x100 + 16 * (n)) /* Immediate Temperature
+					    * Site Register
+					    */
+#define TRITSR_V	BIT(31)
+#define TRITSR_TP5	BIT(9)
+#define REGS_V2_TMSAR(n)	(0x304 + 16 * (n))	/* TMU monitoring
+						* site adjustment register
+						*/
+#define REGS_TTRnCR(n)	(0xf10 + 4 * (n)) /* Temperature Range n
+					   * Control Register
+					   */
+#define REGS_IPBRR(n)		(0xbf8 + 4 * (n)) /* IP Block Revision
+						   * Register n
+						   */
+#define REGS_V2_TEUMR(n)	(0xf00 + 4 * (n))
+
+/*
+ * Thermal zone data
+ */
+struct qoriq_sensor {
+	int				id;
+};
+
+struct qoriq_tmu_data {
+	int ver;
+	struct regmap *regmap;
+	struct clk *clk;
+	struct qoriq_sensor	sensor[SITES_MAX];
+};
+
+static struct qoriq_tmu_data *qoriq_sensor_to_data(struct qoriq_sensor *s)
+{
+	return container_of(s, struct qoriq_tmu_data, sensor[s->id]);
+}
+
+static int tmu_get_temp(struct thermal_zone_device *tz, int *temp)
+{
+	struct qoriq_sensor *qsensor = thermal_zone_device_priv(tz);
+	struct qoriq_tmu_data *qdata = qoriq_sensor_to_data(qsensor);
+	u32 val;
+	/*
+	 * REGS_TRITSR(id) has the following layout:
+	 *
+	 * For TMU Rev1:
+	 * 31  ... 7 6 5 4 3 2 1 0
+	 *  V          TEMP
+	 *
+	 * Where V bit signifies if the measurement is ready and is
+	 * within sensor range. TEMP is an 8 bit value representing
+	 * temperature in Celsius.
+
+	 * For TMU Rev2:
+	 * 31  ... 8 7 6 5 4 3 2 1 0
+	 *  V          TEMP
+	 *
+	 * Where V bit signifies if the measurement is ready and is
+	 * within sensor range. TEMP is an 9 bit value representing
+	 * temperature in KelVin.
+	 */
+
+	regmap_read(qdata->regmap, REGS_TMR, &val);
+	if (!(val & TMR_ME))
+		return -EAGAIN;
+
+	if (regmap_read_poll_timeout(qdata->regmap,
+				     REGS_TRITSR(qsensor->id),
+				     val,
+				     val & TRITSR_V,
+				     USEC_PER_MSEC,
+				     10 * USEC_PER_MSEC))
+		return -ENODATA;
+
+	if (qdata->ver == TMU_VER1) {
+		*temp = (val & GENMASK(7, 0)) * MILLIDEGREE_PER_DEGREE;
+	} else {
+		if (val & TRITSR_TP5)
+			*temp = milli_kelvin_to_millicelsius((val & GENMASK(8, 0)) *
+							     MILLIDEGREE_PER_DEGREE + 500);
+		else
+			*temp = kelvin_to_millicelsius(val & GENMASK(8, 0));
+	}
+
+	return 0;
+}
+
+static const struct thermal_zone_device_ops tmu_tz_ops = {
+	.get_temp = tmu_get_temp,
+};
+
+static int qoriq_tmu_register_tmu_zone(struct device *dev,
+				       struct qoriq_tmu_data *qdata)
+{
+	int id, sites = 0;
+
+	for (id = 0; id < SITES_MAX; id++) {
+		struct thermal_zone_device *tzd;
+		struct qoriq_sensor *sensor = &qdata->sensor[id];
+		int ret;
+
+		sensor->id = id;
+
+		tzd = devm_thermal_of_zone_register(dev, id,
+						    sensor,
+						    &tmu_tz_ops);
+		ret = PTR_ERR_OR_ZERO(tzd);
+		if (ret) {
+			if (ret == -ENODEV)
+				continue;
+
+			return ret;
+		}
+
+		if (qdata->ver == TMU_VER1)
+			sites |= 0x1 << (15 - id);
+		else
+			sites |= 0x1 << id;
+
+		devm_thermal_add_hwmon_sysfs(dev, tzd);
+	}
+
+	if (sites) {
+		if (qdata->ver == TMU_VER1) {
+			regmap_write(qdata->regmap, REGS_TMR, TMR_ME | TMR_ALPF | sites);
+		} else {
+			regmap_write(qdata->regmap, REGS_V2_TMSR, sites);
+			regmap_write(qdata->regmap, REGS_TMR, TMR_ME | TMR_ALPF_V2);
+		}
+	}
+
+	return 0;
+}
+
+static int qoriq_tmu_calibration(struct device *dev,
+				 struct qoriq_tmu_data *data)
+{
+	int i, val, len;
+	u32 range[4];
+	const u32 *calibration;
+	struct device_node *np = dev->of_node;
+
+	len = of_property_count_u32_elems(np, "fsl,tmu-range");
+	if (len < 0 || len > 4) {
+		dev_err(dev, "invalid range data.\n");
+		return len;
+	}
+
+	val = of_property_read_u32_array(np, "fsl,tmu-range", range, len);
+	if (val != 0) {
+		dev_err(dev, "failed to read range data.\n");
+		return val;
+	}
+
+	/* Init temperature range registers */
+	for (i = 0; i < len; i++)
+		regmap_write(data->regmap, REGS_TTRnCR(i), range[i]);
+
+	calibration = of_get_property(np, "fsl,tmu-calibration", &len);
+	if (calibration == NULL || len % 8) {
+		dev_err(dev, "invalid calibration data.\n");
+		return -ENODEV;
+	}
+
+	for (i = 0; i < len; i += 8, calibration += 2) {
+		val = of_read_number(calibration, 1);
+		regmap_write(data->regmap, REGS_TTCFGR, val);
+		val = of_read_number(calibration + 1, 1);
+		regmap_write(data->regmap, REGS_TSCFGR, val);
+	}
+
+	return 0;
+}
+
+static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
+{
+	/* Disable interrupt, using polling instead */
+	regmap_write(data->regmap, REGS_TIER, TIER_DISABLE);
+
+	/* Set update_interval */
+
+	if (data->ver == TMU_VER1) {
+		regmap_write(data->regmap, REGS_TMTMIR, TMTMIR_DEFAULT);
+	} else {
+		regmap_write(data->regmap, REGS_V2_TMTMIR, TMTMIR_DEFAULT);
+		regmap_write(data->regmap, REGS_V2_TEUMR(0), TEUMR0_V2);
+	}
+
+	/* Disable monitoring */
+	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
+}
+
+static const struct regmap_range qoriq_yes_ranges[] = {
+	regmap_reg_range(REGS_TMR, REGS_TSCFGR),
+	regmap_reg_range(REGS_TTRnCR(0), REGS_TTRnCR(15)),
+	regmap_reg_range(REGS_V2_TEUMR(0), REGS_V2_TEUMR(2)),
+	regmap_reg_range(REGS_V2_TMSAR(0), REGS_V2_TMSAR(15)),
+	regmap_reg_range(REGS_IPBRR(0), REGS_IPBRR(1)),
+	/* Read only registers below */
+	regmap_reg_range(REGS_TRITSR(0), REGS_TRITSR(15)),
+};
+
+static const struct regmap_access_table qoriq_wr_table = {
+	.yes_ranges	= qoriq_yes_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(qoriq_yes_ranges) - 1,
+};
+
+static const struct regmap_access_table qoriq_rd_table = {
+	.yes_ranges	= qoriq_yes_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(qoriq_yes_ranges),
+};
+
+static void qoriq_tmu_action(void *p)
+{
+	struct qoriq_tmu_data *data = p;
+
+	regmap_write(data->regmap, REGS_TMR, TMR_DISABLE);
+	clk_disable_unprepare(data->clk);
+}
+
+static int qoriq_tmu_probe(struct platform_device *pdev)
+{
+	int ret;
+	u32 ver;
+	struct qoriq_tmu_data *data;
+	struct device_node *np = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	const bool little_endian = of_property_read_bool(np, "little-endian");
+	const enum regmap_endian format_endian =
+		little_endian ? REGMAP_ENDIAN_LITTLE : REGMAP_ENDIAN_BIG;
+	const struct regmap_config regmap_config = {
+		.reg_bits		= 32,
+		.val_bits		= 32,
+		.reg_stride		= 4,
+		.rd_table		= &qoriq_rd_table,
+		.wr_table		= &qoriq_wr_table,
+		.val_format_endian	= format_endian,
+		.max_register		= SZ_4K,
+	};
+	void __iomem *base;
+
+	data = devm_kzalloc(dev, sizeof(struct qoriq_tmu_data),
+			    GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	ret = PTR_ERR_OR_ZERO(base);
+	if (ret) {
+		dev_err(dev, "Failed to get memory region\n");
+		return ret;
+	}
+
+	data->regmap = devm_regmap_init_mmio(dev, base, &regmap_config);
+	ret = PTR_ERR_OR_ZERO(data->regmap);
+	if (ret) {
+		dev_err(dev, "Failed to init regmap (%d)\n", ret);
+		return ret;
+	}
+
+	data->clk = devm_clk_get_optional(dev, NULL);
+	if (IS_ERR(data->clk))
+		return PTR_ERR(data->clk);
+
+	ret = clk_prepare_enable(data->clk);
+	if (ret) {
+		dev_err(dev, "Failed to enable clock\n");
+		return ret;
+	}
+
+	ret = devm_add_action_or_reset(dev, qoriq_tmu_action, data);
+	if (ret)
+		return ret;
+
+	/* version register offset at: 0xbf8 on both v1 and v2 */
+	ret = regmap_read(data->regmap, REGS_IPBRR(0), &ver);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to read IP block version\n");
+		return ret;
+	}
+	data->ver = (ver >> 8) & 0xff;
+
+	qoriq_tmu_init_device(data);	/* TMU initialization */
+
+	ret = qoriq_tmu_calibration(dev, data);	/* TMU calibration */
+	if (ret < 0)
+		return ret;
+
+	ret = qoriq_tmu_register_tmu_zone(dev, data);
+	if (ret < 0) {
+		dev_err(dev, "Failed to register sensors\n");
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, data);
+
+	return 0;
+}
+
+static int __maybe_unused qoriq_tmu_suspend(struct device *dev)
+{
+	struct qoriq_tmu_data *data = dev_get_drvdata(dev);
+	int ret;
+
+	ret = regmap_update_bits(data->regmap, REGS_TMR, TMR_ME, 0);
+	if (ret)
+		return ret;
+
+	clk_disable_unprepare(data->clk);
+
+	return 0;
+}
+
+static int __maybe_unused qoriq_tmu_resume(struct device *dev)
+{
+	int ret;
+	struct qoriq_tmu_data *data = dev_get_drvdata(dev);
+
+	ret = clk_prepare_enable(data->clk);
+	if (ret)
+		return ret;
+
+	/* Enable monitoring */
+	return regmap_update_bits(data->regmap, REGS_TMR, TMR_ME, TMR_ME);
+}
+
+static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops,
+			 qoriq_tmu_suspend, qoriq_tmu_resume);
+
+static const struct of_device_id qoriq_tmu_match[] = {
+	{ .compatible = "fsl,qoriq-tmu", },
+	{ .compatible = "fsl,imx8mq-tmu", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, qoriq_tmu_match);
+
+static struct platform_driver qoriq_tmu = {
+	.driver	= {
+		.name		= "qoriq_thermal",
+		.pm		= &qoriq_tmu_pm_ops,
+		.of_match_table	= qoriq_tmu_match,
+	},
+	.probe	= qoriq_tmu_probe,
+};
+module_platform_driver(qoriq_tmu);
+
+MODULE_AUTHOR("Jia Hongtao <hongtao.jia@nxp.com>");
+MODULE_DESCRIPTION("QorIQ Thermal Monitoring Unit driver");
+MODULE_LICENSE("GPL v2");