Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into thermal-soc

8 files changed, 297 insertions, 186 deletions

diff --git a/Documentation/devicetree/bindings/thermal/armada-thermal.txt b/Documentation/devicetree/bindings/thermal/armada-thermal.txt
index 24aacf8948c5..e0d013a2e66d 100644
--- a/Documentation/devicetree/bindings/thermal/armada-thermal.txt
+++ b/Documentation/devicetree/bindings/thermal/armada-thermal.txt
@@ -2,22 +2,35 @@
 
 Required properties:
 
-- compatible:	Should be set to one of the following:
-		marvell,armada370-thermal
-		marvell,armada375-thermal
-		marvell,armada380-thermal
-		marvell,armadaxp-thermal
+- compatible: Should be set to one of the following:
+    * marvell,armada370-thermal
+    * marvell,armada375-thermal
+    * marvell,armada380-thermal
+    * marvell,armadaxp-thermal
+    * marvell,armada-ap806-thermal
+    * marvell,armada-cp110-thermal
 
-- reg:		Device's register space.
-		Two entries are expected, see the examples below.
-		The first one is required for the sensor register;
-		the second one is required for the control register
-		to be used for sensor initialization (a.k.a. calibration).
+- reg: Device's register space.
+  Two entries are expected, see the examples below. The first one points
+  to the status register (4B). The second one points to the control
+  registers (8B).
+  Note: The compatibles marvell,armada370-thermal,
+  marvell,armada380-thermal, and marvell,armadaxp-thermal must point to
+  "control MSB/control 1", with size of 4 (deprecated binding), or point
+  to "control LSB/control 0" with size of 8 (current binding). All other
+  compatibles must point to "control LSB/control 0" with size of 8.
 
-Example:
+Examples:
 
+	/* Legacy bindings */
 	thermal@d0018300 {
 		compatible = "marvell,armada370-thermal";
-                reg = <0xd0018300 0x4
+		reg = <0xd0018300 0x4
 		       0xd0018304 0x4>;
 	};
+
+	ap_thermal: thermal@6f8084 {
+		compatible = "marvell,armada-ap806-thermal";
+		reg = <0x6f808C 0x4>,
+		      <0x6f8084 0x8>;
+	};
diff --git a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
index a8e52c8ccfcc..349e635f2d87 100644
--- a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
+++ b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
@@ -6,6 +6,7 @@ Required properties:
 			   "renesas,rcar-thermal" (without thermal-zone) as fallback.
 			  Examples with soctypes are:
 			    - "renesas,thermal-r8a73a4" (R-Mobile APE6)
+			    - "renesas,thermal-r8a7743" (RZ/G1M)
 			    - "renesas,thermal-r8a7779" (R-Car H1)
 			    - "renesas,thermal-r8a7790" (R-Car H2)
 			    - "renesas,thermal-r8a7791" (R-Car M2-W)
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 315ae2926e20..b6adc54b96f1 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -301,13 +301,13 @@ config DB8500_THERMAL
 	  thermal zone if trip points reached.
 
 config ARMADA_THERMAL
-	tristate "Armada 370/XP thermal management"
+	tristate "Marvell EBU Armada SoCs thermal management"
 	depends on ARCH_MVEBU || COMPILE_TEST
 	depends on HAS_IOMEM
 	depends on OF
 	help
 	  Enable this option if you want to have support for thermal management
-	  controller present in Armada 370 and Armada XP SoC.
+	  controller present in Marvell EBU Armada SoCs (370,375,XP,38x,7K,8K).
 
 config DA9062_THERMAL
 	tristate "DA9062/DA9061 Dialog Semiconductor thermal driver"
diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index 706d74798cbe..4c275ec10ac5 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -1,5 +1,5 @@
 /*
- * Marvell Armada 370/XP thermal sensor driver
+ * Marvell EBU Armada SoCs thermal sensor driver
  *
  * Copyright (C) 2013 Marvell
  *
@@ -23,8 +23,7 @@
 #include <linux/platform_device.h>
 #include <linux/of_device.h>
 #include <linux/thermal.h>
-
-#define THERMAL_VALID_MASK		0x1
+#include <linux/iopoll.h>
 
 /* Thermal Manager Control and Status Register */
 #define PMU_TDC0_SW_RST_MASK		(0x1 << 1)
@@ -39,14 +38,38 @@
 #define A375_UNIT_CONTROL_MASK		0x7
 #define A375_READOUT_INVERT		BIT(15)
 #define A375_HW_RESETn			BIT(8)
-#define A380_HW_RESET			BIT(8)
+
+/* Legacy bindings */
+#define LEGACY_CONTROL_MEM_LEN		0x4
+
+/* Current bindings with the 2 control registers under the same memory area */
+#define LEGACY_CONTROL1_OFFSET		0x0
+#define CONTROL0_OFFSET			0x0
+#define CONTROL1_OFFSET			0x4
+
+/* Errata fields */
+#define CONTROL0_TSEN_TC_TRIM_MASK	0x7
+#define CONTROL0_TSEN_TC_TRIM_VAL	0x3
+
+/* TSEN refers to the temperature sensors within the AP */
+#define CONTROL0_TSEN_START		BIT(0)
+#define CONTROL0_TSEN_RESET		BIT(1)
+#define CONTROL0_TSEN_ENABLE		BIT(2)
+
+/* EXT_TSEN refers to the external temperature sensors, out of the AP */
+#define CONTROL1_EXT_TSEN_SW_RESET	BIT(7)
+#define CONTROL1_EXT_TSEN_HW_RESETn	BIT(8)
+
+#define STATUS_POLL_PERIOD_US		1000
+#define STATUS_POLL_TIMEOUT_US		100000
 
 struct armada_thermal_data;
 
 /* Marvell EBU Thermal Sensor Dev Structure */
 struct armada_thermal_priv {
-	void __iomem *sensor;
-	void __iomem *control;
+	void __iomem *status;
+	void __iomem *control0;
+	void __iomem *control1;
 	struct armada_thermal_data *data;
 };
 
@@ -59,107 +82,142 @@ struct armada_thermal_data {
 	bool (*is_valid)(struct armada_thermal_priv *);
 
 	/* Formula coeficients: temp = (b - m * reg) / div */
-	unsigned long coef_b;
-	unsigned long coef_m;
-	unsigned long coef_div;
+	s64 coef_b;
+	s64 coef_m;
+	u32 coef_div;
 	bool inverted;
+	bool signed_sample;
 
 	/* Register shift and mask to access the sensor temperature */
 	unsigned int temp_shift;
 	unsigned int temp_mask;
-	unsigned int is_valid_shift;
+	u32 is_valid_bit;
+	bool needs_control0;
 };
 
 static void armadaxp_init_sensor(struct platform_device *pdev,
 				 struct armada_thermal_priv *priv)
 {
-	unsigned long reg;
+	u32 reg;
 
-	reg = readl_relaxed(priv->control);
+	reg = readl_relaxed(priv->control1);
 	reg |= PMU_TDC0_OTF_CAL_MASK;
-	writel(reg, priv->control);
+	writel(reg, priv->control1);
 
 	/* Reference calibration value */
 	reg &= ~PMU_TDC0_REF_CAL_CNT_MASK;
 	reg |= (0xf1 << PMU_TDC0_REF_CAL_CNT_OFFS);
-	writel(reg, priv->control);
+	writel(reg, priv->control1);
 
 	/* Reset the sensor */
-	reg = readl_relaxed(priv->control);
-	writel((reg | PMU_TDC0_SW_RST_MASK), priv->control);
+	reg = readl_relaxed(priv->control1);
+	writel((reg | PMU_TDC0_SW_RST_MASK), priv->control1);
 
-	writel(reg, priv->control);
+	writel(reg, priv->control1);
 
 	/* Enable the sensor */
-	reg = readl_relaxed(priv->sensor);
+	reg = readl_relaxed(priv->status);
 	reg &= ~PMU_TM_DISABLE_MASK;
-	writel(reg, priv->sensor);
+	writel(reg, priv->status);
 }
 
 static void armada370_init_sensor(struct platform_device *pdev,
 				  struct armada_thermal_priv *priv)
 {
-	unsigned long reg;
+	u32 reg;
 
-	reg = readl_relaxed(priv->control);
+	reg = readl_relaxed(priv->control1);
 	reg |= PMU_TDC0_OTF_CAL_MASK;
-	writel(reg, priv->control);
+	writel(reg, priv->control1);
 
 	/* Reference calibration value */
 	reg &= ~PMU_TDC0_REF_CAL_CNT_MASK;
 	reg |= (0xf1 << PMU_TDC0_REF_CAL_CNT_OFFS);
-	writel(reg, priv->control);
+	writel(reg, priv->control1);
 
 	reg &= ~PMU_TDC0_START_CAL_MASK;
-	writel(reg, priv->control);
+	writel(reg, priv->control1);
 
-	mdelay(10);
+	msleep(10);
 }
 
 static void armada375_init_sensor(struct platform_device *pdev,
 				  struct armada_thermal_priv *priv)
 {
-	unsigned long reg;
+	u32 reg;
 
-	reg = readl(priv->control + 4);
+	reg = readl(priv->control1);
 	reg &= ~(A375_UNIT_CONTROL_MASK << A375_UNIT_CONTROL_SHIFT);
 	reg &= ~A375_READOUT_INVERT;
 	reg &= ~A375_HW_RESETn;
 
-	writel(reg, priv->control + 4);
-	mdelay(20);
+	writel(reg, priv->control1);
+	msleep(20);
 
 	reg |= A375_HW_RESETn;
-	writel(reg, priv->control + 4);
-	mdelay(50);
+	writel(reg, priv->control1);
+	msleep(50);
+}
+
+static void armada_wait_sensor_validity(struct armada_thermal_priv *priv)
+{
+	u32 reg;
+
+	readl_relaxed_poll_timeout(priv->status, reg,
+				   reg & priv->data->is_valid_bit,
+				   STATUS_POLL_PERIOD_US,
+				   STATUS_POLL_TIMEOUT_US);
 }
 
 static void armada380_init_sensor(struct platform_device *pdev,
 				  struct armada_thermal_priv *priv)
 {
-	unsigned long reg = readl_relaxed(priv->control);
-
-	/* Reset hardware once */
-	if (!(reg & A380_HW_RESET)) {
-		reg |= A380_HW_RESET;
-		writel(reg, priv->control);
-		mdelay(10);
+	u32 reg = readl_relaxed(priv->control1);
+
+	/* Disable the HW/SW reset */
+	reg |= CONTROL1_EXT_TSEN_HW_RESETn;
+	reg &= ~CONTROL1_EXT_TSEN_SW_RESET;
+	writel(reg, priv->control1);
+
+	/* Set Tsen Tc Trim to correct default value (errata #132698) */
+	if (priv->control0) {
+		reg = readl_relaxed(priv->control0);
+		reg &= ~CONTROL0_TSEN_TC_TRIM_MASK;
+		reg |= CONTROL0_TSEN_TC_TRIM_VAL;
+		writel(reg, priv->control0);
 	}
+
+	/* Wait the sensors to be valid or the core will warn the user */
+	armada_wait_sensor_validity(priv);
+}
+
+static void armada_ap806_init_sensor(struct platform_device *pdev,
+				     struct armada_thermal_priv *priv)
+{
+	u32 reg;
+
+	reg = readl_relaxed(priv->control0);
+	reg &= ~CONTROL0_TSEN_RESET;
+	reg |= CONTROL0_TSEN_START | CONTROL0_TSEN_ENABLE;
+	writel(reg, priv->control0);
+
+	/* Wait the sensors to be valid or the core will warn the user */
+	armada_wait_sensor_validity(priv);
 }
 
 static bool armada_is_valid(struct armada_thermal_priv *priv)
 {
-	unsigned long reg = readl_relaxed(priv->sensor);
+	u32 reg = readl_relaxed(priv->status);
 
-	return (reg >> priv->data->is_valid_shift) & THERMAL_VALID_MASK;
+	return reg & priv->data->is_valid_bit;
 }
 
 static int armada_get_temp(struct thermal_zone_device *thermal,
-			  int *temp)
+			   int *temp)
 {
 	struct armada_thermal_priv *priv = thermal->devdata;
-	unsigned long reg;
-	unsigned long m, b, div;
+	u32 reg, div;
+	s64 sample, b, m;
 
 	/* Valid check */
 	if (priv->data->is_valid && !priv->data->is_valid(priv)) {
@@ -168,8 +226,13 @@ static int armada_get_temp(struct thermal_zone_device *thermal,
 		return -EIO;
 	}
 
-	reg = readl_relaxed(priv->sensor);
+	reg = readl_relaxed(priv->status);
 	reg = (reg >> priv->data->temp_shift) & priv->data->temp_mask;
+	if (priv->data->signed_sample)
+		/* The most significant bit is the sign bit */
+		sample = sign_extend32(reg, fls(priv->data->temp_mask) - 1);
+	else
+		sample = reg;
 
 	/* Get formula coeficients */
 	b = priv->data->coef_b;
@@ -177,9 +240,10 @@ static int armada_get_temp(struct thermal_zone_device *thermal,
 	div = priv->data->coef_div;
 
 	if (priv->data->inverted)
-		*temp = ((m * reg) - b) / div;
+		*temp = div_s64((m * sample) - b, div);
 	else
-		*temp = (b - (m * reg)) / div;
+		*temp = div_s64(b - (m * sample), div);
+
 	return 0;
 }
 
@@ -191,45 +255,73 @@ static const struct armada_thermal_data armadaxp_data = {
 	.init_sensor = armadaxp_init_sensor,
 	.temp_shift = 10,
 	.temp_mask = 0x1ff,
-	.coef_b = 3153000000UL,
-	.coef_m = 10000000UL,
+	.coef_b = 3153000000ULL,
+	.coef_m = 10000000ULL,
 	.coef_div = 13825,
 };
 
 static const struct armada_thermal_data armada370_data = {
 	.is_valid = armada_is_valid,
 	.init_sensor = armada370_init_sensor,
-	.is_valid_shift = 9,
+	.is_valid_bit = BIT(9),
 	.temp_shift = 10,
 	.temp_mask = 0x1ff,
-	.coef_b = 3153000000UL,
-	.coef_m = 10000000UL,
+	.coef_b = 3153000000ULL,
+	.coef_m = 10000000ULL,
 	.coef_div = 13825,
 };
 
 static const struct armada_thermal_data armada375_data = {
 	.is_valid = armada_is_valid,
 	.init_sensor = armada375_init_sensor,
-	.is_valid_shift = 10,
+	.is_valid_bit = BIT(10),
 	.temp_shift = 0,
 	.temp_mask = 0x1ff,
-	.coef_b = 3171900000UL,
-	.coef_m = 10000000UL,
+	.coef_b = 3171900000ULL,
+	.coef_m = 10000000ULL,
 	.coef_div = 13616,
+	.needs_control0 = true,
 };
 
 static const struct armada_thermal_data armada380_data = {
 	.is_valid = armada_is_valid,
 	.init_sensor = armada380_init_sensor,
-	.is_valid_shift = 10,
+	.is_valid_bit = BIT(10),
 	.temp_shift = 0,
 	.temp_mask = 0x3ff,
-	.coef_b = 1172499100UL,
-	.coef_m = 2000096UL,
+	.coef_b = 1172499100ULL,
+	.coef_m = 2000096ULL,
 	.coef_div = 4201,
 	.inverted = true,
 };
 
+static const struct armada_thermal_data armada_ap806_data = {
+	.is_valid = armada_is_valid,
+	.init_sensor = armada_ap806_init_sensor,
+	.is_valid_bit = BIT(16),
+	.temp_shift = 0,
+	.temp_mask = 0x3ff,
+	.coef_b = -150000LL,
+	.coef_m = 423ULL,
+	.coef_div = 1,
+	.inverted = true,
+	.signed_sample = true,
+	.needs_control0 = true,
+};
+
+static const struct armada_thermal_data armada_cp110_data = {
+	.is_valid = armada_is_valid,
+	.init_sensor = armada380_init_sensor,
+	.is_valid_bit = BIT(10),
+	.temp_shift = 0,
+	.temp_mask = 0x3ff,
+	.coef_b = 1172499100ULL,
+	.coef_m = 2000096ULL,
+	.coef_div = 4201,
+	.inverted = true,
+	.needs_control0 = true,
+};
+
 static const struct of_device_id armada_thermal_id_table[] = {
 	{
 		.compatible = "marvell,armadaxp-thermal",
@@ -248,6 +340,14 @@ static const struct of_device_id armada_thermal_id_table[] = {
 		.data       = &armada380_data,
 	},
 	{
+		.compatible = "marvell,armada-ap806-thermal",
+		.data       = &armada_ap806_data,
+	},
+	{
+		.compatible = "marvell,armada-cp110-thermal",
+		.data       = &armada_cp110_data,
+	},
+	{
 		/* sentinel */
 	},
 };
@@ -255,6 +355,7 @@ MODULE_DEVICE_TABLE(of, armada_thermal_id_table);
 
 static int armada_thermal_probe(struct platform_device *pdev)
 {
+	void __iomem *control = NULL;
 	struct thermal_zone_device *thermal;
 	const struct of_device_id *match;
 	struct armada_thermal_priv *priv;
@@ -269,20 +370,40 @@ static int armada_thermal_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	priv->sensor = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(priv->sensor))
-		return PTR_ERR(priv->sensor);
+	priv->status = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(priv->status))
+		return PTR_ERR(priv->status);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	priv->control = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(priv->control))
-		return PTR_ERR(priv->control);
+	control = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(control))
+		return PTR_ERR(control);
 
 	priv->data = (struct armada_thermal_data *)match->data;
+
+	/*
+	 * Legacy DT bindings only described "control1" register (also referred
+	 * as "control MSB" on old documentation). New bindings cover
+	 * "control0/control LSB" and "control1/control MSB" registers within
+	 * the same resource, which is then of size 8 instead of 4.
+	 */
+	if (resource_size(res) == LEGACY_CONTROL_MEM_LEN) {
+		/* ->control0 unavailable in this configuration */
+		if (priv->data->needs_control0) {
+			dev_err(&pdev->dev, "No access to control0 register\n");
+			return -EINVAL;
+		}
+
+		priv->control1 = control + LEGACY_CONTROL1_OFFSET;
+	} else {
+		priv->control0 = control + CONTROL0_OFFSET;
+		priv->control1 = control + CONTROL1_OFFSET;
+	}
+
 	priv->data->init_sensor(pdev, priv);
 
-	thermal = thermal_zone_device_register("armada_thermal", 0, 0,
-					       priv, &ops, NULL, 0, 0);
+	thermal = thermal_zone_device_register(dev_name(&pdev->dev), 0, 0, priv,
+					       &ops, NULL, 0, 0);
 	if (IS_ERR(thermal)) {
 		dev_err(&pdev->dev,
 			"Failed to register thermal zone device\n");
@@ -316,5 +437,5 @@ static struct platform_driver armada_thermal_driver = {
 module_platform_driver(armada_thermal_driver);
 
 MODULE_AUTHOR("Ezequiel Garcia <ezequiel.garcia@free-electrons.com>");
-MODULE_DESCRIPTION("Armada 370/XP thermal driver");
+MODULE_DESCRIPTION("Marvell EBU Armada SoCs thermal driver");
 MODULE_LICENSE("GPL v2");
diff --git a/drivers/thermal/hisi_thermal.c b/drivers/thermal/hisi_thermal.c
index 2d855a96cdd9..761d0559c268 100644
--- a/drivers/thermal/hisi_thermal.c
+++ b/drivers/thermal/hisi_thermal.c
@@ -527,7 +527,7 @@ static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor,
 static int hisi_thermal_probe(struct platform_device *pdev)
 {
 	struct hisi_thermal_data *data;
-	int const (*platform_probe)(struct hisi_thermal_data *);
+	int (*platform_probe)(struct hisi_thermal_data *);
 	struct device *dev = &pdev->dev;
 	int ret;
 
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index e7d4ffc3de7f..a67781b7a0b2 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -70,10 +70,6 @@ enum imx_thermal_trip {
 #define IMX_POLLING_DELAY		2000 /* millisecond */
 #define IMX_PASSIVE_DELAY		1000
 
-#define FACTOR0				10000000
-#define FACTOR1				15976
-#define FACTOR2				4297157
-
 #define TEMPMON_IMX6Q			1
 #define TEMPMON_IMX6SX			2
 
@@ -347,78 +343,74 @@ static struct thermal_zone_device_ops imx_tz_ops = {
 	.set_trip_temp = imx_set_trip_temp,
 };
 
-static int imx_init_calib(struct platform_device *pdev, u32 val)
+static int imx_init_calib(struct platform_device *pdev, u32 ocotp_ana1)
 {
 	struct imx_thermal_data *data = platform_get_drvdata(pdev);
-	int t1, n1;
+	int n1;
 	u64 temp64;
 
-	if (val == 0 || val == ~0) {
+	if (ocotp_ana1 == 0 || ocotp_ana1 == ~0) {
 		dev_err(&pdev->dev, "invalid sensor calibration data\n");
 		return -EINVAL;
 	}
 
 	/*
-	 * Sensor data layout:
-	 *   [31:20] - sensor value @ 25C
-	 * Use universal formula now and only need sensor value @ 25C
-	 * slope = 0.4297157 - (0.0015976 * 25C fuse)
+	 * The sensor is calibrated at 25 °C (aka T1) and the value measured
+	 * (aka N1) at this temperature is provided in bits [31:20] in the
+	 * i.MX's OCOTP value ANA1.
+	 * To find the actual temperature T, the following formula has to be used
+	 * when reading value n from the sensor:
+	 *
+	 * T = T1 + (N - N1) / (0.4148468 - 0.0015423 * N1) °C + 3.580661 °C
+	 *   = [T1' - N1 / (0.4148468 - 0.0015423 * N1) °C] + N / (0.4148468 - 0.0015423 * N1) °C
+	 *   = [T1' + N1 / (0.0015423 * N1 - 0.4148468) °C] - N / (0.0015423 * N1 - 0.4148468) °C
+	 *   = c2 - c1 * N
+	 *
+	 * with
+	 *
+	 *  T1' = 28.580661 °C
+	 *   c1 = 1 / (0.0015423 * N1 - 0.4297157) °C
+	 *   c2 = T1' + N1 / (0.0015423 * N1 - 0.4148468) °C
+	 *      = T1' + N1 * c1
 	 */
-	n1 = val >> 20;
-	t1 = 25; /* t1 always 25C */
+	n1 = ocotp_ana1 >> 20;
 
-	/*
-	 * Derived from linear interpolation:
-	 * slope = 0.4297157 - (0.0015976 * 25C fuse)
-	 * slope = (FACTOR2 - FACTOR1 * n1) / FACTOR0
-	 * (Nmeas - n1) / (Tmeas - t1) = slope
-	 * 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...
-	 * Tmeas = (Nmeas - n1) / slope + t1
-	 * milli_Tmeas = 1000 * (Nmeas - n1) / slope + 1000 * t1
-	 * milli_Tmeas = -1000 * (n1 - Nmeas) / slope + 1000 * t1
-	 * Let constant c1 = (-1000 / slope)
-	 * milli_Tmeas = (n1 - Nmeas) * c1 + 1000 * t1
-	 * Let constant c2 = n1 *c1 + 1000 * t1
-	 * milli_Tmeas = c2 - Nmeas * c1
-	 */
-	temp64 = FACTOR0;
-	temp64 *= 1000;
-	do_div(temp64, FACTOR1 * n1 - FACTOR2);
+	temp64 = 10000000; /* use 10^7 as fixed point constant for values in formula */
+	temp64 *= 1000; /* to get result in °mC */
+	do_div(temp64, 15423 * n1 - 4148468);
 	data->c1 = temp64;
-	data->c2 = n1 * data->c1 + 1000 * t1;
+	data->c2 = n1 * data->c1 + 28581;
 
 	return 0;
 }
 
-static void imx_init_temp_grade(struct platform_device *pdev, u32 val)
+static void imx_init_temp_grade(struct platform_device *pdev, u32 ocotp_mem0)
 {
 	struct imx_thermal_data *data = platform_get_drvdata(pdev);
 
 	/* The maximum die temp is specified by the Temperature Grade */
-	switch ((val >> 6) & 0x3) {
-	case 0: /* Commercial (0 to 95C) */
+	switch ((ocotp_mem0 >> 6) & 0x3) {
+	case 0: /* Commercial (0 to 95 °C) */
 		data->temp_grade = "Commercial";
 		data->temp_max = 95000;
 		break;
-	case 1: /* Extended Commercial (-20 to 105C) */
+	case 1: /* Extended Commercial (-20 °C to 105 °C) */
 		data->temp_grade = "Extended Commercial";
 		data->temp_max = 105000;
 		break;
-	case 2: /* Industrial (-40 to 105C) */
+	case 2: /* Industrial (-40 °C to 105 °C) */
 		data->temp_grade = "Industrial";
 		data->temp_max = 105000;
 		break;
-	case 3: /* Automotive (-40 to 125C) */
+	case 3: /* Automotive (-40 °C to 125 °C) */
 		data->temp_grade = "Automotive";
 		data->temp_max = 125000;
 		break;
 	}
 
 	/*
-	 * Set the critical trip point at 5C under max
-	 * Set the passive trip point at 10C under max (can change via sysfs)
+	 * Set the critical trip point at 5 °C under max
+	 * Set the passive trip point at 10 °C under max (changeable via sysfs)
 	 */
 	data->temp_critical = data->temp_max - (1000 * 5);
 	data->temp_passive = data->temp_max - (1000 * 10);
diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
index 1e61c09153c9..c75661a3801a 100644
--- a/drivers/thermal/mtk_thermal.c
+++ b/drivers/thermal/mtk_thermal.c
@@ -32,15 +32,10 @@
 #include <linux/types.h>
 
 /* AUXADC Registers */
-#define AUXADC_CON0_V		0x000
-#define AUXADC_CON1_V		0x004
 #define AUXADC_CON1_SET_V	0x008
 #define AUXADC_CON1_CLR_V	0x00c
 #define AUXADC_CON2_V		0x010
 #define AUXADC_DATA(channel)	(0x14 + (channel) * 4)
-#define AUXADC_MISC_V		0x094
-
-#define AUXADC_CON1_CHANNEL(x)	BIT(x)
 
 #define APMIXED_SYS_TS_CON1	0x604
 
@@ -158,8 +153,6 @@
 /* The number of sensing points per bank */
 #define MT2712_NUM_SENSORS_PER_ZONE	4
 
-#define THERMAL_NAME    "mtk-thermal"
-
 struct mtk_thermal;
 
 struct thermal_bank_cfg {
@@ -765,7 +758,7 @@ static struct platform_driver mtk_thermal_driver = {
 	.probe = mtk_thermal_probe,
 	.remove = mtk_thermal_remove,
 	.driver = {
-		.name = THERMAL_NAME,
+		.name = "mtk-thermal",
 		.of_match_table = mtk_thermal_of_match,
 	},
 };
diff --git a/drivers/thermal/tegra/soctherm.c b/drivers/thermal/tegra/soctherm.c
index 075db1de5e53..455b58ce2652 100644
--- a/drivers/thermal/tegra/soctherm.c
+++ b/drivers/thermal/tegra/soctherm.c
@@ -341,62 +341,6 @@ static int tegra_thermctl_get_temp(void *data, int *out_temp)
 	return 0;
 }
 
-static int
-thermtrip_program(struct device *dev, const struct tegra_tsensor_group *sg,
-		  int trip_temp);
-static int
-throttrip_program(struct device *dev, const struct tegra_tsensor_group *sg,
-		  struct soctherm_throt_cfg *stc, int trip_temp);
-static struct soctherm_throt_cfg *
-find_throttle_cfg_by_name(struct tegra_soctherm *ts, const char *name);
-
-static int tegra_thermctl_set_trip_temp(void *data, int trip, int temp)
-{
-	struct tegra_thermctl_zone *zone = data;
-	struct thermal_zone_device *tz = zone->tz;
-	struct tegra_soctherm *ts = zone->ts;
-	const struct tegra_tsensor_group *sg = zone->sg;
-	struct device *dev = zone->dev;
-	enum thermal_trip_type type;
-	int ret;
-
-	if (!tz)
-		return -EINVAL;
-
-	ret = tz->ops->get_trip_type(tz, trip, &type);
-	if (ret)
-		return ret;
-
-	if (type == THERMAL_TRIP_CRITICAL) {
-		return thermtrip_program(dev, sg, temp);
-	} else if (type == THERMAL_TRIP_HOT) {
-		int i;
-
-		for (i = 0; i < THROTTLE_SIZE; i++) {
-			struct thermal_cooling_device *cdev;
-			struct soctherm_throt_cfg *stc;
-
-			if (!ts->throt_cfgs[i].init)
-				continue;
-
-			cdev = ts->throt_cfgs[i].cdev;
-			if (get_thermal_instance(tz, cdev, trip))
-				stc = find_throttle_cfg_by_name(ts, cdev->type);
-			else
-				continue;
-
-			return throttrip_program(dev, sg, stc, temp);
-		}
-	}
-
-	return 0;
-}
-
-static const struct thermal_zone_of_device_ops tegra_of_thermal_ops = {
-	.get_temp = tegra_thermctl_get_temp,
-	.set_trip_temp = tegra_thermctl_set_trip_temp,
-};
-
 /**
  * enforce_temp_range() - check and enforce temperature range [min, max]
  * @trip_temp: the trip temperature to check
@@ -527,6 +471,53 @@ find_throttle_cfg_by_name(struct tegra_soctherm *ts, const char *name)
 	return NULL;
 }
 
+static int tegra_thermctl_set_trip_temp(void *data, int trip, int temp)
+{
+	struct tegra_thermctl_zone *zone = data;
+	struct thermal_zone_device *tz = zone->tz;
+	struct tegra_soctherm *ts = zone->ts;
+	const struct tegra_tsensor_group *sg = zone->sg;
+	struct device *dev = zone->dev;
+	enum thermal_trip_type type;
+	int ret;
+
+	if (!tz)
+		return -EINVAL;
+
+	ret = tz->ops->get_trip_type(tz, trip, &type);
+	if (ret)
+		return ret;
+
+	if (type == THERMAL_TRIP_CRITICAL) {
+		return thermtrip_program(dev, sg, temp);
+	} else if (type == THERMAL_TRIP_HOT) {
+		int i;
+
+		for (i = 0; i < THROTTLE_SIZE; i++) {
+			struct thermal_cooling_device *cdev;
+			struct soctherm_throt_cfg *stc;
+
+			if (!ts->throt_cfgs[i].init)
+				continue;
+
+			cdev = ts->throt_cfgs[i].cdev;
+			if (get_thermal_instance(tz, cdev, trip))
+				stc = find_throttle_cfg_by_name(ts, cdev->type);
+			else
+				continue;
+
+			return throttrip_program(dev, sg, stc, temp);
+		}
+	}
+
+	return 0;
+}
+
+static const struct thermal_zone_of_device_ops tegra_of_thermal_ops = {
+	.get_temp = tegra_thermctl_get_temp,
+	.set_trip_temp = tegra_thermctl_set_trip_temp,
+};
+
 static int get_hot_temp(struct thermal_zone_device *tz, int *trip, int *temp)
 {
 	int ntrips, i, ret;