[PATCH 1/2] ARM: dts: imx7s: add temperature monitor support

[PATCH 1/2] ARM: dts: imx7s: add temperature monitor support

[Anson Huang]

Add i.MX7 temperature monitor support.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
 .../devicetree/bindings/thermal/imx-thermal.txt      |  5 +++--
 arch/arm/boot/dts/imx7s.dtsi                         | 20 ++++++++++++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/thermal/imx-thermal.txt b/Documentation/devicetree/bindings/thermal/imx-thermal.txt
index 28be51a..9575d45 100644
--- a/Documentation/devicetree/bindings/thermal/imx-thermal.txt
+++ b/Documentation/devicetree/bindings/thermal/imx-thermal.txt
@@ -1,8 +1,9 @@
 * Temperature Monitor (TEMPMON) on Freescale i.MX SoCs
 
 Required properties:
-- compatible : "fsl,imx6q-tempmon" for i.MX6Q, "fsl,imx6sx-tempmon" for i.MX6SX.
-  i.MX6SX has two more IRQs than i.MX6Q, one is IRQ_LOW and the other is IRQ_PANIC,
+- compatible : "fsl,imx6q-tempmon" for i.MX6Q, "fsl,imx6sx-tempmon" for i.MX6SX,
+  "fsl,imx7-tempmon" for i.MX7S/D.
+  i.MX6SX and i.MX7S/D have two more IRQs than i.MX6Q, one is IRQ_LOW and the other is IRQ_PANIC,
   when temperature is below than low threshold, IRQ_LOW will be triggered, when temperature
   is higher than panic threshold, system will auto reboot by SRC module.
 - fsl,tempmon : phandle pointer to system controller that contains TEMPMON
diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi
index 82ad26e..2e2eda53 100644
--- a/arch/arm/boot/dts/imx7s.dtsi
+++ b/arch/arm/boot/dts/imx7s.dtsi
@@ -497,9 +497,29 @@
 			};
 
 			ocotp: ocotp-ctrl@30350000 {
+				#address-cells = <1>;
+				#size-cells = <1>;
 				compatible = "fsl,imx7d-ocotp", "syscon";
 				reg = <0x30350000 0x10000>;
 				clocks = <&clks IMX7D_OCOTP_CLK>;
+
+				tempmon_calib: calib@3c {
+					reg = <0x3c 0x4>;
+				};
+
+				tempmon_temp_grade: temp-grade@10 {
+					reg = <0x10 0x4>;
+				};
+			};
+
+			tempmon: tempmon {
+				compatible = "fsl,imx7-tempmon";
+				interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
+				fsl,tempmon =<&anatop>;
+				nvmem-cells = <&tempmon_calib>,
+					<&tempmon_temp_grade>;
+				nvmem-cell-names = "calib", "temp_grade";
+				clocks = <&clks IMX7D_PLL_SYS_MAIN_CLK>;
 			};
 
 			anatop: anatop@30360000 {
-- 
2.7.4

[PATCH 2/2] thermal: imx: add i.MX7 thermal sensor support

[Anson Huang]

This patch adds i.MX7 thermal sensor support, most
of the i.MX7 thermal sensor functions are same with
i.MX6 except the registers offset/layout, so we move
those registers offset/layout definitions to soc data
structure.

i.MX7 uses single calibration data @25C, the calibration
data is located at OCOTP offset 0x4F0, bit[17:9], the
formula is as below:

Tmeas = (Nmeas - n1) + 25; n1 is the fuse value for 25C.

Signed-off-by: Anson Huang <Anson.Huang-3arQi8VN3Tc@public.gmane.org>
Signed-off-by: Bai Ping <ping.bai-3arQi8VN3Tc@public.gmane.org>
---
 drivers/thermal/imx_thermal.c | 315 +++++++++++++++++++++++++++++++++---------
 1 file changed, 247 insertions(+), 68 deletions(-)

diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index e7d4ffc..b2a00d6 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -31,34 +31,58 @@
 #define REG_CLR		0x8
 #define REG_TOG		0xc
 
-#define MISC0				0x0150
-#define MISC0_REFTOP_SELBIASOFF		(1 << 3)
-#define MISC1				0x0160
-#define MISC1_IRQ_TEMPHIGH		(1 << 29)
+/* i.MX6 specific */
+#define IMX6_MISC0				0x0150
+#define IMX6_MISC0_REFTOP_SELBIASOFF		(1 << 3)
+#define IMX6_MISC1				0x0160
+#define IMX6_MISC1_IRQ_TEMPHIGH			(1 << 29)
 /* Below LOW and PANIC bits are only for TEMPMON_IMX6SX */
-#define MISC1_IRQ_TEMPLOW		(1 << 28)
-#define MISC1_IRQ_TEMPPANIC		(1 << 27)
-
-#define TEMPSENSE0			0x0180
-#define TEMPSENSE0_ALARM_VALUE_SHIFT	20
-#define TEMPSENSE0_ALARM_VALUE_MASK	(0xfff << TEMPSENSE0_ALARM_VALUE_SHIFT)
-#define TEMPSENSE0_TEMP_CNT_SHIFT	8
-#define TEMPSENSE0_TEMP_CNT_MASK	(0xfff << TEMPSENSE0_TEMP_CNT_SHIFT)
-#define TEMPSENSE0_FINISHED		(1 << 2)
-#define TEMPSENSE0_MEASURE_TEMP		(1 << 1)
-#define TEMPSENSE0_POWER_DOWN		(1 << 0)
-
-#define TEMPSENSE1			0x0190
-#define TEMPSENSE1_MEASURE_FREQ		0xffff
-/* Below TEMPSENSE2 is only for TEMPMON_IMX6SX */
-#define TEMPSENSE2			0x0290
-#define TEMPSENSE2_LOW_VALUE_SHIFT	0
-#define TEMPSENSE2_LOW_VALUE_MASK	0xfff
-#define TEMPSENSE2_PANIC_VALUE_SHIFT	16
-#define TEMPSENSE2_PANIC_VALUE_MASK	0xfff0000
+#define IMX6_MISC1_IRQ_TEMPLOW			(1 << 28)
+#define IMX6_MISC1_IRQ_TEMPPANIC		(1 << 27)
+
+#define IMX6_TEMPSENSE0				0x0180
+#define IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT	20
+#define IMX6_TEMPSENSE0_ALARM_VALUE_MASK	(0xfff << 20)
+#define IMX6_TEMPSENSE0_TEMP_CNT_SHIFT		8
+#define IMX6_TEMPSENSE0_TEMP_CNT_MASK		(0xfff << 8)
+#define IMX6_TEMPSENSE0_FINISHED		(1 << 2)
+#define IMX6_TEMPSENSE0_MEASURE_TEMP		(1 << 1)
+#define IMX6_TEMPSENSE0_POWER_DOWN		(1 << 0)
+
+#define IMX6_TEMPSENSE1				0x0190
+#define IMX6_TEMPSENSE1_MEASURE_FREQ		0xffff
+#define IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT	0
 
-#define OCOTP_MEM0			0x0480
-#define OCOTP_ANA1			0x04e0
+/* Below TEMPSENSE2 is only for TEMPMON_IMX6SX */
+#define IMX6_TEMPSENSE2				0x0290
+#define IMX6_TEMPSENSE2_LOW_VALUE_SHIFT		0
+#define IMX6_TEMPSENSE2_LOW_VALUE_MASK		0xfff
+#define IMX6_TEMPSENSE2_PANIC_VALUE_SHIFT	16
+#define IMX6_TEMPSENSE2_PANIC_VALUE_MASK	0xfff0000
+
+/* i.MX7 specific */
+#define IMX7_ANADIG_DIGPROG			0x800
+#define IMX7_TEMPSENSE0				0x300
+#define IMX7_TEMPSENSE0_PANIC_ALARM_SHIFT	18
+#define IMX7_TEMPSENSE0_PANIC_ALARM_MASK	(0x1ff << 18)
+#define IMX7_TEMPSENSE0_HIGH_ALARM_SHIFT	9
+#define IMX7_TEMPSENSE0_HIGH_ALARM_MASK		(0x1ff << 9)
+#define IMX7_TEMPSENSE0_LOW_ALARM_SHIFT		0
+#define IMX7_TEMPSENSE0_LOW_ALARM_MASK		0x1ff
+
+#define IMX7_TEMPSENSE1				0x310
+#define IMX7_TEMPSENSE1_MEASURE_FREQ_SHIFT	16
+#define IMX7_TEMPSENSE1_MEASURE_FREQ_MASK	(0xffff << 16)
+#define IMX7_TEMPSENSE1_FINISHED		(1 << 11)
+#define IMX7_TEMPSENSE1_MEASURE_TEMP		(1 << 10)
+#define IMX7_TEMPSENSE1_POWER_DOWN		(1 << 9)
+#define IMX7_TEMPSENSE1_TEMP_VALUE_SHIFT	0
+#define IMX7_TEMPSENSE1_TEMP_VALUE_MASK		0x1ff
+
+#define IMX6_OCOTP_MEM0				0x0480
+#define IMX6_OCOTP_ANA1				0x04e0
+#define IMX7_OCOTP_TESTER3			0x0440
+#define IMX7_OCOTP_ANA1				0x04f0
 
 /* The driver supports 1 passive trip point and 1 critical trip point */
 enum imx_thermal_trip {
@@ -76,17 +100,110 @@ enum imx_thermal_trip {
 
 #define TEMPMON_IMX6Q			1
 #define TEMPMON_IMX6SX			2
+#define TEMPMON_IMX7			3
 
 struct thermal_soc_data {
 	u32 version;
+
+	u32 sensor_ctrl;
+	u32 power_down_mask;
+	u32 measure_temp_mask;
+
+	u32 measure_freq_ctrl;
+	u32 measure_freq_mask;
+	u32 measure_freq_shift;
+
+	u32 temp_data;
+	u32 temp_value_mask;
+	u32 temp_value_shift;
+	u32 temp_valid_mask;
+
+	u32 panic_alarm_ctrl;
+	u32 panic_alarm_mask;
+	u32 panic_alarm_shift;
+
+	u32 high_alarm_ctrl;
+	u32 high_alarm_mask;
+	u32 high_alarm_shift;
+
+	u32 low_alarm_ctrl;
+	u32 low_alarm_mask;
+	u32 low_alarm_shift;
 };
 
 static struct thermal_soc_data thermal_imx6q_data = {
 	.version = TEMPMON_IMX6Q,
+
+	.sensor_ctrl = IMX6_TEMPSENSE0,
+	.power_down_mask = IMX6_TEMPSENSE0_POWER_DOWN,
+	.measure_temp_mask = IMX6_TEMPSENSE0_MEASURE_TEMP,
+
+	.measure_freq_ctrl = IMX6_TEMPSENSE1,
+	.measure_freq_shift = IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT,
+	.measure_freq_mask = IMX6_TEMPSENSE1_MEASURE_FREQ,
+
+	.temp_data = IMX6_TEMPSENSE0,
+	.temp_value_mask = IMX6_TEMPSENSE0_TEMP_CNT_MASK,
+	.temp_value_shift = IMX6_TEMPSENSE0_TEMP_CNT_SHIFT,
+	.temp_valid_mask = IMX6_TEMPSENSE0_FINISHED,
+
+	.high_alarm_ctrl = IMX6_TEMPSENSE0,
+	.high_alarm_mask = IMX6_TEMPSENSE0_ALARM_VALUE_MASK,
+	.high_alarm_shift = IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT,
 };
 
 static struct thermal_soc_data thermal_imx6sx_data = {
 	.version = TEMPMON_IMX6SX,
+
+	.sensor_ctrl = IMX6_TEMPSENSE0,
+	.power_down_mask = IMX6_TEMPSENSE0_POWER_DOWN,
+	.measure_temp_mask = IMX6_TEMPSENSE0_MEASURE_TEMP,
+
+	.measure_freq_ctrl = IMX6_TEMPSENSE1,
+	.measure_freq_shift = IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT,
+	.measure_freq_mask = IMX6_TEMPSENSE1_MEASURE_FREQ,
+
+	.temp_data = IMX6_TEMPSENSE0,
+	.temp_value_mask = IMX6_TEMPSENSE0_TEMP_CNT_MASK,
+	.temp_value_shift = IMX6_TEMPSENSE0_TEMP_CNT_SHIFT,
+	.temp_valid_mask = IMX6_TEMPSENSE0_FINISHED,
+
+	.high_alarm_ctrl = IMX6_TEMPSENSE0,
+	.high_alarm_mask = IMX6_TEMPSENSE0_ALARM_VALUE_MASK,
+	.high_alarm_shift = IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT,
+
+	.panic_alarm_ctrl = IMX6_TEMPSENSE2,
+	.panic_alarm_mask = IMX6_TEMPSENSE2_PANIC_VALUE_MASK,
+	.panic_alarm_shift = IMX6_TEMPSENSE2_PANIC_VALUE_SHIFT,
+};
+
+static struct thermal_soc_data thermal_imx7_data = {
+	.version = TEMPMON_IMX7,
+
+	.sensor_ctrl = IMX7_TEMPSENSE1,
+	.power_down_mask = IMX7_TEMPSENSE1_POWER_DOWN,
+	.measure_temp_mask = IMX7_TEMPSENSE1_MEASURE_TEMP,
+
+	.measure_freq_ctrl = IMX7_TEMPSENSE1,
+	.measure_freq_shift = IMX7_TEMPSENSE1_MEASURE_FREQ_SHIFT,
+	.measure_freq_mask = IMX7_TEMPSENSE1_MEASURE_FREQ_MASK,
+
+	.temp_data = IMX7_TEMPSENSE1,
+	.temp_value_mask = IMX7_TEMPSENSE1_TEMP_VALUE_MASK,
+	.temp_value_shift = IMX7_TEMPSENSE1_TEMP_VALUE_SHIFT,
+	.temp_valid_mask = IMX7_TEMPSENSE1_FINISHED,
+
+	.panic_alarm_ctrl = IMX7_TEMPSENSE1,
+	.panic_alarm_mask = IMX7_TEMPSENSE0_PANIC_ALARM_MASK,
+	.panic_alarm_shift = IMX7_TEMPSENSE0_PANIC_ALARM_SHIFT,
+
+	.high_alarm_ctrl = IMX7_TEMPSENSE0,
+	.high_alarm_mask = IMX7_TEMPSENSE0_HIGH_ALARM_MASK,
+	.high_alarm_shift = IMX7_TEMPSENSE0_HIGH_ALARM_SHIFT,
+
+	.low_alarm_ctrl = IMX7_TEMPSENSE0,
+	.low_alarm_mask = IMX7_TEMPSENSE0_LOW_ALARM_MASK,
+	.low_alarm_shift = IMX7_TEMPSENSE0_LOW_ALARM_SHIFT,
 };
 
 struct imx_thermal_data {
@@ -112,30 +229,44 @@ static void imx_set_panic_temp(struct imx_thermal_data *data,
 			       int panic_temp)
 {
 	struct regmap *map = data->tempmon;
+	const struct thermal_soc_data *soc_data = data->socdata;
 	int critical_value;
 
-	critical_value = (data->c2 - panic_temp) / data->c1;
-	regmap_write(map, TEMPSENSE2 + REG_CLR, TEMPSENSE2_PANIC_VALUE_MASK);
-	regmap_write(map, TEMPSENSE2 + REG_SET, critical_value <<
-			TEMPSENSE2_PANIC_VALUE_SHIFT);
+	if (data->socdata->version == TEMPMON_IMX7)
+		critical_value = panic_temp / 1000 + data->c1 - 25;
+	else
+		critical_value = (data->c2 - panic_temp) / data->c1;
+
+	regmap_write(map, soc_data->panic_alarm_ctrl + REG_CLR,
+		     soc_data->panic_alarm_mask);
+	regmap_write(map, soc_data->panic_alarm_ctrl + REG_SET,
+		     critical_value << soc_data->panic_alarm_shift);
 }
 
 static void imx_set_alarm_temp(struct imx_thermal_data *data,
 			       int alarm_temp)
 {
 	struct regmap *map = data->tempmon;
+	const struct thermal_soc_data *soc_data = data->socdata;
 	int alarm_value;
 
 	data->alarm_temp = alarm_temp;
-	alarm_value = (data->c2 - alarm_temp) / data->c1;
-	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_ALARM_VALUE_MASK);
-	regmap_write(map, TEMPSENSE0 + REG_SET, alarm_value <<
-			TEMPSENSE0_ALARM_VALUE_SHIFT);
+
+	if (data->socdata->version == TEMPMON_IMX7)
+		alarm_value = alarm_temp / 1000 + data->c1 - 25;
+	else
+		alarm_value = (data->c2 - alarm_temp) / data->c1;
+
+	regmap_write(map, soc_data->high_alarm_ctrl + REG_CLR,
+		     soc_data->high_alarm_mask);
+	regmap_write(map, soc_data->high_alarm_ctrl + REG_SET,
+		     alarm_value << soc_data->high_alarm_shift);
 }
 
 static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
 {
 	struct imx_thermal_data *data = tz->devdata;
+	const struct thermal_soc_data *soc_data = data->socdata;
 	struct regmap *map = data->tempmon;
 	unsigned int n_meas;
 	bool wait;
@@ -143,16 +274,18 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
 
 	if (data->mode == THERMAL_DEVICE_ENABLED) {
 		/* Check if a measurement is currently in progress */
-		regmap_read(map, TEMPSENSE0, &val);
-		wait = !(val & TEMPSENSE0_FINISHED);
+		regmap_read(map, soc_data->temp_data, &val);
+		wait = !(val & soc_data->temp_valid_mask);
 	} else {
 		/*
 		 * Every time we measure the temperature, we will power on the
 		 * temperature sensor, enable measurements, take a reading,
 		 * disable measurements, power off the temperature sensor.
 		 */
-		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
-		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
+		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
+			    soc_data->power_down_mask);
+		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
+			    soc_data->measure_temp_mask);
 
 		wait = true;
 	}
@@ -164,22 +297,28 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
 	if (wait)
 		usleep_range(20, 50);
 
-	regmap_read(map, TEMPSENSE0, &val);
+	regmap_read(map, soc_data->temp_data, &val);
 
 	if (data->mode != THERMAL_DEVICE_ENABLED) {
-		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
-		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
+		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
+			     soc_data->measure_temp_mask);
+		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
+			     soc_data->power_down_mask);
 	}
 
-	if ((val & TEMPSENSE0_FINISHED) == 0) {
+	if ((val & soc_data->temp_valid_mask) == 0) {
 		dev_dbg(&tz->device, "temp measurement never finished\n");
 		return -EAGAIN;
 	}
 
-	n_meas = (val & TEMPSENSE0_TEMP_CNT_MASK) >> TEMPSENSE0_TEMP_CNT_SHIFT;
+	n_meas = (val & soc_data->temp_value_mask)
+		>> soc_data->temp_value_shift;
 
 	/* See imx_init_calib() for formula derivation */
-	*temp = data->c2 - n_meas * data->c1;
+	if (data->socdata->version == TEMPMON_IMX7)
+		*temp = (n_meas - data->c1 + 25) * 1000;
+	else
+		*temp = data->c2 - n_meas * data->c1;
 
 	/* Update alarm value to next higher trip point for TEMPMON_IMX6Q */
 	if (data->socdata->version == TEMPMON_IMX6Q) {
@@ -223,21 +362,26 @@ static int imx_set_mode(struct thermal_zone_device *tz,
 {
 	struct imx_thermal_data *data = tz->devdata;
 	struct regmap *map = data->tempmon;
+	const struct thermal_soc_data *soc_data = data->socdata;
 
 	if (mode == THERMAL_DEVICE_ENABLED) {
 		tz->polling_delay = IMX_POLLING_DELAY;
 		tz->passive_delay = IMX_PASSIVE_DELAY;
 
-		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
-		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
+		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
+			     soc_data->power_down_mask);
+		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
+			     soc_data->measure_temp_mask);
 
 		if (!data->irq_enabled) {
 			data->irq_enabled = true;
 			enable_irq(data->irq);
 		}
 	} else {
-		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
-		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
+		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
+			     soc_data->measure_temp_mask);
+		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
+			     soc_data->power_down_mask);
 
 		tz->polling_delay = 0;
 		tz->passive_delay = 0;
@@ -359,6 +503,15 @@ static int imx_init_calib(struct platform_device *pdev, u32 val)
 	}
 
 	/*
+	 * On i.MX7, we only use the calibration data at 25C to get the temp,
+	 * Tmeas = ( Nmeas - n1) + 25; n1 is the fuse value for 25C.
+	 */
+	if (data->socdata->version == TEMPMON_IMX7) {
+		data->c1 = (val >> 9) & 0x1ff;
+		return 0;
+	}
+
+	/*
 	 * Sensor data layout:
 	 *   [31:20] - sensor value @ 25C
 	 * Use universal formula now and only need sensor value @ 25C
@@ -426,6 +579,7 @@ static void imx_init_temp_grade(struct platform_device *pdev, u32 val)
 
 static int imx_init_from_tempmon_data(struct platform_device *pdev)
 {
+	struct imx_thermal_data *data = platform_get_drvdata(pdev);
 	struct regmap *map;
 	int ret;
 	u32 val;
@@ -438,7 +592,11 @@ static int imx_init_from_tempmon_data(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = regmap_read(map, OCOTP_ANA1, &val);
+	if (data->socdata->version == TEMPMON_IMX7)
+		ret = regmap_read(map, IMX7_OCOTP_ANA1, &val);
+	else
+		ret = regmap_read(map, IMX6_OCOTP_ANA1, &val);
+
 	if (ret) {
 		dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
 		return ret;
@@ -447,7 +605,11 @@ static int imx_init_from_tempmon_data(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = regmap_read(map, OCOTP_MEM0, &val);
+	/* use OTP for thermal grade */
+	if (data->socdata->version == TEMPMON_IMX7)
+		ret = regmap_read(map, IMX7_OCOTP_TESTER3, &val);
+	else
+		ret = regmap_read(map, IMX6_OCOTP_MEM0, &val);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
 		return ret;
@@ -500,6 +662,7 @@ static irqreturn_t imx_thermal_alarm_irq_thread(int irq, void *dev)
 static const struct of_device_id of_imx_thermal_match[] = {
 	{ .compatible = "fsl,imx6q-tempmon", .data = &thermal_imx6q_data, },
 	{ .compatible = "fsl,imx6sx-tempmon", .data = &thermal_imx6sx_data, },
+	{ .compatible = "fsl,imx7-tempmon", .data = &thermal_imx7_data, },
 	{ /* end */ }
 };
 MODULE_DEVICE_TABLE(of, of_imx_thermal_match);
@@ -531,14 +694,15 @@ static int imx_thermal_probe(struct platform_device *pdev)
 
 	/* make sure the IRQ flag is clear before enabling irq on i.MX6SX */
 	if (data->socdata->version == TEMPMON_IMX6SX) {
-		regmap_write(map, MISC1 + REG_CLR, MISC1_IRQ_TEMPHIGH |
-			MISC1_IRQ_TEMPLOW | MISC1_IRQ_TEMPPANIC);
+		regmap_write(map, IMX6_MISC1 + REG_CLR,
+			IMX6_MISC1_IRQ_TEMPHIGH | IMX6_MISC1_IRQ_TEMPLOW
+			| IMX6_MISC1_IRQ_TEMPPANIC);
 		/*
 		 * reset value of LOW ALARM is incorrect, set it to lowest
 		 * value to avoid false trigger of low alarm.
 		 */
-		regmap_write(map, TEMPSENSE2 + REG_SET,
-			TEMPSENSE2_LOW_VALUE_MASK);
+		regmap_write(map, IMX6_TEMPSENSE2 + REG_SET,
+			IMX6_TEMPSENSE2_LOW_VALUE_MASK);
 	}
 
 	data->irq = platform_get_irq(pdev, 0);
@@ -565,11 +729,17 @@ static int imx_thermal_probe(struct platform_device *pdev)
 	}
 
 	/* Make sure sensor is in known good state for measurements */
-	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
-	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
-	regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ);
-	regmap_write(map, MISC0 + REG_SET, MISC0_REFTOP_SELBIASOFF);
-	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
+	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
+		     data->socdata->power_down_mask);
+	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
+		     data->socdata->measure_temp_mask);
+	regmap_write(map, data->socdata->measure_freq_ctrl + REG_CLR,
+		     data->socdata->measure_freq_mask);
+	if (data->socdata->version != TEMPMON_IMX7)
+		regmap_write(map, IMX6_MISC0 + REG_SET,
+			IMX6_MISC0_REFTOP_SELBIASOFF);
+	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
+		     data->socdata->power_down_mask);
 
 	data->policy = cpufreq_cpu_get(0);
 	if (!data->policy) {
@@ -634,16 +804,20 @@ static int imx_thermal_probe(struct platform_device *pdev)
 		 data->temp_passive / 1000);
 
 	/* Enable measurements at ~ 10 Hz */
-	regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ);
+	regmap_write(map, data->socdata->measure_freq_ctrl + REG_CLR,
+		     data->socdata->measure_freq_mask);
 	measure_freq = DIV_ROUND_UP(32768, 10); /* 10 Hz */
-	regmap_write(map, TEMPSENSE1 + REG_SET, measure_freq);
+	regmap_write(map, data->socdata->measure_freq_ctrl + REG_SET,
+		     measure_freq << data->socdata->measure_freq_shift);
 	imx_set_alarm_temp(data, data->temp_passive);
 
 	if (data->socdata->version == TEMPMON_IMX6SX)
 		imx_set_panic_temp(data, data->temp_critical);
 
-	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
-	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
+	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
+		     data->socdata->power_down_mask);
+	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
+		     data->socdata->measure_temp_mask);
 
 	ret = devm_request_threaded_irq(&pdev->dev, data->irq,
 			imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread,
@@ -669,7 +843,8 @@ static int imx_thermal_remove(struct platform_device *pdev)
 	struct regmap *map = data->tempmon;
 
 	/* Disable measurements */
-	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
+	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
+		     data->socdata->power_down_mask);
 	if (!IS_ERR(data->thermal_clk))
 		clk_disable_unprepare(data->thermal_clk);
 
@@ -692,8 +867,10 @@ static int imx_thermal_suspend(struct device *dev)
 	 * temperature will be read as the thermal sensor is powered
 	 * down.
 	 */
-	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
-	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
+	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
+		     data->socdata->measure_temp_mask);
+	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
+		     data->socdata->power_down_mask);
 	data->mode = THERMAL_DEVICE_DISABLED;
 	clk_disable_unprepare(data->thermal_clk);
 
@@ -710,8 +887,10 @@ static int imx_thermal_resume(struct device *dev)
 	if (ret)
 		return ret;
 	/* Enabled thermal sensor after resume */
-	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
-	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
+	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
+		     data->socdata->power_down_mask);
+	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
+		     data->socdata->measure_temp_mask);
 	data->mode = THERMAL_DEVICE_ENABLED;
 
 	return 0;
-- 
2.7.4

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Re: [PATCH 1/2] ARM: dts: imx7s: add temperature monitor support

[Dong Aisheng]

On Mon, Jan 22, 2018 at 03:25:48PM +0800, Anson Huang wrote:
> Add i.MX7 temperature monitor support.
> 
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> ---
>  .../devicetree/bindings/thermal/imx-thermal.txt      |  5 +++--
>  arch/arm/boot/dts/imx7s.dtsi                         | 20 ++++++++++++++++++++
>  2 files changed, 23 insertions(+), 2 deletions(-)
> 

Acked-by: Dong Aisheng <aisheng.dong@nxp.com>

Regards
Dong Aisheng

> diff --git a/Documentation/devicetree/bindings/thermal/imx-thermal.txt b/Documentation/devicetree/bindings/thermal/imx-thermal.txt
> index 28be51a..9575d45 100644
> --- a/Documentation/devicetree/bindings/thermal/imx-thermal.txt
> +++ b/Documentation/devicetree/bindings/thermal/imx-thermal.txt
> @@ -1,8 +1,9 @@
>  * Temperature Monitor (TEMPMON) on Freescale i.MX SoCs
>  
>  Required properties:
> -- compatible : "fsl,imx6q-tempmon" for i.MX6Q, "fsl,imx6sx-tempmon" for i.MX6SX.
> -  i.MX6SX has two more IRQs than i.MX6Q, one is IRQ_LOW and the other is IRQ_PANIC,
> +- compatible : "fsl,imx6q-tempmon" for i.MX6Q, "fsl,imx6sx-tempmon" for i.MX6SX,
> +  "fsl,imx7-tempmon" for i.MX7S/D.
> +  i.MX6SX and i.MX7S/D have two more IRQs than i.MX6Q, one is IRQ_LOW and the other is IRQ_PANIC,
>    when temperature is below than low threshold, IRQ_LOW will be triggered, when temperature
>    is higher than panic threshold, system will auto reboot by SRC module.
>  - fsl,tempmon : phandle pointer to system controller that contains TEMPMON
> diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi
> index 82ad26e..2e2eda53 100644
> --- a/arch/arm/boot/dts/imx7s.dtsi
> +++ b/arch/arm/boot/dts/imx7s.dtsi
> @@ -497,9 +497,29 @@
>  			};
>  
>  			ocotp: ocotp-ctrl@30350000 {
> +				#address-cells = <1>;
> +				#size-cells = <1>;
>  				compatible = "fsl,imx7d-ocotp", "syscon";
>  				reg = <0x30350000 0x10000>;
>  				clocks = <&clks IMX7D_OCOTP_CLK>;
> +
> +				tempmon_calib: calib@3c {
> +					reg = <0x3c 0x4>;
> +				};
> +
> +				tempmon_temp_grade: temp-grade@10 {
> +					reg = <0x10 0x4>;
> +				};
> +			};
> +
> +			tempmon: tempmon {
> +				compatible = "fsl,imx7-tempmon";
> +				interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
> +				fsl,tempmon =<&anatop>;
> +				nvmem-cells = <&tempmon_calib>,
> +					<&tempmon_temp_grade>;
> +				nvmem-cell-names = "calib", "temp_grade";
> +				clocks = <&clks IMX7D_PLL_SYS_MAIN_CLK>;
>  			};
>  
>  			anatop: anatop@30360000 {
> -- 
> 2.7.4
> 

Re: [PATCH 2/2] thermal: imx: add i.MX7 thermal sensor support

[Dong Aisheng]

On Mon, Jan 22, 2018 at 03:25:49PM +0800, Anson Huang wrote:
> This patch adds i.MX7 thermal sensor support, most
> of the i.MX7 thermal sensor functions are same with
> i.MX6 except the registers offset/layout, so we move
> those registers offset/layout definitions to soc data
> structure.
> 
> i.MX7 uses single calibration data @25C, the calibration
> data is located at OCOTP offset 0x4F0, bit[17:9], the
> formula is as below:
> 
> Tmeas = (Nmeas - n1) + 25; n1 is the fuse value for 25C.
> 
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> Signed-off-by: Bai Ping <ping.bai@nxp.com>

Generally this patch looks fine to me.

Just a few small questions.

> ---
>  drivers/thermal/imx_thermal.c | 315 +++++++++++++++++++++++++++++++++---------
>  1 file changed, 247 insertions(+), 68 deletions(-)
> 
> diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
> index e7d4ffc..b2a00d6 100644
> --- a/drivers/thermal/imx_thermal.c
> +++ b/drivers/thermal/imx_thermal.c
> @@ -31,34 +31,58 @@
>  #define REG_CLR		0x8
>  #define REG_TOG		0xc
>  
> -#define MISC0				0x0150
> -#define MISC0_REFTOP_SELBIASOFF		(1 << 3)
> -#define MISC1				0x0160
> -#define MISC1_IRQ_TEMPHIGH		(1 << 29)
> +/* i.MX6 specific */
> +#define IMX6_MISC0				0x0150
> +#define IMX6_MISC0_REFTOP_SELBIASOFF		(1 << 3)
> +#define IMX6_MISC1				0x0160
> +#define IMX6_MISC1_IRQ_TEMPHIGH			(1 << 29)
>  /* Below LOW and PANIC bits are only for TEMPMON_IMX6SX */
> -#define MISC1_IRQ_TEMPLOW		(1 << 28)
> -#define MISC1_IRQ_TEMPPANIC		(1 << 27)
> -
> -#define TEMPSENSE0			0x0180
> -#define TEMPSENSE0_ALARM_VALUE_SHIFT	20
> -#define TEMPSENSE0_ALARM_VALUE_MASK	(0xfff << TEMPSENSE0_ALARM_VALUE_SHIFT)
> -#define TEMPSENSE0_TEMP_CNT_SHIFT	8
> -#define TEMPSENSE0_TEMP_CNT_MASK	(0xfff << TEMPSENSE0_TEMP_CNT_SHIFT)
> -#define TEMPSENSE0_FINISHED		(1 << 2)
> -#define TEMPSENSE0_MEASURE_TEMP		(1 << 1)
> -#define TEMPSENSE0_POWER_DOWN		(1 << 0)
> -
> -#define TEMPSENSE1			0x0190
> -#define TEMPSENSE1_MEASURE_FREQ		0xffff
> -/* Below TEMPSENSE2 is only for TEMPMON_IMX6SX */
> -#define TEMPSENSE2			0x0290
> -#define TEMPSENSE2_LOW_VALUE_SHIFT	0
> -#define TEMPSENSE2_LOW_VALUE_MASK	0xfff
> -#define TEMPSENSE2_PANIC_VALUE_SHIFT	16
> -#define TEMPSENSE2_PANIC_VALUE_MASK	0xfff0000
> +#define IMX6_MISC1_IRQ_TEMPLOW			(1 << 28)
> +#define IMX6_MISC1_IRQ_TEMPPANIC		(1 << 27)
> +
> +#define IMX6_TEMPSENSE0				0x0180
> +#define IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT	20
> +#define IMX6_TEMPSENSE0_ALARM_VALUE_MASK	(0xfff << 20)
> +#define IMX6_TEMPSENSE0_TEMP_CNT_SHIFT		8
> +#define IMX6_TEMPSENSE0_TEMP_CNT_MASK		(0xfff << 8)
> +#define IMX6_TEMPSENSE0_FINISHED		(1 << 2)
> +#define IMX6_TEMPSENSE0_MEASURE_TEMP		(1 << 1)
> +#define IMX6_TEMPSENSE0_POWER_DOWN		(1 << 0)
> +
> +#define IMX6_TEMPSENSE1				0x0190
> +#define IMX6_TEMPSENSE1_MEASURE_FREQ		0xffff
> +#define IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT	0
>  
> -#define OCOTP_MEM0			0x0480
> -#define OCOTP_ANA1			0x04e0
> +/* Below TEMPSENSE2 is only for TEMPMON_IMX6SX */
> +#define IMX6_TEMPSENSE2				0x0290
> +#define IMX6_TEMPSENSE2_LOW_VALUE_SHIFT		0
> +#define IMX6_TEMPSENSE2_LOW_VALUE_MASK		0xfff
> +#define IMX6_TEMPSENSE2_PANIC_VALUE_SHIFT	16
> +#define IMX6_TEMPSENSE2_PANIC_VALUE_MASK	0xfff0000
> +
> +/* i.MX7 specific */
> +#define IMX7_ANADIG_DIGPROG			0x800
> +#define IMX7_TEMPSENSE0				0x300
> +#define IMX7_TEMPSENSE0_PANIC_ALARM_SHIFT	18
> +#define IMX7_TEMPSENSE0_PANIC_ALARM_MASK	(0x1ff << 18)
> +#define IMX7_TEMPSENSE0_HIGH_ALARM_SHIFT	9
> +#define IMX7_TEMPSENSE0_HIGH_ALARM_MASK		(0x1ff << 9)
> +#define IMX7_TEMPSENSE0_LOW_ALARM_SHIFT		0
> +#define IMX7_TEMPSENSE0_LOW_ALARM_MASK		0x1ff
> +
> +#define IMX7_TEMPSENSE1				0x310
> +#define IMX7_TEMPSENSE1_MEASURE_FREQ_SHIFT	16
> +#define IMX7_TEMPSENSE1_MEASURE_FREQ_MASK	(0xffff << 16)
> +#define IMX7_TEMPSENSE1_FINISHED		(1 << 11)
> +#define IMX7_TEMPSENSE1_MEASURE_TEMP		(1 << 10)
> +#define IMX7_TEMPSENSE1_POWER_DOWN		(1 << 9)
> +#define IMX7_TEMPSENSE1_TEMP_VALUE_SHIFT	0
> +#define IMX7_TEMPSENSE1_TEMP_VALUE_MASK		0x1ff
> +
> +#define IMX6_OCOTP_MEM0				0x0480
> +#define IMX6_OCOTP_ANA1				0x04e0
> +#define IMX7_OCOTP_TESTER3			0x0440
> +#define IMX7_OCOTP_ANA1				0x04f0
>  
>  /* The driver supports 1 passive trip point and 1 critical trip point */
>  enum imx_thermal_trip {
> @@ -76,17 +100,110 @@ enum imx_thermal_trip {
>  
>  #define TEMPMON_IMX6Q			1
>  #define TEMPMON_IMX6SX			2
> +#define TEMPMON_IMX7			3
>  
>  struct thermal_soc_data {
>  	u32 version;
> +
> +	u32 sensor_ctrl;
> +	u32 power_down_mask;
> +	u32 measure_temp_mask;
> +
> +	u32 measure_freq_ctrl;
> +	u32 measure_freq_mask;
> +	u32 measure_freq_shift;
> +
> +	u32 temp_data;
> +	u32 temp_value_mask;
> +	u32 temp_value_shift;
> +	u32 temp_valid_mask;
> +
> +	u32 panic_alarm_ctrl;
> +	u32 panic_alarm_mask;
> +	u32 panic_alarm_shift;
> +
> +	u32 high_alarm_ctrl;
> +	u32 high_alarm_mask;
> +	u32 high_alarm_shift;
> +
> +	u32 low_alarm_ctrl;
> +	u32 low_alarm_mask;
> +	u32 low_alarm_shift;
>  };
>  
>  static struct thermal_soc_data thermal_imx6q_data = {
>  	.version = TEMPMON_IMX6Q,
> +
> +	.sensor_ctrl = IMX6_TEMPSENSE0,
> +	.power_down_mask = IMX6_TEMPSENSE0_POWER_DOWN,
> +	.measure_temp_mask = IMX6_TEMPSENSE0_MEASURE_TEMP,
> +
> +	.measure_freq_ctrl = IMX6_TEMPSENSE1,
> +	.measure_freq_shift = IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT,
> +	.measure_freq_mask = IMX6_TEMPSENSE1_MEASURE_FREQ,
> +
> +	.temp_data = IMX6_TEMPSENSE0,
> +	.temp_value_mask = IMX6_TEMPSENSE0_TEMP_CNT_MASK,
> +	.temp_value_shift = IMX6_TEMPSENSE0_TEMP_CNT_SHIFT,
> +	.temp_valid_mask = IMX6_TEMPSENSE0_FINISHED,
> +
> +	.high_alarm_ctrl = IMX6_TEMPSENSE0,
> +	.high_alarm_mask = IMX6_TEMPSENSE0_ALARM_VALUE_MASK,
> +	.high_alarm_shift = IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT,
>  };
>  
>  static struct thermal_soc_data thermal_imx6sx_data = {
>  	.version = TEMPMON_IMX6SX,
> +
> +	.sensor_ctrl = IMX6_TEMPSENSE0,
> +	.power_down_mask = IMX6_TEMPSENSE0_POWER_DOWN,
> +	.measure_temp_mask = IMX6_TEMPSENSE0_MEASURE_TEMP,
> +
> +	.measure_freq_ctrl = IMX6_TEMPSENSE1,
> +	.measure_freq_shift = IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT,
> +	.measure_freq_mask = IMX6_TEMPSENSE1_MEASURE_FREQ,
> +
> +	.temp_data = IMX6_TEMPSENSE0,
> +	.temp_value_mask = IMX6_TEMPSENSE0_TEMP_CNT_MASK,
> +	.temp_value_shift = IMX6_TEMPSENSE0_TEMP_CNT_SHIFT,
> +	.temp_valid_mask = IMX6_TEMPSENSE0_FINISHED,
> +
> +	.high_alarm_ctrl = IMX6_TEMPSENSE0,
> +	.high_alarm_mask = IMX6_TEMPSENSE0_ALARM_VALUE_MASK,
> +	.high_alarm_shift = IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT,
> +
> +	.panic_alarm_ctrl = IMX6_TEMPSENSE2,
> +	.panic_alarm_mask = IMX6_TEMPSENSE2_PANIC_VALUE_MASK,
> +	.panic_alarm_shift = IMX6_TEMPSENSE2_PANIC_VALUE_SHIFT,

Missing low_alarm setting here, seems you operate them directly
with macros in another place.

> +};
> +
> +static struct thermal_soc_data thermal_imx7_data = {
> +	.version = TEMPMON_IMX7,
> +
> +	.sensor_ctrl = IMX7_TEMPSENSE1,
> +	.power_down_mask = IMX7_TEMPSENSE1_POWER_DOWN,
> +	.measure_temp_mask = IMX7_TEMPSENSE1_MEASURE_TEMP,
> +
> +	.measure_freq_ctrl = IMX7_TEMPSENSE1,
> +	.measure_freq_shift = IMX7_TEMPSENSE1_MEASURE_FREQ_SHIFT,
> +	.measure_freq_mask = IMX7_TEMPSENSE1_MEASURE_FREQ_MASK,
> +
> +	.temp_data = IMX7_TEMPSENSE1,
> +	.temp_value_mask = IMX7_TEMPSENSE1_TEMP_VALUE_MASK,
> +	.temp_value_shift = IMX7_TEMPSENSE1_TEMP_VALUE_SHIFT,
> +	.temp_valid_mask = IMX7_TEMPSENSE1_FINISHED,
> +
> +	.panic_alarm_ctrl = IMX7_TEMPSENSE1,
> +	.panic_alarm_mask = IMX7_TEMPSENSE0_PANIC_ALARM_MASK,
> +	.panic_alarm_shift = IMX7_TEMPSENSE0_PANIC_ALARM_SHIFT,
> +
> +	.high_alarm_ctrl = IMX7_TEMPSENSE0,
> +	.high_alarm_mask = IMX7_TEMPSENSE0_HIGH_ALARM_MASK,
> +	.high_alarm_shift = IMX7_TEMPSENSE0_HIGH_ALARM_SHIFT,
> +
> +	.low_alarm_ctrl = IMX7_TEMPSENSE0,
> +	.low_alarm_mask = IMX7_TEMPSENSE0_LOW_ALARM_MASK,
> +	.low_alarm_shift = IMX7_TEMPSENSE0_LOW_ALARM_SHIFT,
>  };
>  
>  struct imx_thermal_data {
> @@ -112,30 +229,44 @@ static void imx_set_panic_temp(struct imx_thermal_data *data,
>  			       int panic_temp)
>  {
>  	struct regmap *map = data->tempmon;
> +	const struct thermal_soc_data *soc_data = data->socdata;
>  	int critical_value;
>  
> -	critical_value = (data->c2 - panic_temp) / data->c1;
> -	regmap_write(map, TEMPSENSE2 + REG_CLR, TEMPSENSE2_PANIC_VALUE_MASK);
> -	regmap_write(map, TEMPSENSE2 + REG_SET, critical_value <<
> -			TEMPSENSE2_PANIC_VALUE_SHIFT);
> +	if (data->socdata->version == TEMPMON_IMX7)

Is there an chance for MX7 to reach here?

> +		critical_value = panic_temp / 1000 + data->c1 - 25;
> +	else
> +		critical_value = (data->c2 - panic_temp) / data->c1;
> +
> +	regmap_write(map, soc_data->panic_alarm_ctrl + REG_CLR,
> +		     soc_data->panic_alarm_mask);
> +	regmap_write(map, soc_data->panic_alarm_ctrl + REG_SET,
> +		     critical_value << soc_data->panic_alarm_shift);
>  }
>  
>  static void imx_set_alarm_temp(struct imx_thermal_data *data,
>  			       int alarm_temp)
>  {
>  	struct regmap *map = data->tempmon;
> +	const struct thermal_soc_data *soc_data = data->socdata;
>  	int alarm_value;
>  
>  	data->alarm_temp = alarm_temp;
> -	alarm_value = (data->c2 - alarm_temp) / data->c1;
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_ALARM_VALUE_MASK);
> -	regmap_write(map, TEMPSENSE0 + REG_SET, alarm_value <<
> -			TEMPSENSE0_ALARM_VALUE_SHIFT);
> +
> +	if (data->socdata->version == TEMPMON_IMX7)
> +		alarm_value = alarm_temp / 1000 + data->c1 - 25;
> +	else
> +		alarm_value = (data->c2 - alarm_temp) / data->c1;
> +
> +	regmap_write(map, soc_data->high_alarm_ctrl + REG_CLR,
> +		     soc_data->high_alarm_mask);
> +	regmap_write(map, soc_data->high_alarm_ctrl + REG_SET,
> +		     alarm_value << soc_data->high_alarm_shift);
>  }
>  
>  static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
>  {
>  	struct imx_thermal_data *data = tz->devdata;
> +	const struct thermal_soc_data *soc_data = data->socdata;
>  	struct regmap *map = data->tempmon;
>  	unsigned int n_meas;
>  	bool wait;
> @@ -143,16 +274,18 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
>  
>  	if (data->mode == THERMAL_DEVICE_ENABLED) {
>  		/* Check if a measurement is currently in progress */
> -		regmap_read(map, TEMPSENSE0, &val);
> -		wait = !(val & TEMPSENSE0_FINISHED);
> +		regmap_read(map, soc_data->temp_data, &val);
> +		wait = !(val & soc_data->temp_valid_mask);
>  	} else {
>  		/*
>  		 * Every time we measure the temperature, we will power on the
>  		 * temperature sensor, enable measurements, take a reading,
>  		 * disable measurements, power off the temperature sensor.
>  		 */
> -		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
> -		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
> +			    soc_data->power_down_mask);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
> +			    soc_data->measure_temp_mask);
>  
>  		wait = true;
>  	}
> @@ -164,22 +297,28 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
>  	if (wait)
>  		usleep_range(20, 50);
>  
> -	regmap_read(map, TEMPSENSE0, &val);
> +	regmap_read(map, soc_data->temp_data, &val);
>  
>  	if (data->mode != THERMAL_DEVICE_ENABLED) {
> -		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
> -		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
> +			     soc_data->measure_temp_mask);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
> +			     soc_data->power_down_mask);
>  	}
>  
> -	if ((val & TEMPSENSE0_FINISHED) == 0) {
> +	if ((val & soc_data->temp_valid_mask) == 0) {
>  		dev_dbg(&tz->device, "temp measurement never finished\n");
>  		return -EAGAIN;
>  	}
>  
> -	n_meas = (val & TEMPSENSE0_TEMP_CNT_MASK) >> TEMPSENSE0_TEMP_CNT_SHIFT;
> +	n_meas = (val & soc_data->temp_value_mask)
> +		>> soc_data->temp_value_shift;
>  
>  	/* See imx_init_calib() for formula derivation */
> -	*temp = data->c2 - n_meas * data->c1;
> +	if (data->socdata->version == TEMPMON_IMX7)
> +		*temp = (n_meas - data->c1 + 25) * 1000;
> +	else
> +		*temp = data->c2 - n_meas * data->c1;
>  
>  	/* Update alarm value to next higher trip point for TEMPMON_IMX6Q */
>  	if (data->socdata->version == TEMPMON_IMX6Q) {
> @@ -223,21 +362,26 @@ static int imx_set_mode(struct thermal_zone_device *tz,
>  {
>  	struct imx_thermal_data *data = tz->devdata;
>  	struct regmap *map = data->tempmon;
> +	const struct thermal_soc_data *soc_data = data->socdata;
>  
>  	if (mode == THERMAL_DEVICE_ENABLED) {
>  		tz->polling_delay = IMX_POLLING_DELAY;
>  		tz->passive_delay = IMX_PASSIVE_DELAY;
>  
> -		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
> -		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
> +			     soc_data->power_down_mask);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
> +			     soc_data->measure_temp_mask);
>  
>  		if (!data->irq_enabled) {
>  			data->irq_enabled = true;
>  			enable_irq(data->irq);
>  		}
>  	} else {
> -		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
> -		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
> +			     soc_data->measure_temp_mask);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
> +			     soc_data->power_down_mask);
>  
>  		tz->polling_delay = 0;
>  		tz->passive_delay = 0;
> @@ -359,6 +503,15 @@ static int imx_init_calib(struct platform_device *pdev, u32 val)
>  	}
>  
>  	/*
> +	 * On i.MX7, we only use the calibration data at 25C to get the temp,
> +	 * Tmeas = ( Nmeas - n1) + 25; n1 is the fuse value for 25C.
> +	 */
> +	if (data->socdata->version == TEMPMON_IMX7) {
> +		data->c1 = (val >> 9) & 0x1ff;
> +		return 0;
> +	}
> +
> +	/*
>  	 * Sensor data layout:
>  	 *   [31:20] - sensor value @ 25C
>  	 * Use universal formula now and only need sensor value @ 25C
> @@ -426,6 +579,7 @@ static void imx_init_temp_grade(struct platform_device *pdev, u32 val)
>  
>  static int imx_init_from_tempmon_data(struct platform_device *pdev)
>  {
> +	struct imx_thermal_data *data = platform_get_drvdata(pdev);

const?

>  	struct regmap *map;
>  	int ret;
>  	u32 val;
> @@ -438,7 +592,11 @@ static int imx_init_from_tempmon_data(struct platform_device *pdev)
>  		return ret;
>  	}
>  
> -	ret = regmap_read(map, OCOTP_ANA1, &val);
> +	if (data->socdata->version == TEMPMON_IMX7)
> +		ret = regmap_read(map, IMX7_OCOTP_ANA1, &val);
> +	else
> +		ret = regmap_read(map, IMX6_OCOTP_ANA1, &val);
> +
>  	if (ret) {
>  		dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
>  		return ret;
> @@ -447,7 +605,11 @@ static int imx_init_from_tempmon_data(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
>  
> -	ret = regmap_read(map, OCOTP_MEM0, &val);
> +	/* use OTP for thermal grade */
> +	if (data->socdata->version == TEMPMON_IMX7)
> +		ret = regmap_read(map, IMX7_OCOTP_TESTER3, &val);
> +	else
> +		ret = regmap_read(map, IMX6_OCOTP_MEM0, &val);
>  	if (ret) {
>  		dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
>  		return ret;
> @@ -500,6 +662,7 @@ static irqreturn_t imx_thermal_alarm_irq_thread(int irq, void *dev)
>  static const struct of_device_id of_imx_thermal_match[] = {
>  	{ .compatible = "fsl,imx6q-tempmon", .data = &thermal_imx6q_data, },
>  	{ .compatible = "fsl,imx6sx-tempmon", .data = &thermal_imx6sx_data, },
> +	{ .compatible = "fsl,imx7-tempmon", .data = &thermal_imx7_data, },
>  	{ /* end */ }
>  };
>  MODULE_DEVICE_TABLE(of, of_imx_thermal_match);
> @@ -531,14 +694,15 @@ static int imx_thermal_probe(struct platform_device *pdev)
>  
>  	/* make sure the IRQ flag is clear before enabling irq on i.MX6SX */
>  	if (data->socdata->version == TEMPMON_IMX6SX) {
> -		regmap_write(map, MISC1 + REG_CLR, MISC1_IRQ_TEMPHIGH |
> -			MISC1_IRQ_TEMPLOW | MISC1_IRQ_TEMPPANIC);
> +		regmap_write(map, IMX6_MISC1 + REG_CLR,
> +			IMX6_MISC1_IRQ_TEMPHIGH | IMX6_MISC1_IRQ_TEMPLOW
> +			| IMX6_MISC1_IRQ_TEMPPANIC);
>  		/*
>  		 * reset value of LOW ALARM is incorrect, set it to lowest
>  		 * value to avoid false trigger of low alarm.
>  		 */
> -		regmap_write(map, TEMPSENSE2 + REG_SET,
> -			TEMPSENSE2_LOW_VALUE_MASK);
> +		regmap_write(map, IMX6_TEMPSENSE2 + REG_SET,
> +			IMX6_TEMPSENSE2_LOW_VALUE_MASK);
>  	}

Does MX7 need the same operation?

Regards
Dong Aisheng

>  
>  	data->irq = platform_get_irq(pdev, 0);
> @@ -565,11 +729,17 @@ static int imx_thermal_probe(struct platform_device *pdev)
>  	}
>  
>  	/* Make sure sensor is in known good state for measurements */
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
> -	regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ);
> -	regmap_write(map, MISC0 + REG_SET, MISC0_REFTOP_SELBIASOFF);
> -	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> +		     data->socdata->power_down_mask);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> +		     data->socdata->measure_temp_mask);
> +	regmap_write(map, data->socdata->measure_freq_ctrl + REG_CLR,
> +		     data->socdata->measure_freq_mask);
> +	if (data->socdata->version != TEMPMON_IMX7)
> +		regmap_write(map, IMX6_MISC0 + REG_SET,
> +			IMX6_MISC0_REFTOP_SELBIASOFF);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> +		     data->socdata->power_down_mask);
>  
>  	data->policy = cpufreq_cpu_get(0);
>  	if (!data->policy) {
> @@ -634,16 +804,20 @@ static int imx_thermal_probe(struct platform_device *pdev)
>  		 data->temp_passive / 1000);
>  
>  	/* Enable measurements at ~ 10 Hz */
> -	regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ);
> +	regmap_write(map, data->socdata->measure_freq_ctrl + REG_CLR,
> +		     data->socdata->measure_freq_mask);
>  	measure_freq = DIV_ROUND_UP(32768, 10); /* 10 Hz */
> -	regmap_write(map, TEMPSENSE1 + REG_SET, measure_freq);
> +	regmap_write(map, data->socdata->measure_freq_ctrl + REG_SET,
> +		     measure_freq << data->socdata->measure_freq_shift);
>  	imx_set_alarm_temp(data, data->temp_passive);
>  
>  	if (data->socdata->version == TEMPMON_IMX6SX)
>  		imx_set_panic_temp(data, data->temp_critical);
>  
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
> -	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> +		     data->socdata->power_down_mask);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> +		     data->socdata->measure_temp_mask);
>  
>  	ret = devm_request_threaded_irq(&pdev->dev, data->irq,
>  			imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread,
> @@ -669,7 +843,8 @@ static int imx_thermal_remove(struct platform_device *pdev)
>  	struct regmap *map = data->tempmon;
>  
>  	/* Disable measurements */
> -	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> +		     data->socdata->power_down_mask);
>  	if (!IS_ERR(data->thermal_clk))
>  		clk_disable_unprepare(data->thermal_clk);
>  
> @@ -692,8 +867,10 @@ static int imx_thermal_suspend(struct device *dev)
>  	 * temperature will be read as the thermal sensor is powered
>  	 * down.
>  	 */
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
> -	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> +		     data->socdata->measure_temp_mask);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> +		     data->socdata->power_down_mask);
>  	data->mode = THERMAL_DEVICE_DISABLED;
>  	clk_disable_unprepare(data->thermal_clk);
>  
> @@ -710,8 +887,10 @@ static int imx_thermal_resume(struct device *dev)
>  	if (ret)
>  		return ret;
>  	/* Enabled thermal sensor after resume */
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
> -	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> +		     data->socdata->power_down_mask);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> +		     data->socdata->measure_temp_mask);
>  	data->mode = THERMAL_DEVICE_ENABLED;
>  
>  	return 0;
> -- 
> 2.7.4
> 

RE: [PATCH 2/2] thermal: imx: add i.MX7 thermal sensor support

[Anson Huang]

-----Original Message-----
From: Dong Aisheng [mailto:dongas86@gmail.com] 
Sent: 2018年1月26日 15:00
To: Anson Huang <anson.huang@nxp.com>
Cc: rui.zhang@intel.com; edubezval@gmail.com; robh+dt@kernel.org; mark.rutland@arm.com; shawnguo@kernel.org; kernel@pengutronix.de; Fabio Estevam <fabio.estevam@nxp.com>; linux@armlinux.org.uk; Jacky Bai <ping.bai@nxp.com>; linux-pm@vger.kernel.org; devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-arm-kernel@lists.infradead.org; A.s. Dong <aisheng.dong@nxp.com>; dl-linux-imx <linux-imx@nxp.com>
Subject: Re: [PATCH 2/2] thermal: imx: add i.MX7 thermal sensor support

On Mon, Jan 22, 2018 at 03:25:49PM +0800, Anson Huang wrote:
> This patch adds i.MX7 thermal sensor support, most of the i.MX7 
> thermal sensor functions are same with
> i.MX6 except the registers offset/layout, so we move those registers 
> offset/layout definitions to soc data structure.
> 
> i.MX7 uses single calibration data @25C, the calibration data is 
> located at OCOTP offset 0x4F0, bit[17:9], the formula is as below:
> 
> Tmeas = (Nmeas - n1) + 25; n1 is the fuse value for 25C.
> 
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> Signed-off-by: Bai Ping <ping.bai@nxp.com>

Generally this patch looks fine to me.

Just a few small questions.

> ---
>  drivers/thermal/imx_thermal.c | 315 
> +++++++++++++++++++++++++++++++++---------
>  1 file changed, 247 insertions(+), 68 deletions(-)
> 
> diff --git a/drivers/thermal/imx_thermal.c 
> b/drivers/thermal/imx_thermal.c index e7d4ffc..b2a00d6 100644
> --- a/drivers/thermal/imx_thermal.c
> +++ b/drivers/thermal/imx_thermal.c
> @@ -31,34 +31,58 @@
>  #define REG_CLR		0x8
>  #define REG_TOG		0xc
>  
> -#define MISC0				0x0150
> -#define MISC0_REFTOP_SELBIASOFF		(1 << 3)
> -#define MISC1				0x0160
> -#define MISC1_IRQ_TEMPHIGH		(1 << 29)
> +/* i.MX6 specific */
> +#define IMX6_MISC0				0x0150
> +#define IMX6_MISC0_REFTOP_SELBIASOFF		(1 << 3)
> +#define IMX6_MISC1				0x0160
> +#define IMX6_MISC1_IRQ_TEMPHIGH			(1 << 29)
>  /* Below LOW and PANIC bits are only for TEMPMON_IMX6SX */
> -#define MISC1_IRQ_TEMPLOW		(1 << 28)
> -#define MISC1_IRQ_TEMPPANIC		(1 << 27)
> -
> -#define TEMPSENSE0			0x0180
> -#define TEMPSENSE0_ALARM_VALUE_SHIFT	20
> -#define TEMPSENSE0_ALARM_VALUE_MASK	(0xfff << TEMPSENSE0_ALARM_VALUE_SHIFT)
> -#define TEMPSENSE0_TEMP_CNT_SHIFT	8
> -#define TEMPSENSE0_TEMP_CNT_MASK	(0xfff << TEMPSENSE0_TEMP_CNT_SHIFT)
> -#define TEMPSENSE0_FINISHED		(1 << 2)
> -#define TEMPSENSE0_MEASURE_TEMP		(1 << 1)
> -#define TEMPSENSE0_POWER_DOWN		(1 << 0)
> -
> -#define TEMPSENSE1			0x0190
> -#define TEMPSENSE1_MEASURE_FREQ		0xffff
> -/* Below TEMPSENSE2 is only for TEMPMON_IMX6SX */
> -#define TEMPSENSE2			0x0290
> -#define TEMPSENSE2_LOW_VALUE_SHIFT	0
> -#define TEMPSENSE2_LOW_VALUE_MASK	0xfff
> -#define TEMPSENSE2_PANIC_VALUE_SHIFT	16
> -#define TEMPSENSE2_PANIC_VALUE_MASK	0xfff0000
> +#define IMX6_MISC1_IRQ_TEMPLOW			(1 << 28)
> +#define IMX6_MISC1_IRQ_TEMPPANIC		(1 << 27)
> +
> +#define IMX6_TEMPSENSE0				0x0180
> +#define IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT	20
> +#define IMX6_TEMPSENSE0_ALARM_VALUE_MASK	(0xfff << 20)
> +#define IMX6_TEMPSENSE0_TEMP_CNT_SHIFT		8
> +#define IMX6_TEMPSENSE0_TEMP_CNT_MASK		(0xfff << 8)
> +#define IMX6_TEMPSENSE0_FINISHED		(1 << 2)
> +#define IMX6_TEMPSENSE0_MEASURE_TEMP		(1 << 1)
> +#define IMX6_TEMPSENSE0_POWER_DOWN		(1 << 0)
> +
> +#define IMX6_TEMPSENSE1				0x0190
> +#define IMX6_TEMPSENSE1_MEASURE_FREQ		0xffff
> +#define IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT	0
>  
> -#define OCOTP_MEM0			0x0480
> -#define OCOTP_ANA1			0x04e0
> +/* Below TEMPSENSE2 is only for TEMPMON_IMX6SX */
> +#define IMX6_TEMPSENSE2				0x0290
> +#define IMX6_TEMPSENSE2_LOW_VALUE_SHIFT		0
> +#define IMX6_TEMPSENSE2_LOW_VALUE_MASK		0xfff
> +#define IMX6_TEMPSENSE2_PANIC_VALUE_SHIFT	16
> +#define IMX6_TEMPSENSE2_PANIC_VALUE_MASK	0xfff0000
> +
> +/* i.MX7 specific */
> +#define IMX7_ANADIG_DIGPROG			0x800
> +#define IMX7_TEMPSENSE0				0x300
> +#define IMX7_TEMPSENSE0_PANIC_ALARM_SHIFT	18
> +#define IMX7_TEMPSENSE0_PANIC_ALARM_MASK	(0x1ff << 18)
> +#define IMX7_TEMPSENSE0_HIGH_ALARM_SHIFT	9
> +#define IMX7_TEMPSENSE0_HIGH_ALARM_MASK		(0x1ff << 9)
> +#define IMX7_TEMPSENSE0_LOW_ALARM_SHIFT		0
> +#define IMX7_TEMPSENSE0_LOW_ALARM_MASK		0x1ff
> +
> +#define IMX7_TEMPSENSE1				0x310
> +#define IMX7_TEMPSENSE1_MEASURE_FREQ_SHIFT	16
> +#define IMX7_TEMPSENSE1_MEASURE_FREQ_MASK	(0xffff << 16)
> +#define IMX7_TEMPSENSE1_FINISHED		(1 << 11)
> +#define IMX7_TEMPSENSE1_MEASURE_TEMP		(1 << 10)
> +#define IMX7_TEMPSENSE1_POWER_DOWN		(1 << 9)
> +#define IMX7_TEMPSENSE1_TEMP_VALUE_SHIFT	0
> +#define IMX7_TEMPSENSE1_TEMP_VALUE_MASK		0x1ff
> +
> +#define IMX6_OCOTP_MEM0				0x0480
> +#define IMX6_OCOTP_ANA1				0x04e0
> +#define IMX7_OCOTP_TESTER3			0x0440
> +#define IMX7_OCOTP_ANA1				0x04f0
>  
>  /* The driver supports 1 passive trip point and 1 critical trip point 
> */  enum imx_thermal_trip { @@ -76,17 +100,110 @@ enum 
> imx_thermal_trip {
>  
>  #define TEMPMON_IMX6Q			1
>  #define TEMPMON_IMX6SX			2
> +#define TEMPMON_IMX7			3
>  
>  struct thermal_soc_data {
>  	u32 version;
> +
> +	u32 sensor_ctrl;
> +	u32 power_down_mask;
> +	u32 measure_temp_mask;
> +
> +	u32 measure_freq_ctrl;
> +	u32 measure_freq_mask;
> +	u32 measure_freq_shift;
> +
> +	u32 temp_data;
> +	u32 temp_value_mask;
> +	u32 temp_value_shift;
> +	u32 temp_valid_mask;
> +
> +	u32 panic_alarm_ctrl;
> +	u32 panic_alarm_mask;
> +	u32 panic_alarm_shift;
> +
> +	u32 high_alarm_ctrl;
> +	u32 high_alarm_mask;
> +	u32 high_alarm_shift;
> +
> +	u32 low_alarm_ctrl;
> +	u32 low_alarm_mask;
> +	u32 low_alarm_shift;
>  };
>  
>  static struct thermal_soc_data thermal_imx6q_data = {
>  	.version = TEMPMON_IMX6Q,
> +
> +	.sensor_ctrl = IMX6_TEMPSENSE0,
> +	.power_down_mask = IMX6_TEMPSENSE0_POWER_DOWN,
> +	.measure_temp_mask = IMX6_TEMPSENSE0_MEASURE_TEMP,
> +
> +	.measure_freq_ctrl = IMX6_TEMPSENSE1,
> +	.measure_freq_shift = IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT,
> +	.measure_freq_mask = IMX6_TEMPSENSE1_MEASURE_FREQ,
> +
> +	.temp_data = IMX6_TEMPSENSE0,
> +	.temp_value_mask = IMX6_TEMPSENSE0_TEMP_CNT_MASK,
> +	.temp_value_shift = IMX6_TEMPSENSE0_TEMP_CNT_SHIFT,
> +	.temp_valid_mask = IMX6_TEMPSENSE0_FINISHED,
> +
> +	.high_alarm_ctrl = IMX6_TEMPSENSE0,
> +	.high_alarm_mask = IMX6_TEMPSENSE0_ALARM_VALUE_MASK,
> +	.high_alarm_shift = IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT,
>  };
>  
>  static struct thermal_soc_data thermal_imx6sx_data = {
>  	.version = TEMPMON_IMX6SX,
> +
> +	.sensor_ctrl = IMX6_TEMPSENSE0,
> +	.power_down_mask = IMX6_TEMPSENSE0_POWER_DOWN,
> +	.measure_temp_mask = IMX6_TEMPSENSE0_MEASURE_TEMP,
> +
> +	.measure_freq_ctrl = IMX6_TEMPSENSE1,
> +	.measure_freq_shift = IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT,
> +	.measure_freq_mask = IMX6_TEMPSENSE1_MEASURE_FREQ,
> +
> +	.temp_data = IMX6_TEMPSENSE0,
> +	.temp_value_mask = IMX6_TEMPSENSE0_TEMP_CNT_MASK,
> +	.temp_value_shift = IMX6_TEMPSENSE0_TEMP_CNT_SHIFT,
> +	.temp_valid_mask = IMX6_TEMPSENSE0_FINISHED,
> +
> +	.high_alarm_ctrl = IMX6_TEMPSENSE0,
> +	.high_alarm_mask = IMX6_TEMPSENSE0_ALARM_VALUE_MASK,
> +	.high_alarm_shift = IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT,
> +
> +	.panic_alarm_ctrl = IMX6_TEMPSENSE2,
> +	.panic_alarm_mask = IMX6_TEMPSENSE2_PANIC_VALUE_MASK,
> +	.panic_alarm_shift = IMX6_TEMPSENSE2_PANIC_VALUE_SHIFT,

Missing low_alarm setting here, seems you operate them directly with macros in another place.

Just noticed there is registers write in .probe function, will add low_alarm_xxx for i.MX6SX and replace
the code in .probe function.

Anson.
> +};
> +
> +static struct thermal_soc_data thermal_imx7_data = {
> +	.version = TEMPMON_IMX7,
> +
> +	.sensor_ctrl = IMX7_TEMPSENSE1,
> +	.power_down_mask = IMX7_TEMPSENSE1_POWER_DOWN,
> +	.measure_temp_mask = IMX7_TEMPSENSE1_MEASURE_TEMP,
> +
> +	.measure_freq_ctrl = IMX7_TEMPSENSE1,
> +	.measure_freq_shift = IMX7_TEMPSENSE1_MEASURE_FREQ_SHIFT,
> +	.measure_freq_mask = IMX7_TEMPSENSE1_MEASURE_FREQ_MASK,
> +
> +	.temp_data = IMX7_TEMPSENSE1,
> +	.temp_value_mask = IMX7_TEMPSENSE1_TEMP_VALUE_MASK,
> +	.temp_value_shift = IMX7_TEMPSENSE1_TEMP_VALUE_SHIFT,
> +	.temp_valid_mask = IMX7_TEMPSENSE1_FINISHED,
> +
> +	.panic_alarm_ctrl = IMX7_TEMPSENSE1,
> +	.panic_alarm_mask = IMX7_TEMPSENSE0_PANIC_ALARM_MASK,
> +	.panic_alarm_shift = IMX7_TEMPSENSE0_PANIC_ALARM_SHIFT,
> +
> +	.high_alarm_ctrl = IMX7_TEMPSENSE0,
> +	.high_alarm_mask = IMX7_TEMPSENSE0_HIGH_ALARM_MASK,
> +	.high_alarm_shift = IMX7_TEMPSENSE0_HIGH_ALARM_SHIFT,
> +
> +	.low_alarm_ctrl = IMX7_TEMPSENSE0,
> +	.low_alarm_mask = IMX7_TEMPSENSE0_LOW_ALARM_MASK,
> +	.low_alarm_shift = IMX7_TEMPSENSE0_LOW_ALARM_SHIFT,
>  };
>  
>  struct imx_thermal_data {
> @@ -112,30 +229,44 @@ static void imx_set_panic_temp(struct imx_thermal_data *data,
>  			       int panic_temp)
>  {
>  	struct regmap *map = data->tempmon;
> +	const struct thermal_soc_data *soc_data = data->socdata;
>  	int critical_value;
>  
> -	critical_value = (data->c2 - panic_temp) / data->c1;
> -	regmap_write(map, TEMPSENSE2 + REG_CLR, TEMPSENSE2_PANIC_VALUE_MASK);
> -	regmap_write(map, TEMPSENSE2 + REG_SET, critical_value <<
> -			TEMPSENSE2_PANIC_VALUE_SHIFT);
> +	if (data->socdata->version == TEMPMON_IMX7)

Is there an chance for MX7 to reach here?

MX7D's panic reset only reset SOC, can NOT reset whole board vis wdog, so this function
can NOT be enabled for MX7D, will remove the MX7D path here.

Anson

> +		critical_value = panic_temp / 1000 + data->c1 - 25;
> +	else
> +		critical_value = (data->c2 - panic_temp) / data->c1;
> +
> +	regmap_write(map, soc_data->panic_alarm_ctrl + REG_CLR,
> +		     soc_data->panic_alarm_mask);
> +	regmap_write(map, soc_data->panic_alarm_ctrl + REG_SET,
> +		     critical_value << soc_data->panic_alarm_shift);
>  }
>  
>  static void imx_set_alarm_temp(struct imx_thermal_data *data,
>  			       int alarm_temp)
>  {
>  	struct regmap *map = data->tempmon;
> +	const struct thermal_soc_data *soc_data = data->socdata;
>  	int alarm_value;
>  
>  	data->alarm_temp = alarm_temp;
> -	alarm_value = (data->c2 - alarm_temp) / data->c1;
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_ALARM_VALUE_MASK);
> -	regmap_write(map, TEMPSENSE0 + REG_SET, alarm_value <<
> -			TEMPSENSE0_ALARM_VALUE_SHIFT);
> +
> +	if (data->socdata->version == TEMPMON_IMX7)
> +		alarm_value = alarm_temp / 1000 + data->c1 - 25;
> +	else
> +		alarm_value = (data->c2 - alarm_temp) / data->c1;
> +
> +	regmap_write(map, soc_data->high_alarm_ctrl + REG_CLR,
> +		     soc_data->high_alarm_mask);
> +	regmap_write(map, soc_data->high_alarm_ctrl + REG_SET,
> +		     alarm_value << soc_data->high_alarm_shift);
>  }
>  
>  static int imx_get_temp(struct thermal_zone_device *tz, int *temp)  {
>  	struct imx_thermal_data *data = tz->devdata;
> +	const struct thermal_soc_data *soc_data = data->socdata;
>  	struct regmap *map = data->tempmon;
>  	unsigned int n_meas;
>  	bool wait;
> @@ -143,16 +274,18 @@ static int imx_get_temp(struct 
> thermal_zone_device *tz, int *temp)
>  
>  	if (data->mode == THERMAL_DEVICE_ENABLED) {
>  		/* Check if a measurement is currently in progress */
> -		regmap_read(map, TEMPSENSE0, &val);
> -		wait = !(val & TEMPSENSE0_FINISHED);
> +		regmap_read(map, soc_data->temp_data, &val);
> +		wait = !(val & soc_data->temp_valid_mask);
>  	} else {
>  		/*
>  		 * Every time we measure the temperature, we will power on the
>  		 * temperature sensor, enable measurements, take a reading,
>  		 * disable measurements, power off the temperature sensor.
>  		 */
> -		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
> -		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
> +			    soc_data->power_down_mask);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
> +			    soc_data->measure_temp_mask);
>  
>  		wait = true;
>  	}
> @@ -164,22 +297,28 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
>  	if (wait)
>  		usleep_range(20, 50);
>  
> -	regmap_read(map, TEMPSENSE0, &val);
> +	regmap_read(map, soc_data->temp_data, &val);
>  
>  	if (data->mode != THERMAL_DEVICE_ENABLED) {
> -		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
> -		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
> +			     soc_data->measure_temp_mask);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
> +			     soc_data->power_down_mask);
>  	}
>  
> -	if ((val & TEMPSENSE0_FINISHED) == 0) {
> +	if ((val & soc_data->temp_valid_mask) == 0) {
>  		dev_dbg(&tz->device, "temp measurement never finished\n");
>  		return -EAGAIN;
>  	}
>  
> -	n_meas = (val & TEMPSENSE0_TEMP_CNT_MASK) >> TEMPSENSE0_TEMP_CNT_SHIFT;
> +	n_meas = (val & soc_data->temp_value_mask)
> +		>> soc_data->temp_value_shift;
>  
>  	/* See imx_init_calib() for formula derivation */
> -	*temp = data->c2 - n_meas * data->c1;
> +	if (data->socdata->version == TEMPMON_IMX7)
> +		*temp = (n_meas - data->c1 + 25) * 1000;
> +	else
> +		*temp = data->c2 - n_meas * data->c1;
>  
>  	/* Update alarm value to next higher trip point for TEMPMON_IMX6Q */
>  	if (data->socdata->version == TEMPMON_IMX6Q) { @@ -223,21 +362,26 @@ 
> static int imx_set_mode(struct thermal_zone_device *tz,  {
>  	struct imx_thermal_data *data = tz->devdata;
>  	struct regmap *map = data->tempmon;
> +	const struct thermal_soc_data *soc_data = data->socdata;
>  
>  	if (mode == THERMAL_DEVICE_ENABLED) {
>  		tz->polling_delay = IMX_POLLING_DELAY;
>  		tz->passive_delay = IMX_PASSIVE_DELAY;
>  
> -		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
> -		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
> +			     soc_data->power_down_mask);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
> +			     soc_data->measure_temp_mask);
>  
>  		if (!data->irq_enabled) {
>  			data->irq_enabled = true;
>  			enable_irq(data->irq);
>  		}
>  	} else {
> -		regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
> -		regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
> +			     soc_data->measure_temp_mask);
> +		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
> +			     soc_data->power_down_mask);
>  
>  		tz->polling_delay = 0;
>  		tz->passive_delay = 0;
> @@ -359,6 +503,15 @@ static int imx_init_calib(struct platform_device *pdev, u32 val)
>  	}
>  
>  	/*
> +	 * On i.MX7, we only use the calibration data at 25C to get the temp,
> +	 * Tmeas = ( Nmeas - n1) + 25; n1 is the fuse value for 25C.
> +	 */
> +	if (data->socdata->version == TEMPMON_IMX7) {
> +		data->c1 = (val >> 9) & 0x1ff;
> +		return 0;
> +	}
> +
> +	/*
>  	 * Sensor data layout:
>  	 *   [31:20] - sensor value @ 25C
>  	 * Use universal formula now and only need sensor value @ 25C @@ 
> -426,6 +579,7 @@ static void imx_init_temp_grade(struct 
> platform_device *pdev, u32 val)
>  
>  static int imx_init_from_tempmon_data(struct platform_device *pdev)  
> {
> +	struct imx_thermal_data *data = platform_get_drvdata(pdev);

const?

agree.

Anson

>  	struct regmap *map;
>  	int ret;
>  	u32 val;
> @@ -438,7 +592,11 @@ static int imx_init_from_tempmon_data(struct platform_device *pdev)
>  		return ret;
>  	}
>  
> -	ret = regmap_read(map, OCOTP_ANA1, &val);
> +	if (data->socdata->version == TEMPMON_IMX7)
> +		ret = regmap_read(map, IMX7_OCOTP_ANA1, &val);
> +	else
> +		ret = regmap_read(map, IMX6_OCOTP_ANA1, &val);
> +
>  	if (ret) {
>  		dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
>  		return ret;
> @@ -447,7 +605,11 @@ static int imx_init_from_tempmon_data(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
>  
> -	ret = regmap_read(map, OCOTP_MEM0, &val);
> +	/* use OTP for thermal grade */
> +	if (data->socdata->version == TEMPMON_IMX7)
> +		ret = regmap_read(map, IMX7_OCOTP_TESTER3, &val);
> +	else
> +		ret = regmap_read(map, IMX6_OCOTP_MEM0, &val);
>  	if (ret) {
>  		dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret);
>  		return ret;
> @@ -500,6 +662,7 @@ static irqreturn_t 
> imx_thermal_alarm_irq_thread(int irq, void *dev)  static const struct of_device_id of_imx_thermal_match[] = {
>  	{ .compatible = "fsl,imx6q-tempmon", .data = &thermal_imx6q_data, },
>  	{ .compatible = "fsl,imx6sx-tempmon", .data = &thermal_imx6sx_data, 
> },
> +	{ .compatible = "fsl,imx7-tempmon", .data = &thermal_imx7_data, },
>  	{ /* end */ }
>  };
>  MODULE_DEVICE_TABLE(of, of_imx_thermal_match); @@ -531,14 +694,15 @@ 
> static int imx_thermal_probe(struct platform_device *pdev)
>  
>  	/* make sure the IRQ flag is clear before enabling irq on i.MX6SX */
>  	if (data->socdata->version == TEMPMON_IMX6SX) {
> -		regmap_write(map, MISC1 + REG_CLR, MISC1_IRQ_TEMPHIGH |
> -			MISC1_IRQ_TEMPLOW | MISC1_IRQ_TEMPPANIC);
> +		regmap_write(map, IMX6_MISC1 + REG_CLR,
> +			IMX6_MISC1_IRQ_TEMPHIGH | IMX6_MISC1_IRQ_TEMPLOW
> +			| IMX6_MISC1_IRQ_TEMPPANIC);
>  		/*
>  		 * reset value of LOW ALARM is incorrect, set it to lowest
>  		 * value to avoid false trigger of low alarm.
>  		 */
> -		regmap_write(map, TEMPSENSE2 + REG_SET,
> -			TEMPSENSE2_LOW_VALUE_MASK);
> +		regmap_write(map, IMX6_TEMPSENSE2 + REG_SET,
> +			IMX6_TEMPSENSE2_LOW_VALUE_MASK);
>  	}

Does MX7 need the same operation?

MX7D does NOT need this.

Will do all changes in V2, thanks.

Anson.

Regards
Dong Aisheng

>  
>  	data->irq = platform_get_irq(pdev, 0); @@ -565,11 +729,17 @@ static 
> int imx_thermal_probe(struct platform_device *pdev)
>  	}
>  
>  	/* Make sure sensor is in known good state for measurements */
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
> -	regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ);
> -	regmap_write(map, MISC0 + REG_SET, MISC0_REFTOP_SELBIASOFF);
> -	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> +		     data->socdata->power_down_mask);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> +		     data->socdata->measure_temp_mask);
> +	regmap_write(map, data->socdata->measure_freq_ctrl + REG_CLR,
> +		     data->socdata->measure_freq_mask);
> +	if (data->socdata->version != TEMPMON_IMX7)
> +		regmap_write(map, IMX6_MISC0 + REG_SET,
> +			IMX6_MISC0_REFTOP_SELBIASOFF);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> +		     data->socdata->power_down_mask);
>  
>  	data->policy = cpufreq_cpu_get(0);
>  	if (!data->policy) {
> @@ -634,16 +804,20 @@ static int imx_thermal_probe(struct platform_device *pdev)
>  		 data->temp_passive / 1000);
>  
>  	/* Enable measurements at ~ 10 Hz */
> -	regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ);
> +	regmap_write(map, data->socdata->measure_freq_ctrl + REG_CLR,
> +		     data->socdata->measure_freq_mask);
>  	measure_freq = DIV_ROUND_UP(32768, 10); /* 10 Hz */
> -	regmap_write(map, TEMPSENSE1 + REG_SET, measure_freq);
> +	regmap_write(map, data->socdata->measure_freq_ctrl + REG_SET,
> +		     measure_freq << data->socdata->measure_freq_shift);
>  	imx_set_alarm_temp(data, data->temp_passive);
>  
>  	if (data->socdata->version == TEMPMON_IMX6SX)
>  		imx_set_panic_temp(data, data->temp_critical);
>  
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
> -	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> +		     data->socdata->power_down_mask);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> +		     data->socdata->measure_temp_mask);
>  
>  	ret = devm_request_threaded_irq(&pdev->dev, data->irq,
>  			imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread, @@ -669,7 
> +843,8 @@ static int imx_thermal_remove(struct platform_device *pdev)
>  	struct regmap *map = data->tempmon;
>  
>  	/* Disable measurements */
> -	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> +		     data->socdata->power_down_mask);
>  	if (!IS_ERR(data->thermal_clk))
>  		clk_disable_unprepare(data->thermal_clk);
>  
> @@ -692,8 +867,10 @@ static int imx_thermal_suspend(struct device *dev)
>  	 * temperature will be read as the thermal sensor is powered
>  	 * down.
>  	 */
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
> -	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> +		     data->socdata->measure_temp_mask);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> +		     data->socdata->power_down_mask);
>  	data->mode = THERMAL_DEVICE_DISABLED;
>  	clk_disable_unprepare(data->thermal_clk);
>  
> @@ -710,8 +887,10 @@ static int imx_thermal_resume(struct device *dev)
>  	if (ret)
>  		return ret;
>  	/* Enabled thermal sensor after resume */
> -	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
> -	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_CLR,
> +		     data->socdata->power_down_mask);
> +	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
> +		     data->socdata->measure_temp_mask);
>  	data->mode = THERMAL_DEVICE_ENABLED;
>  
>  	return 0;
> --
> 2.7.4
>