Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux

Pull thermal management updates from Zhang Rui:

 - introduce brcmstb AVS TMON thermal driver (Brian Norris)

 - add Rockchip RV1108 support in rockchip thermal driver (Rocky Hao)

 - major rework on HISI driver plus additional support of hisi3660
   (Daniel Lezcano)

 - add nvmem-cells binding on imx6sx (Leonard Crestez)

 - fix a NULL pointer dereference on ti thermal driver unloading (Tony
   Lindgren)

 - improve tmon tool to make it easier to cross-compile tmon (Markus
   Mayer)

 - add Coffee Lake and Cannon Lake support for intel processor and pch
   thermal drivers (Srinivas Pandruvada)

 - other small fixes and cleanups (Arvind Yadav, Colin Ian King, Allen
   Wild, Nicolin Chen, Baruch SiachNiklas Söderlund, Arnd Bergmann)

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (44 commits)
  thermal: pch: Add Cannon Lake support
  thermal: int340x: processor_thermal: Add Coffee Lake support
  thermal: int340x: processor_thermal: Add Cannon Lake support
  thermal: bxt: remove redundant variable trip
  thermal: cpu_cooling: pr_err() strings should end with newlines
  thermal: add brcmstb AVS TMON driver
  Documentation: devicetree: add binding for Broadcom STB AVS TMON
  thermal/drivers/hisi: Add support for hi3660 SoC
  thermal/drivers/hisi: Prepare to add support for other hisi platforms
  thermal/drivers/hisi: Add platform prefix to function name
  thermal/drivers/hisi: Put platform code together
  thermal/drivers/qcom-spmi: Use devm_iio_channel_get
  thermal/drivers/generic-iio-adc: Switch tz request to devm version
  thermal/drivers/step_wise: Fix temperature regulation misbehavior
  thermal/drivers/hisi: Use round up step value
  thermal/drivers/hisi: Move the clk setup in the corresponding functions
  thermal/drivers/hisi: Remove mutex_lock in the code
  thermal/drivers/hisi: Remove thermal data back pointer
  thermal/drivers/hisi: Convert long to int
  thermal/drivers/hisi: Rename and remove unused field
  ...

Documentation/devicetree/bindings/thermal/brcm,avs-tmon.txt

+* Broadcom STB thermal management
+
+Thermal management core, provided by the AVS TMON hardware block.
+
+Required properties:
+- compatible: must be "brcm,avs-tmon" and/or "brcm,avs-tmon-bcm7445"
+- reg: address range for the AVS TMON registers
+- interrupts: temperature monitor interrupt, for high/low threshold triggers
+- interrupt-names: should be "tmon"
+- interrupt-parent: the parent interrupt controller
+
+Example:
+
+	thermal@f04d1500 {
+		compatible = "brcm,avs-tmon-bcm7445", "brcm,avs-tmon";
+		reg = <0xf04d1500 0x28>;
+		interrupts = <0x6>;
+		interrupt-names = "tmon";
+		interrupt-parent = <&avs_host_l2_intc>;
+	};

Documentation/devicetree/bindings/thermal/imx-thermal.txt

@@ -7,10 +7,17 @@ Required properties:
   is higher than panic threshold, system will auto reboot by SRC module.
 - fsl,tempmon : phandle pointer to system controller that contains TEMPMON
   control registers, e.g. ANATOP on imx6q.
+- nvmem-cells: A phandle to the calibration cells provided by ocotp.
+- nvmem-cell-names: Should be "calib", "temp_grade".
+
+Deprecated properties:
 - 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.
 
+Direct access to OCOTP via fsl,tempmon-data is incorrect on some newer chips
+because it does not handle OCOTP clock requirements.
+
 Optional properties:
 - clocks : thermal sensor's clock source.
 

Documentation/devicetree/bindings/thermal/rockchip-thermal.txt

@@ -2,6 +2,7 @@
 
 Required properties:
 - compatible : should be "rockchip,<name>-tsadc"
+   "rockchip,rv1108-tsadc": found on RV1108 SoCs
    "rockchip,rk3228-tsadc": found on RK3228 SoCs
    "rockchip,rk3288-tsadc": found on RK3288 SoCs
    "rockchip,rk3328-tsadc": found on RK3328 SoCs

MAINTAINERS

@@ -2986,6 +2986,14 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/cpufreq/brcm,stb-avs-cpu-freq.txt
 F:	drivers/cpufreq/brcmstb*
 
+BROADCOM STB AVS TMON DRIVER
+M:	Markus Mayer <mmayer@broadcom.com>
+M:	bcm-kernel-feedback-list@broadcom.com
+L:	linux-pm@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/thermal/brcm,avs-tmon.txt
+F:	drivers/thermal/broadcom/brcmstb*
+
 BROADCOM STB NAND FLASH DRIVER
 M:	Brian Norris <computersforpeace@gmail.com>
 M:	Kamal Dasu <kdasu.kdev@gmail.com>

drivers/thermal/Kconfig

@@ -206,6 +206,7 @@ config HISI_THERMAL
 config IMX_THERMAL
 	tristate "Temperature sensor driver for Freescale i.MX SoCs"
 	depends on (ARCH_MXC && CPU_THERMAL) || COMPILE_TEST
+	depends on NVMEM || !NVMEM
 	depends on MFD_SYSCON
 	depends on OF
 	help
@@ -408,7 +409,7 @@ config MTK_THERMAL
 	  controller present in Mediatek SoCs
 
 menu "Broadcom thermal drivers"
-depends on ARCH_BCM || COMPILE_TEST
+depends on ARCH_BCM || ARCH_BRCMSTB || ARCH_BCM2835 || COMPILE_TEST
 source "drivers/thermal/broadcom/Kconfig"
 endmenu
 

drivers/thermal/armada_thermal.c

@@ -58,7 +58,7 @@ struct armada_thermal_data {
 	/* Test for a valid sensor value (optional) */
 	bool (*is_valid)(struct armada_thermal_priv *);
 
-	/* Formula coeficients: temp = (b + m * reg) / div */
+	/* Formula coeficients: temp = (b - m * reg) / div */
 	unsigned long coef_b;
 	unsigned long coef_m;
 	unsigned long coef_div;

drivers/thermal/broadcom/Kconfig

@@ -6,6 +6,13 @@ config BCM2835_THERMAL
 	help
 	  Support for thermal sensors on Broadcom bcm2835 SoCs.
 
+config BRCMSTB_THERMAL
+	tristate "Broadcom STB AVS TMON thermal driver"
+	depends on ARCH_BRCMSTB || COMPILE_TEST
+	help
+	  Enable this driver if you have a Broadcom STB SoC and would like
+	  thermal framework support.
+
 config BCM_NS_THERMAL
 	tristate "Northstar thermal driver"
 	depends on ARCH_BCM_IPROC || COMPILE_TEST

drivers/thermal/broadcom/Makefile

 obj-$(CONFIG_BCM2835_THERMAL)		+= bcm2835_thermal.o
+obj-$(CONFIG_BRCMSTB_THERMAL)		+= brcmstb_thermal.o
 obj-$(CONFIG_BCM_NS_THERMAL)		+= ns-thermal.o

drivers/thermal/broadcom/brcmstb_thermal.c

+/*
+ * Broadcom STB AVS TMON thermal sensor driver
+ *
+ * Copyright (c) 2015-2017 Broadcom
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#define DRV_NAME	"brcmstb_thermal"
+
+#define pr_fmt(fmt)	DRV_NAME ": " fmt
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/irqreturn.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <linux/thermal.h>
+
+#define AVS_TMON_STATUS			0x00
+ #define AVS_TMON_STATUS_valid_msk	BIT(11)
+ #define AVS_TMON_STATUS_data_msk	GENMASK(10, 1)
+ #define AVS_TMON_STATUS_data_shift	1
+
+#define AVS_TMON_EN_OVERTEMP_RESET	0x04
+ #define AVS_TMON_EN_OVERTEMP_RESET_msk	BIT(0)
+
+#define AVS_TMON_RESET_THRESH		0x08
+ #define AVS_TMON_RESET_THRESH_msk	GENMASK(10, 1)
+ #define AVS_TMON_RESET_THRESH_shift	1
+
+#define AVS_TMON_INT_IDLE_TIME		0x10
+
+#define AVS_TMON_EN_TEMP_INT_SRCS	0x14
+ #define AVS_TMON_EN_TEMP_INT_SRCS_high	BIT(1)
+ #define AVS_TMON_EN_TEMP_INT_SRCS_low	BIT(0)
+
+#define AVS_TMON_INT_THRESH		0x18
+ #define AVS_TMON_INT_THRESH_high_msk	GENMASK(26, 17)
+ #define AVS_TMON_INT_THRESH_high_shift	17
+ #define AVS_TMON_INT_THRESH_low_msk	GENMASK(10, 1)
+ #define AVS_TMON_INT_THRESH_low_shift	1
+
+#define AVS_TMON_TEMP_INT_CODE		0x1c
+#define AVS_TMON_TP_TEST_ENABLE		0x20
+
+/* Default coefficients */
+#define AVS_TMON_TEMP_SLOPE		-487
+#define AVS_TMON_TEMP_OFFSET		410040
+
+/* HW related temperature constants */
+#define AVS_TMON_TEMP_MAX		0x3ff
+#define AVS_TMON_TEMP_MIN		-88161
+#define AVS_TMON_TEMP_MASK		AVS_TMON_TEMP_MAX
+
+enum avs_tmon_trip_type {
+	TMON_TRIP_TYPE_LOW = 0,
+	TMON_TRIP_TYPE_HIGH,
+	TMON_TRIP_TYPE_RESET,
+	TMON_TRIP_TYPE_MAX,
+};
+
+struct avs_tmon_trip {
+	/* HW bit to enable the trip */
+	u32 enable_offs;
+	u32 enable_mask;
+
+	/* HW field to read the trip temperature */
+	u32 reg_offs;
+	u32 reg_msk;
+	int reg_shift;
+};
+
+static struct avs_tmon_trip avs_tmon_trips[] = {
+	/* Trips when temperature is below threshold */
+	[TMON_TRIP_TYPE_LOW] = {
+		.enable_offs	= AVS_TMON_EN_TEMP_INT_SRCS,
+		.enable_mask	= AVS_TMON_EN_TEMP_INT_SRCS_low,
+		.reg_offs	= AVS_TMON_INT_THRESH,
+		.reg_msk	= AVS_TMON_INT_THRESH_low_msk,
+		.reg_shift	= AVS_TMON_INT_THRESH_low_shift,
+	},
+	/* Trips when temperature is above threshold */
+	[TMON_TRIP_TYPE_HIGH] = {
+		.enable_offs	= AVS_TMON_EN_TEMP_INT_SRCS,
+		.enable_mask	= AVS_TMON_EN_TEMP_INT_SRCS_high,
+		.reg_offs	= AVS_TMON_INT_THRESH,
+		.reg_msk	= AVS_TMON_INT_THRESH_high_msk,
+		.reg_shift	= AVS_TMON_INT_THRESH_high_shift,
+	},
+	/* Automatically resets chip when above threshold */
+	[TMON_TRIP_TYPE_RESET] = {
+		.enable_offs	= AVS_TMON_EN_OVERTEMP_RESET,
+		.enable_mask	= AVS_TMON_EN_OVERTEMP_RESET_msk,
+		.reg_offs	= AVS_TMON_RESET_THRESH,
+		.reg_msk	= AVS_TMON_RESET_THRESH_msk,
+		.reg_shift	= AVS_TMON_RESET_THRESH_shift,
+	},
+};
+
+struct brcmstb_thermal_priv {
+	void __iomem *tmon_base;
+	struct device *dev;
+	struct thermal_zone_device *thermal;
+};
+
+static void avs_tmon_get_coeffs(struct thermal_zone_device *tz, int *slope,
+				int *offset)
+{
+	*slope = thermal_zone_get_slope(tz);
+	*offset = thermal_zone_get_offset(tz);
+}
+
+/* Convert a HW code to a temperature reading (millidegree celsius) */
+static inline int avs_tmon_code_to_temp(struct thermal_zone_device *tz,
+					u32 code)
+{
+	const int val = code & AVS_TMON_TEMP_MASK;
+	int slope, offset;
+
+	avs_tmon_get_coeffs(tz, &slope, &offset);
+
+	return slope * val + offset;
+}
+
+/*
+ * Convert a temperature value (millidegree celsius) to a HW code
+ *
+ * @temp: temperature to convert
+ * @low: if true, round toward the low side
+ */
+static inline u32 avs_tmon_temp_to_code(struct thermal_zone_device *tz,
+					int temp, bool low)
+{
+	int slope, offset;
+
+	if (temp < AVS_TMON_TEMP_MIN)
+		return AVS_TMON_TEMP_MAX; /* Maximum code value */
+
+	avs_tmon_get_coeffs(tz, &slope, &offset);
+
+	if (temp >= offset)
+		return 0;	/* Minimum code value */
+
+	if (low)
+		return (u32)(DIV_ROUND_UP(offset - temp, abs(slope)));
+	else
+		return (u32)((offset - temp) / abs(slope));
+}
+
+static int brcmstb_get_temp(void *data, int *temp)
+{
+	struct brcmstb_thermal_priv *priv = data;
+	u32 val;
+	long t;
+
+	val = __raw_readl(priv->tmon_base + AVS_TMON_STATUS);
+
+	if (!(val & AVS_TMON_STATUS_valid_msk)) {
+		dev_err(priv->dev, "reading not valid\n");
+		return -EIO;
+	}
+
+	val = (val & AVS_TMON_STATUS_data_msk) >> AVS_TMON_STATUS_data_shift;
+
+	t = avs_tmon_code_to_temp(priv->thermal, val);
+	if (t < 0)
+		*temp = 0;
+	else
+		*temp = t;
+
+	return 0;
+}
+
+static void avs_tmon_trip_enable(struct brcmstb_thermal_priv *priv,
+				 enum avs_tmon_trip_type type, int en)
+{
+	struct avs_tmon_trip *trip = &avs_tmon_trips[type];
+	u32 val = __raw_readl(priv->tmon_base + trip->enable_offs);
+
+	dev_dbg(priv->dev, "%sable trip, type %d\n", en ? "en" : "dis", type);
+
+	if (en)
+		val |= trip->enable_mask;
+	else
+		val &= ~trip->enable_mask;
+
+	__raw_writel(val, priv->tmon_base + trip->enable_offs);
+}
+
+static int avs_tmon_get_trip_temp(struct brcmstb_thermal_priv *priv,
+				  enum avs_tmon_trip_type type)
+{
+	struct avs_tmon_trip *trip = &avs_tmon_trips[type];
+	u32 val = __raw_readl(priv->tmon_base + trip->reg_offs);
+
+	val &= trip->reg_msk;
+	val >>= trip->reg_shift;
+
+	return avs_tmon_code_to_temp(priv->thermal, val);
+}
+
+static void avs_tmon_set_trip_temp(struct brcmstb_thermal_priv *priv,
+				   enum avs_tmon_trip_type type,
+				   int temp)
+{
+	struct avs_tmon_trip *trip = &avs_tmon_trips[type];
+	u32 val, orig;
+
+	dev_dbg(priv->dev, "set temp %d to %d\n", type, temp);
+
+	/* round toward low temp for the low interrupt */
+	val = avs_tmon_temp_to_code(priv->thermal, temp,
+				    type == TMON_TRIP_TYPE_LOW);
+
+	val <<= trip->reg_shift;
+	val &= trip->reg_msk;
+
+	orig = __raw_readl(priv->tmon_base + trip->reg_offs);
+	orig &= ~trip->reg_msk;
+	orig |= val;
+	__raw_writel(orig, priv->tmon_base + trip->reg_offs);
+}
+
+static int avs_tmon_get_intr_temp(struct brcmstb_thermal_priv *priv)
+{
+	u32 val;
+
+	val = __raw_readl(priv->tmon_base + AVS_TMON_TEMP_INT_CODE);
+	return avs_tmon_code_to_temp(priv->thermal, val);
+}
+
+static irqreturn_t brcmstb_tmon_irq_thread(int irq, void *data)
+{
+	struct brcmstb_thermal_priv *priv = data;
+	int low, high, intr;
+
+	low = avs_tmon_get_trip_temp(priv, TMON_TRIP_TYPE_LOW);
+	high = avs_tmon_get_trip_temp(priv, TMON_TRIP_TYPE_HIGH);
+	intr = avs_tmon_get_intr_temp(priv);
+
+	dev_dbg(priv->dev, "low/intr/high: %d/%d/%d\n",
+			low, intr, high);
+
+	/* Disable high-temp until next threshold shift */
+	if (intr >= high)
+		avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_HIGH, 0);
+	/* Disable low-temp until next threshold shift */
+	if (intr <= low)
+		avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_LOW, 0);
+
+	/*
+	 * Notify using the interrupt temperature, in case the temperature
+	 * changes before it can next be read out
+	 */
+	thermal_zone_device_update(priv->thermal, intr);
+
+	return IRQ_HANDLED;
+}
+
+static int brcmstb_set_trips(void *data, int low, int high)
+{
+	struct brcmstb_thermal_priv *priv = data;
+
+	dev_dbg(priv->dev, "set trips %d <--> %d\n", low, high);
+
+	/*
+	 * Disable low-temp if "low" is too small. As per thermal framework
+	 * API, we use -INT_MAX rather than INT_MIN.
+	 */
+	if (low <= -INT_MAX) {
+		avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_LOW, 0);
+	} else {
+		avs_tmon_set_trip_temp(priv, TMON_TRIP_TYPE_LOW, low);
+		avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_LOW, 1);
+	}
+
+	/* Disable high-temp if "high" is too big. */
+	if (high == INT_MAX) {
+		avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_HIGH, 0);
+	} else {
+		avs_tmon_set_trip_temp(priv, TMON_TRIP_TYPE_HIGH, high);
+		avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_HIGH, 1);
+	}
+
+	return 0;
+}
+
+static struct thermal_zone_of_device_ops of_ops = {
+	.get_temp	= brcmstb_get_temp,
+	.set_trips	= brcmstb_set_trips,
+};
+
+static const struct of_device_id brcmstb_thermal_id_table[] = {
+	{ .compatible = "brcm,avs-tmon" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, brcmstb_thermal_id_table);
+
+static int brcmstb_thermal_probe(struct platform_device *pdev)
+{
+	struct thermal_zone_device *thermal;
+	struct brcmstb_thermal_priv *priv;
+	struct resource *res;
+	int irq, ret;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->tmon_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(priv->tmon_base))
+		return PTR_ERR(priv->tmon_base);
+
+	priv->dev = &pdev->dev;
+	platform_set_drvdata(pdev, priv);
+
+	thermal = thermal_zone_of_sensor_register(&pdev->dev, 0, priv, &of_ops);
+	if (IS_ERR(thermal)) {
+		ret = PTR_ERR(thermal);
+		dev_err(&pdev->dev, "could not register sensor: %d\n", ret);
+		return ret;
+	}
+
+	priv->thermal = thermal;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(&pdev->dev, "could not get IRQ\n");
+		ret = irq;
+		goto err;
+	}
+	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+					brcmstb_tmon_irq_thread, IRQF_ONESHOT,
+					DRV_NAME, priv);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "could not request IRQ: %d\n", ret);
+		goto err;
+	}
+
+	dev_info(&pdev->dev, "registered AVS TMON of-sensor driver\n");
+
+	return 0;
+
+err:
+	thermal_zone_of_sensor_unregister(&pdev->dev, thermal);
+	return ret;
+}
+
+static int brcmstb_thermal_exit(struct platform_device *pdev)
+{
+	struct brcmstb_thermal_priv *priv = platform_get_drvdata(pdev);
+	struct thermal_zone_device *thermal = priv->thermal;
+
+	if (thermal)
+		thermal_zone_of_sensor_unregister(&pdev->dev, priv->thermal);
+
+	return 0;
+}
+
+static struct platform_driver brcmstb_thermal_driver = {
+	.probe = brcmstb_thermal_probe,
+	.remove = brcmstb_thermal_exit,
+	.driver = {
+		.name = DRV_NAME,
+		.of_match_table = brcmstb_thermal_id_table,
+	},
+};
+module_platform_driver(brcmstb_thermal_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Brian Norris");
+MODULE_DESCRIPTION("Broadcom STB AVS TMON thermal driver");

drivers/thermal/cpu_cooling.c

@@ -696,7 +696,7 @@ __cpufreq_cooling_register(struct device_node *np,
 	bool first;
 
 	if (IS_ERR_OR_NULL(policy)) {
-		pr_err("%s: cpufreq policy isn't valid: %p", __func__, policy);
+		pr_err("%s: cpufreq policy isn't valid: %p\n", __func__, policy);
 		return ERR_PTR(-EINVAL);
 	}
 

drivers/thermal/imx_thermal.c

@@ -25,6 +25,7 @@
 #include <linux/slab.h>
 #include <linux/thermal.h>
 #include <linux/types.h>
+#include <linux/nvmem-consumer.h>
 
 #define REG_SET		0x4
 #define REG_CLR		0x8
@@ -94,7 +95,7 @@ struct imx_thermal_data {
 	struct thermal_cooling_device *cdev;
 	enum thermal_device_mode mode;
 	struct regmap *tempmon;
-	u32 c1, c2; /* See formula in imx_get_sensor_data() */
+	u32 c1, c2; /* See formula in imx_init_calib() */
 	int temp_passive;
 	int temp_critical;
 	int temp_max;
@@ -177,7 +178,7 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
 
 	n_meas = (val & TEMPSENSE0_TEMP_CNT_MASK) >> TEMPSENSE0_TEMP_CNT_SHIFT;
 
-	/* See imx_get_sensor_data() for formula derivation */
+	/* See imx_init_calib() for formula derivation */
 	*temp = data->c2 - n_meas * data->c1;
 
 	/* Update alarm value to next higher trip point for TEMPMON_IMX6Q */
@@ -346,29 +347,12 @@ static struct thermal_zone_device_ops imx_tz_ops = {
 	.set_trip_temp = imx_set_trip_temp,
 };
 
-static int imx_get_sensor_data(struct platform_device *pdev)
+static int imx_init_calib(struct platform_device *pdev, u32 val)
 {
 	struct imx_thermal_data *data = platform_get_drvdata(pdev);
-	struct regmap *map;
 	int t1, n1;
-	int ret;
-	u32 val;
 	u64 temp64;
 
-	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;
@@ -405,12 +389,12 @@ static int imx_get_sensor_data(struct platform_device *pdev)
 	data->c1 = temp64;
 	data->c2 = n1 * data->c1 + 1000 * t1;
 
-	/* use OTP for thermal grade */
-	ret = regmap_read(map, OCOTP_MEM0, &val);
-	if (ret) {
-		dev_err(&pdev->dev, "failed to read temp grade: %d\n", ret);
-		return ret;
-	}
+	return 0;
+}
+
+static void imx_init_temp_grade(struct platform_device *pdev, u32 val)
+{
+	struct imx_thermal_data *data = platform_get_drvdata(pdev);
 
 	/* The maximum die temp is specified by the Temperature Grade */
 	switch ((val >> 6) & 0x3) {
@@ -438,6 +422,55 @@ static int imx_get_sensor_data(struct platform_device *pdev)
 	 */
 	data->temp_critical = data->temp_max - (1000 * 5);
 	data->temp_passive = data->temp_max - (1000 * 10);
+}
+
+static int imx_init_from_tempmon_data(struct platform_device *pdev)
+{
+	struct regmap *map;
+	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;
+	}
+	ret = imx_init_calib(pdev, val);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(map, OCOTP_MEM0, &val);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
+		return ret;
+	}
+	imx_init_temp_grade(pdev, val);
+
+	return 0;
+}
+
+static int imx_init_from_nvmem_cells(struct platform_device *pdev)
+{
+	int ret;
+	u32 val;
+
+	ret = nvmem_cell_read_u32(&pdev->dev, "calib", &val);
+	if (ret)
+		return ret;
+	imx_init_calib(pdev, val);
+
+	ret = nvmem_cell_read_u32(&pdev->dev, "temp_grade", &val);
+	if (ret)
+		return ret;
+	imx_init_temp_grade(pdev, val);
 
 	return 0;
 }
@@ -514,10 +547,21 @@ static int imx_thermal_probe(struct platform_device *pdev)
 
 	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;
+	if (of_find_property(pdev->dev.of_node, "nvmem-cells", NULL)) {
+		ret = imx_init_from_nvmem_cells(pdev);
+		if (ret == -EPROBE_DEFER)
+			return ret;
+		if (ret) {
+			dev_err(&pdev->dev, "failed to init from nvmem: %d\n",
+				ret);
+			return ret;
+		}
+	} else {
+		ret = imx_init_from_tempmon_data(pdev);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to init from from fsl,tempmon-data\n");
+			return ret;
+		}
 	}
 
 	/* Make sure sensor is in known good state for measurements */

drivers/thermal/int340x_thermal/processor_thermal_device.c

@@ -30,6 +30,10 @@
 /* Skylake thermal reporting device */
 #define PCI_DEVICE_ID_PROC_SKL_THERMAL	0x1903
 
+/* CannonLake thermal reporting device */
+#define PCI_DEVICE_ID_PROC_CNL_THERMAL	0x5a03
+#define PCI_DEVICE_ID_PROC_CFL_THERMAL	0x3E83
+
 /* Braswell thermal reporting device */
 #define PCI_DEVICE_ID_PROC_BSW_THERMAL	0x22DC
 
@@ -461,6 +465,8 @@ static const struct pci_device_id proc_thermal_pci_ids[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXT1_THERMAL)},
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXTX_THERMAL)},
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXTP_THERMAL)},
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_CNL_THERMAL)},
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_CFL_THERMAL)},
 	{ 0, },
 };
 

drivers/thermal/intel_bxt_pmic_thermal.c

@@ -166,7 +166,7 @@ static irqreturn_t pmic_thermal_irq_handler(int irq, void *data)
 	struct pmic_thermal_data *td;
 	struct intel_soc_pmic *pmic;
 	struct regmap *regmap;
-	u8 reg_val, mask, irq_stat, trip;
+	u8 reg_val, mask, irq_stat;
 	u16 reg, evt_stat_reg;
 	int i, j, ret;
 
@@ -201,7 +201,6 @@ static irqreturn_t pmic_thermal_irq_handler(int irq, void *data)
 			if (regmap_read(regmap, evt_stat_reg, &ret))
 				return IRQ_HANDLED;
 
-			trip = td->maps[i].trip_config[j].trip_num;
 			tzd = thermal_zone_get_zone_by_name(td->maps[i].handle);
 			if (!IS_ERR(tzd))
 				thermal_zone_device_update(tzd,

drivers/thermal/intel_pch_thermal.c

@@ -30,6 +30,8 @@
 #define PCH_THERMAL_DID_WPT	0x9CA4 /* Wildcat Point */
 #define PCH_THERMAL_DID_SKL	0x9D31 /* Skylake PCH */
 #define PCH_THERMAL_DID_SKL_H	0xA131 /* Skylake PCH 100 series */
+#define PCH_THERMAL_DID_CNL	0x9Df9 /* CNL PCH */
+#define PCH_THERMAL_DID_CNL_H	0xA379 /* CNL-H PCH */
 
 /* Wildcat Point-LP  PCH Thermal registers */
 #define WPT_TEMP	0x0000	/* Temperature */
@@ -278,6 +280,7 @@ enum board_ids {
 	board_hsw,
 	board_wpt,
 	board_skl,
+	board_cnl,
 };
 
 static const struct board_info {
@@ -296,6 +299,10 @@ static const struct board_info {
 		.name = "pch_skylake",
 		.ops = &pch_dev_ops_wpt,
 	},
+	[board_cnl] = {
+		.name = "pch_cannonlake",
+		.ops = &pch_dev_ops_wpt,
+	},
 };
 
 static int intel_pch_thermal_probe(struct pci_dev *pdev,
@@ -398,6 +405,10 @@ static const struct pci_device_id intel_pch_thermal_id[] = {
 		.driver_data = board_skl, },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL_H),
 		.driver_data = board_skl, },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL),
+		.driver_data = board_cnl, },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_H),
+		.driver_data = board_cnl, },
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id);

drivers/thermal/intel_powerclamp.c

@@ -675,13 +675,13 @@ static int __init powerclamp_probe(void)
 {
 
 	if (!x86_match_cpu(intel_powerclamp_ids)) {
-		pr_err("CPU does not support MWAIT");
+		pr_err("CPU does not support MWAIT\n");
 		return -ENODEV;
 	}
 
 	/* The goal for idle time alignment is to achieve package cstate. */
 	if (!has_pkg_state_counter()) {
-		pr_info("No package C-state available");
+		pr_info("No package C-state available\n");
 		return -ENODEV;
 	}
 

drivers/thermal/qcom-spmi-temp-alarm.c

@@ -125,7 +125,7 @@ static int qpnp_tm_get_temp(void *data, int *temp)
 	if (!temp)
 		return -EINVAL;
 
-	if (IS_ERR(chip->adc)) {
+	if (!chip->adc) {
 		ret = qpnp_tm_update_temp_no_adc(chip);
 		if (ret < 0)
 			return ret;
@@ -224,67 +224,53 @@ static int qpnp_tm_probe(struct platform_device *pdev)
 		return irq;
 
 	/* ADC based measurements are optional */
-	chip->adc = iio_channel_get(&pdev->dev, "thermal");
-	if (PTR_ERR(chip->adc) == -EPROBE_DEFER)
-		return PTR_ERR(chip->adc);
+	chip->adc = devm_iio_channel_get(&pdev->dev, "thermal");
+	if (IS_ERR(chip->adc)) {
+		ret = PTR_ERR(chip->adc);
+		chip->adc = NULL;
+		if (ret == -EPROBE_DEFER)
+			return ret;
+	}
 
 	chip->base = res;
 
 	ret = qpnp_tm_read(chip, QPNP_TM_REG_TYPE, &type);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "could not read type\n");
-		goto fail;
+		return ret;
 	}
 
 	ret = qpnp_tm_read(chip, QPNP_TM_REG_SUBTYPE, &subtype);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "could not read subtype\n");
-		goto fail;
+		return ret;
 	}
 
 	if (type != QPNP_TM_TYPE || subtype != QPNP_TM_SUBTYPE) {
 		dev_err(&pdev->dev, "invalid type 0x%02x or subtype 0x%02x\n",
 			type, subtype);
-		ret = -ENODEV;
-		goto fail;
+		return -ENODEV;
 	}
 
 	ret = qpnp_tm_init(chip);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "init failed\n");
-		goto fail;
+		return ret;
 	}
 
 	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, qpnp_tm_isr,
 					IRQF_ONESHOT, node->name, chip);
 	if (ret < 0)
-		goto fail;
+		return ret;
 
 	chip->tz_dev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, chip,
 							&qpnp_tm_sensor_ops);
 	if (IS_ERR(chip->tz_dev)) {
 		dev_err(&pdev->dev, "failed to register sensor\n");
-		ret = PTR_ERR(chip->tz_dev);
-		goto fail;
+		return PTR_ERR(chip->tz_dev);
 	}
 
 	return 0;
-
-fail:
-	if (!IS_ERR(chip->adc))
-		iio_channel_release(chip->adc);
-
-	return ret;
-}
-
-static int qpnp_tm_remove(struct platform_device *pdev)
-{
-	struct qpnp_tm_chip *chip = dev_get_drvdata(&pdev->dev);
-
-	if (!IS_ERR(chip->adc))
-		iio_channel_release(chip->adc);
-
-	return 0;
 }
 
 static const struct of_device_id qpnp_tm_match_table[] = {
@@ -299,7 +285,6 @@ static struct platform_driver qpnp_tm_driver = {
 		.of_match_table = qpnp_tm_match_table,
 	},
 	.probe  = qpnp_tm_probe,
-	.remove = qpnp_tm_remove,
 };
 module_platform_driver(qpnp_tm_driver);
 

drivers/thermal/rcar_gen3_thermal.c

@@ -24,6 +24,7 @@
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/spinlock.h>
+#include <linux/sys_soc.h>
 #include <linux/thermal.h>
 
 #include "thermal_core.h"
@@ -90,10 +91,6 @@ struct rcar_gen3_thermal_priv {
 	struct rcar_gen3_thermal_tsc *tscs[TSC_MAX_NUM];
 	unsigned int num_tscs;
 	spinlock_t lock; /* Protect interrupts on and off */
-	const struct rcar_gen3_thermal_data *data;
-};
-
-struct rcar_gen3_thermal_data {
 	void (*thermal_init)(struct rcar_gen3_thermal_tsc *tsc);
 };
 
@@ -278,7 +275,12 @@ static irqreturn_t rcar_gen3_thermal_irq_thread(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static void r8a7795_thermal_init(struct rcar_gen3_thermal_tsc *tsc)
+static const struct soc_device_attribute r8a7795es1[] = {
+	{ .soc_id = "r8a7795", .revision = "ES1.*" },
+	{ /* sentinel */ }
+};
+
+static void rcar_gen3_thermal_init_r8a7795es1(struct rcar_gen3_thermal_tsc *tsc)
 {
 	rcar_gen3_thermal_write(tsc, REG_GEN3_CTSR,  CTSR_THBGR);
 	rcar_gen3_thermal_write(tsc, REG_GEN3_CTSR,  0x0);
@@ -303,7 +305,7 @@ static void r8a7795_thermal_init(struct rcar_gen3_thermal_tsc *tsc)
 	usleep_range(1000, 2000);
 }
 
-static void r8a7796_thermal_init(struct rcar_gen3_thermal_tsc *tsc)
+static void rcar_gen3_thermal_init(struct rcar_gen3_thermal_tsc *tsc)
 {
 	u32 reg_val;
 
@@ -324,17 +326,9 @@ static void r8a7796_thermal_init(struct rcar_gen3_thermal_tsc *tsc)
 	usleep_range(1000, 2000);
 }
 
-static const struct rcar_gen3_thermal_data r8a7795_data = {
-	.thermal_init = r8a7795_thermal_init,
-};
-
-static const struct rcar_gen3_thermal_data r8a7796_data = {
-	.thermal_init = r8a7796_thermal_init,
-};
-
 static const struct of_device_id rcar_gen3_thermal_dt_ids[] = {
-	{ .compatible = "renesas,r8a7795-thermal", .data = &r8a7795_data},
-	{ .compatible = "renesas,r8a7796-thermal", .data = &r8a7796_data},
+	{ .compatible = "renesas,r8a7795-thermal", },
+	{ .compatible = "renesas,r8a7796-thermal", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, rcar_gen3_thermal_dt_ids);
@@ -371,7 +365,9 @@ static int rcar_gen3_thermal_probe(struct platform_device *pdev)
 	if (!priv)
 		return -ENOMEM;
 
-	priv->data = of_device_get_match_data(dev);
+	priv->thermal_init = rcar_gen3_thermal_init;
+	if (soc_device_match(r8a7795es1))
+		priv->thermal_init = rcar_gen3_thermal_init_r8a7795es1;
 
 	spin_lock_init(&priv->lock);
 
@@ -423,7 +419,7 @@ static int rcar_gen3_thermal_probe(struct platform_device *pdev)
 
 		priv->tscs[i] = tsc;
 
-		priv->data->thermal_init(tsc);
+		priv->thermal_init(tsc);
 		rcar_gen3_thermal_calc_coefs(&tsc->coef, ptat, thcode[i]);
 
 		zone = devm_thermal_zone_of_sensor_register(dev, i, tsc,
@@ -476,7 +472,7 @@ static int __maybe_unused rcar_gen3_thermal_resume(struct device *dev)
 	for (i = 0; i < priv->num_tscs; i++) {
 		struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i];
 
-		priv->data->thermal_init(tsc);
+		priv->thermal_init(tsc);
 		rcar_gen3_thermal_set_trips(tsc, tsc->low, tsc->high);
 	}
 

drivers/thermal/rockchip_thermal.c

@@ -242,6 +242,45 @@ struct tsadc_table {
 	int temp;
 };
 
+static const struct tsadc_table rv1108_table[] = {
+	{0, -40000},
+	{374, -40000},
+	{382, -35000},
+	{389, -30000},
+	{397, -25000},
+	{405, -20000},
+	{413, -15000},
+	{421, -10000},
+	{429, -5000},
+	{436, 0},
+	{444, 5000},
+	{452, 10000},
+	{460, 15000},
+	{468, 20000},
+	{476, 25000},
+	{483, 30000},
+	{491, 35000},
+	{499, 40000},
+	{507, 45000},
+	{515, 50000},
+	{523, 55000},
+	{531, 60000},
+	{539, 65000},
+	{547, 70000},
+	{555, 75000},
+	{562, 80000},
+	{570, 85000},
+	{578, 90000},
+	{586, 95000},
+	{594, 100000},
+	{602, 105000},
+	{610, 110000},
+	{618, 115000},
+	{626, 120000},
+	{634, 125000},
+	{TSADCV2_DATA_MASK, 125000},
+};
+
 static const struct tsadc_table rk3228_code_table[] = {
 	{0, -40000},
 	{588, -40000},
@@ -779,6 +818,30 @@ static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
 	writel_relaxed(val, regs + TSADCV2_INT_EN);
 }
 
+static const struct rockchip_tsadc_chip rv1108_tsadc_data = {
+	.chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
+	.chn_num = 1, /* one channel for tsadc */
+
+	.tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
+	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
+	.tshut_temp = 95000,
+
+	.initialize = rk_tsadcv2_initialize,
+	.irq_ack = rk_tsadcv3_irq_ack,
+	.control = rk_tsadcv3_control,
+	.get_temp = rk_tsadcv2_get_temp,
+	.set_alarm_temp = rk_tsadcv2_alarm_temp,
+	.set_tshut_temp = rk_tsadcv2_tshut_temp,
+	.set_tshut_mode = rk_tsadcv2_tshut_mode,
+
+	.table = {
+		.id = rv1108_table,
+		.length = ARRAY_SIZE(rv1108_table),
+		.data_mask = TSADCV2_DATA_MASK,
+		.mode = ADC_INCREMENT,
+	},
+};
+
 static const struct rockchip_tsadc_chip rk3228_tsadc_data = {
 	.chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
 	.chn_num = 1, /* one channel for tsadc */
@@ -927,6 +990,10 @@ static const struct rockchip_tsadc_chip rk3399_tsadc_data = {
 };
 
 static const struct of_device_id of_rockchip_thermal_match[] = {
+	{
+		.compatible = "rockchip,rv1108-tsadc",
+		.data = (void *)&rv1108_tsadc_data,
+	},
 	{
 		.compatible = "rockchip,rk3228-tsadc",
 		.data = (void *)&rk3228_tsadc_data,

drivers/thermal/step_wise.c

@@ -31,8 +31,7 @@
  * If the temperature is higher than a trip point,
  *    a. if the trend is THERMAL_TREND_RAISING, use higher cooling
  *       state for this trip point
- *    b. if the trend is THERMAL_TREND_DROPPING, use lower cooling
- *       state for this trip point
+ *    b. if the trend is THERMAL_TREND_DROPPING, do nothing
  *    c. if the trend is THERMAL_TREND_RAISE_FULL, use upper limit
  *       for this trip point
  *    d. if the trend is THERMAL_TREND_DROP_FULL, use lower limit
@@ -94,9 +93,11 @@ static unsigned long get_target_state(struct thermal_instance *instance,
 			if (!throttle)
 				next_target = THERMAL_NO_TARGET;
 		} else {
-			next_target = cur_state - 1;
-			if (next_target > instance->upper)
-				next_target = instance->upper;
+			if (!throttle) {
+				next_target = cur_state - 1;
+				if (next_target > instance->upper)
+					next_target = instance->upper;
+			}
 		}
 		break;
 	case THERMAL_TREND_DROP_FULL:

drivers/thermal/tegra/soctherm.c

@@ -483,7 +483,7 @@ static int throttrip_program(struct device *dev,
 	unsigned int throt;
 	u32 r, reg_off;
 
-	if (!dev || !sg || !stc || !stc->init)
+	if (!sg || !stc || !stc->init)
 		return -EINVAL;
 
 	temp = enforce_temp_range(dev, trip_temp) / ts->soc->thresh_grain;

drivers/thermal/thermal-generic-adc.c

@@ -126,37 +126,22 @@ static int gadc_thermal_probe(struct platform_device *pdev)
 	gti->dev = &pdev->dev;
 	platform_set_drvdata(pdev, gti);
 
-	gti->channel = iio_channel_get(&pdev->dev, "sensor-channel");
+	gti->channel = devm_iio_channel_get(&pdev->dev, "sensor-channel");
 	if (IS_ERR(gti->channel)) {
 		ret = PTR_ERR(gti->channel);
 		dev_err(&pdev->dev, "IIO channel not found: %d\n", ret);
 		return ret;
 	}
 
-	gti->tz_dev = thermal_zone_of_sensor_register(&pdev->dev, 0,
-						      gti, &gadc_thermal_ops);
+	gti->tz_dev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, gti,
+							   &gadc_thermal_ops);
 	if (IS_ERR(gti->tz_dev)) {
 		ret = PTR_ERR(gti->tz_dev);
 		dev_err(&pdev->dev, "Thermal zone sensor register failed: %d\n",
 			ret);
-		goto sensor_fail;
+		return ret;
 	}
 
-	return 0;
-
-sensor_fail:
-	iio_channel_release(gti->channel);
-
-	return ret;
-}
-
-static int gadc_thermal_remove(struct platform_device *pdev)
-{
-	struct gadc_thermal_info *gti = platform_get_drvdata(pdev);
-
-	thermal_zone_of_sensor_unregister(&pdev->dev, gti->tz_dev);
-	iio_channel_release(gti->channel);
-
 	return 0;
 }
 
@@ -172,7 +157,6 @@ static struct platform_driver gadc_thermal_driver = {
 		.of_match_table = of_adc_thermal_match,
 	},
 	.probe = gadc_thermal_probe,
-	.remove = gadc_thermal_remove,
 };
 
 module_platform_driver(gadc_thermal_driver);

drivers/thermal/ti-soc-thermal/ti-thermal-common.c

@@ -278,7 +278,8 @@ int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id)
 
 	if (data) {
 		cpufreq_cooling_unregister(data->cool_dev);
-		cpufreq_cpu_put(data->policy);
+		if (data->policy)
+			cpufreq_cpu_put(data->policy);
 	}
 
 	return 0;

include/linux/thermal.h

@@ -488,7 +488,7 @@ static inline int power_actor_set_power(struct thermal_cooling_device *cdev,
 static inline struct thermal_zone_device *thermal_zone_device_register(
 	const char *type, int trips, int mask, void *devdata,
 	struct thermal_zone_device_ops *ops,
-	const struct thermal_zone_params *tzp,
+	struct thermal_zone_params *tzp,
 	int passive_delay, int polling_delay)
 { return ERR_PTR(-ENODEV); }
 static inline void thermal_zone_device_unregister(

tools/thermal/tmon/Makefile

 # SPDX-License-Identifier: GPL-2.0
+# We need this for the "cc-option" macro.
+include ../../../scripts/Kbuild.include
+
 VERSION = 1.0
 
 BINDIR=usr/bin
 WARNFLAGS=-Wall -Wshadow -W -Wformat -Wimplicit-function-declaration -Wimplicit-int
-CFLAGS+= -O1 ${WARNFLAGS} -fstack-protector
-CC=$(CROSS_COMPILE)gcc
+CFLAGS+= -O1 ${WARNFLAGS}
+# Add "-fstack-protector" only if toolchain supports it.
+CFLAGS+= $(call cc-option,-fstack-protector)
+CC?= $(CROSS_COMPILE)gcc
+PKG_CONFIG?= pkg-config
 
 CFLAGS+=-D VERSION=\"$(VERSION)\"
 LDFLAGS+=
@@ -19,12 +25,12 @@ STATIC := --static
 endif
 
 TMON_LIBS=-lm -lpthread
-TMON_LIBS += $(shell pkg-config --libs $(STATIC) panelw ncursesw 2> /dev/null || \
-		     pkg-config --libs $(STATIC) panel ncurses 2> /dev/null || \
+TMON_LIBS += $(shell $(PKG_CONFIG) --libs $(STATIC) panelw ncursesw 2> /dev/null || \
+		     $(PKG_CONFIG) --libs $(STATIC) panel ncurses 2> /dev/null || \
 		     echo -lpanel -lncurses)
 
-CFLAGS    += $(shell pkg-config --cflags $(STATIC) panelw ncursesw 2> /dev/null || \
-		     pkg-config --cflags $(STATIC) panel ncurses 2> /dev/null)
+CFLAGS    += $(shell $(PKG_CONFIG) --cflags $(STATIC) panelw ncursesw 2> /dev/null || \
+		     $(PKG_CONFIG) --cflags $(STATIC) panel ncurses 2> /dev/null)
 
 OBJS = tmon.o tui.o sysfs.o pid.o
 OBJS +=