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-rw-r--r--target/linux/imx6/patches-3.10/0015-thermal-add-imx-thermal-driver-support.patch477
1 files changed, 0 insertions, 477 deletions
diff --git a/target/linux/imx6/patches-3.10/0015-thermal-add-imx-thermal-driver-support.patch b/target/linux/imx6/patches-3.10/0015-thermal-add-imx-thermal-driver-support.patch
deleted file mode 100644
index 0b7ac7d308..0000000000
--- a/target/linux/imx6/patches-3.10/0015-thermal-add-imx-thermal-driver-support.patch
+++ /dev/null
@@ -1,477 +0,0 @@
-From ca3de46b50809000b5ba708634e26ad979a4a63a Mon Sep 17 00:00:00 2001
-From: Shawn Guo <shawn.guo@linaro.org>
-Date: Mon, 24 Jun 2013 14:30:44 +0800
-Subject: [PATCH] thermal: add imx thermal driver support
-
-This is based on the initial imx thermal work done by
-Rob Lee <rob.lee@linaro.org> (Not sure if the email address is still
-valid). Since he is no longer interested in the work and I have
-rewritten a significant amount of the code, I just took the authorship
-over from him.
-
-It adds the imx thermal support using Temperature Monitor (TEMPMON)
-block found on some Freescale i.MX SoCs. The driver uses syscon regmap
-interface to access TEMPMON control registers and calibration data, and
-supports cpufreq as the cooling device.
-
-Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
-Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
----
- .../devicetree/bindings/thermal/imx-thermal.txt | 17 +
- drivers/thermal/Kconfig | 11 +
- drivers/thermal/Makefile | 1 +
- drivers/thermal/imx_thermal.c | 397 +++++++++++++++++++++
- 4 files changed, 426 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/thermal/imx-thermal.txt
- create mode 100644 drivers/thermal/imx_thermal.c
-
---- /dev/null
-+++ b/Documentation/devicetree/bindings/thermal/imx-thermal.txt
-@@ -0,0 +1,17 @@
-+* Temperature Monitor (TEMPMON) on Freescale i.MX SoCs
-+
-+Required properties:
-+- compatible : "fsl,imx6q-thermal"
-+- fsl,tempmon : phandle pointer to system controller that contains TEMPMON
-+ control registers, e.g. ANATOP on imx6q.
-+- fsl,tempmon-data : phandle pointer to fuse controller that contains TEMPMON
-+ calibration data, e.g. OCOTP on imx6q. The details about calibration data
-+ can be found in SoC Reference Manual.
-+
-+Example:
-+
-+tempmon {
-+ compatible = "fsl,imx6q-tempmon";
-+ fsl,tempmon = <&anatop>;
-+ fsl,tempmon-data = <&ocotp>;
-+};
---- a/drivers/thermal/Kconfig
-+++ b/drivers/thermal/Kconfig
-@@ -91,6 +91,17 @@ config THERMAL_EMULATION
- because userland can easily disable the thermal policy by simply
- flooding this sysfs node with low temperature values.
-
-+config IMX_THERMAL
-+ tristate "Temperature sensor driver for Freescale i.MX SoCs"
-+ depends on CPU_THERMAL
-+ depends on MFD_SYSCON
-+ depends on OF
-+ help
-+ Support for Temperature Monitor (TEMPMON) found on Freescale i.MX SoCs.
-+ It supports one critical trip point and one passive trip point. The
-+ cpufreq is used as the cooling device to throttle CPUs when the
-+ passive trip is crossed.
-+
- config SPEAR_THERMAL
- bool "SPEAr thermal sensor driver"
- depends on PLAT_SPEAR
---- a/drivers/thermal/Makefile
-+++ b/drivers/thermal/Makefile
-@@ -21,6 +21,7 @@ obj-$(CONFIG_EXYNOS_THERMAL) += exynos_t
- obj-$(CONFIG_DOVE_THERMAL) += dove_thermal.o
- obj-$(CONFIG_DB8500_THERMAL) += db8500_thermal.o
- obj-$(CONFIG_ARMADA_THERMAL) += armada_thermal.o
-+obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o
- obj-$(CONFIG_DB8500_CPUFREQ_COOLING) += db8500_cpufreq_cooling.o
- obj-$(CONFIG_INTEL_POWERCLAMP) += intel_powerclamp.o
-
---- /dev/null
-+++ b/drivers/thermal/imx_thermal.c
-@@ -0,0 +1,397 @@
-+/*
-+ * Copyright 2013 Freescale Semiconductor, Inc.
-+ *
-+ * 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/cpu_cooling.h>
-+#include <linux/cpufreq.h>
-+#include <linux/delay.h>
-+#include <linux/device.h>
-+#include <linux/init.h>
-+#include <linux/io.h>
-+#include <linux/kernel.h>
-+#include <linux/mfd/syscon.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/platform_device.h>
-+#include <linux/regmap.h>
-+#include <linux/slab.h>
-+#include <linux/thermal.h>
-+#include <linux/types.h>
-+
-+#define REG_SET 0x4
-+#define REG_CLR 0x8
-+#define REG_TOG 0xc
-+
-+#define MISC0 0x0150
-+#define MISC0_REFTOP_SELBIASOFF (1 << 3)
-+
-+#define TEMPSENSE0 0x0180
-+#define TEMPSENSE0_TEMP_CNT_SHIFT 8
-+#define TEMPSENSE0_TEMP_CNT_MASK (0xfff << TEMPSENSE0_TEMP_CNT_SHIFT)
-+#define TEMPSENSE0_FINISHED (1 << 2)
-+#define TEMPSENSE0_MEASURE_TEMP (1 << 1)
-+#define TEMPSENSE0_POWER_DOWN (1 << 0)
-+
-+#define TEMPSENSE1 0x0190
-+#define TEMPSENSE1_MEASURE_FREQ 0xffff
-+
-+#define OCOTP_ANA1 0x04e0
-+
-+/* The driver supports 1 passive trip point and 1 critical trip point */
-+enum imx_thermal_trip {
-+ IMX_TRIP_PASSIVE,
-+ IMX_TRIP_CRITICAL,
-+ IMX_TRIP_NUM,
-+};
-+
-+/*
-+ * It defines the temperature in millicelsius for passive trip point
-+ * that will trigger cooling action when crossed.
-+ */
-+#define IMX_TEMP_PASSIVE 85000
-+
-+/*
-+ * The maximum die temperature on imx parts is 105C, let's give some cushion
-+ * for noise and possible temperature rise between measurements.
-+ */
-+#define IMX_TEMP_CRITICAL 100000
-+
-+#define IMX_POLLING_DELAY 2000 /* millisecond */
-+#define IMX_PASSIVE_DELAY 1000
-+
-+struct imx_thermal_data {
-+ struct thermal_zone_device *tz;
-+ struct thermal_cooling_device *cdev;
-+ enum thermal_device_mode mode;
-+ struct regmap *tempmon;
-+ int c1, c2; /* See formula in imx_get_sensor_data() */
-+};
-+
-+static int imx_get_temp(struct thermal_zone_device *tz, unsigned long *temp)
-+{
-+ struct imx_thermal_data *data = tz->devdata;
-+ struct regmap *map = data->tempmon;
-+ static unsigned long last_temp;
-+ unsigned int n_meas;
-+ u32 val;
-+
-+ /*
-+ * Every time we measure the temperature, we will power on the
-+ * temperature sensor, enable measurements, take a reading,
-+ * disable measurements, power off the temperature sensor.
-+ */
-+ regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
-+ regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
-+
-+ /*
-+ * According to the temp sensor designers, it may require up to ~17us
-+ * to complete a measurement.
-+ */
-+ usleep_range(20, 50);
-+
-+ regmap_read(map, TEMPSENSE0, &val);
-+ regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
-+ regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
-+
-+ if ((val & TEMPSENSE0_FINISHED) == 0) {
-+ dev_dbg(&tz->device, "temp measurement never finished\n");
-+ return -EAGAIN;
-+ }
-+
-+ n_meas = (val & TEMPSENSE0_TEMP_CNT_MASK) >> TEMPSENSE0_TEMP_CNT_SHIFT;
-+
-+ /* See imx_get_sensor_data() for formula derivation */
-+ *temp = data->c2 + data->c1 * n_meas;
-+
-+ if (*temp != last_temp) {
-+ dev_dbg(&tz->device, "millicelsius: %ld\n", *temp);
-+ last_temp = *temp;
-+ }
-+
-+ return 0;
-+}
-+
-+static int imx_get_mode(struct thermal_zone_device *tz,
-+ enum thermal_device_mode *mode)
-+{
-+ struct imx_thermal_data *data = tz->devdata;
-+
-+ *mode = data->mode;
-+
-+ return 0;
-+}
-+
-+static int imx_set_mode(struct thermal_zone_device *tz,
-+ enum thermal_device_mode mode)
-+{
-+ struct imx_thermal_data *data = tz->devdata;
-+
-+ if (mode == THERMAL_DEVICE_ENABLED) {
-+ tz->polling_delay = IMX_POLLING_DELAY;
-+ tz->passive_delay = IMX_PASSIVE_DELAY;
-+ } else {
-+ tz->polling_delay = 0;
-+ tz->passive_delay = 0;
-+ }
-+
-+ data->mode = mode;
-+ thermal_zone_device_update(tz);
-+
-+ return 0;
-+}
-+
-+static int imx_get_trip_type(struct thermal_zone_device *tz, int trip,
-+ enum thermal_trip_type *type)
-+{
-+ *type = (trip == IMX_TRIP_PASSIVE) ? THERMAL_TRIP_PASSIVE :
-+ THERMAL_TRIP_CRITICAL;
-+ return 0;
-+}
-+
-+static int imx_get_crit_temp(struct thermal_zone_device *tz,
-+ unsigned long *temp)
-+{
-+ *temp = IMX_TEMP_CRITICAL;
-+ return 0;
-+}
-+
-+static int imx_get_trip_temp(struct thermal_zone_device *tz, int trip,
-+ unsigned long *temp)
-+{
-+ *temp = (trip == IMX_TRIP_PASSIVE) ? IMX_TEMP_PASSIVE :
-+ IMX_TEMP_CRITICAL;
-+ return 0;
-+}
-+
-+static int imx_bind(struct thermal_zone_device *tz,
-+ struct thermal_cooling_device *cdev)
-+{
-+ int ret;
-+
-+ ret = thermal_zone_bind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev,
-+ THERMAL_NO_LIMIT,
-+ THERMAL_NO_LIMIT);
-+ if (ret) {
-+ dev_err(&tz->device,
-+ "binding zone %s with cdev %s failed:%d\n",
-+ tz->type, cdev->type, ret);
-+ return ret;
-+ }
-+
-+ return 0;
-+}
-+
-+static int imx_unbind(struct thermal_zone_device *tz,
-+ struct thermal_cooling_device *cdev)
-+{
-+ int ret;
-+
-+ ret = thermal_zone_unbind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev);
-+ if (ret) {
-+ dev_err(&tz->device,
-+ "unbinding zone %s with cdev %s failed:%d\n",
-+ tz->type, cdev->type, ret);
-+ return ret;
-+ }
-+
-+ return 0;
-+}
-+
-+static const struct thermal_zone_device_ops imx_tz_ops = {
-+ .bind = imx_bind,
-+ .unbind = imx_unbind,
-+ .get_temp = imx_get_temp,
-+ .get_mode = imx_get_mode,
-+ .set_mode = imx_set_mode,
-+ .get_trip_type = imx_get_trip_type,
-+ .get_trip_temp = imx_get_trip_temp,
-+ .get_crit_temp = imx_get_crit_temp,
-+};
-+
-+static int imx_get_sensor_data(struct platform_device *pdev)
-+{
-+ struct imx_thermal_data *data = platform_get_drvdata(pdev);
-+ struct regmap *map;
-+ int t1, t2, n1, n2;
-+ int ret;
-+ u32 val;
-+
-+ map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
-+ "fsl,tempmon-data");
-+ if (IS_ERR(map)) {
-+ ret = PTR_ERR(map);
-+ dev_err(&pdev->dev, "failed to get sensor regmap: %d\n", ret);
-+ return ret;
-+ }
-+
-+ ret = regmap_read(map, OCOTP_ANA1, &val);
-+ if (ret) {
-+ dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
-+ return ret;
-+ }
-+
-+ if (val == 0 || val == ~0) {
-+ dev_err(&pdev->dev, "invalid sensor calibration data\n");
-+ return -EINVAL;
-+ }
-+
-+ /*
-+ * Sensor data layout:
-+ * [31:20] - sensor value @ 25C
-+ * [19:8] - sensor value of hot
-+ * [7:0] - hot temperature value
-+ */
-+ n1 = val >> 20;
-+ n2 = (val & 0xfff00) >> 8;
-+ t2 = val & 0xff;
-+ t1 = 25; /* t1 always 25C */
-+
-+ /*
-+ * Derived from linear interpolation,
-+ * Tmeas = T2 + (Nmeas - N2) * (T1 - T2) / (N1 - N2)
-+ * We want to reduce this down to the minimum computation necessary
-+ * for each temperature read. Also, we want Tmeas in millicelsius
-+ * and we don't want to lose precision from integer division. So...
-+ * milli_Tmeas = 1000 * T2 + 1000 * (Nmeas - N2) * (T1 - T2) / (N1 - N2)
-+ * Let constant c1 = 1000 * (T1 - T2) / (N1 - N2)
-+ * milli_Tmeas = (1000 * T2) + c1 * (Nmeas - N2)
-+ * milli_Tmeas = (1000 * T2) + (c1 * Nmeas) - (c1 * N2)
-+ * Let constant c2 = (1000 * T2) - (c1 * N2)
-+ * milli_Tmeas = c2 + (c1 * Nmeas)
-+ */
-+ data->c1 = 1000 * (t1 - t2) / (n1 - n2);
-+ data->c2 = 1000 * t2 - data->c1 * n2;
-+
-+ return 0;
-+}
-+
-+static int imx_thermal_probe(struct platform_device *pdev)
-+{
-+ struct imx_thermal_data *data;
-+ struct cpumask clip_cpus;
-+ struct regmap *map;
-+ int ret;
-+
-+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
-+ if (!data)
-+ return -ENOMEM;
-+
-+ map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "fsl,tempmon");
-+ if (IS_ERR(map)) {
-+ ret = PTR_ERR(map);
-+ dev_err(&pdev->dev, "failed to get tempmon regmap: %d\n", ret);
-+ return ret;
-+ }
-+ data->tempmon = map;
-+
-+ platform_set_drvdata(pdev, data);
-+
-+ ret = imx_get_sensor_data(pdev);
-+ if (ret) {
-+ dev_err(&pdev->dev, "failed to get sensor data\n");
-+ return ret;
-+ }
-+
-+ /* Make sure sensor is in known good state for measurements */
-+ regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
-+ regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
-+ regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ);
-+ regmap_write(map, MISC0 + REG_SET, MISC0_REFTOP_SELBIASOFF);
-+ regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
-+
-+ cpumask_set_cpu(0, &clip_cpus);
-+ data->cdev = cpufreq_cooling_register(&clip_cpus);
-+ if (IS_ERR(data->cdev)) {
-+ ret = PTR_ERR(data->cdev);
-+ dev_err(&pdev->dev,
-+ "failed to register cpufreq cooling device: %d\n", ret);
-+ return ret;
-+ }
-+
-+ data->tz = thermal_zone_device_register("imx_thermal_zone",
-+ IMX_TRIP_NUM, 0, data,
-+ &imx_tz_ops, NULL,
-+ IMX_PASSIVE_DELAY,
-+ IMX_POLLING_DELAY);
-+ if (IS_ERR(data->tz)) {
-+ ret = PTR_ERR(data->tz);
-+ dev_err(&pdev->dev,
-+ "failed to register thermal zone device %d\n", ret);
-+ cpufreq_cooling_unregister(data->cdev);
-+ return ret;
-+ }
-+
-+ data->mode = THERMAL_DEVICE_ENABLED;
-+
-+ return 0;
-+}
-+
-+static int imx_thermal_remove(struct platform_device *pdev)
-+{
-+ struct imx_thermal_data *data = platform_get_drvdata(pdev);
-+
-+ thermal_zone_device_unregister(data->tz);
-+ cpufreq_cooling_unregister(data->cdev);
-+
-+ return 0;
-+}
-+
-+#ifdef CONFIG_PM_SLEEP
-+static int imx_thermal_suspend(struct device *dev)
-+{
-+ struct imx_thermal_data *data = dev_get_drvdata(dev);
-+ struct regmap *map = data->tempmon;
-+ u32 val;
-+
-+ regmap_read(map, TEMPSENSE0, &val);
-+ if ((val & TEMPSENSE0_POWER_DOWN) == 0) {
-+ /*
-+ * If a measurement is taking place, wait for a long enough
-+ * time for it to finish, and then check again. If it still
-+ * does not finish, something must go wrong.
-+ */
-+ udelay(50);
-+ regmap_read(map, TEMPSENSE0, &val);
-+ if ((val & TEMPSENSE0_POWER_DOWN) == 0)
-+ return -ETIMEDOUT;
-+ }
-+
-+ return 0;
-+}
-+
-+static int imx_thermal_resume(struct device *dev)
-+{
-+ /* Nothing to do for now */
-+ return 0;
-+}
-+#endif
-+
-+static SIMPLE_DEV_PM_OPS(imx_thermal_pm_ops,
-+ imx_thermal_suspend, imx_thermal_resume);
-+
-+static const struct of_device_id of_imx_thermal_match[] = {
-+ { .compatible = "fsl,imx6q-tempmon", },
-+ { /* end */ }
-+};
-+
-+static struct platform_driver imx_thermal = {
-+ .driver = {
-+ .name = "imx_thermal",
-+ .owner = THIS_MODULE,
-+ .pm = &imx_thermal_pm_ops,
-+ .of_match_table = of_imx_thermal_match,
-+ },
-+ .probe = imx_thermal_probe,
-+ .remove = imx_thermal_remove,
-+};
-+module_platform_driver(imx_thermal);
-+
-+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
-+MODULE_DESCRIPTION("Thermal driver for Freescale i.MX SoCs");
-+MODULE_LICENSE("GPL v2");
-+MODULE_ALIAS("platform:imx-thermal");
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