diff options
Diffstat (limited to 'target/linux/generic')
7 files changed, 1339 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.4/086-0001-thermal-of-thermal-Add-devm-version-of-thermal_zone_.patch b/target/linux/generic/patches-4.4/086-0001-thermal-of-thermal-Add-devm-version-of-thermal_zone_.patch new file mode 100644 index 0000000..b551bac --- /dev/null +++ b/target/linux/generic/patches-4.4/086-0001-thermal-of-thermal-Add-devm-version-of-thermal_zone_.patch @@ -0,0 +1,143 @@ +From e498b4984db82b4ba3ceea7dba813222a31e9c2e Mon Sep 17 00:00:00 2001 +From: Laxman Dewangan <ldewangan@nvidia.com> +Date: Wed, 9 Mar 2016 18:40:06 +0530 +Subject: [PATCH] thermal: of-thermal: Add devm version of + thermal_zone_of_sensor_register + +Add resource managed version of thermal_zone_of_sensor_register() and +thermal_zone_of_sensor_unregister(). + +This helps in reducing the code size in error path, remove of +driver remove callbacks and making proper sequence for deallocations. + +Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> +Signed-off-by: Eduardo Valentin <edubezval@gmail.com> +--- + drivers/thermal/of-thermal.c | 81 ++++++++++++++++++++++++++++++++++++++++++++ + include/linux/thermal.h | 18 ++++++++++ + 2 files changed, 99 insertions(+) + +--- a/drivers/thermal/of-thermal.c ++++ b/drivers/thermal/of-thermal.c +@@ -559,6 +559,87 @@ void thermal_zone_of_sensor_unregister(s + } + EXPORT_SYMBOL_GPL(thermal_zone_of_sensor_unregister); + ++static void devm_thermal_zone_of_sensor_release(struct device *dev, void *res) ++{ ++ thermal_zone_of_sensor_unregister(dev, ++ *(struct thermal_zone_device **)res); ++} ++ ++static int devm_thermal_zone_of_sensor_match(struct device *dev, void *res, ++ void *data) ++{ ++ struct thermal_zone_device **r = res; ++ ++ if (WARN_ON(!r || !*r)) ++ return 0; ++ ++ return *r == data; ++} ++ ++/** ++ * devm_thermal_zone_of_sensor_register - Resource managed version of ++ * thermal_zone_of_sensor_register() ++ * @dev: a valid struct device pointer of a sensor device. Must contain ++ * a valid .of_node, for the sensor node. ++ * @sensor_id: a sensor identifier, in case the sensor IP has more ++ * than one sensors ++ * @data: a private pointer (owned by the caller) that will be passed ++ * back, when a temperature reading is needed. ++ * @ops: struct thermal_zone_of_device_ops *. Must contain at least .get_temp. ++ * ++ * Refer thermal_zone_of_sensor_register() for more details. ++ * ++ * Return: On success returns a valid struct thermal_zone_device, ++ * otherwise, it returns a corresponding ERR_PTR(). Caller must ++ * check the return value with help of IS_ERR() helper. ++ * Registered hermal_zone_device device will automatically be ++ * released when device is unbounded. ++ */ ++struct thermal_zone_device *devm_thermal_zone_of_sensor_register( ++ struct device *dev, int sensor_id, ++ void *data, const struct thermal_zone_of_device_ops *ops) ++{ ++ struct thermal_zone_device **ptr, *tzd; ++ ++ ptr = devres_alloc(devm_thermal_zone_of_sensor_release, sizeof(*ptr), ++ GFP_KERNEL); ++ if (!ptr) ++ return ERR_PTR(-ENOMEM); ++ ++ tzd = thermal_zone_of_sensor_register(dev, sensor_id, data, ops); ++ if (IS_ERR(tzd)) { ++ devres_free(ptr); ++ return tzd; ++ } ++ ++ *ptr = tzd; ++ devres_add(dev, ptr); ++ ++ return tzd; ++} ++EXPORT_SYMBOL_GPL(devm_thermal_zone_of_sensor_register); ++ ++/** ++ * devm_thermal_zone_of_sensor_unregister - Resource managed version of ++ * thermal_zone_of_sensor_unregister(). ++ * @dev: Device for which which resource was allocated. ++ * @tzd: a pointer to struct thermal_zone_device where the sensor is registered. ++ * ++ * This function removes the sensor callbacks and private data from the ++ * thermal zone device registered with devm_thermal_zone_of_sensor_register() ++ * API. It will also silent the zone by remove the .get_temp() and .get_trend() ++ * thermal zone device callbacks. ++ * Normally this function will not need to be called and the resource ++ * management code will ensure that the resource is freed. ++ */ ++void devm_thermal_zone_of_sensor_unregister(struct device *dev, ++ struct thermal_zone_device *tzd) ++{ ++ WARN_ON(devres_release(dev, devm_thermal_zone_of_sensor_release, ++ devm_thermal_zone_of_sensor_match, tzd)); ++} ++EXPORT_SYMBOL_GPL(devm_thermal_zone_of_sensor_unregister); ++ + /*** functions parsing device tree nodes ***/ + + /** +--- a/include/linux/thermal.h ++++ b/include/linux/thermal.h +@@ -364,6 +364,11 @@ thermal_zone_of_sensor_register(struct d + const struct thermal_zone_of_device_ops *ops); + void thermal_zone_of_sensor_unregister(struct device *dev, + struct thermal_zone_device *tz); ++struct thermal_zone_device *devm_thermal_zone_of_sensor_register( ++ struct device *dev, int id, void *data, ++ const struct thermal_zone_of_device_ops *ops); ++void devm_thermal_zone_of_sensor_unregister(struct device *dev, ++ struct thermal_zone_device *tz); + #else + static inline struct thermal_zone_device * + thermal_zone_of_sensor_register(struct device *dev, int id, void *data, +@@ -378,6 +383,19 @@ void thermal_zone_of_sensor_unregister(s + { + } + ++static inline struct thermal_zone_device *devm_thermal_zone_of_sensor_register( ++ struct device *dev, int id, void *data, ++ const struct thermal_zone_of_device_ops *ops) ++{ ++ return ERR_PTR(-ENODEV); ++} ++ ++static inline ++void devm_thermal_zone_of_sensor_unregister(struct device *dev, ++ struct thermal_zone_device *tz) ++{ ++} ++ + #endif + + #if IS_ENABLED(CONFIG_THERMAL) diff --git a/target/linux/generic/patches-4.4/086-0002-thermal-core-export-apis-to-get-slope-and-offset.patch b/target/linux/generic/patches-4.4/086-0002-thermal-core-export-apis-to-get-slope-and-offset.patch new file mode 100644 index 0000000..3fbe5f5 --- /dev/null +++ b/target/linux/generic/patches-4.4/086-0002-thermal-core-export-apis-to-get-slope-and-offset.patch @@ -0,0 +1,101 @@ +From 4a7069a32c99a81950de035535b0a064dcceaeba Mon Sep 17 00:00:00 2001 +From: Rajendra Nayak <rnayak@codeaurora.org> +Date: Thu, 5 May 2016 14:21:42 +0530 +Subject: [PATCH] thermal: core: export apis to get slope and offset + +Add apis for platform thermal drivers to query for slope and offset +attributes, which might be needed for temperature calculations. + +Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> +Signed-off-by: Eduardo Valentin <edubezval@gmail.com> +Signed-off-by: Zhang Rui <rui.zhang@intel.com> +--- + Documentation/thermal/sysfs-api.txt | 12 ++++++++++++ + drivers/thermal/thermal_core.c | 30 ++++++++++++++++++++++++++++++ + include/linux/thermal.h | 8 ++++++++ + 3 files changed, 50 insertions(+) + +--- a/Documentation/thermal/sysfs-api.txt ++++ b/Documentation/thermal/sysfs-api.txt +@@ -72,6 +72,18 @@ temperature) and throttle appropriate de + It deletes the corresponding entry form /sys/class/thermal folder and + unbind all the thermal cooling devices it uses. + ++1.1.7 int thermal_zone_get_slope(struct thermal_zone_device *tz) ++ ++ This interface is used to read the slope attribute value ++ for the thermal zone device, which might be useful for platform ++ drivers for temperature calculations. ++ ++1.1.8 int thermal_zone_get_offset(struct thermal_zone_device *tz) ++ ++ This interface is used to read the offset attribute value ++ for the thermal zone device, which might be useful for platform ++ drivers for temperature calculations. ++ + 1.2 thermal cooling device interface + 1.2.1 struct thermal_cooling_device *thermal_cooling_device_register(char *name, + void *devdata, struct thermal_cooling_device_ops *) +--- a/drivers/thermal/thermal_core.c ++++ b/drivers/thermal/thermal_core.c +@@ -2061,6 +2061,36 @@ exit: + } + EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); + ++/** ++ * thermal_zone_get_slope - return the slope attribute of the thermal zone ++ * @tz: thermal zone device with the slope attribute ++ * ++ * Return: If the thermal zone device has a slope attribute, return it, else ++ * return 1. ++ */ ++int thermal_zone_get_slope(struct thermal_zone_device *tz) ++{ ++ if (tz && tz->tzp) ++ return tz->tzp->slope; ++ return 1; ++} ++EXPORT_SYMBOL_GPL(thermal_zone_get_slope); ++ ++/** ++ * thermal_zone_get_offset - return the offset attribute of the thermal zone ++ * @tz: thermal zone device with the offset attribute ++ * ++ * Return: If the thermal zone device has a offset attribute, return it, else ++ * return 0. ++ */ ++int thermal_zone_get_offset(struct thermal_zone_device *tz) ++{ ++ if (tz && tz->tzp) ++ return tz->tzp->offset; ++ return 0; ++} ++EXPORT_SYMBOL_GPL(thermal_zone_get_offset); ++ + #ifdef CONFIG_NET + static const struct genl_multicast_group thermal_event_mcgrps[] = { + { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, +--- a/include/linux/thermal.h ++++ b/include/linux/thermal.h +@@ -432,6 +432,8 @@ thermal_of_cooling_device_register(struc + void thermal_cooling_device_unregister(struct thermal_cooling_device *); + struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name); + int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp); ++int thermal_zone_get_slope(struct thermal_zone_device *tz); ++int thermal_zone_get_offset(struct thermal_zone_device *tz); + + int get_tz_trend(struct thermal_zone_device *, int); + struct thermal_instance *get_thermal_instance(struct thermal_zone_device *, +@@ -489,6 +491,12 @@ static inline struct thermal_zone_device + static inline int thermal_zone_get_temp( + struct thermal_zone_device *tz, int *temp) + { return -ENODEV; } ++static inline int thermal_zone_get_slope( ++ struct thermal_zone_device *tz) ++{ return -ENODEV; } ++static inline int thermal_zone_get_offset( ++ struct thermal_zone_device *tz) ++{ return -ENODEV; } + static inline int get_tz_trend(struct thermal_zone_device *tz, int trip) + { return -ENODEV; } + static inline struct thermal_instance * diff --git a/target/linux/generic/patches-4.4/086-0003-thermal-bcm2835-add-thermal-driver-for-bcm2835-SoC.patch b/target/linux/generic/patches-4.4/086-0003-thermal-bcm2835-add-thermal-driver-for-bcm2835-SoC.patch new file mode 100644 index 0000000..d606804 --- /dev/null +++ b/target/linux/generic/patches-4.4/086-0003-thermal-bcm2835-add-thermal-driver-for-bcm2835-SoC.patch @@ -0,0 +1,365 @@ +From bcb7dd9ef206f7d646ed8dac6fe7772083714253 Mon Sep 17 00:00:00 2001 +From: Stefan Wahren <stefan.wahren@i2se.com> +Date: Fri, 31 Mar 2017 20:03:06 +0000 +Subject: [PATCH] thermal: bcm2835: add thermal driver for bcm2835 SoC +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Add basic thermal driver for bcm2835 SoC. + +This driver currently make sure that tsense HW block is set up +correctly. + +Tested-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: Martin Sperl <kernel@martin.sperl.org> +Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> +Acked-by: Eric Anholt <eric@anholt.net> +Acked-by: Eduardo Valentin <edubezval@gmail.com> +Signed-off-by: Eduardo Valentin <edubezval@gmail.com> +--- + drivers/thermal/Kconfig | 8 + + drivers/thermal/Makefile | 1 + + drivers/thermal/bcm2835_thermal.c | 314 ++++++++++++++++++++++++++++++++++++++ + 3 files changed, 323 insertions(+) + create mode 100644 drivers/thermal/bcm2835_thermal.c + +--- a/drivers/thermal/Kconfig ++++ b/drivers/thermal/Kconfig +@@ -391,4 +391,12 @@ config QCOM_SPMI_TEMP_ALARM + real time die temperature if an ADC is present or an estimate of the + temperature based upon the over temperature stage value. + ++config BCM2835_THERMAL ++ tristate "Thermal sensors on bcm2835 SoC" ++ depends on ARCH_BCM2835 || COMPILE_TEST ++ depends on HAS_IOMEM ++ depends on THERMAL_OF ++ help ++ Support for thermal sensors on Broadcom bcm2835 SoCs. ++ + endif +--- a/drivers/thermal/Makefile ++++ b/drivers/thermal/Makefile +@@ -48,3 +48,4 @@ obj-$(CONFIG_INTEL_PCH_THERMAL) += intel + obj-$(CONFIG_ST_THERMAL) += st/ + obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o + obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o ++obj-$(CONFIG_BCM2835_THERMAL) += bcm2835_thermal.o +--- /dev/null ++++ b/drivers/thermal/bcm2835_thermal.c +@@ -0,0 +1,314 @@ ++/* ++ * Driver for Broadcom BCM2835 SoC temperature sensor ++ * ++ * Copyright (C) 2016 Martin Sperl ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * 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/clk.h> ++#include <linux/debugfs.h> ++#include <linux/device.h> ++#include <linux/err.h> ++#include <linux/io.h> ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/of.h> ++#include <linux/of_address.h> ++#include <linux/of_device.h> ++#include <linux/platform_device.h> ++#include <linux/thermal.h> ++ ++#define BCM2835_TS_TSENSCTL 0x00 ++#define BCM2835_TS_TSENSSTAT 0x04 ++ ++#define BCM2835_TS_TSENSCTL_PRWDW BIT(0) ++#define BCM2835_TS_TSENSCTL_RSTB BIT(1) ++ ++/* ++ * bandgap reference voltage in 6 mV increments ++ * 000b = 1178 mV, 001b = 1184 mV, ... 111b = 1220 mV ++ */ ++#define BCM2835_TS_TSENSCTL_CTRL_BITS 3 ++#define BCM2835_TS_TSENSCTL_CTRL_SHIFT 2 ++#define BCM2835_TS_TSENSCTL_CTRL_MASK \ ++ GENMASK(BCM2835_TS_TSENSCTL_CTRL_BITS + \ ++ BCM2835_TS_TSENSCTL_CTRL_SHIFT - 1, \ ++ BCM2835_TS_TSENSCTL_CTRL_SHIFT) ++#define BCM2835_TS_TSENSCTL_CTRL_DEFAULT 1 ++#define BCM2835_TS_TSENSCTL_EN_INT BIT(5) ++#define BCM2835_TS_TSENSCTL_DIRECT BIT(6) ++#define BCM2835_TS_TSENSCTL_CLR_INT BIT(7) ++#define BCM2835_TS_TSENSCTL_THOLD_SHIFT 8 ++#define BCM2835_TS_TSENSCTL_THOLD_BITS 10 ++#define BCM2835_TS_TSENSCTL_THOLD_MASK \ ++ GENMASK(BCM2835_TS_TSENSCTL_THOLD_BITS + \ ++ BCM2835_TS_TSENSCTL_THOLD_SHIFT - 1, \ ++ BCM2835_TS_TSENSCTL_THOLD_SHIFT) ++/* ++ * time how long the block to be asserted in reset ++ * which based on a clock counter (TSENS clock assumed) ++ */ ++#define BCM2835_TS_TSENSCTL_RSTDELAY_SHIFT 18 ++#define BCM2835_TS_TSENSCTL_RSTDELAY_BITS 8 ++#define BCM2835_TS_TSENSCTL_REGULEN BIT(26) ++ ++#define BCM2835_TS_TSENSSTAT_DATA_BITS 10 ++#define BCM2835_TS_TSENSSTAT_DATA_SHIFT 0 ++#define BCM2835_TS_TSENSSTAT_DATA_MASK \ ++ GENMASK(BCM2835_TS_TSENSSTAT_DATA_BITS + \ ++ BCM2835_TS_TSENSSTAT_DATA_SHIFT - 1, \ ++ BCM2835_TS_TSENSSTAT_DATA_SHIFT) ++#define BCM2835_TS_TSENSSTAT_VALID BIT(10) ++#define BCM2835_TS_TSENSSTAT_INTERRUPT BIT(11) ++ ++struct bcm2835_thermal_data { ++ struct thermal_zone_device *tz; ++ void __iomem *regs; ++ struct clk *clk; ++ struct dentry *debugfsdir; ++}; ++ ++static int bcm2835_thermal_adc2temp(u32 adc, int offset, int slope) ++{ ++ return offset + slope * adc; ++} ++ ++static int bcm2835_thermal_temp2adc(int temp, int offset, int slope) ++{ ++ temp -= offset; ++ temp /= slope; ++ ++ if (temp < 0) ++ temp = 0; ++ if (temp >= BIT(BCM2835_TS_TSENSSTAT_DATA_BITS)) ++ temp = BIT(BCM2835_TS_TSENSSTAT_DATA_BITS) - 1; ++ ++ return temp; ++} ++ ++static int bcm2835_thermal_get_temp(void *d, int *temp) ++{ ++ struct bcm2835_thermal_data *data = d; ++ u32 val = readl(data->regs + BCM2835_TS_TSENSSTAT); ++ ++ if (!(val & BCM2835_TS_TSENSSTAT_VALID)) ++ return -EIO; ++ ++ val &= BCM2835_TS_TSENSSTAT_DATA_MASK; ++ ++ *temp = bcm2835_thermal_adc2temp( ++ val, ++ thermal_zone_get_offset(data->tz), ++ thermal_zone_get_slope(data->tz)); ++ ++ return 0; ++} ++ ++static const struct debugfs_reg32 bcm2835_thermal_regs[] = { ++ { ++ .name = "ctl", ++ .offset = 0 ++ }, ++ { ++ .name = "stat", ++ .offset = 4 ++ } ++}; ++ ++static void bcm2835_thermal_debugfs(struct platform_device *pdev) ++{ ++ struct thermal_zone_device *tz = platform_get_drvdata(pdev); ++ struct bcm2835_thermal_data *data = tz->devdata; ++ struct debugfs_regset32 *regset; ++ ++ data->debugfsdir = debugfs_create_dir("bcm2835_thermal", NULL); ++ if (!data->debugfsdir) ++ return; ++ ++ regset = devm_kzalloc(&pdev->dev, sizeof(*regset), GFP_KERNEL); ++ if (!regset) ++ return; ++ ++ regset->regs = bcm2835_thermal_regs; ++ regset->nregs = ARRAY_SIZE(bcm2835_thermal_regs); ++ regset->base = data->regs; ++ ++ debugfs_create_regset32("regset", 0444, data->debugfsdir, regset); ++} ++ ++static struct thermal_zone_of_device_ops bcm2835_thermal_ops = { ++ .get_temp = bcm2835_thermal_get_temp, ++}; ++ ++/* ++ * Note: as per Raspberry Foundation FAQ ++ * (https://www.raspberrypi.org/help/faqs/#performanceOperatingTemperature) ++ * the recommended temperature range for the SoC -40C to +85C ++ * so the trip limit is set to 80C. ++ * this applies to all the BCM283X SoC ++ */ ++ ++static const struct of_device_id bcm2835_thermal_of_match_table[] = { ++ { ++ .compatible = "brcm,bcm2835-thermal", ++ }, ++ { ++ .compatible = "brcm,bcm2836-thermal", ++ }, ++ { ++ .compatible = "brcm,bcm2837-thermal", ++ }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, bcm2835_thermal_of_match_table); ++ ++static int bcm2835_thermal_probe(struct platform_device *pdev) ++{ ++ const struct of_device_id *match; ++ struct thermal_zone_device *tz; ++ struct bcm2835_thermal_data *data; ++ struct resource *res; ++ int err = 0; ++ u32 val; ++ unsigned long rate; ++ ++ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); ++ if (!data) ++ return -ENOMEM; ++ ++ match = of_match_device(bcm2835_thermal_of_match_table, ++ &pdev->dev); ++ if (!match) ++ return -EINVAL; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ data->regs = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(data->regs)) { ++ err = PTR_ERR(data->regs); ++ dev_err(&pdev->dev, "Could not get registers: %d\n", err); ++ return err; ++ } ++ ++ data->clk = devm_clk_get(&pdev->dev, NULL); ++ if (IS_ERR(data->clk)) { ++ err = PTR_ERR(data->clk); ++ if (err != -EPROBE_DEFER) ++ dev_err(&pdev->dev, "Could not get clk: %d\n", err); ++ return err; ++ } ++ ++ err = clk_prepare_enable(data->clk); ++ if (err) ++ return err; ++ ++ rate = clk_get_rate(data->clk); ++ if ((rate < 1920000) || (rate > 5000000)) ++ dev_warn(&pdev->dev, ++ "Clock %pCn running at %pCr Hz is outside of the recommended range: 1.92 to 5MHz\n", ++ data->clk, data->clk); ++ ++ /* register of thermal sensor and get info from DT */ ++ tz = thermal_zone_of_sensor_register(&pdev->dev, 0, data, ++ &bcm2835_thermal_ops); ++ if (IS_ERR(tz)) { ++ err = PTR_ERR(tz); ++ dev_err(&pdev->dev, ++ "Failed to register the thermal device: %d\n", ++ err); ++ goto err_clk; ++ } ++ ++ /* ++ * right now the FW does set up the HW-block, so we are not ++ * touching the configuration registers. ++ * But if the HW is not enabled, then set it up ++ * using "sane" values used by the firmware right now. ++ */ ++ val = readl(data->regs + BCM2835_TS_TSENSCTL); ++ if (!(val & BCM2835_TS_TSENSCTL_RSTB)) { ++ int trip_temp, offset, slope; ++ ++ slope = thermal_zone_get_slope(tz); ++ offset = thermal_zone_get_offset(tz); ++ /* ++ * For now we deal only with critical, otherwise ++ * would need to iterate ++ */ ++ err = tz->ops->get_trip_temp(tz, 0, &trip_temp); ++ if (err < 0) { ++ err = PTR_ERR(tz); ++ dev_err(&pdev->dev, ++ "Not able to read trip_temp: %d\n", ++ err); ++ goto err_tz; ++ } ++ ++ /* set bandgap reference voltage and enable voltage regulator */ ++ val = (BCM2835_TS_TSENSCTL_CTRL_DEFAULT << ++ BCM2835_TS_TSENSCTL_CTRL_SHIFT) | ++ BCM2835_TS_TSENSCTL_REGULEN; ++ ++ /* use the recommended reset duration */ ++ val |= (0xFE << BCM2835_TS_TSENSCTL_RSTDELAY_SHIFT); ++ ++ /* trip_adc value from info */ ++ val |= bcm2835_thermal_temp2adc(trip_temp, ++ offset, ++ slope) ++ << BCM2835_TS_TSENSCTL_THOLD_SHIFT; ++ ++ /* write the value back to the register as 2 steps */ ++ writel(val, data->regs + BCM2835_TS_TSENSCTL); ++ val |= BCM2835_TS_TSENSCTL_RSTB; ++ writel(val, data->regs + BCM2835_TS_TSENSCTL); ++ } ++ ++ data->tz = tz; ++ ++ platform_set_drvdata(pdev, tz); ++ ++ bcm2835_thermal_debugfs(pdev); ++ ++ return 0; ++err_tz: ++ thermal_zone_of_sensor_unregister(&pdev->dev, tz); ++err_clk: ++ clk_disable_unprepare(data->clk); ++ ++ return err; ++} ++ ++static int bcm2835_thermal_remove(struct platform_device *pdev) ++{ ++ struct thermal_zone_device *tz = platform_get_drvdata(pdev); ++ struct bcm2835_thermal_data *data = tz->devdata; ++ ++ debugfs_remove_recursive(data->debugfsdir); ++ thermal_zone_of_sensor_unregister(&pdev->dev, tz); ++ clk_disable_unprepare(data->clk); ++ ++ return 0; ++} ++ ++static struct platform_driver bcm2835_thermal_driver = { ++ .probe = bcm2835_thermal_probe, ++ .remove = bcm2835_thermal_remove, ++ .driver = { ++ .name = "bcm2835_thermal", ++ .of_match_table = bcm2835_thermal_of_match_table, ++ }, ++}; ++module_platform_driver(bcm2835_thermal_driver); ++ ++MODULE_AUTHOR("Martin Sperl"); ++MODULE_DESCRIPTION("Thermal driver for bcm2835 chip"); ++MODULE_LICENSE("GPL"); diff --git a/target/linux/generic/patches-4.4/086-0004-thermal-broadcom-add-Northstar-thermal-driver.patch b/target/linux/generic/patches-4.4/086-0004-thermal-broadcom-add-Northstar-thermal-driver.patch new file mode 100644 index 0000000..1821096 --- /dev/null +++ b/target/linux/generic/patches-4.4/086-0004-thermal-broadcom-add-Northstar-thermal-driver.patch @@ -0,0 +1,173 @@ +From a94cb7eeecc4104a6874339f90c5d0647359c102 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Mon, 3 Apr 2017 17:48:29 +0200 +Subject: [PATCH] thermal: broadcom: add Northstar thermal driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Northstar is a SoC family commonly used in home routers. This commit +adds a driver for checking CPU temperature. As Northstar Plus seems to +also have this IP block this new symbol gets ARCH_BCM_IPROC dependency. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: Jon Mason <jon.mason@broadcom.com> +Signed-off-by: Eduardo Valentin <edubezval@gmail.com> +--- + drivers/thermal/Kconfig | 5 ++ + drivers/thermal/Makefile | 1 + + drivers/thermal/broadcom/Kconfig | 8 +++ + drivers/thermal/broadcom/Makefile | 1 + + drivers/thermal/broadcom/ns-thermal.c | 105 ++++++++++++++++++++++++++++++++++ + 5 files changed, 120 insertions(+) + create mode 100644 drivers/thermal/broadcom/Kconfig + create mode 100644 drivers/thermal/broadcom/Makefile + create mode 100644 drivers/thermal/broadcom/ns-thermal.c + +--- a/drivers/thermal/Kconfig ++++ b/drivers/thermal/Kconfig +@@ -365,6 +365,11 @@ config INTEL_PCH_THERMAL + Thermal reporting device will provide temperature reading, + programmable trip points and other information. + ++menu "Broadcom thermal drivers" ++depends on ARCH_BCM || COMPILE_TEST ++source "drivers/thermal/broadcom/Kconfig" ++endmenu ++ + menu "Texas Instruments thermal drivers" + depends on ARCH_HAS_BANDGAP || COMPILE_TEST + source "drivers/thermal/ti-soc-thermal/Kconfig" +--- a/drivers/thermal/Makefile ++++ b/drivers/thermal/Makefile +@@ -26,6 +26,7 @@ thermal_sys-$(CONFIG_CLOCK_THERMAL) += c + thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o + + # platform thermal drivers ++obj-y += broadcom/ + obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o + obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o + obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o +--- /dev/null ++++ b/drivers/thermal/broadcom/Kconfig +@@ -0,0 +1,8 @@ ++config BCM_NS_THERMAL ++ tristate "Northstar thermal driver" ++ depends on ARCH_BCM_IPROC || COMPILE_TEST ++ help ++ Northstar is a family of SoCs that includes e.g. BCM4708, BCM47081, ++ BCM4709 and BCM47094. It contains DMU (Device Management Unit) block ++ with a thermal sensor that allows checking CPU temperature. This ++ driver provides support for it. +--- /dev/null ++++ b/drivers/thermal/broadcom/Makefile +@@ -0,0 +1 @@ ++obj-$(CONFIG_BCM_NS_THERMAL) += ns-thermal.o +--- /dev/null ++++ b/drivers/thermal/broadcom/ns-thermal.c +@@ -0,0 +1,105 @@ ++/* ++ * Copyright (C) 2017 Rafał Miłecki <rafal@milecki.pl> ++ * ++ * 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/module.h> ++#include <linux/of_address.h> ++#include <linux/platform_device.h> ++#include <linux/thermal.h> ++ ++#define PVTMON_CONTROL0 0x00 ++#define PVTMON_CONTROL0_SEL_MASK 0x0000000e ++#define PVTMON_CONTROL0_SEL_TEMP_MONITOR 0x00000000 ++#define PVTMON_CONTROL0_SEL_TEST_MODE 0x0000000e ++#define PVTMON_STATUS 0x08 ++ ++struct ns_thermal { ++ struct thermal_zone_device *tz; ++ void __iomem *pvtmon; ++}; ++ ++static int ns_thermal_get_temp(void *data, int *temp) ++{ ++ struct ns_thermal *ns_thermal = data; ++ int offset = thermal_zone_get_offset(ns_thermal->tz); ++ int slope = thermal_zone_get_slope(ns_thermal->tz); ++ u32 val; ++ ++ val = readl(ns_thermal->pvtmon + PVTMON_CONTROL0); ++ if ((val & PVTMON_CONTROL0_SEL_MASK) != PVTMON_CONTROL0_SEL_TEMP_MONITOR) { ++ /* Clear current mode selection */ ++ val &= ~PVTMON_CONTROL0_SEL_MASK; ++ ++ /* Set temp monitor mode (it's the default actually) */ ++ val |= PVTMON_CONTROL0_SEL_TEMP_MONITOR; ++ ++ writel(val, ns_thermal->pvtmon + PVTMON_CONTROL0); ++ } ++ ++ val = readl(ns_thermal->pvtmon + PVTMON_STATUS); ++ *temp = slope * val + offset; ++ ++ return 0; ++} ++ ++static const struct thermal_zone_of_device_ops ns_thermal_ops = { ++ .get_temp = ns_thermal_get_temp, ++}; ++ ++static int ns_thermal_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct ns_thermal *ns_thermal; ++ ++ ns_thermal = devm_kzalloc(dev, sizeof(*ns_thermal), GFP_KERNEL); ++ if (!ns_thermal) ++ return -ENOMEM; ++ ++ ns_thermal->pvtmon = of_iomap(dev_of_node(dev), 0); ++ if (WARN_ON(!ns_thermal->pvtmon)) ++ return -ENOENT; ++ ++ ns_thermal->tz = devm_thermal_zone_of_sensor_register(dev, 0, ++ ns_thermal, ++ &ns_thermal_ops); ++ if (IS_ERR(ns_thermal->tz)) { ++ iounmap(ns_thermal->pvtmon); ++ return PTR_ERR(ns_thermal->tz); ++ } ++ ++ platform_set_drvdata(pdev, ns_thermal); ++ ++ return 0; ++} ++ ++static int ns_thermal_remove(struct platform_device *pdev) ++{ ++ struct ns_thermal *ns_thermal = platform_get_drvdata(pdev); ++ ++ iounmap(ns_thermal->pvtmon); ++ ++ return 0; ++} ++ ++static const struct of_device_id ns_thermal_of_match[] = { ++ { .compatible = "brcm,ns-thermal", }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, ns_thermal_of_match); ++ ++static struct platform_driver ns_thermal_driver = { ++ .probe = ns_thermal_probe, ++ .remove = ns_thermal_remove, ++ .driver = { ++ .name = "ns-thermal", ++ .of_match_table = ns_thermal_of_match, ++ }, ++}; ++module_platform_driver(ns_thermal_driver); ++ ++MODULE_DESCRIPTION("Northstar thermal driver"); ++MODULE_LICENSE("GPL v2"); diff --git a/target/linux/generic/patches-4.4/086-0005-thermal-broadcom-fix-compilation-of-Northstar-driver.patch b/target/linux/generic/patches-4.4/086-0005-thermal-broadcom-fix-compilation-of-Northstar-driver.patch new file mode 100644 index 0000000..62bfffe --- /dev/null +++ b/target/linux/generic/patches-4.4/086-0005-thermal-broadcom-fix-compilation-of-Northstar-driver.patch @@ -0,0 +1,19 @@ +From d44264c8735f79da3253520024841311c555ca31 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Fri, 14 Apr 2017 22:25:12 +0200 +Subject: [PATCH] thermal: broadcom: fix compilation of Northstar driver + +--- + drivers/thermal/broadcom/ns-thermal.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/thermal/broadcom/ns-thermal.c ++++ b/drivers/thermal/broadcom/ns-thermal.c +@@ -6,6 +6,7 @@ + * published by the Free Software Foundation. + */ + ++#include <asm/io.h> + #include <linux/module.h> + #include <linux/of_address.h> + #include <linux/platform_device.h> diff --git a/target/linux/generic/patches-4.9/081-0001-thermal-bcm2835-add-thermal-driver-for-bcm2835-SoC.patch b/target/linux/generic/patches-4.9/081-0001-thermal-bcm2835-add-thermal-driver-for-bcm2835-SoC.patch new file mode 100644 index 0000000..d1ef21e --- /dev/null +++ b/target/linux/generic/patches-4.9/081-0001-thermal-bcm2835-add-thermal-driver-for-bcm2835-SoC.patch @@ -0,0 +1,365 @@ +From bcb7dd9ef206f7d646ed8dac6fe7772083714253 Mon Sep 17 00:00:00 2001 +From: Stefan Wahren <stefan.wahren@i2se.com> +Date: Fri, 31 Mar 2017 20:03:06 +0000 +Subject: [PATCH] thermal: bcm2835: add thermal driver for bcm2835 SoC +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Add basic thermal driver for bcm2835 SoC. + +This driver currently make sure that tsense HW block is set up +correctly. + +Tested-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: Martin Sperl <kernel@martin.sperl.org> +Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> +Acked-by: Eric Anholt <eric@anholt.net> +Acked-by: Eduardo Valentin <edubezval@gmail.com> +Signed-off-by: Eduardo Valentin <edubezval@gmail.com> +--- + drivers/thermal/Kconfig | 8 + + drivers/thermal/Makefile | 1 + + drivers/thermal/bcm2835_thermal.c | 314 ++++++++++++++++++++++++++++++++++++++ + 3 files changed, 323 insertions(+) + create mode 100644 drivers/thermal/bcm2835_thermal.c + +--- a/drivers/thermal/Kconfig ++++ b/drivers/thermal/Kconfig +@@ -434,4 +434,12 @@ depends on (ARCH_QCOM && OF) || COMPILE_ + source "drivers/thermal/qcom/Kconfig" + endmenu + ++config BCM2835_THERMAL ++ tristate "Thermal sensors on bcm2835 SoC" ++ depends on ARCH_BCM2835 || COMPILE_TEST ++ depends on HAS_IOMEM ++ depends on THERMAL_OF ++ help ++ Support for thermal sensors on Broadcom bcm2835 SoCs. ++ + endif +--- a/drivers/thermal/Makefile ++++ b/drivers/thermal/Makefile +@@ -55,3 +55,4 @@ obj-$(CONFIG_TEGRA_SOCTHERM) += tegra/ + obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o + obj-$(CONFIG_MTK_THERMAL) += mtk_thermal.o + obj-$(CONFIG_GENERIC_ADC_THERMAL) += thermal-generic-adc.o ++obj-$(CONFIG_BCM2835_THERMAL) += bcm2835_thermal.o +--- /dev/null ++++ b/drivers/thermal/bcm2835_thermal.c +@@ -0,0 +1,314 @@ ++/* ++ * Driver for Broadcom BCM2835 SoC temperature sensor ++ * ++ * Copyright (C) 2016 Martin Sperl ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * 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/clk.h> ++#include <linux/debugfs.h> ++#include <linux/device.h> ++#include <linux/err.h> ++#include <linux/io.h> ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/of.h> ++#include <linux/of_address.h> ++#include <linux/of_device.h> ++#include <linux/platform_device.h> ++#include <linux/thermal.h> ++ ++#define BCM2835_TS_TSENSCTL 0x00 ++#define BCM2835_TS_TSENSSTAT 0x04 ++ ++#define BCM2835_TS_TSENSCTL_PRWDW BIT(0) ++#define BCM2835_TS_TSENSCTL_RSTB BIT(1) ++ ++/* ++ * bandgap reference voltage in 6 mV increments ++ * 000b = 1178 mV, 001b = 1184 mV, ... 111b = 1220 mV ++ */ ++#define BCM2835_TS_TSENSCTL_CTRL_BITS 3 ++#define BCM2835_TS_TSENSCTL_CTRL_SHIFT 2 ++#define BCM2835_TS_TSENSCTL_CTRL_MASK \ ++ GENMASK(BCM2835_TS_TSENSCTL_CTRL_BITS + \ ++ BCM2835_TS_TSENSCTL_CTRL_SHIFT - 1, \ ++ BCM2835_TS_TSENSCTL_CTRL_SHIFT) ++#define BCM2835_TS_TSENSCTL_CTRL_DEFAULT 1 ++#define BCM2835_TS_TSENSCTL_EN_INT BIT(5) ++#define BCM2835_TS_TSENSCTL_DIRECT BIT(6) ++#define BCM2835_TS_TSENSCTL_CLR_INT BIT(7) ++#define BCM2835_TS_TSENSCTL_THOLD_SHIFT 8 ++#define BCM2835_TS_TSENSCTL_THOLD_BITS 10 ++#define BCM2835_TS_TSENSCTL_THOLD_MASK \ ++ GENMASK(BCM2835_TS_TSENSCTL_THOLD_BITS + \ ++ BCM2835_TS_TSENSCTL_THOLD_SHIFT - 1, \ ++ BCM2835_TS_TSENSCTL_THOLD_SHIFT) ++/* ++ * time how long the block to be asserted in reset ++ * which based on a clock counter (TSENS clock assumed) ++ */ ++#define BCM2835_TS_TSENSCTL_RSTDELAY_SHIFT 18 ++#define BCM2835_TS_TSENSCTL_RSTDELAY_BITS 8 ++#define BCM2835_TS_TSENSCTL_REGULEN BIT(26) ++ ++#define BCM2835_TS_TSENSSTAT_DATA_BITS 10 ++#define BCM2835_TS_TSENSSTAT_DATA_SHIFT 0 ++#define BCM2835_TS_TSENSSTAT_DATA_MASK \ ++ GENMASK(BCM2835_TS_TSENSSTAT_DATA_BITS + \ ++ BCM2835_TS_TSENSSTAT_DATA_SHIFT - 1, \ ++ BCM2835_TS_TSENSSTAT_DATA_SHIFT) ++#define BCM2835_TS_TSENSSTAT_VALID BIT(10) ++#define BCM2835_TS_TSENSSTAT_INTERRUPT BIT(11) ++ ++struct bcm2835_thermal_data { ++ struct thermal_zone_device *tz; ++ void __iomem *regs; ++ struct clk *clk; ++ struct dentry *debugfsdir; ++}; ++ ++static int bcm2835_thermal_adc2temp(u32 adc, int offset, int slope) ++{ ++ return offset + slope * adc; ++} ++ ++static int bcm2835_thermal_temp2adc(int temp, int offset, int slope) ++{ ++ temp -= offset; ++ temp /= slope; ++ ++ if (temp < 0) ++ temp = 0; ++ if (temp >= BIT(BCM2835_TS_TSENSSTAT_DATA_BITS)) ++ temp = BIT(BCM2835_TS_TSENSSTAT_DATA_BITS) - 1; ++ ++ return temp; ++} ++ ++static int bcm2835_thermal_get_temp(void *d, int *temp) ++{ ++ struct bcm2835_thermal_data *data = d; ++ u32 val = readl(data->regs + BCM2835_TS_TSENSSTAT); ++ ++ if (!(val & BCM2835_TS_TSENSSTAT_VALID)) ++ return -EIO; ++ ++ val &= BCM2835_TS_TSENSSTAT_DATA_MASK; ++ ++ *temp = bcm2835_thermal_adc2temp( ++ val, ++ thermal_zone_get_offset(data->tz), ++ thermal_zone_get_slope(data->tz)); ++ ++ return 0; ++} ++ ++static const struct debugfs_reg32 bcm2835_thermal_regs[] = { ++ { ++ .name = "ctl", ++ .offset = 0 ++ }, ++ { ++ .name = "stat", ++ .offset = 4 ++ } ++}; ++ ++static void bcm2835_thermal_debugfs(struct platform_device *pdev) ++{ ++ struct thermal_zone_device *tz = platform_get_drvdata(pdev); ++ struct bcm2835_thermal_data *data = tz->devdata; ++ struct debugfs_regset32 *regset; ++ ++ data->debugfsdir = debugfs_create_dir("bcm2835_thermal", NULL); ++ if (!data->debugfsdir) ++ return; ++ ++ regset = devm_kzalloc(&pdev->dev, sizeof(*regset), GFP_KERNEL); ++ if (!regset) ++ return; ++ ++ regset->regs = bcm2835_thermal_regs; ++ regset->nregs = ARRAY_SIZE(bcm2835_thermal_regs); ++ regset->base = data->regs; ++ ++ debugfs_create_regset32("regset", 0444, data->debugfsdir, regset); ++} ++ ++static struct thermal_zone_of_device_ops bcm2835_thermal_ops = { ++ .get_temp = bcm2835_thermal_get_temp, ++}; ++ ++/* ++ * Note: as per Raspberry Foundation FAQ ++ * (https://www.raspberrypi.org/help/faqs/#performanceOperatingTemperature) ++ * the recommended temperature range for the SoC -40C to +85C ++ * so the trip limit is set to 80C. ++ * this applies to all the BCM283X SoC ++ */ ++ ++static const struct of_device_id bcm2835_thermal_of_match_table[] = { ++ { ++ .compatible = "brcm,bcm2835-thermal", ++ }, ++ { ++ .compatible = "brcm,bcm2836-thermal", ++ }, ++ { ++ .compatible = "brcm,bcm2837-thermal", ++ }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, bcm2835_thermal_of_match_table); ++ ++static int bcm2835_thermal_probe(struct platform_device *pdev) ++{ ++ const struct of_device_id *match; ++ struct thermal_zone_device *tz; ++ struct bcm2835_thermal_data *data; ++ struct resource *res; ++ int err = 0; ++ u32 val; ++ unsigned long rate; ++ ++ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); ++ if (!data) ++ return -ENOMEM; ++ ++ match = of_match_device(bcm2835_thermal_of_match_table, ++ &pdev->dev); ++ if (!match) ++ return -EINVAL; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ data->regs = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(data->regs)) { ++ err = PTR_ERR(data->regs); ++ dev_err(&pdev->dev, "Could not get registers: %d\n", err); ++ return err; ++ } ++ ++ data->clk = devm_clk_get(&pdev->dev, NULL); ++ if (IS_ERR(data->clk)) { ++ err = PTR_ERR(data->clk); ++ if (err != -EPROBE_DEFER) ++ dev_err(&pdev->dev, "Could not get clk: %d\n", err); ++ return err; ++ } ++ ++ err = clk_prepare_enable(data->clk); ++ if (err) ++ return err; ++ ++ rate = clk_get_rate(data->clk); ++ if ((rate < 1920000) || (rate > 5000000)) ++ dev_warn(&pdev->dev, ++ "Clock %pCn running at %pCr Hz is outside of the recommended range: 1.92 to 5MHz\n", ++ data->clk, data->clk); ++ ++ /* register of thermal sensor and get info from DT */ ++ tz = thermal_zone_of_sensor_register(&pdev->dev, 0, data, ++ &bcm2835_thermal_ops); ++ if (IS_ERR(tz)) { ++ err = PTR_ERR(tz); ++ dev_err(&pdev->dev, ++ "Failed to register the thermal device: %d\n", ++ err); ++ goto err_clk; ++ } ++ ++ /* ++ * right now the FW does set up the HW-block, so we are not ++ * touching the configuration registers. ++ * But if the HW is not enabled, then set it up ++ * using "sane" values used by the firmware right now. ++ */ ++ val = readl(data->regs + BCM2835_TS_TSENSCTL); ++ if (!(val & BCM2835_TS_TSENSCTL_RSTB)) { ++ int trip_temp, offset, slope; ++ ++ slope = thermal_zone_get_slope(tz); ++ offset = thermal_zone_get_offset(tz); ++ /* ++ * For now we deal only with critical, otherwise ++ * would need to iterate ++ */ ++ err = tz->ops->get_trip_temp(tz, 0, &trip_temp); ++ if (err < 0) { ++ err = PTR_ERR(tz); ++ dev_err(&pdev->dev, ++ "Not able to read trip_temp: %d\n", ++ err); ++ goto err_tz; ++ } ++ ++ /* set bandgap reference voltage and enable voltage regulator */ ++ val = (BCM2835_TS_TSENSCTL_CTRL_DEFAULT << ++ BCM2835_TS_TSENSCTL_CTRL_SHIFT) | ++ BCM2835_TS_TSENSCTL_REGULEN; ++ ++ /* use the recommended reset duration */ ++ val |= (0xFE << BCM2835_TS_TSENSCTL_RSTDELAY_SHIFT); ++ ++ /* trip_adc value from info */ ++ val |= bcm2835_thermal_temp2adc(trip_temp, ++ offset, ++ slope) ++ << BCM2835_TS_TSENSCTL_THOLD_SHIFT; ++ ++ /* write the value back to the register as 2 steps */ ++ writel(val, data->regs + BCM2835_TS_TSENSCTL); ++ val |= BCM2835_TS_TSENSCTL_RSTB; ++ writel(val, data->regs + BCM2835_TS_TSENSCTL); ++ } ++ ++ data->tz = tz; ++ ++ platform_set_drvdata(pdev, tz); ++ ++ bcm2835_thermal_debugfs(pdev); ++ ++ return 0; ++err_tz: ++ thermal_zone_of_sensor_unregister(&pdev->dev, tz); ++err_clk: ++ clk_disable_unprepare(data->clk); ++ ++ return err; ++} ++ ++static int bcm2835_thermal_remove(struct platform_device *pdev) ++{ ++ struct thermal_zone_device *tz = platform_get_drvdata(pdev); ++ struct bcm2835_thermal_data *data = tz->devdata; ++ ++ debugfs_remove_recursive(data->debugfsdir); ++ thermal_zone_of_sensor_unregister(&pdev->dev, tz); ++ clk_disable_unprepare(data->clk); ++ ++ return 0; ++} ++ ++static struct platform_driver bcm2835_thermal_driver = { ++ .probe = bcm2835_thermal_probe, ++ .remove = bcm2835_thermal_remove, ++ .driver = { ++ .name = "bcm2835_thermal", ++ .of_match_table = bcm2835_thermal_of_match_table, ++ }, ++}; ++module_platform_driver(bcm2835_thermal_driver); ++ ++MODULE_AUTHOR("Martin Sperl"); ++MODULE_DESCRIPTION("Thermal driver for bcm2835 chip"); ++MODULE_LICENSE("GPL"); diff --git a/target/linux/generic/patches-4.9/081-0002-thermal-broadcom-add-Northstar-thermal-driver.patch b/target/linux/generic/patches-4.9/081-0002-thermal-broadcom-add-Northstar-thermal-driver.patch new file mode 100644 index 0000000..8ba8cb5 --- /dev/null +++ b/target/linux/generic/patches-4.9/081-0002-thermal-broadcom-add-Northstar-thermal-driver.patch @@ -0,0 +1,173 @@ +From a94cb7eeecc4104a6874339f90c5d0647359c102 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Mon, 3 Apr 2017 17:48:29 +0200 +Subject: [PATCH] thermal: broadcom: add Northstar thermal driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Northstar is a SoC family commonly used in home routers. This commit +adds a driver for checking CPU temperature. As Northstar Plus seems to +also have this IP block this new symbol gets ARCH_BCM_IPROC dependency. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: Jon Mason <jon.mason@broadcom.com> +Signed-off-by: Eduardo Valentin <edubezval@gmail.com> +--- + drivers/thermal/Kconfig | 5 ++ + drivers/thermal/Makefile | 1 + + drivers/thermal/broadcom/Kconfig | 8 +++ + drivers/thermal/broadcom/Makefile | 1 + + drivers/thermal/broadcom/ns-thermal.c | 105 ++++++++++++++++++++++++++++++++++ + 5 files changed, 120 insertions(+) + create mode 100644 drivers/thermal/broadcom/Kconfig + create mode 100644 drivers/thermal/broadcom/Makefile + create mode 100644 drivers/thermal/broadcom/ns-thermal.c + +--- a/drivers/thermal/Kconfig ++++ b/drivers/thermal/Kconfig +@@ -381,6 +381,11 @@ config MTK_THERMAL + Enable this option if you want to have support for thermal management + controller present in Mediatek SoCs + ++menu "Broadcom thermal drivers" ++depends on ARCH_BCM || COMPILE_TEST ++source "drivers/thermal/broadcom/Kconfig" ++endmenu ++ + menu "Texas Instruments thermal drivers" + depends on ARCH_HAS_BANDGAP || COMPILE_TEST + depends on HAS_IOMEM +--- a/drivers/thermal/Makefile ++++ b/drivers/thermal/Makefile +@@ -26,6 +26,7 @@ thermal_sys-$(CONFIG_CLOCK_THERMAL) += c + thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o + + # platform thermal drivers ++obj-y += broadcom/ + obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o + obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o + obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o +--- /dev/null ++++ b/drivers/thermal/broadcom/Kconfig +@@ -0,0 +1,8 @@ ++config BCM_NS_THERMAL ++ tristate "Northstar thermal driver" ++ depends on ARCH_BCM_IPROC || COMPILE_TEST ++ help ++ Northstar is a family of SoCs that includes e.g. BCM4708, BCM47081, ++ BCM4709 and BCM47094. It contains DMU (Device Management Unit) block ++ with a thermal sensor that allows checking CPU temperature. This ++ driver provides support for it. +--- /dev/null ++++ b/drivers/thermal/broadcom/Makefile +@@ -0,0 +1 @@ ++obj-$(CONFIG_BCM_NS_THERMAL) += ns-thermal.o +--- /dev/null ++++ b/drivers/thermal/broadcom/ns-thermal.c +@@ -0,0 +1,105 @@ ++/* ++ * Copyright (C) 2017 Rafał Miłecki <rafal@milecki.pl> ++ * ++ * 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/module.h> ++#include <linux/of_address.h> ++#include <linux/platform_device.h> ++#include <linux/thermal.h> ++ ++#define PVTMON_CONTROL0 0x00 ++#define PVTMON_CONTROL0_SEL_MASK 0x0000000e ++#define PVTMON_CONTROL0_SEL_TEMP_MONITOR 0x00000000 ++#define PVTMON_CONTROL0_SEL_TEST_MODE 0x0000000e ++#define PVTMON_STATUS 0x08 ++ ++struct ns_thermal { ++ struct thermal_zone_device *tz; ++ void __iomem *pvtmon; ++}; ++ ++static int ns_thermal_get_temp(void *data, int *temp) ++{ ++ struct ns_thermal *ns_thermal = data; ++ int offset = thermal_zone_get_offset(ns_thermal->tz); ++ int slope = thermal_zone_get_slope(ns_thermal->tz); ++ u32 val; ++ ++ val = readl(ns_thermal->pvtmon + PVTMON_CONTROL0); ++ if ((val & PVTMON_CONTROL0_SEL_MASK) != PVTMON_CONTROL0_SEL_TEMP_MONITOR) { ++ /* Clear current mode selection */ ++ val &= ~PVTMON_CONTROL0_SEL_MASK; ++ ++ /* Set temp monitor mode (it's the default actually) */ ++ val |= PVTMON_CONTROL0_SEL_TEMP_MONITOR; ++ ++ writel(val, ns_thermal->pvtmon + PVTMON_CONTROL0); ++ } ++ ++ val = readl(ns_thermal->pvtmon + PVTMON_STATUS); ++ *temp = slope * val + offset; ++ ++ return 0; ++} ++ ++static const struct thermal_zone_of_device_ops ns_thermal_ops = { ++ .get_temp = ns_thermal_get_temp, ++}; ++ ++static int ns_thermal_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct ns_thermal *ns_thermal; ++ ++ ns_thermal = devm_kzalloc(dev, sizeof(*ns_thermal), GFP_KERNEL); ++ if (!ns_thermal) ++ return -ENOMEM; ++ ++ ns_thermal->pvtmon = of_iomap(dev_of_node(dev), 0); ++ if (WARN_ON(!ns_thermal->pvtmon)) ++ return -ENOENT; ++ ++ ns_thermal->tz = devm_thermal_zone_of_sensor_register(dev, 0, ++ ns_thermal, ++ &ns_thermal_ops); ++ if (IS_ERR(ns_thermal->tz)) { ++ iounmap(ns_thermal->pvtmon); ++ return PTR_ERR(ns_thermal->tz); ++ } ++ ++ platform_set_drvdata(pdev, ns_thermal); ++ ++ return 0; ++} ++ ++static int ns_thermal_remove(struct platform_device *pdev) ++{ ++ struct ns_thermal *ns_thermal = platform_get_drvdata(pdev); ++ ++ iounmap(ns_thermal->pvtmon); ++ ++ return 0; ++} ++ ++static const struct of_device_id ns_thermal_of_match[] = { ++ { .compatible = "brcm,ns-thermal", }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, ns_thermal_of_match); ++ ++static struct platform_driver ns_thermal_driver = { ++ .probe = ns_thermal_probe, ++ .remove = ns_thermal_remove, ++ .driver = { ++ .name = "ns-thermal", ++ .of_match_table = ns_thermal_of_match, ++ }, ++}; ++module_platform_driver(ns_thermal_driver); ++ ++MODULE_DESCRIPTION("Northstar thermal driver"); ++MODULE_LICENSE("GPL v2"); |