[PATCH 0/3] thermal: Add Mediatek thermal driver for mt2701

[PATCH 0/3] thermal: Add Mediatek thermal driver for mt2701

[Dawei Chien]

This series support for mt2701 chip to mtk_thermal.c,
and integrate both mt8173 and mt2701 on the same driver.
MT8173 has four banks and five sensors, and MT2701 has
only one bank and three sensors.

[PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Dawei Chien]

This adds the device tree binding documentation for the mediatek thermal
controller found on Mediatek MT2701.

Signed-off-by: Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
---
 .../bindings/thermal/mediatek-thermal.txt          |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
index 81f9a51..bb55e79 100644
--- a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
+++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
@@ -8,7 +8,7 @@ apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
 is also needed.
 
 Required properties:
-- compatible: "mediatek,mt8173-thermal"
+- compatible: "mediatek,mt8173-thermal" or "mediatek,mt2701-thermal"
 - reg: Address range of the thermal controller
 - interrupts: IRQ for the thermal controller
 - clocks, clock-names: Clocks needed for the thermal controller. required
-- 
1.7.9.5

Re: [PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Keerthy]

On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
> This adds the device tree binding documentation for the mediatek thermal
> controller found on Mediatek MT2701.
>
> Signed-off-by: Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> ---
>   .../bindings/thermal/mediatek-thermal.txt          |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> index 81f9a51..bb55e79 100644
> --- a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> +++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> @@ -8,7 +8,7 @@ apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
>   is also needed.
>
>   Required properties:
> -- compatible: "mediatek,mt8173-thermal"
> +- compatible: "mediatek,mt8173-thermal" or "mediatek,mt2701-thermal"

- compatible :
  - "mediatek,mt8173-thermal" : For MT8173 family of SoCs
  - "mediatek,mt2701-thermal" : For MT2701 family of SoCs

>   - reg: Address range of the thermal controller
>   - interrupts: IRQ for the thermal controller
>   - clocks, clock-names: Clocks needed for the thermal controller. required
>

Re: [PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[dawei chien]

Dear Keerthy,

On Thu, 2016-07-07 at 16:39 +0530, Keerthy wrote:
> 
> On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
> > This adds the device tree binding documentation for the mediatek thermal
> > controller found on Mediatek MT2701.
> >
> > Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
> > ---
> >   .../bindings/thermal/mediatek-thermal.txt          |    2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> > index 81f9a51..bb55e79 100644
> > --- a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> > +++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> > @@ -8,7 +8,7 @@ apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
> >   is also needed.
> >
> >   Required properties:
> > -- compatible: "mediatek,mt8173-thermal"
> > +- compatible: "mediatek,mt8173-thermal" or "mediatek,mt2701-thermal"
> 
> - compatible :
>   - "mediatek,mt8173-thermal" : For MT8173 family of SoCs
>   - "mediatek,mt2701-thermal" : For MT2701 family of SoCs

Thank you, I will update it on next version.

> 
> >   - reg: Address range of the thermal controller
> >   - interrupts: IRQ for the thermal controller
> >   - clocks, clock-names: Clocks needed for the thermal controller. required
> >

Re: [PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Matthias Brugger]

On 11/07/16 10:52, dawei chien wrote:
> Dear Keerthy,
>
> On Thu, 2016-07-07 at 16:39 +0530, Keerthy wrote:
>>
>> On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
>>> This adds the device tree binding documentation for the mediatek thermal
>>> controller found on Mediatek MT2701.
>>>
>>> Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
>>> ---
>>>   .../bindings/thermal/mediatek-thermal.txt          |    2 +-
>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
>>> index 81f9a51..bb55e79 100644
>>> --- a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
>>> +++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
>>> @@ -8,7 +8,7 @@ apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
>>>   is also needed.
>>>
>>>   Required properties:
>>> -- compatible: "mediatek,mt8173-thermal"
>>> +- compatible: "mediatek,mt8173-thermal" or "mediatek,mt2701-thermal"
>>
>> - compatible :
>>   - "mediatek,mt8173-thermal" : For MT8173 family of SoCs
>>   - "mediatek,mt2701-thermal" : For MT2701 family of SoCs
>
> Thank you, I will update it on next version.
>

Do you know about the compability to older SoCs (e.g. mt6589)?
It might make sense to add mediatek,mtk-thermal if they are compatible 
or nearly compatible.

>>
>>>   - reg: Address range of the thermal controller
>>>   - interrupts: IRQ for the thermal controller
>>>   - clocks, clock-names: Clocks needed for the thermal controller. required
>>>
>
>

Re: [PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[dawei chien]

Hi Matthias,

On Thu, 2016-08-11 at 17:48 +0200, Matthias Brugger wrote:
> 
> On 11/07/16 10:52, dawei chien wrote:
> > Dear Keerthy,
> >
> > On Thu, 2016-07-07 at 16:39 +0530, Keerthy wrote:
> >>
> >> On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
> >>> This adds the device tree binding documentation for the mediatek thermal
> >>> controller found on Mediatek MT2701.
> >>>
> >>> Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
> >>> ---
> >>>   .../bindings/thermal/mediatek-thermal.txt          |    2 +-
> >>>   1 file changed, 1 insertion(+), 1 deletion(-)
> >>>
> >>> diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> >>> index 81f9a51..bb55e79 100644
> >>> --- a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> >>> +++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> >>> @@ -8,7 +8,7 @@ apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
> >>>   is also needed.
> >>>
> >>>   Required properties:
> >>> -- compatible: "mediatek,mt8173-thermal"
> >>> +- compatible: "mediatek,mt8173-thermal" or "mediatek,mt2701-thermal"
> >>
> >> - compatible :
> >>   - "mediatek,mt8173-thermal" : For MT8173 family of SoCs
> >>   - "mediatek,mt2701-thermal" : For MT2701 family of SoCs
> >
> > Thank you, I will update it on next version.
> >
> 
> Do you know about the compability to older SoCs (e.g. mt6589)?
> It might make sense to add mediatek,mtk-thermal if they are compatible 
> or nearly compatible.

I agree with you that we should add mediatek,mtk-thermal for compatible
or nearly compatible SoC.
However, there is no more compatible SoC so far. Once we have such new
nearly compatible SoC, we would update it on this binding document soon,
thank you.

BR,
Dawei

> >>
> >>>   - reg: Address range of the thermal controller
> >>>   - interrupts: IRQ for the thermal controller
> >>>   - clocks, clock-names: Clocks needed for the thermal controller. required
> >>>
> >
> >

[PATCH 2/3] thermal: Add Mediatek thermal driver for mt2701.

[Dawei Chien]

This patch adds support for mt2701 chip to mtk_thermal.c,
and integrate both mt8173 and mt2701 on the same driver.
MT8173 has four banks and five sensors, and MT2701 has
only one bank and three sensors.

Signed-off-by: Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
---
 drivers/thermal/mtk_thermal.c |  258 ++++++++++++++++++++++++++---------------
 1 file changed, 165 insertions(+), 93 deletions(-)

diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
index 262ab0a..860f2e2 100644
--- a/drivers/thermal/mtk_thermal.c
+++ b/drivers/thermal/mtk_thermal.c
@@ -2,6 +2,7 @@
  * Copyright (c) 2015 MediaTek Inc.
  * Author: Hanyi Wu <hanyi.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
  *         Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
+ *         Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -21,6 +22,7 @@
 #include <linux/nvmem-consumer.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/io.h>
@@ -88,6 +90,7 @@
 #define TEMP_ADCVALIDMASK_VALID_HIGH		BIT(5)
 #define TEMP_ADCVALIDMASK_VALID_POS(bit)	(bit)
 
+/* MT8173 thermal sensors */
 #define MT8173_TS1	0
 #define MT8173_TS2	1
 #define MT8173_TS3	2
@@ -97,35 +100,62 @@
 /* AUXADC channel 11 is used for the temperature sensors */
 #define MT8173_TEMP_AUXADC_CHANNEL	11
 
-/* The total number of temperature sensors in the MT8173 */
-#define MT8173_NUM_SENSORS		5
-
-/* The number of banks in the MT8173 */
-#define MT8173_NUM_ZONES		4
-
-/* The number of sensing points per bank */
-#define MT8173_NUM_SENSORS_PER_ZONE	4
-
 /* Layout of the fuses providing the calibration data */
-#define MT8173_CALIB_BUF0_VALID		BIT(0)
-#define MT8173_CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
-#define MT8173_CALIB_BUF0_VTS_TS1(x)	(((x) >> 17) & 0x1ff)
-#define MT8173_CALIB_BUF0_VTS_TS2(x)	(((x) >> 8) & 0x1ff)
-#define MT8173_CALIB_BUF1_VTS_TS3(x)	(((x) >> 0) & 0x1ff)
-#define MT8173_CALIB_BUF2_VTS_TS4(x)	(((x) >> 23) & 0x1ff)
-#define MT8173_CALIB_BUF2_VTS_TSABB(x)	(((x) >> 14) & 0x1ff)
-#define MT8173_CALIB_BUF0_DEGC_CALI(x)	(((x) >> 1) & 0x3f)
-#define MT8173_CALIB_BUF0_O_SLOPE(x)	(((x) >> 26) & 0x3f)
+#define CALIB_BUF0_VALID		BIT(0)
+#define CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
+#define CALIB_BUF0_VTS_TS1(x)	(((x) >> 17) & 0x1ff)
+#define CALIB_BUF0_VTS_TS2(x)	(((x) >> 8) & 0x1ff)
+#define CALIB_BUF1_VTS_TS3(x)	(((x) >> 0) & 0x1ff)
+#define CALIB_BUF2_VTS_TS4(x)	(((x) >> 23) & 0x1ff)
+#define CALIB_BUF2_VTS_TS5(x)	(((x) >> 14) & 0x1ff)
+#define CALIB_BUF0_DEGC_CALI(x)	(((x) >> 1) & 0x3f)
+#define CALIB_BUF0_O_SLOPE(x)	(((x) >> 26) & 0x3f)
+
+#define NVMEM_TS1	0
+#define NVMEM_TS2	1
+#define NVMEM_TS3	2
+#define NVMEM_TS4	3
+#define NVMEM_TS5	4
+
+/* MT2701 thermal sensors */
+#define MT2701_TS1	0
+#define MT2701_TS2	1
+#define MT2701_TSABB	2
+
+/* AUXADC channel 11 is used for the temperature sensors */
+#define MT2701_TEMP_AUXADC_CHANNEL	11
 
 #define THERMAL_NAME    "mtk-thermal"
 
+/* Maximum support banks */
+#define MAX_NUM_BANK		5
+
 struct mtk_thermal;
 
+struct thermal_bank_cfg {
+	unsigned int num_sensors;
+	unsigned int sensors[MAX_NUM_BANK];
+};
+
 struct mtk_thermal_bank {
 	struct mtk_thermal *mt;
 	int id;
 };
 
+struct mtk_thermal_sense_point {
+	int msr;
+	int adcpnp;
+};
+
+struct mtk_thermal_data {
+	struct thermal_bank_cfg bank_data[MAX_NUM_BANK];
+	struct mtk_thermal_sense_point sensing_points[MAX_NUM_BANK];
+	int sensor_mux_values[MAX_NUM_BANK];
+	s32 num_banks;
+	s32 num_sensors;
+	s32 auxadc_channel;
+};
+
 struct mtk_thermal {
 	struct device *dev;
 	void __iomem *thermal_base;
@@ -133,27 +163,20 @@ struct mtk_thermal {
 	struct clk *clk_peri_therm;
 	struct clk *clk_auxadc;
 
-	struct mtk_thermal_bank banks[MT8173_NUM_ZONES];
-
+	struct mtk_thermal_bank banks[MAX_NUM_BANK];
+	const struct mtk_thermal_data *conf;
 	/* lock: for getting and putting banks */
 	struct mutex lock;
+	struct thermal_zone_device *tzd;
 
 	/* Calibration values */
 	s32 adc_ge;
 	s32 degc_cali;
 	s32 o_slope;
-	s32 vts[MT8173_NUM_SENSORS];
-
-};
-
-struct mtk_thermal_bank_cfg {
-	unsigned int num_sensors;
-	unsigned int sensors[MT8173_NUM_SENSORS_PER_ZONE];
+	s32 vts[MAX_NUM_BANK];
 };
 
-static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
-
-/*
+/**
  * The MT8173 thermal controller has four banks. Each bank can read up to
  * four temperature sensors simultaneously. The MT8173 has a total of 5
  * temperature sensors. We use each bank to measure a certain area of the
@@ -166,42 +189,76 @@ static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
  * data, and this indeed needs the temperatures of the individual banks
  * for making better decisions.
  */
-static const struct mtk_thermal_bank_cfg bank_data[] = {
-	{
-		.num_sensors = 2,
-		.sensors = { MT8173_TS2, MT8173_TS3 },
-	}, {
-		.num_sensors = 2,
-		.sensors = { MT8173_TS2, MT8173_TS4 },
-	}, {
-		.num_sensors = 3,
-		.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
-	}, {
-		.num_sensors = 1,
-		.sensors = { MT8173_TS2 },
+static const struct mtk_thermal_data mt8173_thermal_data = {
+	.auxadc_channel = MT8173_TEMP_AUXADC_CHANNEL,
+	.num_banks = 4,
+	.num_sensors = 5,
+	.bank_data = {
+		{
+			.num_sensors = 2,
+			.sensors = { MT8173_TS2, MT8173_TS3 },
+		}, {
+			.num_sensors = 2,
+			.sensors = { MT8173_TS2, MT8173_TS4 },
+		}, {
+			.num_sensors = 3,
+			.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
+		}, {
+			.num_sensors = 1,
+			.sensors = { MT8173_TS2 },
+		},
 	},
+	.sensing_points = {
+		{
+			.msr = TEMP_MSR0,
+			.adcpnp = TEMP_ADCPNP0,
+		}, {
+			.msr = TEMP_MSR1,
+			.adcpnp = TEMP_ADCPNP1,
+		}, {
+			.msr = TEMP_MSR2,
+			.adcpnp = TEMP_ADCPNP2,
+		}, {
+			.msr = TEMP_MSR3,
+			.adcpnp = TEMP_ADCPNP3,
+		},
+	},
+	.sensor_mux_values = { 0, 1, 2, 3, 16 },
 };
 
-struct mtk_thermal_sense_point {
-	int msr;
-	int adcpnp;
-};
-
-static const struct mtk_thermal_sense_point
-		sensing_points[MT8173_NUM_SENSORS_PER_ZONE] = {
-	{
-		.msr = TEMP_MSR0,
-		.adcpnp = TEMP_ADCPNP0,
-	}, {
-		.msr = TEMP_MSR1,
-		.adcpnp = TEMP_ADCPNP1,
-	}, {
-		.msr = TEMP_MSR2,
-		.adcpnp = TEMP_ADCPNP2,
-	}, {
-		.msr = TEMP_MSR3,
-		.adcpnp = TEMP_ADCPNP3,
+/**
+ * The MT2701 thermal controller has one bank, which can read up to
+ * three temperature sensors simultaneously. The MT2701 has a total of 3
+ * temperature sensors.
+ *
+ * The thermal core only gets the maximum temperature of this one bank,
+ * so the bank concept wouldn't be necessary here. However, the SVS (Smart
+ * Voltage Scaling) unit makes its decisions based on the same bank
+ * data.
+ */
+static const struct mtk_thermal_data mt2701_thermal_data = {
+	.auxadc_channel = MT2701_TEMP_AUXADC_CHANNEL,
+	.num_banks = 1,
+	.num_sensors = 3,
+	.bank_data = {
+		{
+			.num_sensors = 3,
+			.sensors = { MT2701_TS1, MT2701_TS2, MT2701_TSABB },
+		},
 	},
+	.sensing_points = {
+		{
+			.msr = TEMP_MSR0,
+			.adcpnp = TEMP_ADCPNP0,
+		}, {
+			.msr = TEMP_MSR1,
+			.adcpnp = TEMP_ADCPNP1,
+		}, {
+			.msr = TEMP_MSR2,
+			.adcpnp = TEMP_ADCPNP2,
+		},
+	},
+	.sensor_mux_values = { 0, 1, 16},
 };
 
 /**
@@ -270,13 +327,15 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
 static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
 {
 	struct mtk_thermal *mt = bank->mt;
+	const struct mtk_thermal_data *conf = mt->conf;
 	int i, temp = INT_MIN, max = INT_MIN;
 	u32 raw;
 
-	for (i = 0; i < bank_data[bank->id].num_sensors; i++) {
-		raw = readl(mt->thermal_base + sensing_points[i].msr);
+	for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
+		raw = readl(mt->thermal_base + conf->sensing_points[i].msr);
 
-		temp = raw_to_mcelsius(mt, bank_data[bank->id].sensors[i], raw);
+		temp = raw_to_mcelsius(mt, conf->bank_data[bank->id].sensors[i],
+				       raw);
 
 		/*
 		 * The first read of a sensor often contains very high bogus
@@ -299,7 +358,7 @@ static int mtk_read_temp(void *data, int *temperature)
 	int i;
 	int tempmax = INT_MIN;
 
-	for (i = 0; i < MT8173_NUM_ZONES; i++) {
+	for (i = 0; i < mt->conf->num_banks; i++) {
 		struct mtk_thermal_bank *bank = &mt->banks[i];
 
 		mtk_thermal_get_bank(bank);
@@ -322,7 +381,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
 				  u32 apmixed_phys_base, u32 auxadc_phys_base)
 {
 	struct mtk_thermal_bank *bank = &mt->banks[num];
-	const struct mtk_thermal_bank_cfg *cfg = &bank_data[num];
+	const struct mtk_thermal_data *conf = mt->conf;
 	int i;
 
 	bank->id = num;
@@ -368,7 +427,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
 	 * this value will be stored to TEMP_PNPMUXADDR (TEMP_SPARE0)
 	 * automatically by hw
 	 */
-	writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCMUX);
+	writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCMUX);
 
 	/* AHB address for auxadc mux selection */
 	writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
@@ -379,18 +438,18 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
 	       mt->thermal_base + TEMP_PNPMUXADDR);
 
 	/* AHB value for auxadc enable */
-	writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCEN);
+	writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCEN);
 
 	/* AHB address for auxadc enable (channel 0 immediate mode selected) */
 	writel(auxadc_phys_base + AUXADC_CON1_SET_V,
 	       mt->thermal_base + TEMP_ADCENADDR);
 
 	/* AHB address for auxadc valid bit */
-	writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
+	writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
 	       mt->thermal_base + TEMP_ADCVALIDADDR);
 
 	/* AHB address for auxadc voltage output */
-	writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
+	writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
 	       mt->thermal_base + TEMP_ADCVOLTADDR);
 
 	/* read valid & voltage are at the same register */
@@ -407,11 +466,12 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
 	writel(TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
 	       mt->thermal_base + TEMP_ADCWRITECTRL);
 
-	for (i = 0; i < cfg->num_sensors; i++)
-		writel(sensor_mux_values[cfg->sensors[i]],
-		       mt->thermal_base + sensing_points[i].adcpnp);
+	for (i = 0; i < conf->bank_data[num].num_sensors; i++)
+		writel(conf->sensor_mux_values[conf->bank_data[num].sensors[i]],
+		       mt->thermal_base + conf->sensing_points[i].adcpnp);
 
-	writel((1 << cfg->num_sensors) - 1, mt->thermal_base + TEMP_MONCTL0);
+	writel((1 << conf->bank_data[num].num_sensors) - 1,
+	       mt->thermal_base + TEMP_MONCTL0);
 
 	writel(TEMP_ADCWRITECTRL_ADC_PNP_WRITE |
 	       TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
@@ -442,7 +502,7 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
 
 	/* Start with default values */
 	mt->adc_ge = 512;
-	for (i = 0; i < MT8173_NUM_SENSORS; i++)
+	for (i = 0; i < mt->conf->num_sensors; i++)
 		mt->vts[i] = 260;
 	mt->degc_cali = 40;
 	mt->o_slope = 0;
@@ -467,15 +527,15 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
 		goto out;
 	}
 
-	if (buf[0] & MT8173_CALIB_BUF0_VALID) {
-		mt->adc_ge = MT8173_CALIB_BUF1_ADC_GE(buf[1]);
-		mt->vts[MT8173_TS1] = MT8173_CALIB_BUF0_VTS_TS1(buf[0]);
-		mt->vts[MT8173_TS2] = MT8173_CALIB_BUF0_VTS_TS2(buf[0]);
-		mt->vts[MT8173_TS3] = MT8173_CALIB_BUF1_VTS_TS3(buf[1]);
-		mt->vts[MT8173_TS4] = MT8173_CALIB_BUF2_VTS_TS4(buf[2]);
-		mt->vts[MT8173_TSABB] = MT8173_CALIB_BUF2_VTS_TSABB(buf[2]);
-		mt->degc_cali = MT8173_CALIB_BUF0_DEGC_CALI(buf[0]);
-		mt->o_slope = MT8173_CALIB_BUF0_O_SLOPE(buf[0]);
+	if (buf[0] & CALIB_BUF0_VALID) {
+		mt->adc_ge = CALIB_BUF1_ADC_GE(buf[1]);
+		mt->vts[NVMEM_TS1] = CALIB_BUF0_VTS_TS1(buf[0]);
+		mt->vts[NVMEM_TS2] = CALIB_BUF0_VTS_TS2(buf[0]);
+		mt->vts[NVMEM_TS3] = CALIB_BUF1_VTS_TS3(buf[1]);
+		mt->vts[NVMEM_TS4] = CALIB_BUF2_VTS_TS4(buf[1]);
+		mt->vts[NVMEM_TS5] = CALIB_BUF2_VTS_TS5(buf[2]);
+		mt->degc_cali = CALIB_BUF0_DEGC_CALI(buf[0]);
+		mt->o_slope = CALIB_BUF0_O_SLOPE(buf[0]);
 	} else {
 		dev_info(dev, "Device not calibrated, using default calibration values\n");
 	}
@@ -486,18 +546,36 @@ out:
 	return ret;
 }
 
+static const struct of_device_id mtk_thermal_of_match[] = {
+	{
+		.compatible = "mediatek,mt8173-thermal",
+		.data = (void *)&mt8173_thermal_data,
+	},
+	{
+		.compatible = "mediatek,mt2701-thermal",
+		.data = (void *)&mt2701_thermal_data,
+	}, {
+	},
+};
+MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);
+
 static int mtk_thermal_probe(struct platform_device *pdev)
 {
 	int ret, i;
 	struct device_node *auxadc, *apmixedsys, *np = pdev->dev.of_node;
 	struct mtk_thermal *mt;
 	struct resource *res;
+	const struct of_device_id *of_id;
 	u64 auxadc_phys_base, apmixed_phys_base;
 
 	mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
 	if (!mt)
 		return -ENOMEM;
 
+	of_id = of_match_device(mtk_thermal_of_match, &pdev->dev);
+	if (of_id)
+		mt->conf = (const struct mtk_thermal_data *)of_id->data;
+
 	mt->clk_peri_therm = devm_clk_get(&pdev->dev, "therm");
 	if (IS_ERR(mt->clk_peri_therm))
 		return PTR_ERR(mt->clk_peri_therm);
@@ -565,7 +643,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 		goto err_disable_clk_auxadc;
 	}
 
-	for (i = 0; i < MT8173_NUM_ZONES; i++)
+	for (i = 0; i < mt->conf->num_banks; i++)
 		mtk_thermal_init_bank(mt, i, apmixed_phys_base,
 				      auxadc_phys_base);
 
@@ -592,13 +670,6 @@ static int mtk_thermal_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct of_device_id mtk_thermal_of_match[] = {
-	{
-		.compatible = "mediatek,mt8173-thermal",
-	}, {
-	},
-};
-
 static struct platform_driver mtk_thermal_driver = {
 	.probe = mtk_thermal_probe,
 	.remove = mtk_thermal_remove,
@@ -610,6 +681,7 @@ static struct platform_driver mtk_thermal_driver = {
 
 module_platform_driver(mtk_thermal_driver);
 
+MODULE_AUTHOR("Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>");
 MODULE_AUTHOR("Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>");
 MODULE_AUTHOR("Hanyi Wu <hanyi.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>");
 MODULE_DESCRIPTION("Mediatek thermal driver");
-- 
1.7.9.5

Re: [PATCH 2/3] thermal: Add Mediatek thermal driver for mt2701.

[Keerthy]

Hi Dawei Chien,


On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
> This patch adds support for mt2701 chip to mtk_thermal.c,
> and integrate both mt8173 and mt2701 on the same driver.
> MT8173 has four banks and five sensors, and MT2701 has
> only one bank and three sensors.
>
> Signed-off-by: Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> ---
>   drivers/thermal/mtk_thermal.c |  258 ++++++++++++++++++++++++++---------------
>   1 file changed, 165 insertions(+), 93 deletions(-)
>
> diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
> index 262ab0a..860f2e2 100644
> --- a/drivers/thermal/mtk_thermal.c
> +++ b/drivers/thermal/mtk_thermal.c
> @@ -2,6 +2,7 @@
>    * Copyright (c) 2015 MediaTek Inc.
>    * Author: Hanyi Wu <hanyi.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
>    *         Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
> + *         Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
>    *
>    * This program is free software; you can redistribute it and/or modify
>    * it under the terms of the GNU General Public License version 2 as
> @@ -21,6 +22,7 @@
>   #include <linux/nvmem-consumer.h>
>   #include <linux/of.h>
>   #include <linux/of_address.h>
> +#include <linux/of_device.h>
>   #include <linux/platform_device.h>
>   #include <linux/slab.h>
>   #include <linux/io.h>
> @@ -88,6 +90,7 @@
>   #define TEMP_ADCVALIDMASK_VALID_HIGH		BIT(5)
>   #define TEMP_ADCVALIDMASK_VALID_POS(bit)	(bit)
>
> +/* MT8173 thermal sensors */
>   #define MT8173_TS1	0
>   #define MT8173_TS2	1
>   #define MT8173_TS3	2
> @@ -97,35 +100,62 @@
>   /* AUXADC channel 11 is used for the temperature sensors */
>   #define MT8173_TEMP_AUXADC_CHANNEL	11
>
> -/* The total number of temperature sensors in the MT8173 */
> -#define MT8173_NUM_SENSORS		5
> -
> -/* The number of banks in the MT8173 */
> -#define MT8173_NUM_ZONES		4
> -
> -/* The number of sensing points per bank */
> -#define MT8173_NUM_SENSORS_PER_ZONE	4
> -
>   /* Layout of the fuses providing the calibration data */
> -#define MT8173_CALIB_BUF0_VALID		BIT(0)
> -#define MT8173_CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
> -#define MT8173_CALIB_BUF0_VTS_TS1(x)	(((x) >> 17) & 0x1ff)
> -#define MT8173_CALIB_BUF0_VTS_TS2(x)	(((x) >> 8) & 0x1ff)
> -#define MT8173_CALIB_BUF1_VTS_TS3(x)	(((x) >> 0) & 0x1ff)
> -#define MT8173_CALIB_BUF2_VTS_TS4(x)	(((x) >> 23) & 0x1ff)
> -#define MT8173_CALIB_BUF2_VTS_TSABB(x)	(((x) >> 14) & 0x1ff)
> -#define MT8173_CALIB_BUF0_DEGC_CALI(x)	(((x) >> 1) & 0x3f)
> -#define MT8173_CALIB_BUF0_O_SLOPE(x)	(((x) >> 26) & 0x3f)
> +#define CALIB_BUF0_VALID		BIT(0)
> +#define CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
> +#define CALIB_BUF0_VTS_TS1(x)	(((x) >> 17) & 0x1ff)
> +#define CALIB_BUF0_VTS_TS2(x)	(((x) >> 8) & 0x1ff)
> +#define CALIB_BUF1_VTS_TS3(x)	(((x) >> 0) & 0x1ff)
> +#define CALIB_BUF2_VTS_TS4(x)	(((x) >> 23) & 0x1ff)
> +#define CALIB_BUF2_VTS_TS5(x)	(((x) >> 14) & 0x1ff)
> +#define CALIB_BUF0_DEGC_CALI(x)	(((x) >> 1) & 0x3f)
> +#define CALIB_BUF0_O_SLOPE(x)	(((x) >> 26) & 0x3f)
> +

IMHO the above changes from defining CALIB_BUF1_ADC_GE(x) to 
CALIB_BUF0_O_SLOPE(x) can be avoided. We are just renaming the same 
defines to a generic name. Instead the macro starting with MT8173 can 
only be used wherever needed commonly both by 8173 instance and for
2701 instance.

> +#define NVMEM_TS1	0
> +#define NVMEM_TS2	1
> +#define NVMEM_TS3	2
> +#define NVMEM_TS4	3
> +#define NVMEM_TS5	4
> +
> +/* MT2701 thermal sensors */
> +#define MT2701_TS1	0
> +#define MT2701_TS2	1
> +#define MT2701_TSABB	2
> +
> +/* AUXADC channel 11 is used for the temperature sensors */
> +#define MT2701_TEMP_AUXADC_CHANNEL	11
>
>   #define THERMAL_NAME    "mtk-thermal"
>
> +/* Maximum support banks */
> +#define MAX_NUM_BANK		5

Why is this 5?
Commit message states: MT8173 has four banks and five sensors, and 
MT2701 has only one bank and three sensors. Am i missing something here?

> +
>   struct mtk_thermal;
>
> +struct thermal_bank_cfg {
> +	unsigned int num_sensors;
> +	unsigned int sensors[MAX_NUM_BANK];
> +};
> +
>   struct mtk_thermal_bank {
>   	struct mtk_thermal *mt;
>   	int id;
>   };
>
> +struct mtk_thermal_sense_point {
> +	int msr;
> +	int adcpnp;
> +};
> +
> +struct mtk_thermal_data {
> +	struct thermal_bank_cfg bank_data[MAX_NUM_BANK];

So for MT8173 we are allocating one bank extra and for MT2701 we are 
allocating 4 banks extra right? Why not do something like this:

struct thermal_bank *banks_data
Assign the array based on the SoC type?

> +	struct mtk_thermal_sense_point sensing_points[MAX_NUM_BANK];
> +	int sensor_mux_values[MAX_NUM_BANK];
> +	s32 num_banks;
> +	s32 num_sensors;
> +	s32 auxadc_channel;
> +};
> +
>   struct mtk_thermal {
>   	struct device *dev;
>   	void __iomem *thermal_base;
> @@ -133,27 +163,20 @@ struct mtk_thermal {
>   	struct clk *clk_peri_therm;
>   	struct clk *clk_auxadc;
>
> -	struct mtk_thermal_bank banks[MT8173_NUM_ZONES];
> -
> +	struct mtk_thermal_bank banks[MAX_NUM_BANK];

Here again some extra memory allocation.

Why not keep a pointer which points to the desired array?

> +	const struct mtk_thermal_data *conf;
>   	/* lock: for getting and putting banks */
>   	struct mutex lock;
> +	struct thermal_zone_device *tzd;
>
>   	/* Calibration values */
>   	s32 adc_ge;
>   	s32 degc_cali;
>   	s32 o_slope;
> -	s32 vts[MT8173_NUM_SENSORS];
> -
> -};
> -
> -struct mtk_thermal_bank_cfg {
> -	unsigned int num_sensors;
> -	unsigned int sensors[MT8173_NUM_SENSORS_PER_ZONE];
> +	s32 vts[MAX_NUM_BANK];
>   };
>
> -static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
> -
> -/*
> +/**
>    * The MT8173 thermal controller has four banks. Each bank can read up to
>    * four temperature sensors simultaneously. The MT8173 has a total of 5
>    * temperature sensors. We use each bank to measure a certain area of the
> @@ -166,42 +189,76 @@ static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
>    * data, and this indeed needs the temperatures of the individual banks
>    * for making better decisions.
>    */
> -static const struct mtk_thermal_bank_cfg bank_data[] = {
> -	{
> -		.num_sensors = 2,
> -		.sensors = { MT8173_TS2, MT8173_TS3 },
> -	}, {
> -		.num_sensors = 2,
> -		.sensors = { MT8173_TS2, MT8173_TS4 },
> -	}, {
> -		.num_sensors = 3,
> -		.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
> -	}, {
> -		.num_sensors = 1,
> -		.sensors = { MT8173_TS2 },
> +static const struct mtk_thermal_data mt8173_thermal_data = {
> +	.auxadc_channel = MT8173_TEMP_AUXADC_CHANNEL,
> +	.num_banks = 4,
> +	.num_sensors = 5,
> +	.bank_data = {
> +		{
> +			.num_sensors = 2,
> +			.sensors = { MT8173_TS2, MT8173_TS3 },
> +		}, {
> +			.num_sensors = 2,
> +			.sensors = { MT8173_TS2, MT8173_TS4 },
> +		}, {
> +			.num_sensors = 3,
> +			.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
> +		}, {
> +			.num_sensors = 1,
> +			.sensors = { MT8173_TS2 },
> +		},
>   	},
> +	.sensing_points = {
> +		{
> +			.msr = TEMP_MSR0,
> +			.adcpnp = TEMP_ADCPNP0,
> +		}, {
> +			.msr = TEMP_MSR1,
> +			.adcpnp = TEMP_ADCPNP1,
> +		}, {
> +			.msr = TEMP_MSR2,
> +			.adcpnp = TEMP_ADCPNP2,
> +		}, {
> +			.msr = TEMP_MSR3,
> +			.adcpnp = TEMP_ADCPNP3,
> +		},
> +	},
> +	.sensor_mux_values = { 0, 1, 2, 3, 16 },
>   };
>
> -struct mtk_thermal_sense_point {
> -	int msr;
> -	int adcpnp;
> -};
> -
> -static const struct mtk_thermal_sense_point
> -		sensing_points[MT8173_NUM_SENSORS_PER_ZONE] = {
> -	{
> -		.msr = TEMP_MSR0,
> -		.adcpnp = TEMP_ADCPNP0,
> -	}, {
> -		.msr = TEMP_MSR1,
> -		.adcpnp = TEMP_ADCPNP1,
> -	}, {
> -		.msr = TEMP_MSR2,
> -		.adcpnp = TEMP_ADCPNP2,
> -	}, {
> -		.msr = TEMP_MSR3,
> -		.adcpnp = TEMP_ADCPNP3,
> +/**
> + * The MT2701 thermal controller has one bank, which can read up to
> + * three temperature sensors simultaneously. The MT2701 has a total of 3
> + * temperature sensors.
> + *
> + * The thermal core only gets the maximum temperature of this one bank,
> + * so the bank concept wouldn't be necessary here. However, the SVS (Smart
> + * Voltage Scaling) unit makes its decisions based on the same bank
> + * data.
> + */
> +static const struct mtk_thermal_data mt2701_thermal_data = {
> +	.auxadc_channel = MT2701_TEMP_AUXADC_CHANNEL,
> +	.num_banks = 1,
> +	.num_sensors = 3,
> +	.bank_data = {
> +		{
> +			.num_sensors = 3,
> +			.sensors = { MT2701_TS1, MT2701_TS2, MT2701_TSABB },
> +		},
>   	},
> +	.sensing_points = {
> +		{
> +			.msr = TEMP_MSR0,
> +			.adcpnp = TEMP_ADCPNP0,
> +		}, {
> +			.msr = TEMP_MSR1,
> +			.adcpnp = TEMP_ADCPNP1,
> +		}, {
> +			.msr = TEMP_MSR2,
> +			.adcpnp = TEMP_ADCPNP2,
> +		},
> +	},
> +	.sensor_mux_values = { 0, 1, 16},
>   };
>
>   /**
> @@ -270,13 +327,15 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
>   static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
>   {
>   	struct mtk_thermal *mt = bank->mt;
> +	const struct mtk_thermal_data *conf = mt->conf;
>   	int i, temp = INT_MIN, max = INT_MIN;
>   	u32 raw;
>
> -	for (i = 0; i < bank_data[bank->id].num_sensors; i++) {
> -		raw = readl(mt->thermal_base + sensing_points[i].msr);
> +	for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
> +		raw = readl(mt->thermal_base + conf->sensing_points[i].msr);
>
> -		temp = raw_to_mcelsius(mt, bank_data[bank->id].sensors[i], raw);
> +		temp = raw_to_mcelsius(mt, conf->bank_data[bank->id].sensors[i],
> +				       raw);
>
>   		/*
>   		 * The first read of a sensor often contains very high bogus
> @@ -299,7 +358,7 @@ static int mtk_read_temp(void *data, int *temperature)
>   	int i;
>   	int tempmax = INT_MIN;
>
> -	for (i = 0; i < MT8173_NUM_ZONES; i++) {
> +	for (i = 0; i < mt->conf->num_banks; i++) {
>   		struct mtk_thermal_bank *bank = &mt->banks[i];
>
>   		mtk_thermal_get_bank(bank);
> @@ -322,7 +381,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
>   				  u32 apmixed_phys_base, u32 auxadc_phys_base)
>   {
>   	struct mtk_thermal_bank *bank = &mt->banks[num];
> -	const struct mtk_thermal_bank_cfg *cfg = &bank_data[num];
> +	const struct mtk_thermal_data *conf = mt->conf;
>   	int i;
>
>   	bank->id = num;
> @@ -368,7 +427,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
>   	 * this value will be stored to TEMP_PNPMUXADDR (TEMP_SPARE0)
>   	 * automatically by hw
>   	 */
> -	writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCMUX);
> +	writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCMUX);
>
>   	/* AHB address for auxadc mux selection */
>   	writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
> @@ -379,18 +438,18 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
>   	       mt->thermal_base + TEMP_PNPMUXADDR);
>
>   	/* AHB value for auxadc enable */
> -	writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCEN);
> +	writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCEN);
>
>   	/* AHB address for auxadc enable (channel 0 immediate mode selected) */
>   	writel(auxadc_phys_base + AUXADC_CON1_SET_V,
>   	       mt->thermal_base + TEMP_ADCENADDR);
>
>   	/* AHB address for auxadc valid bit */
> -	writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
> +	writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
>   	       mt->thermal_base + TEMP_ADCVALIDADDR);
>
>   	/* AHB address for auxadc voltage output */
> -	writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
> +	writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
>   	       mt->thermal_base + TEMP_ADCVOLTADDR);
>
>   	/* read valid & voltage are at the same register */
> @@ -407,11 +466,12 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
>   	writel(TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
>   	       mt->thermal_base + TEMP_ADCWRITECTRL);
>
> -	for (i = 0; i < cfg->num_sensors; i++)
> -		writel(sensor_mux_values[cfg->sensors[i]],
> -		       mt->thermal_base + sensing_points[i].adcpnp);
> +	for (i = 0; i < conf->bank_data[num].num_sensors; i++)
> +		writel(conf->sensor_mux_values[conf->bank_data[num].sensors[i]],
> +		       mt->thermal_base + conf->sensing_points[i].adcpnp);
>
> -	writel((1 << cfg->num_sensors) - 1, mt->thermal_base + TEMP_MONCTL0);
> +	writel((1 << conf->bank_data[num].num_sensors) - 1,
> +	       mt->thermal_base + TEMP_MONCTL0);
>
>   	writel(TEMP_ADCWRITECTRL_ADC_PNP_WRITE |
>   	       TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
> @@ -442,7 +502,7 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
>
>   	/* Start with default values */
>   	mt->adc_ge = 512;
> -	for (i = 0; i < MT8173_NUM_SENSORS; i++)
> +	for (i = 0; i < mt->conf->num_sensors; i++)
>   		mt->vts[i] = 260;
>   	mt->degc_cali = 40;
>   	mt->o_slope = 0;
> @@ -467,15 +527,15 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
>   		goto out;
>   	}
>
> -	if (buf[0] & MT8173_CALIB_BUF0_VALID) {
> -		mt->adc_ge = MT8173_CALIB_BUF1_ADC_GE(buf[1]);
> -		mt->vts[MT8173_TS1] = MT8173_CALIB_BUF0_VTS_TS1(buf[0]);
> -		mt->vts[MT8173_TS2] = MT8173_CALIB_BUF0_VTS_TS2(buf[0]);
> -		mt->vts[MT8173_TS3] = MT8173_CALIB_BUF1_VTS_TS3(buf[1]);
> -		mt->vts[MT8173_TS4] = MT8173_CALIB_BUF2_VTS_TS4(buf[2]);
> -		mt->vts[MT8173_TSABB] = MT8173_CALIB_BUF2_VTS_TSABB(buf[2]);
> -		mt->degc_cali = MT8173_CALIB_BUF0_DEGC_CALI(buf[0]);
> -		mt->o_slope = MT8173_CALIB_BUF0_O_SLOPE(buf[0]);
> +	if (buf[0] & CALIB_BUF0_VALID) {
> +		mt->adc_ge = CALIB_BUF1_ADC_GE(buf[1]);
> +		mt->vts[NVMEM_TS1] = CALIB_BUF0_VTS_TS1(buf[0]);
> +		mt->vts[NVMEM_TS2] = CALIB_BUF0_VTS_TS2(buf[0]);
> +		mt->vts[NVMEM_TS3] = CALIB_BUF1_VTS_TS3(buf[1]);
> +		mt->vts[NVMEM_TS4] = CALIB_BUF2_VTS_TS4(buf[1]);
> +		mt->vts[NVMEM_TS5] = CALIB_BUF2_VTS_TS5(buf[2]);
> +		mt->degc_cali = CALIB_BUF0_DEGC_CALI(buf[0]);
> +		mt->o_slope = CALIB_BUF0_O_SLOPE(buf[0]);

I guess even the above code changes can be avoided if we just retain 
macros starting with MT8173?

Best Regards,
Keerthy

>   	} else {
>   		dev_info(dev, "Device not calibrated, using default calibration values\n");
>   	}
> @@ -486,18 +546,36 @@ out:
>   	return ret;
>   }
>
> +static const struct of_device_id mtk_thermal_of_match[] = {
> +	{
> +		.compatible = "mediatek,mt8173-thermal",
> +		.data = (void *)&mt8173_thermal_data,
> +	},
> +	{
> +		.compatible = "mediatek,mt2701-thermal",
> +		.data = (void *)&mt2701_thermal_data,
> +	}, {
> +	},
> +};
> +MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);
> +
>   static int mtk_thermal_probe(struct platform_device *pdev)
>   {
>   	int ret, i;
>   	struct device_node *auxadc, *apmixedsys, *np = pdev->dev.of_node;
>   	struct mtk_thermal *mt;
>   	struct resource *res;
> +	const struct of_device_id *of_id;
>   	u64 auxadc_phys_base, apmixed_phys_base;
>
>   	mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
>   	if (!mt)
>   		return -ENOMEM;
>
> +	of_id = of_match_device(mtk_thermal_of_match, &pdev->dev);
> +	if (of_id)
> +		mt->conf = (const struct mtk_thermal_data *)of_id->data;
> +
>   	mt->clk_peri_therm = devm_clk_get(&pdev->dev, "therm");
>   	if (IS_ERR(mt->clk_peri_therm))
>   		return PTR_ERR(mt->clk_peri_therm);
> @@ -565,7 +643,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
>   		goto err_disable_clk_auxadc;
>   	}
>
> -	for (i = 0; i < MT8173_NUM_ZONES; i++)
> +	for (i = 0; i < mt->conf->num_banks; i++)
>   		mtk_thermal_init_bank(mt, i, apmixed_phys_base,
>   				      auxadc_phys_base);
>
> @@ -592,13 +670,6 @@ static int mtk_thermal_remove(struct platform_device *pdev)
>   	return 0;
>   }
>
> -static const struct of_device_id mtk_thermal_of_match[] = {
> -	{
> -		.compatible = "mediatek,mt8173-thermal",
> -	}, {
> -	},
> -};
> -
>   static struct platform_driver mtk_thermal_driver = {
>   	.probe = mtk_thermal_probe,
>   	.remove = mtk_thermal_remove,
> @@ -610,6 +681,7 @@ static struct platform_driver mtk_thermal_driver = {
>
>   module_platform_driver(mtk_thermal_driver);
>
> +MODULE_AUTHOR("Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>");
>   MODULE_AUTHOR("Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>");
>   MODULE_AUTHOR("Hanyi Wu <hanyi.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>");
>   MODULE_DESCRIPTION("Mediatek thermal driver");
>

Re: [PATCH 2/3] thermal: Add Mediatek thermal driver for mt2701.

[dawei chien]

Dear Keerthy,

On Thu, 2016-07-07 at 17:24 +0530, Keerthy wrote:
> Hi Dawei Chien,
> 
> 
> On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
> > This patch adds support for mt2701 chip to mtk_thermal.c,
> > and integrate both mt8173 and mt2701 on the same driver.
> > MT8173 has four banks and five sensors, and MT2701 has
> > only one bank and three sensors.
> >
> > Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
> > ---
> >   drivers/thermal/mtk_thermal.c |  258 ++++++++++++++++++++++++++---------------
> >   1 file changed, 165 insertions(+), 93 deletions(-)
> >
> > diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
> > index 262ab0a..860f2e2 100644
> > --- a/drivers/thermal/mtk_thermal.c
> > +++ b/drivers/thermal/mtk_thermal.c
> > @@ -2,6 +2,7 @@
> >    * Copyright (c) 2015 MediaTek Inc.
> >    * Author: Hanyi Wu <hanyi.wu@mediatek.com>
> >    *         Sascha Hauer <s.hauer@pengutronix.de>
> > + *         Dawei Chien <dawei.chien@mediatek.com>
> >    *
> >    * This program is free software; you can redistribute it and/or modify
> >    * it under the terms of the GNU General Public License version 2 as
> > @@ -21,6 +22,7 @@
> >   #include <linux/nvmem-consumer.h>
> >   #include <linux/of.h>
> >   #include <linux/of_address.h>
> > +#include <linux/of_device.h>
> >   #include <linux/platform_device.h>
> >   #include <linux/slab.h>
> >   #include <linux/io.h>
> > @@ -88,6 +90,7 @@
> >   #define TEMP_ADCVALIDMASK_VALID_HIGH		BIT(5)
> >   #define TEMP_ADCVALIDMASK_VALID_POS(bit)	(bit)
> >
> > +/* MT8173 thermal sensors */
> >   #define MT8173_TS1	0
> >   #define MT8173_TS2	1
> >   #define MT8173_TS3	2
> > @@ -97,35 +100,62 @@
> >   /* AUXADC channel 11 is used for the temperature sensors */
> >   #define MT8173_TEMP_AUXADC_CHANNEL	11
> >
> > -/* The total number of temperature sensors in the MT8173 */
> > -#define MT8173_NUM_SENSORS		5
> > -
> > -/* The number of banks in the MT8173 */
> > -#define MT8173_NUM_ZONES		4
> > -
> > -/* The number of sensing points per bank */
> > -#define MT8173_NUM_SENSORS_PER_ZONE	4
> > -
> >   /* Layout of the fuses providing the calibration data */
> > -#define MT8173_CALIB_BUF0_VALID		BIT(0)
> > -#define MT8173_CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
> > -#define MT8173_CALIB_BUF0_VTS_TS1(x)	(((x) >> 17) & 0x1ff)
> > -#define MT8173_CALIB_BUF0_VTS_TS2(x)	(((x) >> 8) & 0x1ff)
> > -#define MT8173_CALIB_BUF1_VTS_TS3(x)	(((x) >> 0) & 0x1ff)
> > -#define MT8173_CALIB_BUF2_VTS_TS4(x)	(((x) >> 23) & 0x1ff)
> > -#define MT8173_CALIB_BUF2_VTS_TSABB(x)	(((x) >> 14) & 0x1ff)
> > -#define MT8173_CALIB_BUF0_DEGC_CALI(x)	(((x) >> 1) & 0x3f)
> > -#define MT8173_CALIB_BUF0_O_SLOPE(x)	(((x) >> 26) & 0x3f)
> > +#define CALIB_BUF0_VALID		BIT(0)
> > +#define CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
> > +#define CALIB_BUF0_VTS_TS1(x)	(((x) >> 17) & 0x1ff)
> > +#define CALIB_BUF0_VTS_TS2(x)	(((x) >> 8) & 0x1ff)
> > +#define CALIB_BUF1_VTS_TS3(x)	(((x) >> 0) & 0x1ff)
> > +#define CALIB_BUF2_VTS_TS4(x)	(((x) >> 23) & 0x1ff)
> > +#define CALIB_BUF2_VTS_TS5(x)	(((x) >> 14) & 0x1ff)
> > +#define CALIB_BUF0_DEGC_CALI(x)	(((x) >> 1) & 0x3f)
> > +#define CALIB_BUF0_O_SLOPE(x)	(((x) >> 26) & 0x3f)
> > +
> 
> IMHO the above changes from defining CALIB_BUF1_ADC_GE(x) to 
> CALIB_BUF0_O_SLOPE(x) can be avoided. We are just renaming the same 
> defines to a generic name. Instead the macro starting with MT8173 can 
> only be used wherever needed commonly both by 8173 instance and for
> 2701 instance.
> 

I would have a try to keep MT8173 original one and add some comment for
the macro starting on next version.

> > +#define NVMEM_TS1	0
> > +#define NVMEM_TS2	1
> > +#define NVMEM_TS3	2
> > +#define NVMEM_TS4	3
> > +#define NVMEM_TS5	4
> > +

Does these need to keep the old one
MT8173_TS1/MT8173_TS2/MT8173_TS3/MT8173_TS4/MT8173_TSABB


> > +/* MT2701 thermal sensors */
> > +#define MT2701_TS1	0
> > +#define MT2701_TS2	1
> > +#define MT2701_TSABB	2
> > +
> > +/* AUXADC channel 11 is used for the temperature sensors */
> > +#define MT2701_TEMP_AUXADC_CHANNEL	11
> >
> >   #define THERMAL_NAME    "mtk-thermal"
> >
> > +/* Maximum support banks */
> > +#define MAX_NUM_BANK		5
> 
> Why is this 5?
> Commit message states: MT8173 has four banks and five sensors, and 
> MT2701 has only one bank and three sensors. Am i missing something here?
> 

This is my miss, it should be 4, but it line might remove since I would
depend on SoC type to assign array for next version.

> > +
> >   struct mtk_thermal;
> >
> > +struct thermal_bank_cfg {
> > +	unsigned int num_sensors;
> > +	unsigned int sensors[MAX_NUM_BANK];
> > +};
> > +
> >   struct mtk_thermal_bank {
> >   	struct mtk_thermal *mt;
> >   	int id;
> >   };
> >
> > +struct mtk_thermal_sense_point {
> > +	int msr;
> > +	int adcpnp;
> > +};
> > +
> > +struct mtk_thermal_data {
> > +	struct thermal_bank_cfg bank_data[MAX_NUM_BANK];
> 
> So for MT8173 we are allocating one bank extra and for MT2701 we are 
> allocating 4 banks extra right? Why not do something like this:
> 
> struct thermal_bank *banks_data
> Assign the array based on the SoC type?
> 

Yes, I agree with you, I would update it on next version.

> > +	struct mtk_thermal_sense_point sensing_points[MAX_NUM_BANK];
> > +	int sensor_mux_values[MAX_NUM_BANK];
> > +	s32 num_banks;
> > +	s32 num_sensors;
> > +	s32 auxadc_channel;
> > +};
> > +
> >   struct mtk_thermal {
> >   	struct device *dev;
> >   	void __iomem *thermal_base;
> > @@ -133,27 +163,20 @@ struct mtk_thermal {
> >   	struct clk *clk_peri_therm;
> >   	struct clk *clk_auxadc;
> >
> > -	struct mtk_thermal_bank banks[MT8173_NUM_ZONES];
> > -
> > +	struct mtk_thermal_bank banks[MAX_NUM_BANK];
> 
> Here again some extra memory allocation.
> 
> Why not keep a pointer which points to the desired array?
> 
> > +	const struct mtk_thermal_data *conf;
> >   	/* lock: for getting and putting banks */
> >   	struct mutex lock;
> > +	struct thermal_zone_device *tzd;
> >
> >   	/* Calibration values */
> >   	s32 adc_ge;
> >   	s32 degc_cali;
> >   	s32 o_slope;
> > -	s32 vts[MT8173_NUM_SENSORS];
> > -
> > -};
> > -
> > -struct mtk_thermal_bank_cfg {
> > -	unsigned int num_sensors;
> > -	unsigned int sensors[MT8173_NUM_SENSORS_PER_ZONE];
> > +	s32 vts[MAX_NUM_BANK];
> >   };
> >
> > -static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
> > -
> > -/*
> > +/**
> >    * The MT8173 thermal controller has four banks. Each bank can read up to
> >    * four temperature sensors simultaneously. The MT8173 has a total of 5
> >    * temperature sensors. We use each bank to measure a certain area of the
> > @@ -166,42 +189,76 @@ static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
> >    * data, and this indeed needs the temperatures of the individual banks
> >    * for making better decisions.
> >    */
> > -static const struct mtk_thermal_bank_cfg bank_data[] = {
> > -	{
> > -		.num_sensors = 2,
> > -		.sensors = { MT8173_TS2, MT8173_TS3 },
> > -	}, {
> > -		.num_sensors = 2,
> > -		.sensors = { MT8173_TS2, MT8173_TS4 },
> > -	}, {
> > -		.num_sensors = 3,
> > -		.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
> > -	}, {
> > -		.num_sensors = 1,
> > -		.sensors = { MT8173_TS2 },
> > +static const struct mtk_thermal_data mt8173_thermal_data = {
> > +	.auxadc_channel = MT8173_TEMP_AUXADC_CHANNEL,
> > +	.num_banks = 4,
> > +	.num_sensors = 5,
> > +	.bank_data = {
> > +		{
> > +			.num_sensors = 2,
> > +			.sensors = { MT8173_TS2, MT8173_TS3 },
> > +		}, {
> > +			.num_sensors = 2,
> > +			.sensors = { MT8173_TS2, MT8173_TS4 },
> > +		}, {
> > +			.num_sensors = 3,
> > +			.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
> > +		}, {
> > +			.num_sensors = 1,
> > +			.sensors = { MT8173_TS2 },
> > +		},
> >   	},
> > +	.sensing_points = {
> > +		{
> > +			.msr = TEMP_MSR0,
> > +			.adcpnp = TEMP_ADCPNP0,
> > +		}, {
> > +			.msr = TEMP_MSR1,
> > +			.adcpnp = TEMP_ADCPNP1,
> > +		}, {
> > +			.msr = TEMP_MSR2,
> > +			.adcpnp = TEMP_ADCPNP2,
> > +		}, {
> > +			.msr = TEMP_MSR3,
> > +			.adcpnp = TEMP_ADCPNP3,
> > +		},
> > +	},
> > +	.sensor_mux_values = { 0, 1, 2, 3, 16 },
> >   };
> >
> > -struct mtk_thermal_sense_point {
> > -	int msr;
> > -	int adcpnp;
> > -};
> > -
> > -static const struct mtk_thermal_sense_point
> > -		sensing_points[MT8173_NUM_SENSORS_PER_ZONE] = {
> > -	{
> > -		.msr = TEMP_MSR0,
> > -		.adcpnp = TEMP_ADCPNP0,
> > -	}, {
> > -		.msr = TEMP_MSR1,
> > -		.adcpnp = TEMP_ADCPNP1,
> > -	}, {
> > -		.msr = TEMP_MSR2,
> > -		.adcpnp = TEMP_ADCPNP2,
> > -	}, {
> > -		.msr = TEMP_MSR3,
> > -		.adcpnp = TEMP_ADCPNP3,
> > +/**
> > + * The MT2701 thermal controller has one bank, which can read up to
> > + * three temperature sensors simultaneously. The MT2701 has a total of 3
> > + * temperature sensors.
> > + *
> > + * The thermal core only gets the maximum temperature of this one bank,
> > + * so the bank concept wouldn't be necessary here. However, the SVS (Smart
> > + * Voltage Scaling) unit makes its decisions based on the same bank
> > + * data.
> > + */
> > +static const struct mtk_thermal_data mt2701_thermal_data = {
> > +	.auxadc_channel = MT2701_TEMP_AUXADC_CHANNEL,
> > +	.num_banks = 1,
> > +	.num_sensors = 3,
> > +	.bank_data = {
> > +		{
> > +			.num_sensors = 3,
> > +			.sensors = { MT2701_TS1, MT2701_TS2, MT2701_TSABB },
> > +		},
> >   	},
> > +	.sensing_points = {
> > +		{
> > +			.msr = TEMP_MSR0,
> > +			.adcpnp = TEMP_ADCPNP0,
> > +		}, {
> > +			.msr = TEMP_MSR1,
> > +			.adcpnp = TEMP_ADCPNP1,
> > +		}, {
> > +			.msr = TEMP_MSR2,
> > +			.adcpnp = TEMP_ADCPNP2,
> > +		},
> > +	},
> > +	.sensor_mux_values = { 0, 1, 16},
> >   };
> >
> >   /**
> > @@ -270,13 +327,15 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
> >   static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
> >   {
> >   	struct mtk_thermal *mt = bank->mt;
> > +	const struct mtk_thermal_data *conf = mt->conf;
> >   	int i, temp = INT_MIN, max = INT_MIN;
> >   	u32 raw;
> >
> > -	for (i = 0; i < bank_data[bank->id].num_sensors; i++) {
> > -		raw = readl(mt->thermal_base + sensing_points[i].msr);
> > +	for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
> > +		raw = readl(mt->thermal_base + conf->sensing_points[i].msr);
> >
> > -		temp = raw_to_mcelsius(mt, bank_data[bank->id].sensors[i], raw);
> > +		temp = raw_to_mcelsius(mt, conf->bank_data[bank->id].sensors[i],
> > +				       raw);
> >
> >   		/*
> >   		 * The first read of a sensor often contains very high bogus
> > @@ -299,7 +358,7 @@ static int mtk_read_temp(void *data, int *temperature)
> >   	int i;
> >   	int tempmax = INT_MIN;
> >
> > -	for (i = 0; i < MT8173_NUM_ZONES; i++) {
> > +	for (i = 0; i < mt->conf->num_banks; i++) {
> >   		struct mtk_thermal_bank *bank = &mt->banks[i];
> >
> >   		mtk_thermal_get_bank(bank);
> > @@ -322,7 +381,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
> >   				  u32 apmixed_phys_base, u32 auxadc_phys_base)
> >   {
> >   	struct mtk_thermal_bank *bank = &mt->banks[num];
> > -	const struct mtk_thermal_bank_cfg *cfg = &bank_data[num];
> > +	const struct mtk_thermal_data *conf = mt->conf;
> >   	int i;
> >
> >   	bank->id = num;
> > @@ -368,7 +427,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
> >   	 * this value will be stored to TEMP_PNPMUXADDR (TEMP_SPARE0)
> >   	 * automatically by hw
> >   	 */
> > -	writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCMUX);
> > +	writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCMUX);
> >
> >   	/* AHB address for auxadc mux selection */
> >   	writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
> > @@ -379,18 +438,18 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
> >   	       mt->thermal_base + TEMP_PNPMUXADDR);
> >
> >   	/* AHB value for auxadc enable */
> > -	writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCEN);
> > +	writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCEN);
> >
> >   	/* AHB address for auxadc enable (channel 0 immediate mode selected) */
> >   	writel(auxadc_phys_base + AUXADC_CON1_SET_V,
> >   	       mt->thermal_base + TEMP_ADCENADDR);
> >
> >   	/* AHB address for auxadc valid bit */
> > -	writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
> > +	writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
> >   	       mt->thermal_base + TEMP_ADCVALIDADDR);
> >
> >   	/* AHB address for auxadc voltage output */
> > -	writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
> > +	writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
> >   	       mt->thermal_base + TEMP_ADCVOLTADDR);
> >
> >   	/* read valid & voltage are at the same register */
> > @@ -407,11 +466,12 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
> >   	writel(TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
> >   	       mt->thermal_base + TEMP_ADCWRITECTRL);
> >
> > -	for (i = 0; i < cfg->num_sensors; i++)
> > -		writel(sensor_mux_values[cfg->sensors[i]],
> > -		       mt->thermal_base + sensing_points[i].adcpnp);
> > +	for (i = 0; i < conf->bank_data[num].num_sensors; i++)
> > +		writel(conf->sensor_mux_values[conf->bank_data[num].sensors[i]],
> > +		       mt->thermal_base + conf->sensing_points[i].adcpnp);
> >
> > -	writel((1 << cfg->num_sensors) - 1, mt->thermal_base + TEMP_MONCTL0);
> > +	writel((1 << conf->bank_data[num].num_sensors) - 1,
> > +	       mt->thermal_base + TEMP_MONCTL0);
> >
> >   	writel(TEMP_ADCWRITECTRL_ADC_PNP_WRITE |
> >   	       TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
> > @@ -442,7 +502,7 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
> >
> >   	/* Start with default values */
> >   	mt->adc_ge = 512;
> > -	for (i = 0; i < MT8173_NUM_SENSORS; i++)
> > +	for (i = 0; i < mt->conf->num_sensors; i++)
> >   		mt->vts[i] = 260;
> >   	mt->degc_cali = 40;
> >   	mt->o_slope = 0;
> > @@ -467,15 +527,15 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
> >   		goto out;
> >   	}
> >
> > -	if (buf[0] & MT8173_CALIB_BUF0_VALID) {
> > -		mt->adc_ge = MT8173_CALIB_BUF1_ADC_GE(buf[1]);
> > -		mt->vts[MT8173_TS1] = MT8173_CALIB_BUF0_VTS_TS1(buf[0]);
> > -		mt->vts[MT8173_TS2] = MT8173_CALIB_BUF0_VTS_TS2(buf[0]);
> > -		mt->vts[MT8173_TS3] = MT8173_CALIB_BUF1_VTS_TS3(buf[1]);
> > -		mt->vts[MT8173_TS4] = MT8173_CALIB_BUF2_VTS_TS4(buf[2]);
> > -		mt->vts[MT8173_TSABB] = MT8173_CALIB_BUF2_VTS_TSABB(buf[2]);
> > -		mt->degc_cali = MT8173_CALIB_BUF0_DEGC_CALI(buf[0]);
> > -		mt->o_slope = MT8173_CALIB_BUF0_O_SLOPE(buf[0]);
> > +	if (buf[0] & CALIB_BUF0_VALID) {
> > +		mt->adc_ge = CALIB_BUF1_ADC_GE(buf[1]);
> > +		mt->vts[NVMEM_TS1] = CALIB_BUF0_VTS_TS1(buf[0]);
> > +		mt->vts[NVMEM_TS2] = CALIB_BUF0_VTS_TS2(buf[0]);
> > +		mt->vts[NVMEM_TS3] = CALIB_BUF1_VTS_TS3(buf[1]);
> > +		mt->vts[NVMEM_TS4] = CALIB_BUF2_VTS_TS4(buf[1]);
> > +		mt->vts[NVMEM_TS5] = CALIB_BUF2_VTS_TS5(buf[2]);
> > +		mt->degc_cali = CALIB_BUF0_DEGC_CALI(buf[0]);
> > +		mt->o_slope = CALIB_BUF0_O_SLOPE(buf[0]);
> 
> I guess even the above code changes can be avoided if we just retain 
> macros starting with MT8173?
> 
> Best Regards,
> Keerthy
> 

Yes, I think so, only different on the array size for vts since sensors
number different between MT8173 & MT2701, I might separate it by SoC
type on next version.

BR,
Dawei

> >   	} else {
> >   		dev_info(dev, "Device not calibrated, using default calibration values\n");
> >   	}
> > @@ -486,18 +546,36 @@ out:
> >   	return ret;
> >   }
> >
> > +static const struct of_device_id mtk_thermal_of_match[] = {
> > +	{
> > +		.compatible = "mediatek,mt8173-thermal",
> > +		.data = (void *)&mt8173_thermal_data,
> > +	},
> > +	{
> > +		.compatible = "mediatek,mt2701-thermal",
> > +		.data = (void *)&mt2701_thermal_data,
> > +	}, {
> > +	},
> > +};
> > +MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);
> > +
> >   static int mtk_thermal_probe(struct platform_device *pdev)
> >   {
> >   	int ret, i;
> >   	struct device_node *auxadc, *apmixedsys, *np = pdev->dev.of_node;
> >   	struct mtk_thermal *mt;
> >   	struct resource *res;
> > +	const struct of_device_id *of_id;
> >   	u64 auxadc_phys_base, apmixed_phys_base;
> >
> >   	mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
> >   	if (!mt)
> >   		return -ENOMEM;
> >
> > +	of_id = of_match_device(mtk_thermal_of_match, &pdev->dev);
> > +	if (of_id)
> > +		mt->conf = (const struct mtk_thermal_data *)of_id->data;
> > +
> >   	mt->clk_peri_therm = devm_clk_get(&pdev->dev, "therm");
> >   	if (IS_ERR(mt->clk_peri_therm))
> >   		return PTR_ERR(mt->clk_peri_therm);
> > @@ -565,7 +643,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
> >   		goto err_disable_clk_auxadc;
> >   	}
> >
> > -	for (i = 0; i < MT8173_NUM_ZONES; i++)
> > +	for (i = 0; i < mt->conf->num_banks; i++)
> >   		mtk_thermal_init_bank(mt, i, apmixed_phys_base,
> >   				      auxadc_phys_base);
> >
> > @@ -592,13 +670,6 @@ static int mtk_thermal_remove(struct platform_device *pdev)
> >   	return 0;
> >   }
> >
> > -static const struct of_device_id mtk_thermal_of_match[] = {
> > -	{
> > -		.compatible = "mediatek,mt8173-thermal",
> > -	}, {
> > -	},
> > -};
> > -
> >   static struct platform_driver mtk_thermal_driver = {
> >   	.probe = mtk_thermal_probe,
> >   	.remove = mtk_thermal_remove,
> > @@ -610,6 +681,7 @@ static struct platform_driver mtk_thermal_driver = {
> >
> >   module_platform_driver(mtk_thermal_driver);
> >
> > +MODULE_AUTHOR("Dawei Chien <dawei.chien@mediatek.com>");
> >   MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
> >   MODULE_AUTHOR("Hanyi Wu <hanyi.wu@mediatek.com>");
> >   MODULE_DESCRIPTION("Mediatek thermal driver");
> >

Re: [PATCH 2/3] thermal: Add Mediatek thermal driver for mt2701.

[dawei chien]

Dear Keerthy,

On Mon, 2016-07-11 at 16:56 +0800, dawei chien wrote:
> Dear Keerthy,
> 
> On Thu, 2016-07-07 at 17:24 +0530, Keerthy wrote:
> > Hi Dawei Chien,
> > 
> > 
> > On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
> > > This patch adds support for mt2701 chip to mtk_thermal.c,
> > > and integrate both mt8173 and mt2701 on the same driver.
> > > MT8173 has four banks and five sensors, and MT2701 has
> > > only one bank and three sensors.
> > >
> > > Signed-off-by: Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> > > ---
> > >   drivers/thermal/mtk_thermal.c |  258 ++++++++++++++++++++++++++---------------
> > >   1 file changed, 165 insertions(+), 93 deletions(-)
> > >
> > > diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
> > > index 262ab0a..860f2e2 100644
> > > --- a/drivers/thermal/mtk_thermal.c
> > > +++ b/drivers/thermal/mtk_thermal.c
> > > @@ -2,6 +2,7 @@
> > >    * Copyright (c) 2015 MediaTek Inc.
> > >    * Author: Hanyi Wu <hanyi.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> > >    *         Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
> > > + *         Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> > >    *
> > >    * This program is free software; you can redistribute it and/or modify
> > >    * it under the terms of the GNU General Public License version 2 as
> > > @@ -21,6 +22,7 @@
> > >   #include <linux/nvmem-consumer.h>
> > >   #include <linux/of.h>
> > >   #include <linux/of_address.h>
> > > +#include <linux/of_device.h>
> > >   #include <linux/platform_device.h>
> > >   #include <linux/slab.h>
> > >   #include <linux/io.h>
> > > @@ -88,6 +90,7 @@
> > >   #define TEMP_ADCVALIDMASK_VALID_HIGH		BIT(5)
> > >   #define TEMP_ADCVALIDMASK_VALID_POS(bit)	(bit)
> > >
> > > +/* MT8173 thermal sensors */
> > >   #define MT8173_TS1	0
> > >   #define MT8173_TS2	1
> > >   #define MT8173_TS3	2
> > > @@ -97,35 +100,62 @@
> > >   /* AUXADC channel 11 is used for the temperature sensors */
> > >   #define MT8173_TEMP_AUXADC_CHANNEL	11
> > >
> > > -/* The total number of temperature sensors in the MT8173 */
> > > -#define MT8173_NUM_SENSORS		5
> > > -
> > > -/* The number of banks in the MT8173 */
> > > -#define MT8173_NUM_ZONES		4
> > > -
> > > -/* The number of sensing points per bank */
> > > -#define MT8173_NUM_SENSORS_PER_ZONE	4
> > > -
> > >   /* Layout of the fuses providing the calibration data */
> > > -#define MT8173_CALIB_BUF0_VALID		BIT(0)
> > > -#define MT8173_CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
> > > -#define MT8173_CALIB_BUF0_VTS_TS1(x)	(((x) >> 17) & 0x1ff)
> > > -#define MT8173_CALIB_BUF0_VTS_TS2(x)	(((x) >> 8) & 0x1ff)
> > > -#define MT8173_CALIB_BUF1_VTS_TS3(x)	(((x) >> 0) & 0x1ff)
> > > -#define MT8173_CALIB_BUF2_VTS_TS4(x)	(((x) >> 23) & 0x1ff)
> > > -#define MT8173_CALIB_BUF2_VTS_TSABB(x)	(((x) >> 14) & 0x1ff)
> > > -#define MT8173_CALIB_BUF0_DEGC_CALI(x)	(((x) >> 1) & 0x3f)
> > > -#define MT8173_CALIB_BUF0_O_SLOPE(x)	(((x) >> 26) & 0x3f)
> > > +#define CALIB_BUF0_VALID		BIT(0)
> > > +#define CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
> > > +#define CALIB_BUF0_VTS_TS1(x)	(((x) >> 17) & 0x1ff)
> > > +#define CALIB_BUF0_VTS_TS2(x)	(((x) >> 8) & 0x1ff)
> > > +#define CALIB_BUF1_VTS_TS3(x)	(((x) >> 0) & 0x1ff)
> > > +#define CALIB_BUF2_VTS_TS4(x)	(((x) >> 23) & 0x1ff)
> > > +#define CALIB_BUF2_VTS_TS5(x)	(((x) >> 14) & 0x1ff)
> > > +#define CALIB_BUF0_DEGC_CALI(x)	(((x) >> 1) & 0x3f)
> > > +#define CALIB_BUF0_O_SLOPE(x)	(((x) >> 26) & 0x3f)
> > > +
> > 
> > IMHO the above changes from defining CALIB_BUF1_ADC_GE(x) to 
> > CALIB_BUF0_O_SLOPE(x) can be avoided. We are just renaming the same 
> > defines to a generic name. Instead the macro starting with MT8173 can 
> > only be used wherever needed commonly both by 8173 instance and for
> > 2701 instance.
> > 
> 
> I would have a try to keep MT8173 original one and add some comment for
> the macro starting on next version.

Just confirm again,
we don't need change common macro name, and just need to add comment for
MT8173/MT2701, right?

> > > +#define NVMEM_TS1	0
> > > +#define NVMEM_TS2	1
> > > +#define NVMEM_TS3	2
> > > +#define NVMEM_TS4	3
> > > +#define NVMEM_TS5	4
> > > +
> 
> Does these need to keep the old one
> MT8173_TS1/MT8173_TS2/MT8173_TS3/MT8173_TS4/MT8173_TSABB

MT8173 has 5 sensors, so it need 5 address for calibration data.
And MT2701 has three sensors, so it need 3 address for that.

Do you think we need either keep the original one or rename for these.

> 
> 
> > > +/* MT2701 thermal sensors */
> > > +#define MT2701_TS1	0
> > > +#define MT2701_TS2	1
> > > +#define MT2701_TSABB	2
> > > +
> > > +/* AUXADC channel 11 is used for the temperature sensors */
> > > +#define MT2701_TEMP_AUXADC_CHANNEL	11
> > >
> > >   #define THERMAL_NAME    "mtk-thermal"
> > >
> > > +/* Maximum support banks */
> > > +#define MAX_NUM_BANK		5
> > 
> > Why is this 5?
> > Commit message states: MT8173 has four banks and five sensors, and 
> > MT2701 has only one bank and three sensors. Am i missing something here?
> > 
> 
> This is my miss, it should be 4, but it line might remove since I would
> depend on SoC type to assign array for next version.
> 
> > > +
> > >   struct mtk_thermal;
> > >
> > > +struct thermal_bank_cfg {
> > > +	unsigned int num_sensors;
> > > +	unsigned int sensors[MAX_NUM_BANK];
> > > +};
> > > +
> > >   struct mtk_thermal_bank {
> > >   	struct mtk_thermal *mt;
> > >   	int id;
> > >   };
> > >
> > > +struct mtk_thermal_sense_point {
> > > +	int msr;
> > > +	int adcpnp;
> > > +};
> > > +
> > > +struct mtk_thermal_data {
> > > +	struct thermal_bank_cfg bank_data[MAX_NUM_BANK];
> > 
> > So for MT8173 we are allocating one bank extra and for MT2701 we are 
> > allocating 4 banks extra right? Why not do something like this:
> > 
> > struct thermal_bank *banks_data
> > Assign the array based on the SoC type?
> > 
> 
> Yes, I agree with you, I would update it on next version.
> 
> > > +	struct mtk_thermal_sense_point sensing_points[MAX_NUM_BANK];
> > > +	int sensor_mux_values[MAX_NUM_BANK];
> > > +	s32 num_banks;
> > > +	s32 num_sensors;
> > > +	s32 auxadc_channel;
> > > +};
> > > +
> > >   struct mtk_thermal {
> > >   	struct device *dev;
> > >   	void __iomem *thermal_base;
> > > @@ -133,27 +163,20 @@ struct mtk_thermal {
> > >   	struct clk *clk_peri_therm;
> > >   	struct clk *clk_auxadc;
> > >
> > > -	struct mtk_thermal_bank banks[MT8173_NUM_ZONES];
> > > -
> > > +	struct mtk_thermal_bank banks[MAX_NUM_BANK];
> > 
> > Here again some extra memory allocation.
> > 
> > Why not keep a pointer which points to the desired array?
> > 
> > > +	const struct mtk_thermal_data *conf;
> > >   	/* lock: for getting and putting banks */
> > >   	struct mutex lock;
> > > +	struct thermal_zone_device *tzd;
> > >
> > >   	/* Calibration values */
> > >   	s32 adc_ge;
> > >   	s32 degc_cali;
> > >   	s32 o_slope;
> > > -	s32 vts[MT8173_NUM_SENSORS];
> > > -
> > > -};
> > > -
> > > -struct mtk_thermal_bank_cfg {
> > > -	unsigned int num_sensors;
> > > -	unsigned int sensors[MT8173_NUM_SENSORS_PER_ZONE];
> > > +	s32 vts[MAX_NUM_BANK];
> > >   };
> > >
> > > -static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
> > > -
> > > -/*
> > > +/**
> > >    * The MT8173 thermal controller has four banks. Each bank can read up to
> > >    * four temperature sensors simultaneously. The MT8173 has a total of 5
> > >    * temperature sensors. We use each bank to measure a certain area of the
> > > @@ -166,42 +189,76 @@ static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
> > >    * data, and this indeed needs the temperatures of the individual banks
> > >    * for making better decisions.
> > >    */
> > > -static const struct mtk_thermal_bank_cfg bank_data[] = {
> > > -	{
> > > -		.num_sensors = 2,
> > > -		.sensors = { MT8173_TS2, MT8173_TS3 },
> > > -	}, {
> > > -		.num_sensors = 2,
> > > -		.sensors = { MT8173_TS2, MT8173_TS4 },
> > > -	}, {
> > > -		.num_sensors = 3,
> > > -		.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
> > > -	}, {
> > > -		.num_sensors = 1,
> > > -		.sensors = { MT8173_TS2 },
> > > +static const struct mtk_thermal_data mt8173_thermal_data = {
> > > +	.auxadc_channel = MT8173_TEMP_AUXADC_CHANNEL,
> > > +	.num_banks = 4,
> > > +	.num_sensors = 5,
> > > +	.bank_data = {
> > > +		{
> > > +			.num_sensors = 2,
> > > +			.sensors = { MT8173_TS2, MT8173_TS3 },
> > > +		}, {
> > > +			.num_sensors = 2,
> > > +			.sensors = { MT8173_TS2, MT8173_TS4 },
> > > +		}, {
> > > +			.num_sensors = 3,
> > > +			.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
> > > +		}, {
> > > +			.num_sensors = 1,
> > > +			.sensors = { MT8173_TS2 },
> > > +		},
> > >   	},
> > > +	.sensing_points = {
> > > +		{
> > > +			.msr = TEMP_MSR0,
> > > +			.adcpnp = TEMP_ADCPNP0,
> > > +		}, {
> > > +			.msr = TEMP_MSR1,
> > > +			.adcpnp = TEMP_ADCPNP1,
> > > +		}, {
> > > +			.msr = TEMP_MSR2,
> > > +			.adcpnp = TEMP_ADCPNP2,
> > > +		}, {
> > > +			.msr = TEMP_MSR3,
> > > +			.adcpnp = TEMP_ADCPNP3,
> > > +		},
> > > +	},
> > > +	.sensor_mux_values = { 0, 1, 2, 3, 16 },
> > >   };
> > >
> > > -struct mtk_thermal_sense_point {
> > > -	int msr;
> > > -	int adcpnp;
> > > -};
> > > -
> > > -static const struct mtk_thermal_sense_point
> > > -		sensing_points[MT8173_NUM_SENSORS_PER_ZONE] = {
> > > -	{
> > > -		.msr = TEMP_MSR0,
> > > -		.adcpnp = TEMP_ADCPNP0,
> > > -	}, {
> > > -		.msr = TEMP_MSR1,
> > > -		.adcpnp = TEMP_ADCPNP1,
> > > -	}, {
> > > -		.msr = TEMP_MSR2,
> > > -		.adcpnp = TEMP_ADCPNP2,
> > > -	}, {
> > > -		.msr = TEMP_MSR3,
> > > -		.adcpnp = TEMP_ADCPNP3,
> > > +/**
> > > + * The MT2701 thermal controller has one bank, which can read up to
> > > + * three temperature sensors simultaneously. The MT2701 has a total of 3
> > > + * temperature sensors.
> > > + *
> > > + * The thermal core only gets the maximum temperature of this one bank,
> > > + * so the bank concept wouldn't be necessary here. However, the SVS (Smart
> > > + * Voltage Scaling) unit makes its decisions based on the same bank
> > > + * data.
> > > + */
> > > +static const struct mtk_thermal_data mt2701_thermal_data = {
> > > +	.auxadc_channel = MT2701_TEMP_AUXADC_CHANNEL,
> > > +	.num_banks = 1,
> > > +	.num_sensors = 3,
> > > +	.bank_data = {
> > > +		{
> > > +			.num_sensors = 3,
> > > +			.sensors = { MT2701_TS1, MT2701_TS2, MT2701_TSABB },
> > > +		},
> > >   	},
> > > +	.sensing_points = {
> > > +		{
> > > +			.msr = TEMP_MSR0,
> > > +			.adcpnp = TEMP_ADCPNP0,
> > > +		}, {
> > > +			.msr = TEMP_MSR1,
> > > +			.adcpnp = TEMP_ADCPNP1,
> > > +		}, {
> > > +			.msr = TEMP_MSR2,
> > > +			.adcpnp = TEMP_ADCPNP2,
> > > +		},
> > > +	},
> > > +	.sensor_mux_values = { 0, 1, 16},
> > >   };
> > >
> > >   /**
> > > @@ -270,13 +327,15 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
> > >   static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
> > >   {
> > >   	struct mtk_thermal *mt = bank->mt;
> > > +	const struct mtk_thermal_data *conf = mt->conf;
> > >   	int i, temp = INT_MIN, max = INT_MIN;
> > >   	u32 raw;
> > >
> > > -	for (i = 0; i < bank_data[bank->id].num_sensors; i++) {
> > > -		raw = readl(mt->thermal_base + sensing_points[i].msr);
> > > +	for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
> > > +		raw = readl(mt->thermal_base + conf->sensing_points[i].msr);
> > >
> > > -		temp = raw_to_mcelsius(mt, bank_data[bank->id].sensors[i], raw);
> > > +		temp = raw_to_mcelsius(mt, conf->bank_data[bank->id].sensors[i],
> > > +				       raw);
> > >
> > >   		/*
> > >   		 * The first read of a sensor often contains very high bogus
> > > @@ -299,7 +358,7 @@ static int mtk_read_temp(void *data, int *temperature)
> > >   	int i;
> > >   	int tempmax = INT_MIN;
> > >
> > > -	for (i = 0; i < MT8173_NUM_ZONES; i++) {
> > > +	for (i = 0; i < mt->conf->num_banks; i++) {
> > >   		struct mtk_thermal_bank *bank = &mt->banks[i];
> > >
> > >   		mtk_thermal_get_bank(bank);
> > > @@ -322,7 +381,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
> > >   				  u32 apmixed_phys_base, u32 auxadc_phys_base)
> > >   {
> > >   	struct mtk_thermal_bank *bank = &mt->banks[num];
> > > -	const struct mtk_thermal_bank_cfg *cfg = &bank_data[num];
> > > +	const struct mtk_thermal_data *conf = mt->conf;
> > >   	int i;
> > >
> > >   	bank->id = num;
> > > @@ -368,7 +427,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
> > >   	 * this value will be stored to TEMP_PNPMUXADDR (TEMP_SPARE0)
> > >   	 * automatically by hw
> > >   	 */
> > > -	writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCMUX);
> > > +	writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCMUX);
> > >
> > >   	/* AHB address for auxadc mux selection */
> > >   	writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
> > > @@ -379,18 +438,18 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
> > >   	       mt->thermal_base + TEMP_PNPMUXADDR);
> > >
> > >   	/* AHB value for auxadc enable */
> > > -	writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCEN);
> > > +	writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCEN);
> > >
> > >   	/* AHB address for auxadc enable (channel 0 immediate mode selected) */
> > >   	writel(auxadc_phys_base + AUXADC_CON1_SET_V,
> > >   	       mt->thermal_base + TEMP_ADCENADDR);
> > >
> > >   	/* AHB address for auxadc valid bit */
> > > -	writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
> > > +	writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
> > >   	       mt->thermal_base + TEMP_ADCVALIDADDR);
> > >
> > >   	/* AHB address for auxadc voltage output */
> > > -	writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
> > > +	writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
> > >   	       mt->thermal_base + TEMP_ADCVOLTADDR);
> > >
> > >   	/* read valid & voltage are at the same register */
> > > @@ -407,11 +466,12 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
> > >   	writel(TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
> > >   	       mt->thermal_base + TEMP_ADCWRITECTRL);
> > >
> > > -	for (i = 0; i < cfg->num_sensors; i++)
> > > -		writel(sensor_mux_values[cfg->sensors[i]],
> > > -		       mt->thermal_base + sensing_points[i].adcpnp);
> > > +	for (i = 0; i < conf->bank_data[num].num_sensors; i++)
> > > +		writel(conf->sensor_mux_values[conf->bank_data[num].sensors[i]],
> > > +		       mt->thermal_base + conf->sensing_points[i].adcpnp);
> > >
> > > -	writel((1 << cfg->num_sensors) - 1, mt->thermal_base + TEMP_MONCTL0);
> > > +	writel((1 << conf->bank_data[num].num_sensors) - 1,
> > > +	       mt->thermal_base + TEMP_MONCTL0);
> > >
> > >   	writel(TEMP_ADCWRITECTRL_ADC_PNP_WRITE |
> > >   	       TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
> > > @@ -442,7 +502,7 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
> > >
> > >   	/* Start with default values */
> > >   	mt->adc_ge = 512;
> > > -	for (i = 0; i < MT8173_NUM_SENSORS; i++)
> > > +	for (i = 0; i < mt->conf->num_sensors; i++)
> > >   		mt->vts[i] = 260;
> > >   	mt->degc_cali = 40;
> > >   	mt->o_slope = 0;
> > > @@ -467,15 +527,15 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
> > >   		goto out;
> > >   	}
> > >
> > > -	if (buf[0] & MT8173_CALIB_BUF0_VALID) {
> > > -		mt->adc_ge = MT8173_CALIB_BUF1_ADC_GE(buf[1]);
> > > -		mt->vts[MT8173_TS1] = MT8173_CALIB_BUF0_VTS_TS1(buf[0]);
> > > -		mt->vts[MT8173_TS2] = MT8173_CALIB_BUF0_VTS_TS2(buf[0]);
> > > -		mt->vts[MT8173_TS3] = MT8173_CALIB_BUF1_VTS_TS3(buf[1]);
> > > -		mt->vts[MT8173_TS4] = MT8173_CALIB_BUF2_VTS_TS4(buf[2]);
> > > -		mt->vts[MT8173_TSABB] = MT8173_CALIB_BUF2_VTS_TSABB(buf[2]);
> > > -		mt->degc_cali = MT8173_CALIB_BUF0_DEGC_CALI(buf[0]);
> > > -		mt->o_slope = MT8173_CALIB_BUF0_O_SLOPE(buf[0]);
> > > +	if (buf[0] & CALIB_BUF0_VALID) {
> > > +		mt->adc_ge = CALIB_BUF1_ADC_GE(buf[1]);
> > > +		mt->vts[NVMEM_TS1] = CALIB_BUF0_VTS_TS1(buf[0]);
> > > +		mt->vts[NVMEM_TS2] = CALIB_BUF0_VTS_TS2(buf[0]);
> > > +		mt->vts[NVMEM_TS3] = CALIB_BUF1_VTS_TS3(buf[1]);
> > > +		mt->vts[NVMEM_TS4] = CALIB_BUF2_VTS_TS4(buf[1]);
> > > +		mt->vts[NVMEM_TS5] = CALIB_BUF2_VTS_TS5(buf[2]);
> > > +		mt->degc_cali = CALIB_BUF0_DEGC_CALI(buf[0]);
> > > +		mt->o_slope = CALIB_BUF0_O_SLOPE(buf[0]);
> > 
> > I guess even the above code changes can be avoided if we just retain 
> > macros starting with MT8173?
> > 
> > Best Regards,
> > Keerthy
> > 
> 
> Yes, I think so, only different on the array size for vts since sensors
> number different between MT8173 & MT2701, I might separate it by SoC
> type on next version.
> 
> BR,
> Dawei
> 
> > >   	} else {
> > >   		dev_info(dev, "Device not calibrated, using default calibration values\n");
> > >   	}
> > > @@ -486,18 +546,36 @@ out:
> > >   	return ret;
> > >   }
> > >
> > > +static const struct of_device_id mtk_thermal_of_match[] = {
> > > +	{
> > > +		.compatible = "mediatek,mt8173-thermal",
> > > +		.data = (void *)&mt8173_thermal_data,
> > > +	},
> > > +	{
> > > +		.compatible = "mediatek,mt2701-thermal",
> > > +		.data = (void *)&mt2701_thermal_data,
> > > +	}, {
> > > +	},
> > > +};
> > > +MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);
> > > +
> > >   static int mtk_thermal_probe(struct platform_device *pdev)
> > >   {
> > >   	int ret, i;
> > >   	struct device_node *auxadc, *apmixedsys, *np = pdev->dev.of_node;
> > >   	struct mtk_thermal *mt;
> > >   	struct resource *res;
> > > +	const struct of_device_id *of_id;
> > >   	u64 auxadc_phys_base, apmixed_phys_base;
> > >
> > >   	mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
> > >   	if (!mt)
> > >   		return -ENOMEM;
> > >
> > > +	of_id = of_match_device(mtk_thermal_of_match, &pdev->dev);
> > > +	if (of_id)
> > > +		mt->conf = (const struct mtk_thermal_data *)of_id->data;
> > > +
> > >   	mt->clk_peri_therm = devm_clk_get(&pdev->dev, "therm");
> > >   	if (IS_ERR(mt->clk_peri_therm))
> > >   		return PTR_ERR(mt->clk_peri_therm);
> > > @@ -565,7 +643,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
> > >   		goto err_disable_clk_auxadc;
> > >   	}
> > >
> > > -	for (i = 0; i < MT8173_NUM_ZONES; i++)
> > > +	for (i = 0; i < mt->conf->num_banks; i++)
> > >   		mtk_thermal_init_bank(mt, i, apmixed_phys_base,
> > >   				      auxadc_phys_base);
> > >
> > > @@ -592,13 +670,6 @@ static int mtk_thermal_remove(struct platform_device *pdev)
> > >   	return 0;
> > >   }
> > >
> > > -static const struct of_device_id mtk_thermal_of_match[] = {
> > > -	{
> > > -		.compatible = "mediatek,mt8173-thermal",
> > > -	}, {
> > > -	},
> > > -};
> > > -
> > >   static struct platform_driver mtk_thermal_driver = {
> > >   	.probe = mtk_thermal_probe,
> > >   	.remove = mtk_thermal_remove,
> > > @@ -610,6 +681,7 @@ static struct platform_driver mtk_thermal_driver = {
> > >
> > >   module_platform_driver(mtk_thermal_driver);
> > >
> > > +MODULE_AUTHOR("Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>");
> > >   MODULE_AUTHOR("Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>");
> > >   MODULE_AUTHOR("Hanyi Wu <hanyi.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>");
> > >   MODULE_DESCRIPTION("Mediatek thermal driver");
> > >
> 


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Re: [PATCH 2/3] thermal: Add Mediatek thermal driver for mt2701.

[Keerthy]

On Tuesday 09 August 2016 11:25 AM, dawei chien wrote:
> Dear Keerthy,
>
> On Mon, 2016-07-11 at 16:56 +0800, dawei chien wrote:
>> Dear Keerthy,
>>
>> On Thu, 2016-07-07 at 17:24 +0530, Keerthy wrote:
>>> Hi Dawei Chien,
>>>
>>>
>>> On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
>>>> This patch adds support for mt2701 chip to mtk_thermal.c,
>>>> and integrate both mt8173 and mt2701 on the same driver.
>>>> MT8173 has four banks and five sensors, and MT2701 has
>>>> only one bank and three sensors.
>>>>
>>>> Signed-off-by: Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
>>>> ---
>>>>    drivers/thermal/mtk_thermal.c |  258 ++++++++++++++++++++++++++---------------
>>>>    1 file changed, 165 insertions(+), 93 deletions(-)
>>>>
>>>> diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
>>>> index 262ab0a..860f2e2 100644
>>>> --- a/drivers/thermal/mtk_thermal.c
>>>> +++ b/drivers/thermal/mtk_thermal.c
>>>> @@ -2,6 +2,7 @@
>>>>     * Copyright (c) 2015 MediaTek Inc.
>>>>     * Author: Hanyi Wu <hanyi.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
>>>>     *         Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
>>>> + *         Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
>>>>     *
>>>>     * This program is free software; you can redistribute it and/or modify
>>>>     * it under the terms of the GNU General Public License version 2 as
>>>> @@ -21,6 +22,7 @@
>>>>    #include <linux/nvmem-consumer.h>
>>>>    #include <linux/of.h>
>>>>    #include <linux/of_address.h>
>>>> +#include <linux/of_device.h>
>>>>    #include <linux/platform_device.h>
>>>>    #include <linux/slab.h>
>>>>    #include <linux/io.h>
>>>> @@ -88,6 +90,7 @@
>>>>    #define TEMP_ADCVALIDMASK_VALID_HIGH		BIT(5)
>>>>    #define TEMP_ADCVALIDMASK_VALID_POS(bit)	(bit)
>>>>
>>>> +/* MT8173 thermal sensors */
>>>>    #define MT8173_TS1	0
>>>>    #define MT8173_TS2	1
>>>>    #define MT8173_TS3	2
>>>> @@ -97,35 +100,62 @@
>>>>    /* AUXADC channel 11 is used for the temperature sensors */
>>>>    #define MT8173_TEMP_AUXADC_CHANNEL	11
>>>>
>>>> -/* The total number of temperature sensors in the MT8173 */
>>>> -#define MT8173_NUM_SENSORS		5
>>>> -
>>>> -/* The number of banks in the MT8173 */
>>>> -#define MT8173_NUM_ZONES		4
>>>> -
>>>> -/* The number of sensing points per bank */
>>>> -#define MT8173_NUM_SENSORS_PER_ZONE	4
>>>> -
>>>>    /* Layout of the fuses providing the calibration data */
>>>> -#define MT8173_CALIB_BUF0_VALID		BIT(0)
>>>> -#define MT8173_CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
>>>> -#define MT8173_CALIB_BUF0_VTS_TS1(x)	(((x) >> 17) & 0x1ff)
>>>> -#define MT8173_CALIB_BUF0_VTS_TS2(x)	(((x) >> 8) & 0x1ff)
>>>> -#define MT8173_CALIB_BUF1_VTS_TS3(x)	(((x) >> 0) & 0x1ff)
>>>> -#define MT8173_CALIB_BUF2_VTS_TS4(x)	(((x) >> 23) & 0x1ff)
>>>> -#define MT8173_CALIB_BUF2_VTS_TSABB(x)	(((x) >> 14) & 0x1ff)
>>>> -#define MT8173_CALIB_BUF0_DEGC_CALI(x)	(((x) >> 1) & 0x3f)
>>>> -#define MT8173_CALIB_BUF0_O_SLOPE(x)	(((x) >> 26) & 0x3f)
>>>> +#define CALIB_BUF0_VALID		BIT(0)
>>>> +#define CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
>>>> +#define CALIB_BUF0_VTS_TS1(x)	(((x) >> 17) & 0x1ff)
>>>> +#define CALIB_BUF0_VTS_TS2(x)	(((x) >> 8) & 0x1ff)
>>>> +#define CALIB_BUF1_VTS_TS3(x)	(((x) >> 0) & 0x1ff)
>>>> +#define CALIB_BUF2_VTS_TS4(x)	(((x) >> 23) & 0x1ff)
>>>> +#define CALIB_BUF2_VTS_TS5(x)	(((x) >> 14) & 0x1ff)
>>>> +#define CALIB_BUF0_DEGC_CALI(x)	(((x) >> 1) & 0x3f)
>>>> +#define CALIB_BUF0_O_SLOPE(x)	(((x) >> 26) & 0x3f)
>>>> +
>>>
>>> IMHO the above changes from defining CALIB_BUF1_ADC_GE(x) to
>>> CALIB_BUF0_O_SLOPE(x) can be avoided. We are just renaming the same
>>> defines to a generic name. Instead the macro starting with MT8173 can
>>> only be used wherever needed commonly both by 8173 instance and for
>>> 2701 instance.
>>>
>>
>> I would have a try to keep MT8173 original one and add some comment for
>> the macro starting on next version.
>
> Just confirm again,
> we don't need change common macro name, and just need to add comment for
> MT8173/MT2701, right?

Yes

>
>>>> +#define NVMEM_TS1	0
>>>> +#define NVMEM_TS2	1
>>>> +#define NVMEM_TS3	2
>>>> +#define NVMEM_TS4	3
>>>> +#define NVMEM_TS5	4
>>>> +
>>
>> Does these need to keep the old one
>> MT8173_TS1/MT8173_TS2/MT8173_TS3/MT8173_TS4/MT8173_TSABB
>
> MT8173 has 5 sensors, so it need 5 address for calibration data.
> And MT2701 has three sensors, so it need 3 address for that.
>
> Do you think we need either keep the original one or rename for these.
>
>>
>>
>>>> +/* MT2701 thermal sensors */
>>>> +#define MT2701_TS1	0
>>>> +#define MT2701_TS2	1
>>>> +#define MT2701_TSABB	2
>>>> +
>>>> +/* AUXADC channel 11 is used for the temperature sensors */
>>>> +#define MT2701_TEMP_AUXADC_CHANNEL	11
>>>>
>>>>    #define THERMAL_NAME    "mtk-thermal"
>>>>
>>>> +/* Maximum support banks */
>>>> +#define MAX_NUM_BANK		5
>>>
>>> Why is this 5?
>>> Commit message states: MT8173 has four banks and five sensors, and
>>> MT2701 has only one bank and three sensors. Am i missing something here?
>>>
>>
>> This is my miss, it should be 4, but it line might remove since I would
>> depend on SoC type to assign array for next version.
>>
>>>> +
>>>>    struct mtk_thermal;
>>>>
>>>> +struct thermal_bank_cfg {
>>>> +	unsigned int num_sensors;
>>>> +	unsigned int sensors[MAX_NUM_BANK];
>>>> +};
>>>> +
>>>>    struct mtk_thermal_bank {
>>>>    	struct mtk_thermal *mt;
>>>>    	int id;
>>>>    };
>>>>
>>>> +struct mtk_thermal_sense_point {
>>>> +	int msr;
>>>> +	int adcpnp;
>>>> +};
>>>> +
>>>> +struct mtk_thermal_data {
>>>> +	struct thermal_bank_cfg bank_data[MAX_NUM_BANK];
>>>
>>> So for MT8173 we are allocating one bank extra and for MT2701 we are
>>> allocating 4 banks extra right? Why not do something like this:
>>>
>>> struct thermal_bank *banks_data
>>> Assign the array based on the SoC type?
>>>
>>
>> Yes, I agree with you, I would update it on next version.
>>
>>>> +	struct mtk_thermal_sense_point sensing_points[MAX_NUM_BANK];
>>>> +	int sensor_mux_values[MAX_NUM_BANK];
>>>> +	s32 num_banks;
>>>> +	s32 num_sensors;
>>>> +	s32 auxadc_channel;
>>>> +};
>>>> +
>>>>    struct mtk_thermal {
>>>>    	struct device *dev;
>>>>    	void __iomem *thermal_base;
>>>> @@ -133,27 +163,20 @@ struct mtk_thermal {
>>>>    	struct clk *clk_peri_therm;
>>>>    	struct clk *clk_auxadc;
>>>>
>>>> -	struct mtk_thermal_bank banks[MT8173_NUM_ZONES];
>>>> -
>>>> +	struct mtk_thermal_bank banks[MAX_NUM_BANK];
>>>
>>> Here again some extra memory allocation.
>>>
>>> Why not keep a pointer which points to the desired array?
>>>
>>>> +	const struct mtk_thermal_data *conf;
>>>>    	/* lock: for getting and putting banks */
>>>>    	struct mutex lock;
>>>> +	struct thermal_zone_device *tzd;
>>>>
>>>>    	/* Calibration values */
>>>>    	s32 adc_ge;
>>>>    	s32 degc_cali;
>>>>    	s32 o_slope;
>>>> -	s32 vts[MT8173_NUM_SENSORS];
>>>> -
>>>> -};
>>>> -
>>>> -struct mtk_thermal_bank_cfg {
>>>> -	unsigned int num_sensors;
>>>> -	unsigned int sensors[MT8173_NUM_SENSORS_PER_ZONE];
>>>> +	s32 vts[MAX_NUM_BANK];
>>>>    };
>>>>
>>>> -static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
>>>> -
>>>> -/*
>>>> +/**
>>>>     * The MT8173 thermal controller has four banks. Each bank can read up to
>>>>     * four temperature sensors simultaneously. The MT8173 has a total of 5
>>>>     * temperature sensors. We use each bank to measure a certain area of the
>>>> @@ -166,42 +189,76 @@ static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
>>>>     * data, and this indeed needs the temperatures of the individual banks
>>>>     * for making better decisions.
>>>>     */
>>>> -static const struct mtk_thermal_bank_cfg bank_data[] = {
>>>> -	{
>>>> -		.num_sensors = 2,
>>>> -		.sensors = { MT8173_TS2, MT8173_TS3 },
>>>> -	}, {
>>>> -		.num_sensors = 2,
>>>> -		.sensors = { MT8173_TS2, MT8173_TS4 },
>>>> -	}, {
>>>> -		.num_sensors = 3,
>>>> -		.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
>>>> -	}, {
>>>> -		.num_sensors = 1,
>>>> -		.sensors = { MT8173_TS2 },
>>>> +static const struct mtk_thermal_data mt8173_thermal_data = {
>>>> +	.auxadc_channel = MT8173_TEMP_AUXADC_CHANNEL,
>>>> +	.num_banks = 4,
>>>> +	.num_sensors = 5,
>>>> +	.bank_data = {
>>>> +		{
>>>> +			.num_sensors = 2,
>>>> +			.sensors = { MT8173_TS2, MT8173_TS3 },
>>>> +		}, {
>>>> +			.num_sensors = 2,
>>>> +			.sensors = { MT8173_TS2, MT8173_TS4 },
>>>> +		}, {
>>>> +			.num_sensors = 3,
>>>> +			.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
>>>> +		}, {
>>>> +			.num_sensors = 1,
>>>> +			.sensors = { MT8173_TS2 },
>>>> +		},
>>>>    	},
>>>> +	.sensing_points = {
>>>> +		{
>>>> +			.msr = TEMP_MSR0,
>>>> +			.adcpnp = TEMP_ADCPNP0,
>>>> +		}, {
>>>> +			.msr = TEMP_MSR1,
>>>> +			.adcpnp = TEMP_ADCPNP1,
>>>> +		}, {
>>>> +			.msr = TEMP_MSR2,
>>>> +			.adcpnp = TEMP_ADCPNP2,
>>>> +		}, {
>>>> +			.msr = TEMP_MSR3,
>>>> +			.adcpnp = TEMP_ADCPNP3,
>>>> +		},
>>>> +	},
>>>> +	.sensor_mux_values = { 0, 1, 2, 3, 16 },
>>>>    };
>>>>
>>>> -struct mtk_thermal_sense_point {
>>>> -	int msr;
>>>> -	int adcpnp;
>>>> -};
>>>> -
>>>> -static const struct mtk_thermal_sense_point
>>>> -		sensing_points[MT8173_NUM_SENSORS_PER_ZONE] = {
>>>> -	{
>>>> -		.msr = TEMP_MSR0,
>>>> -		.adcpnp = TEMP_ADCPNP0,
>>>> -	}, {
>>>> -		.msr = TEMP_MSR1,
>>>> -		.adcpnp = TEMP_ADCPNP1,
>>>> -	}, {
>>>> -		.msr = TEMP_MSR2,
>>>> -		.adcpnp = TEMP_ADCPNP2,
>>>> -	}, {
>>>> -		.msr = TEMP_MSR3,
>>>> -		.adcpnp = TEMP_ADCPNP3,
>>>> +/**
>>>> + * The MT2701 thermal controller has one bank, which can read up to
>>>> + * three temperature sensors simultaneously. The MT2701 has a total of 3
>>>> + * temperature sensors.
>>>> + *
>>>> + * The thermal core only gets the maximum temperature of this one bank,
>>>> + * so the bank concept wouldn't be necessary here. However, the SVS (Smart
>>>> + * Voltage Scaling) unit makes its decisions based on the same bank
>>>> + * data.
>>>> + */
>>>> +static const struct mtk_thermal_data mt2701_thermal_data = {
>>>> +	.auxadc_channel = MT2701_TEMP_AUXADC_CHANNEL,
>>>> +	.num_banks = 1,
>>>> +	.num_sensors = 3,
>>>> +	.bank_data = {
>>>> +		{
>>>> +			.num_sensors = 3,
>>>> +			.sensors = { MT2701_TS1, MT2701_TS2, MT2701_TSABB },
>>>> +		},
>>>>    	},
>>>> +	.sensing_points = {
>>>> +		{
>>>> +			.msr = TEMP_MSR0,
>>>> +			.adcpnp = TEMP_ADCPNP0,
>>>> +		}, {
>>>> +			.msr = TEMP_MSR1,
>>>> +			.adcpnp = TEMP_ADCPNP1,
>>>> +		}, {
>>>> +			.msr = TEMP_MSR2,
>>>> +			.adcpnp = TEMP_ADCPNP2,
>>>> +		},
>>>> +	},
>>>> +	.sensor_mux_values = { 0, 1, 16},
>>>>    };
>>>>
>>>>    /**
>>>> @@ -270,13 +327,15 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
>>>>    static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
>>>>    {
>>>>    	struct mtk_thermal *mt = bank->mt;
>>>> +	const struct mtk_thermal_data *conf = mt->conf;
>>>>    	int i, temp = INT_MIN, max = INT_MIN;
>>>>    	u32 raw;
>>>>
>>>> -	for (i = 0; i < bank_data[bank->id].num_sensors; i++) {
>>>> -		raw = readl(mt->thermal_base + sensing_points[i].msr);
>>>> +	for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
>>>> +		raw = readl(mt->thermal_base + conf->sensing_points[i].msr);
>>>>
>>>> -		temp = raw_to_mcelsius(mt, bank_data[bank->id].sensors[i], raw);
>>>> +		temp = raw_to_mcelsius(mt, conf->bank_data[bank->id].sensors[i],
>>>> +				       raw);
>>>>
>>>>    		/*
>>>>    		 * The first read of a sensor often contains very high bogus
>>>> @@ -299,7 +358,7 @@ static int mtk_read_temp(void *data, int *temperature)
>>>>    	int i;
>>>>    	int tempmax = INT_MIN;
>>>>
>>>> -	for (i = 0; i < MT8173_NUM_ZONES; i++) {
>>>> +	for (i = 0; i < mt->conf->num_banks; i++) {
>>>>    		struct mtk_thermal_bank *bank = &mt->banks[i];
>>>>
>>>>    		mtk_thermal_get_bank(bank);
>>>> @@ -322,7 +381,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
>>>>    				  u32 apmixed_phys_base, u32 auxadc_phys_base)
>>>>    {
>>>>    	struct mtk_thermal_bank *bank = &mt->banks[num];
>>>> -	const struct mtk_thermal_bank_cfg *cfg = &bank_data[num];
>>>> +	const struct mtk_thermal_data *conf = mt->conf;
>>>>    	int i;
>>>>
>>>>    	bank->id = num;
>>>> @@ -368,7 +427,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
>>>>    	 * this value will be stored to TEMP_PNPMUXADDR (TEMP_SPARE0)
>>>>    	 * automatically by hw
>>>>    	 */
>>>> -	writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCMUX);
>>>> +	writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCMUX);
>>>>
>>>>    	/* AHB address for auxadc mux selection */
>>>>    	writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
>>>> @@ -379,18 +438,18 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
>>>>    	       mt->thermal_base + TEMP_PNPMUXADDR);
>>>>
>>>>    	/* AHB value for auxadc enable */
>>>> -	writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCEN);
>>>> +	writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCEN);
>>>>
>>>>    	/* AHB address for auxadc enable (channel 0 immediate mode selected) */
>>>>    	writel(auxadc_phys_base + AUXADC_CON1_SET_V,
>>>>    	       mt->thermal_base + TEMP_ADCENADDR);
>>>>
>>>>    	/* AHB address for auxadc valid bit */
>>>> -	writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
>>>> +	writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
>>>>    	       mt->thermal_base + TEMP_ADCVALIDADDR);
>>>>
>>>>    	/* AHB address for auxadc voltage output */
>>>> -	writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
>>>> +	writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
>>>>    	       mt->thermal_base + TEMP_ADCVOLTADDR);
>>>>
>>>>    	/* read valid & voltage are at the same register */
>>>> @@ -407,11 +466,12 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
>>>>    	writel(TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
>>>>    	       mt->thermal_base + TEMP_ADCWRITECTRL);
>>>>
>>>> -	for (i = 0; i < cfg->num_sensors; i++)
>>>> -		writel(sensor_mux_values[cfg->sensors[i]],
>>>> -		       mt->thermal_base + sensing_points[i].adcpnp);
>>>> +	for (i = 0; i < conf->bank_data[num].num_sensors; i++)
>>>> +		writel(conf->sensor_mux_values[conf->bank_data[num].sensors[i]],
>>>> +		       mt->thermal_base + conf->sensing_points[i].adcpnp);
>>>>
>>>> -	writel((1 << cfg->num_sensors) - 1, mt->thermal_base + TEMP_MONCTL0);
>>>> +	writel((1 << conf->bank_data[num].num_sensors) - 1,
>>>> +	       mt->thermal_base + TEMP_MONCTL0);
>>>>
>>>>    	writel(TEMP_ADCWRITECTRL_ADC_PNP_WRITE |
>>>>    	       TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
>>>> @@ -442,7 +502,7 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
>>>>
>>>>    	/* Start with default values */
>>>>    	mt->adc_ge = 512;
>>>> -	for (i = 0; i < MT8173_NUM_SENSORS; i++)
>>>> +	for (i = 0; i < mt->conf->num_sensors; i++)
>>>>    		mt->vts[i] = 260;
>>>>    	mt->degc_cali = 40;
>>>>    	mt->o_slope = 0;
>>>> @@ -467,15 +527,15 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
>>>>    		goto out;
>>>>    	}
>>>>
>>>> -	if (buf[0] & MT8173_CALIB_BUF0_VALID) {
>>>> -		mt->adc_ge = MT8173_CALIB_BUF1_ADC_GE(buf[1]);
>>>> -		mt->vts[MT8173_TS1] = MT8173_CALIB_BUF0_VTS_TS1(buf[0]);
>>>> -		mt->vts[MT8173_TS2] = MT8173_CALIB_BUF0_VTS_TS2(buf[0]);
>>>> -		mt->vts[MT8173_TS3] = MT8173_CALIB_BUF1_VTS_TS3(buf[1]);
>>>> -		mt->vts[MT8173_TS4] = MT8173_CALIB_BUF2_VTS_TS4(buf[2]);
>>>> -		mt->vts[MT8173_TSABB] = MT8173_CALIB_BUF2_VTS_TSABB(buf[2]);
>>>> -		mt->degc_cali = MT8173_CALIB_BUF0_DEGC_CALI(buf[0]);
>>>> -		mt->o_slope = MT8173_CALIB_BUF0_O_SLOPE(buf[0]);
>>>> +	if (buf[0] & CALIB_BUF0_VALID) {
>>>> +		mt->adc_ge = CALIB_BUF1_ADC_GE(buf[1]);
>>>> +		mt->vts[NVMEM_TS1] = CALIB_BUF0_VTS_TS1(buf[0]);
>>>> +		mt->vts[NVMEM_TS2] = CALIB_BUF0_VTS_TS2(buf[0]);
>>>> +		mt->vts[NVMEM_TS3] = CALIB_BUF1_VTS_TS3(buf[1]);
>>>> +		mt->vts[NVMEM_TS4] = CALIB_BUF2_VTS_TS4(buf[1]);
>>>> +		mt->vts[NVMEM_TS5] = CALIB_BUF2_VTS_TS5(buf[2]);
>>>> +		mt->degc_cali = CALIB_BUF0_DEGC_CALI(buf[0]);
>>>> +		mt->o_slope = CALIB_BUF0_O_SLOPE(buf[0]);
>>>
>>> I guess even the above code changes can be avoided if we just retain
>>> macros starting with MT8173?
>>>
>>> Best Regards,
>>> Keerthy
>>>
>>
>> Yes, I think so, only different on the array size for vts since sensors
>> number different between MT8173 & MT2701, I might separate it by SoC
>> type on next version.
>>
>> BR,
>> Dawei
>>
>>>>    	} else {
>>>>    		dev_info(dev, "Device not calibrated, using default calibration values\n");
>>>>    	}
>>>> @@ -486,18 +546,36 @@ out:
>>>>    	return ret;
>>>>    }
>>>>
>>>> +static const struct of_device_id mtk_thermal_of_match[] = {
>>>> +	{
>>>> +		.compatible = "mediatek,mt8173-thermal",
>>>> +		.data = (void *)&mt8173_thermal_data,
>>>> +	},
>>>> +	{
>>>> +		.compatible = "mediatek,mt2701-thermal",
>>>> +		.data = (void *)&mt2701_thermal_data,
>>>> +	}, {
>>>> +	},
>>>> +};
>>>> +MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);
>>>> +
>>>>    static int mtk_thermal_probe(struct platform_device *pdev)
>>>>    {
>>>>    	int ret, i;
>>>>    	struct device_node *auxadc, *apmixedsys, *np = pdev->dev.of_node;
>>>>    	struct mtk_thermal *mt;
>>>>    	struct resource *res;
>>>> +	const struct of_device_id *of_id;
>>>>    	u64 auxadc_phys_base, apmixed_phys_base;
>>>>
>>>>    	mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
>>>>    	if (!mt)
>>>>    		return -ENOMEM;
>>>>
>>>> +	of_id = of_match_device(mtk_thermal_of_match, &pdev->dev);
>>>> +	if (of_id)
>>>> +		mt->conf = (const struct mtk_thermal_data *)of_id->data;
>>>> +
>>>>    	mt->clk_peri_therm = devm_clk_get(&pdev->dev, "therm");
>>>>    	if (IS_ERR(mt->clk_peri_therm))
>>>>    		return PTR_ERR(mt->clk_peri_therm);
>>>> @@ -565,7 +643,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
>>>>    		goto err_disable_clk_auxadc;
>>>>    	}
>>>>
>>>> -	for (i = 0; i < MT8173_NUM_ZONES; i++)
>>>> +	for (i = 0; i < mt->conf->num_banks; i++)
>>>>    		mtk_thermal_init_bank(mt, i, apmixed_phys_base,
>>>>    				      auxadc_phys_base);
>>>>
>>>> @@ -592,13 +670,6 @@ static int mtk_thermal_remove(struct platform_device *pdev)
>>>>    	return 0;
>>>>    }
>>>>
>>>> -static const struct of_device_id mtk_thermal_of_match[] = {
>>>> -	{
>>>> -		.compatible = "mediatek,mt8173-thermal",
>>>> -	}, {
>>>> -	},
>>>> -};
>>>> -
>>>>    static struct platform_driver mtk_thermal_driver = {
>>>>    	.probe = mtk_thermal_probe,
>>>>    	.remove = mtk_thermal_remove,
>>>> @@ -610,6 +681,7 @@ static struct platform_driver mtk_thermal_driver = {
>>>>
>>>>    module_platform_driver(mtk_thermal_driver);
>>>>
>>>> +MODULE_AUTHOR("Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>");
>>>>    MODULE_AUTHOR("Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>");
>>>>    MODULE_AUTHOR("Hanyi Wu <hanyi.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>");
>>>>    MODULE_DESCRIPTION("Mediatek thermal driver");
>>>>
>>
>
>

[PATCH 3/3] arm: dts: thermal: add thermal/auxadc node.

[Dawei Chien]

This adds the thermal controller and auxadc nodes
to the Mediatek MT2701 dtsi file.

Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
---
This patch depned on:
https://patchwork.kernel.org/patch/9213545/
---
 arch/arm/boot/dts/mt2701.dtsi |   43 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
index 2ac8b50..0834a23 100644
--- a/arch/arm/boot/dts/mt2701.dtsi
+++ b/arch/arm/boot/dts/mt2701.dtsi
@@ -77,6 +77,36 @@
 		#clock-cells = <0>;
 	};
 
+	thermal-zones {
+		cpu_thermal: cpu_thermal {
+			polling-delay-passive = <1000>; /* milliseconds */
+			polling-delay = <1000>; /* milliseconds */
+
+			thermal-sensors = <&thermal 0>;
+			sustainable-power = <1000>;
+
+			trips {
+				threshold: trip-point@0 {
+					temperature = <68000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				target: trip-point@1 {
+					temperature = <85000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				cpu_crit: cpu_crit@0 {
+					temperature = <115000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+		};
+	};
+
 	timer {
 		compatible = "arm,armv7-timer";
 		interrupt-parent = <&gic>;
@@ -183,4 +213,17 @@
 		clocks = <&uart_clk>;
 		status = "disabled";
 	};
+
+	thermal: thermal@1100b000 {
+		#thermal-sensor-cells = <0>;
+		compatible = "mediatek,mt2701-thermal";
+		reg = <0 0x1100b000 0 0x1000>;
+		interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
+		clock-names = "therm", "auxadc";
+		resets = <&pericfg 0x10>;
+		reset-names = "therm";
+		mediatek,auxadc = <&auxadc>;
+		mediatek,apmixedsys = <&apmixedsys>;
+	};
 };
-- 
1.7.9.5

Re: [PATCH 3/3] arm: dts: thermal: add thermal/auxadc node.

[Keerthy]

On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
> This adds the thermal controller and auxadc nodes
> to the Mediatek MT2701 dtsi file.
>
> Signed-off-by: Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> ---
> This patch depned on:
> https://patchwork.kernel.org/patch/9213545/
> ---
>   arch/arm/boot/dts/mt2701.dtsi |   43 +++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 43 insertions(+)
>
> diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
> index 2ac8b50..0834a23 100644
> --- a/arch/arm/boot/dts/mt2701.dtsi
> +++ b/arch/arm/boot/dts/mt2701.dtsi
> @@ -77,6 +77,36 @@
>   		#clock-cells = <0>;
>   	};
>
> +	thermal-zones {
> +		cpu_thermal: cpu_thermal {
> +			polling-delay-passive = <1000>; /* milliseconds */
> +			polling-delay = <1000>; /* milliseconds */
> +
> +			thermal-sensors = <&thermal 0>;
> +			sustainable-power = <1000>;
> +
> +			trips {
> +				threshold: trip-point@0 {
> +					temperature = <68000>;
> +					hysteresis = <2000>;
> +					type = "passive";
> +				};
> +
> +				target: trip-point@1 {
> +					temperature = <85000>;
> +					hysteresis = <2000>;
> +					type = "passive";
> +				};
> +
> +				cpu_crit: cpu_crit@0 {
> +					temperature = <115000>;
> +					hysteresis = <2000>;
> +					type = "critical";
> +				};
> +			};
> +		};
> +	};
> +

are there any corresponding cooling-maps?

>   	timer {
>   		compatible = "arm,armv7-timer";
>   		interrupt-parent = <&gic>;
> @@ -183,4 +213,17 @@
>   		clocks = <&uart_clk>;
>   		status = "disabled";
>   	};
> +
> +	thermal: thermal@1100b000 {
> +		#thermal-sensor-cells = <0>;
> +		compatible = "mediatek,mt2701-thermal";
> +		reg = <0 0x1100b000 0 0x1000>;
> +		interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
> +		clock-names = "therm", "auxadc";
> +		resets = <&pericfg 0x10>;
> +		reset-names = "therm";
> +		mediatek,auxadc = <&auxadc>;
> +		mediatek,apmixedsys = <&apmixedsys>;
> +	};
>   };
>

Re: [PATCH 3/3] arm: dts: thermal: add thermal/auxadc node.

[dawei chien]

Dear Keerthy,

On Thu, 2016-07-07 at 17:39 +0530, Keerthy wrote:
> 
> On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
> > This adds the thermal controller and auxadc nodes
> > to the Mediatek MT2701 dtsi file.
> >
> > Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
> > ---
> > This patch depned on:
> > https://patchwork.kernel.org/patch/9213545/
> > ---
> >   arch/arm/boot/dts/mt2701.dtsi |   43 +++++++++++++++++++++++++++++++++++++++++
> >   1 file changed, 43 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
> > index 2ac8b50..0834a23 100644
> > --- a/arch/arm/boot/dts/mt2701.dtsi
> > +++ b/arch/arm/boot/dts/mt2701.dtsi
> > @@ -77,6 +77,36 @@
> >   		#clock-cells = <0>;
> >   	};
> >
> > +	thermal-zones {
> > +		cpu_thermal: cpu_thermal {
> > +			polling-delay-passive = <1000>; /* milliseconds */
> > +			polling-delay = <1000>; /* milliseconds */
> > +
> > +			thermal-sensors = <&thermal 0>;
> > +			sustainable-power = <1000>;
> > +
> > +			trips {
> > +				threshold: trip-point@0 {
> > +					temperature = <68000>;
> > +					hysteresis = <2000>;
> > +					type = "passive";
> > +				};
> > +
> > +				target: trip-point@1 {
> > +					temperature = <85000>;
> > +					hysteresis = <2000>;
> > +					type = "passive";
> > +				};
> > +
> > +				cpu_crit: cpu_crit@0 {
> > +					temperature = <115000>;
> > +					hysteresis = <2000>;
> > +					type = "critical";
> > +				};
> > +			};
> > +		};
> > +	};
> > +
> 
> are there any corresponding cooling-maps?

Since MT2701 does not register CPUFREQ cooling device and its' own
device node, I could not add cooling-maps so far.
Could we add cooling map after CPUFREQ ready, thank you.

> 
> >   	timer {
> >   		compatible = "arm,armv7-timer";
> >   		interrupt-parent = <&gic>;
> > @@ -183,4 +213,17 @@
> >   		clocks = <&uart_clk>;
> >   		status = "disabled";
> >   	};
> > +
> > +	thermal: thermal@1100b000 {
> > +		#thermal-sensor-cells = <0>;
> > +		compatible = "mediatek,mt2701-thermal";
> > +		reg = <0 0x1100b000 0 0x1000>;
> > +		interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_LOW>;
> > +		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
> > +		clock-names = "therm", "auxadc";
> > +		resets = <&pericfg 0x10>;
> > +		reset-names = "therm";
> > +		mediatek,auxadc = <&auxadc>;
> > +		mediatek,apmixedsys = <&apmixedsys>;
> > +	};
> >   };
> >

Re: [PATCH 3/3] arm: dts: thermal: add thermal/auxadc node.

[Keerthy]

On Monday 11 July 2016 02:26 PM, dawei chien wrote:
> Dear Keerthy,
>
> On Thu, 2016-07-07 at 17:39 +0530, Keerthy wrote:
>>
>> On Thursday 07 July 2016 02:36 PM, Dawei Chien wrote:
>>> This adds the thermal controller and auxadc nodes
>>> to the Mediatek MT2701 dtsi file.
>>>
>>> Signed-off-by: Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
>>> ---
>>> This patch depned on:
>>> https://patchwork.kernel.org/patch/9213545/
>>> ---
>>>    arch/arm/boot/dts/mt2701.dtsi |   43 +++++++++++++++++++++++++++++++++++++++++
>>>    1 file changed, 43 insertions(+)
>>>
>>> diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
>>> index 2ac8b50..0834a23 100644
>>> --- a/arch/arm/boot/dts/mt2701.dtsi
>>> +++ b/arch/arm/boot/dts/mt2701.dtsi
>>> @@ -77,6 +77,36 @@
>>>    		#clock-cells = <0>;
>>>    	};
>>>
>>> +	thermal-zones {
>>> +		cpu_thermal: cpu_thermal {
>>> +			polling-delay-passive = <1000>; /* milliseconds */
>>> +			polling-delay = <1000>; /* milliseconds */
>>> +
>>> +			thermal-sensors = <&thermal 0>;
>>> +			sustainable-power = <1000>;
>>> +
>>> +			trips {
>>> +				threshold: trip-point@0 {
>>> +					temperature = <68000>;
>>> +					hysteresis = <2000>;
>>> +					type = "passive";
>>> +				};
>>> +
>>> +				target: trip-point@1 {
>>> +					temperature = <85000>;
>>> +					hysteresis = <2000>;
>>> +					type = "passive";
>>> +				};
>>> +
>>> +				cpu_crit: cpu_crit@0 {
>>> +					temperature = <115000>;
>>> +					hysteresis = <2000>;
>>> +					type = "critical";
>>> +				};
>>> +			};
>>> +		};
>>> +	};
>>> +
>>
>> are there any corresponding cooling-maps?
>
> Since MT2701 does not register CPUFREQ cooling device and its' own
> device node, I could not add cooling-maps so far.
> Could we add cooling map after CPUFREQ ready, thank you.

Okay. I was curious to know about the cooling agents.

>
>>
>>>    	timer {
>>>    		compatible = "arm,armv7-timer";
>>>    		interrupt-parent = <&gic>;
>>> @@ -183,4 +213,17 @@
>>>    		clocks = <&uart_clk>;
>>>    		status = "disabled";
>>>    	};
>>> +
>>> +	thermal: thermal@1100b000 {
>>> +		#thermal-sensor-cells = <0>;
>>> +		compatible = "mediatek,mt2701-thermal";
>>> +		reg = <0 0x1100b000 0 0x1000>;
>>> +		interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_LOW>;
>>> +		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
>>> +		clock-names = "therm", "auxadc";
>>> +		resets = <&pericfg 0x10>;
>>> +		reset-names = "therm";
>>> +		mediatek,auxadc = <&auxadc>;
>>> +		mediatek,apmixedsys = <&apmixedsys>;
>>> +	};
>>>    };
>>>
>
>

Re: [PATCH 3/3] arm: dts: thermal: add thermal/auxadc node.

[Matthias Brugger]

On 07/07/16 11:06, Dawei Chien wrote:
> This adds the thermal controller and auxadc nodes
> to the Mediatek MT2701 dtsi file.
>
> Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
> ---
> This patch depned on:
> https://patchwork.kernel.org/patch/9213545/
> ---
>  arch/arm/boot/dts/mt2701.dtsi |   43 +++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
>
> diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
> index 2ac8b50..0834a23 100644
> --- a/arch/arm/boot/dts/mt2701.dtsi
> +++ b/arch/arm/boot/dts/mt2701.dtsi
> @@ -77,6 +77,36 @@
>  		#clock-cells = <0>;
>  	};
>
> +	thermal-zones {
> +		cpu_thermal: cpu_thermal {
> +			polling-delay-passive = <1000>; /* milliseconds */
> +			polling-delay = <1000>; /* milliseconds */
> +
> +			thermal-sensors = <&thermal 0>;
> +			sustainable-power = <1000>;
> +
> +			trips {
> +				threshold: trip-point@0 {
> +					temperature = <68000>;
> +					hysteresis = <2000>;
> +					type = "passive";
> +				};
> +
> +				target: trip-point@1 {
> +					temperature = <85000>;
> +					hysteresis = <2000>;
> +					type = "passive";
> +				};
> +
> +				cpu_crit: cpu_crit@0 {
> +					temperature = <115000>;
> +					hysteresis = <2000>;
> +					type = "critical";
> +				};
> +			};
> +		};
> +	};
> +
>  	timer {
>  		compatible = "arm,armv7-timer";
>  		interrupt-parent = <&gic>;
> @@ -183,4 +213,17 @@
>  		clocks = <&uart_clk>;
>  		status = "disabled";
>  	};
> +
> +	thermal: thermal@1100b000 {
> +		#thermal-sensor-cells = <0>;
> +		compatible = "mediatek,mt2701-thermal";
> +		reg = <0 0x1100b000 0 0x1000>;
> +		interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
> +		clock-names = "therm", "auxadc";
> +		resets = <&pericfg 0x10>;
> +		reset-names = "therm";
> +		mediatek,auxadc = <&auxadc>;
> +		mediatek,apmixedsys = <&apmixedsys>;
> +	};
>  };
>

what about:
status = "disabled"; ?

Re: [PATCH 3/3] arm: dts: thermal: add thermal/auxadc node.

[dawei chien]

Hi Matthias,

On Thu, 2016-08-11 at 17:51 +0200, Matthias Brugger wrote:
> 
> On 07/07/16 11:06, Dawei Chien wrote:
> > This adds the thermal controller and auxadc nodes
> > to the Mediatek MT2701 dtsi file.
> >
> > Signed-off-by: Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> > ---
> > This patch depned on:
> > https://patchwork.kernel.org/patch/9213545/
> > ---
> >  arch/arm/boot/dts/mt2701.dtsi |   43 +++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 43 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
> > index 2ac8b50..0834a23 100644
> > --- a/arch/arm/boot/dts/mt2701.dtsi
> > +++ b/arch/arm/boot/dts/mt2701.dtsi
> > @@ -77,6 +77,36 @@
> >  		#clock-cells = <0>;
> >  	};
> >
> > +	thermal-zones {
> > +		cpu_thermal: cpu_thermal {
> > +			polling-delay-passive = <1000>; /* milliseconds */
> > +			polling-delay = <1000>; /* milliseconds */
> > +
> > +			thermal-sensors = <&thermal 0>;
> > +			sustainable-power = <1000>;
> > +
> > +			trips {
> > +				threshold: trip-point@0 {
> > +					temperature = <68000>;
> > +					hysteresis = <2000>;
> > +					type = "passive";
> > +				};
> > +
> > +				target: trip-point@1 {
> > +					temperature = <85000>;
> > +					hysteresis = <2000>;
> > +					type = "passive";
> > +				};
> > +
> > +				cpu_crit: cpu_crit@0 {
> > +					temperature = <115000>;
> > +					hysteresis = <2000>;
> > +					type = "critical";
> > +				};
> > +			};
> > +		};
> > +	};
> > +
> >  	timer {
> >  		compatible = "arm,armv7-timer";
> >  		interrupt-parent = <&gic>;
> > @@ -183,4 +213,17 @@
> >  		clocks = <&uart_clk>;
> >  		status = "disabled";
> >  	};
> > +
> > +	thermal: thermal@1100b000 {
> > +		#thermal-sensor-cells = <0>;
> > +		compatible = "mediatek,mt2701-thermal";
> > +		reg = <0 0x1100b000 0 0x1000>;
> > +		interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_LOW>;
> > +		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
> > +		clock-names = "therm", "auxadc";
> > +		resets = <&pericfg 0x10>;
> > +		reset-names = "therm";
> > +		mediatek,auxadc = <&auxadc>;
> > +		mediatek,apmixedsys = <&apmixedsys>;
> > +	};
> >  };
> >
> 
> what about:
> status = "disabled"; ?

Since thermal driver would protect our platform by shutdown method once
SoC temperature over critical point, I prefer keep this rather than
disabling, how do you think, thank you.

BR,
Dawei

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Re: [PATCH 3/3] arm: dts: thermal: add thermal/auxadc node.

[Matthias Brugger]

On 15/08/16 09:14, dawei chien wrote:
> Hi Matthias,
>
> On Thu, 2016-08-11 at 17:51 +0200, Matthias Brugger wrote:
>>
>> On 07/07/16 11:06, Dawei Chien wrote:
>>> This adds the thermal controller and auxadc nodes
>>> to the Mediatek MT2701 dtsi file.
>>>
>>> Signed-off-by: Dawei Chien <dawei.chien-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
>>> ---
>>> This patch depned on:
>>> https://patchwork.kernel.org/patch/9213545/
>>> ---
>>>  arch/arm/boot/dts/mt2701.dtsi |   43 +++++++++++++++++++++++++++++++++++++++++
>>>  1 file changed, 43 insertions(+)
>>>
>>> diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
>>> index 2ac8b50..0834a23 100644
>>> --- a/arch/arm/boot/dts/mt2701.dtsi
>>> +++ b/arch/arm/boot/dts/mt2701.dtsi
>>> @@ -77,6 +77,36 @@
>>>  		#clock-cells = <0>;
>>>  	};
>>>
>>> +	thermal-zones {
>>> +		cpu_thermal: cpu_thermal {
>>> +			polling-delay-passive = <1000>; /* milliseconds */
>>> +			polling-delay = <1000>; /* milliseconds */
>>> +
>>> +			thermal-sensors = <&thermal 0>;
>>> +			sustainable-power = <1000>;
>>> +
>>> +			trips {
>>> +				threshold: trip-point@0 {
>>> +					temperature = <68000>;
>>> +					hysteresis = <2000>;
>>> +					type = "passive";
>>> +				};
>>> +
>>> +				target: trip-point@1 {
>>> +					temperature = <85000>;
>>> +					hysteresis = <2000>;
>>> +					type = "passive";
>>> +				};
>>> +
>>> +				cpu_crit: cpu_crit@0 {
>>> +					temperature = <115000>;
>>> +					hysteresis = <2000>;
>>> +					type = "critical";
>>> +				};
>>> +			};
>>> +		};
>>> +	};
>>> +
>>>  	timer {
>>>  		compatible = "arm,armv7-timer";
>>>  		interrupt-parent = <&gic>;
>>> @@ -183,4 +213,17 @@
>>>  		clocks = <&uart_clk>;
>>>  		status = "disabled";
>>>  	};
>>> +
>>> +	thermal: thermal@1100b000 {
>>> +		#thermal-sensor-cells = <0>;
>>> +		compatible = "mediatek,mt2701-thermal";
>>> +		reg = <0 0x1100b000 0 0x1000>;
>>> +		interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_LOW>;
>>> +		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
>>> +		clock-names = "therm", "auxadc";
>>> +		resets = <&pericfg 0x10>;
>>> +		reset-names = "therm";
>>> +		mediatek,auxadc = <&auxadc>;
>>> +		mediatek,apmixedsys = <&apmixedsys>;
>>> +	};
>>>  };
>>>
>>
>> what about:
>> status = "disabled"; ?
>
> Since thermal driver would protect our platform by shutdown method once
> SoC temperature over critical point, I prefer keep this rather than
> disabling, how do you think, thank you.
>

Sounds reasonable. Thanks

[PATCH v10] Add Mediatek thermal support

[Sascha Hauer]

This series adds support for the thermal sensors included in the
MT8173 SoC. Currently only basic temperature reading is supported
without any interrupt support.

The cpufreq driver for MT8173 is currently under review, so there's no
real cooling device available in mainline. Until this is available the
thermal driver can be tested with the following dts snippet. It creates
a fake gpio fan and a fake trip point which is so low that it can easily
be reached with a "cat /dev/zero > /dev/null" on the command line.

Sascha

changes since v9:
- rebase on v4.3
- Add support for reading the calibration values from nvmem fuses
- Only register a single thermal zone instead of four as it seems
  that's everything needed

changes since v8:
- Add commit description to binding patch
- rebase on v4.3-rc2

changes since v7:
- re-add some used defines removed in v5
- Use MT8173_THERMAL_ZONE_* defines as array indices in static initializers

changes since v6:
- remove dot in Hanyi Wus name

changes since v5:
- update copyright
- remove unused defines

Changes since v4:
- give calibration constants more meaningful names (offset, slope)
- Use define instead of 0x00c for register access.

Changes since v3:
- add include/dt-bindings/thermal/mt8173.h for to be able to use sensor names
  in dts files
- fix disabling wrong clock in error path
- remove now unused reset-names property from binding document
- rename MT8173_NUM_BANKS -> MT8173_NUM_ZONES
- rename MT8173_NUM_SENSING_POINTS -> MT8173_NUM_SENSORS_PER_ZONE
- rename struct thermal_zone_device *tz -> struct thermal_zone_device *tzd

Changes since v2:
- sort #includes alphabetically
- Add prefix to register defines
- drop some members from struct mtk_thermal
- simplify raw_to_mcelsius()
- add and use more register bit defines
- use device_reset() instead of devm_reset_control_get()/reset_control_reset()
- misc other stuff

Changes since v1:
- Use "mediatek," prefix for custom properties
- Drop "thermal: consistently use int for temperatures" dependency

-------------

	fan: gpio_fan {
		compatible = "gpio-fan";
		gpios = <&pio 24 0>;
		gpio-fan,speed-map = <0    0
				      4500 1>;
		#cooling-cells = <2>;
	};

	thermal-zones {
			cpu_thermal: cpu_thermal {
			polling-delay-passive = <1000>; /* milliseconds */
			polling-delay = <1000>; /* milliseconds */

			thermal-sensors = <&thermal>;

			trips {
				cpu_passive: cpu_passive {
					temperature = <47000>; /* millicelsius */
					hysteresis = <2000>; /* millicelsius */
					type = "passive";
				};

				cpu_crit {
					temperature = <90000>; /* millicelsius */
					hysteresis = <2000>; /* millicelsius */
					type = "critical";
				};
			};

			cooling-maps {
				map0 {
					trip = <&cpu_passive>;
					cooling-device = <&fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
				};
			};
		};
	};

[PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Sascha Hauer]

This adds the device tree binding documentation for the mediatek thermal
controller found on Mediatek MT8173 and other SoCs.

Signed-off-by: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Reviewed-by: Daniel Kurtz <djkurtz-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
---
 .../bindings/thermal/mediatek-thermal.txt          | 43 ++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/mediatek-thermal.txt

diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
new file mode 100644
index 0000000..81f9a51
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
@@ -0,0 +1,43 @@
+* Mediatek Thermal
+
+This describes the device tree binding for the Mediatek thermal controller
+which measures the on-SoC temperatures. This device does not have its own ADC,
+instead it directly controls the AUXADC via AHB bus accesses. For this reason
+this device needs phandles to the AUXADC. Also it controls a mux in the
+apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
+is also needed.
+
+Required properties:
+- compatible: "mediatek,mt8173-thermal"
+- reg: Address range of the thermal controller
+- interrupts: IRQ for the thermal controller
+- clocks, clock-names: Clocks needed for the thermal controller. required
+                       clocks are:
+		       "therm":	 Main clock needed for register access
+		       "auxadc": The AUXADC clock
+- resets: Reference to the reset controller controlling the thermal controller.
+- mediatek,auxadc: A phandle to the AUXADC which the thermal controller uses
+- mediatek,apmixedsys: A phandle to the APMIXEDSYS controller.
+- #thermal-sensor-cells : Should be 0. See ./thermal.txt for a description.
+
+Optional properties:
+- nvmem-cells: A phandle to the calibration data provided by a nvmem device. If
+               unspecified default values shall be used.
+- nvmem-cell-names: Should be "calibration-data"
+
+Example:
+
+	thermal: thermal@1100b000 {
+		#thermal-sensor-cells = <1>;
+		compatible = "mediatek,mt8173-thermal";
+		reg = <0 0x1100b000 0 0x1000>;
+		interrupts = <0 70 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
+		clock-names = "therm", "auxadc";
+		resets = <&pericfg MT8173_PERI_THERM_SW_RST>;
+		reset-names = "therm";
+		mediatek,auxadc = <&auxadc>;
+		mediatek,apmixedsys = <&apmixedsys>;
+		nvmem-cells = <&thermal_calibration_data>;
+		nvmem-cell-names = "calibration-data";
+	};
-- 
2.6.1

Re: [PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Rob Herring]

On Mon, Nov 09, 2015 at 11:13:31AM +0100, Sascha Hauer wrote:
> This adds the device tree binding documentation for the mediatek thermal
> controller found on Mediatek MT8173 and other SoCs.
> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>

Acked-by: Rob Herring <robh@kernel.org>

> ---
>  .../bindings/thermal/mediatek-thermal.txt          | 43 ++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> 
> diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> new file mode 100644
> index 0000000..81f9a51
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> @@ -0,0 +1,43 @@
> +* Mediatek Thermal
> +
> +This describes the device tree binding for the Mediatek thermal controller
> +which measures the on-SoC temperatures. This device does not have its own ADC,
> +instead it directly controls the AUXADC via AHB bus accesses. For this reason
> +this device needs phandles to the AUXADC. Also it controls a mux in the
> +apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
> +is also needed.
> +
> +Required properties:
> +- compatible: "mediatek,mt8173-thermal"
> +- reg: Address range of the thermal controller
> +- interrupts: IRQ for the thermal controller
> +- clocks, clock-names: Clocks needed for the thermal controller. required
> +                       clocks are:
> +		       "therm":	 Main clock needed for register access
> +		       "auxadc": The AUXADC clock
> +- resets: Reference to the reset controller controlling the thermal controller.
> +- mediatek,auxadc: A phandle to the AUXADC which the thermal controller uses
> +- mediatek,apmixedsys: A phandle to the APMIXEDSYS controller.
> +- #thermal-sensor-cells : Should be 0. See ./thermal.txt for a description.
> +
> +Optional properties:
> +- nvmem-cells: A phandle to the calibration data provided by a nvmem device. If
> +               unspecified default values shall be used.
> +- nvmem-cell-names: Should be "calibration-data"
> +
> +Example:
> +
> +	thermal: thermal@1100b000 {
> +		#thermal-sensor-cells = <1>;
> +		compatible = "mediatek,mt8173-thermal";
> +		reg = <0 0x1100b000 0 0x1000>;
> +		interrupts = <0 70 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
> +		clock-names = "therm", "auxadc";
> +		resets = <&pericfg MT8173_PERI_THERM_SW_RST>;
> +		reset-names = "therm";
> +		mediatek,auxadc = <&auxadc>;
> +		mediatek,apmixedsys = <&apmixedsys>;
> +		nvmem-cells = <&thermal_calibration_data>;
> +		nvmem-cell-names = "calibration-data";
> +	};
> -- 
> 2.6.1
> 

[PATCH v9] Add Mediatek thermal support

[Sascha Hauer]

This series adds support for the thermal sensors included in the
MT8173 SoC. Currently only basic temperature reading is supported
without any interrupt support.

The cpufreq driver for MT8173 is currently under review, so there's no
real cooling device available in mainline. Until this is available the
thermal driver can be tested with the following dts snippet. It creates
a fake gpio fan and a fake trip point which is so low that it can easily
be reached with a "cat /dev/zero > /dev/null" on the command line.

Please review and let me know what's missing to be included in mainline.

changes since v8:
- Add commit description to binding patch
- rebase on v4.3-rc2

changes since v7:
- re-add some used defines removed in v5
- Use MT8173_THERMAL_ZONE_* defines as array indices in static initializers

changes since v6:
- remove dot in Hanyi Wus name

changes since v5:
- update copyright
- remove unused defines

Changes since v4:
- give calibration constants more meaningful names (offset, slope)
- Use define instead of 0x00c for register access.

Changes since v3:
- add include/dt-bindings/thermal/mt8173.h for to be able to use sensor names
  in dts files
- fix disabling wrong clock in error path
- remove now unused reset-names property from binding document
- rename MT8173_NUM_BANKS -> MT8173_NUM_ZONES
- rename MT8173_NUM_SENSING_POINTS -> MT8173_NUM_SENSORS_PER_ZONE
- rename struct thermal_zone_device *tz -> struct thermal_zone_device *tzd

Changes since v2:
- sort #includes alphabetically
- Add prefix to register defines
- drop some members from struct mtk_thermal
- simplify raw_to_mcelsius()
- add and use more register bit defines
- use device_reset() instead of devm_reset_control_get()/reset_control_reset()
- misc other stuff

Changes since v1:
- Use "mediatek," prefix for custom properties
- Drop "thermal: consistently use int for temperatures" dependency

Sascha

        fan: gpio_fan {
                compatible = "gpio-fan";
                gpios = <&pio 24 0>;
                gpio-fan,speed-map = <0    0
                                      4500 1>;
                #cooling-cells = <2>;
        };

        thermal-zones {
                cpu_thermal: cpu_thermal {
                        polling-delay-passive = <1000>; /* milliseconds */
                        polling-delay = <1000>; /* milliseconds */

                        thermal-sensors = <&thermal 0>;

                        trips {
                                cpu_passive: cpu_passive {
                                        temperature = <47000>; /* millicelsius */
                                        hysteresis = <2000>; /* millicelsius */
                                        type = "passive";
                                };

                                cpu_crit {
                                        temperature = <90000>; /* millicelsius */
                                        hysteresis = <2000>; /* millicelsius */
                                        type = "critical";
                                };
                        };

                        cooling-maps {
                                map0 {
                                        trip = <&cpu_passive>;
                                        cooling-device = <&fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
                                };
                        };
                };
        };
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commit de42d22304311e6d5d711b85e66a281fe1035ba2
Author: Sascha Hauer <s.hauer@pengutronix.de>
Date:   Tue May 12 09:22:29 2015 +0200

    ARM64: dts: mt8173: Add thermal/auxadc device nodes
    
    Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
    Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>

diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
index d18ee42..3b18f37 100644
--- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
@@ -277,6 +277,11 @@
 				(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
 		};
 
+		auxadc: auxadc@11001000 {
+			compatible = "mediatek,mt8173-auxadc";
+			reg = <0 0x11001000 0 0x1000>;
+		};
+
 		uart0: serial@11002000 {
 			compatible = "mediatek,mt8173-uart",
 				     "mediatek,mt6577-uart";
@@ -487,6 +492,18 @@
 			clock-names = "source", "hclk";
 			status = "disabled";
 		};
+
+		thermal: thermal@1100b000 {
+			#thermal-sensor-cells = <1>;
+			compatible = "mediatek,mt8173-thermal";
+			reg = <0 0x1100b000 0 0x1000>;
+			interrupts = <0 70 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
+			clock-names = "therm", "auxadc";
+			resets = <&pericfg MT8173_PERI_THERM_SW_RST>;
+			mediatek,auxadc = <&auxadc>;
+			mediatek,apmixedsys = <&apmixedsys>;
+		};
 	};
 };
 

[PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Sascha Hauer]

This adds the device tree binding documentation for the mediatek thermal
controller found on Mediatek MT8173 and other SoCs.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
---
 .../bindings/thermal/mediatek-thermal.txt          | 38 ++++++++++++++++++++++
 include/dt-bindings/thermal/mt8173.h               | 13 ++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
 create mode 100644 include/dt-bindings/thermal/mt8173.h

diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
new file mode 100644
index 0000000..1697375
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
@@ -0,0 +1,38 @@
+* Mediatek Thermal
+
+This describes the device tree binding for the Mediatek thermal controller
+which measures the on-SoC temperatures. This device does not have its own ADC,
+instead it directly controls the AUXADC via AHB bus accesses. For this reason
+this device needs phandles to the AUXADC. Also it controls a mux in the
+apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
+is also needed.
+
+Required properties:
+- compatible: "mediatek,mt8173-thermal"
+- reg: Address range of the thermal controller
+- interrupts: IRQ for the thermal controller
+- clocks, clock-names: Clocks needed for the thermal controller. required
+                       clocks are:
+		       "therm":	 Main clock needed for register access
+		       "auxadc": The AUXADC clock
+- resets: Reference to the reset controller controlling the thermal controller.
+- mediatek,auxadc: A phandle to the AUXADC which the thermal controller uses
+- mediatek,apmixedsys: A phandle to the APMIXEDSYS controller.
+- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description. See
+			  include/dt-bindings/thermal/mt8173.h for valid sensor
+			  numbers.
+
+Example:
+
+	thermal: thermal@1100b000 {
+		#thermal-sensor-cells = <1>;
+		compatible = "mediatek,mt8173-thermal";
+		reg = <0 0x1100b000 0 0x1000>;
+		interrupts = <0 70 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
+		clock-names = "therm", "auxadc";
+		resets = <&pericfg MT8173_PERI_THERM_SW_RST>;
+		reset-names = "therm";
+		mediatek,auxadc = <&auxadc>;
+		mediatek,apmixedsys = <&apmixedsys>;
+	};
diff --git a/include/dt-bindings/thermal/mt8173.h b/include/dt-bindings/thermal/mt8173.h
new file mode 100644
index 0000000..692e74c
--- /dev/null
+++ b/include/dt-bindings/thermal/mt8173.h
@@ -0,0 +1,13 @@
+/*
+ * This header provides constants for mediatek,mt8173-thermal
+ */
+
+#ifndef _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
+#define _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
+
+#define MT8173_THERMAL_ZONE_CA53	0
+#define MT8173_THERMAL_ZONE_CA57	1
+#define MT8173_THERMAL_ZONE_GPU		2
+#define MT8173_THERMAL_ZONE_CORE	3
+
+#endif /* _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H */
-- 
2.5.1

[PATCH v8] Add Mediatek thermal support

[Sascha Hauer]

This series adds support for the thermal sensors included in the
MT8173 SoC. Currently only basic temperature reading is supported
without any interrupt support.

The cpufreq driver for MT8173 is currently under review, so there's no
real cooling device available in mainline. Until this is available the
thermal driver can be tested with the following dts snippet. It creates
a fake gpio fan and a fake trip point which is so low that it can easily
be reached with a "cat /dev/zero > /dev/null" on the command line.

Please review and let me know what's missing to be included in mainline.

changes since v7:
- re-add some used defines removed in v5
- Use MT8173_THERMAL_ZONE_* defines as array indices in static initializers

changes since v6:
- remove dot in Hanyi Wus name

changes since v5:
- update copyright
- remove unused defines

Changes since v4:
- give calibration constants more meaningful names (offset, slope)
- Use define instead of 0x00c for register access.

Changes since v3:
- add include/dt-bindings/thermal/mt8173.h for to be able to use sensor names
  in dts files
- fix disabling wrong clock in error path
- remove now unused reset-names property from binding document
- rename MT8173_NUM_BANKS -> MT8173_NUM_ZONES
- rename MT8173_NUM_SENSING_POINTS -> MT8173_NUM_SENSORS_PER_ZONE
- rename struct thermal_zone_device *tz -> struct thermal_zone_device *tzd

Changes since v2:
- sort #includes alphabetically
- Add prefix to register defines
- drop some members from struct mtk_thermal
- simplify raw_to_mcelsius()
- add and use more register bit defines
- use device_reset() instead of devm_reset_control_get()/reset_control_reset()
- misc other stuff

Changes since v1:
- Use "mediatek," prefix for custom properties
- Drop "thermal: consistently use int for temperatures" dependency

Sascha

        fan: gpio_fan {
                compatible = "gpio-fan";
                gpios = <&pio 24 0>;
                gpio-fan,speed-map = <0    0
                                      4500 1>;
                #cooling-cells = <2>;
        };

        thermal-zones {
                cpu_thermal: cpu_thermal {
                        polling-delay-passive = <1000>; /* milliseconds */
                        polling-delay = <1000>; /* milliseconds */

                        thermal-sensors = <&thermal 0>;

                        trips {
                                cpu_passive: cpu_passive {
                                        temperature = <47000>; /* millicelsius */
                                        hysteresis = <2000>; /* millicelsius */
                                        type = "passive";
                                };

                                cpu_crit {
                                        temperature = <90000>; /* millicelsius */
                                        hysteresis = <2000>; /* millicelsius */
                                        type = "critical";
                                };
                        };

                        cooling-maps {
                                map0 {
                                        trip = <&cpu_passive>;
                                        cooling-device = <&fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
                                };
                        };
                };
        };

[PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Sascha Hauer]

Signed-off-by: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Reviewed-by: Daniel Kurtz <djkurtz-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
---
 .../bindings/thermal/mediatek-thermal.txt          | 38 ++++++++++++++++++++++
 include/dt-bindings/thermal/mt8173.h               | 13 ++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
 create mode 100644 include/dt-bindings/thermal/mt8173.h

diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
new file mode 100644
index 0000000..1697375
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
@@ -0,0 +1,38 @@
+* Mediatek Thermal
+
+This describes the device tree binding for the Mediatek thermal controller
+which measures the on-SoC temperatures. This device does not have its own ADC,
+instead it directly controls the AUXADC via AHB bus accesses. For this reason
+this device needs phandles to the AUXADC. Also it controls a mux in the
+apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
+is also needed.
+
+Required properties:
+- compatible: "mediatek,mt8173-thermal"
+- reg: Address range of the thermal controller
+- interrupts: IRQ for the thermal controller
+- clocks, clock-names: Clocks needed for the thermal controller. required
+                       clocks are:
+		       "therm":	 Main clock needed for register access
+		       "auxadc": The AUXADC clock
+- resets: Reference to the reset controller controlling the thermal controller.
+- mediatek,auxadc: A phandle to the AUXADC which the thermal controller uses
+- mediatek,apmixedsys: A phandle to the APMIXEDSYS controller.
+- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description. See
+			  include/dt-bindings/thermal/mt8173.h for valid sensor
+			  numbers.
+
+Example:
+
+	thermal: thermal@1100b000 {
+		#thermal-sensor-cells = <1>;
+		compatible = "mediatek,mt8173-thermal";
+		reg = <0 0x1100b000 0 0x1000>;
+		interrupts = <0 70 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
+		clock-names = "therm", "auxadc";
+		resets = <&pericfg MT8173_PERI_THERM_SW_RST>;
+		reset-names = "therm";
+		mediatek,auxadc = <&auxadc>;
+		mediatek,apmixedsys = <&apmixedsys>;
+	};
diff --git a/include/dt-bindings/thermal/mt8173.h b/include/dt-bindings/thermal/mt8173.h
new file mode 100644
index 0000000..692e74c
--- /dev/null
+++ b/include/dt-bindings/thermal/mt8173.h
@@ -0,0 +1,13 @@
+/*
+ * This header provides constants for mediatek,mt8173-thermal
+ */
+
+#ifndef _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
+#define _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
+
+#define MT8173_THERMAL_ZONE_CA53	0
+#define MT8173_THERMAL_ZONE_CA57	1
+#define MT8173_THERMAL_ZONE_GPU		2
+#define MT8173_THERMAL_ZONE_CORE	3
+
+#endif /* _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H */
-- 
2.5.0

Re: [PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Sascha Hauer]

On Mon, Aug 31, 2015 at 09:34:04AM +0200, Sascha Hauer wrote:
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>

Uh, still forgot the commit log. Will add something like:

This adds the device tree binding documentation for the mediatek thermal
controller found on Mediatek MT8173 and other SoCs.

Sascha

> ---
>  .../bindings/thermal/mediatek-thermal.txt          | 38 ++++++++++++++++++++++
>  include/dt-bindings/thermal/mt8173.h               | 13 ++++++++
>  2 files changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
>  create mode 100644 include/dt-bindings/thermal/mt8173.h
> 
> diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> new file mode 100644
> index 0000000..1697375
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> @@ -0,0 +1,38 @@
> +* Mediatek Thermal
> +
> +This describes the device tree binding for the Mediatek thermal controller
> +which measures the on-SoC temperatures. This device does not have its own ADC,
> +instead it directly controls the AUXADC via AHB bus accesses. For this reason
> +this device needs phandles to the AUXADC. Also it controls a mux in the
> +apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
> +is also needed.
> +
> +Required properties:
> +- compatible: "mediatek,mt8173-thermal"
> +- reg: Address range of the thermal controller
> +- interrupts: IRQ for the thermal controller
> +- clocks, clock-names: Clocks needed for the thermal controller. required
> +                       clocks are:
> +		       "therm":	 Main clock needed for register access
> +		       "auxadc": The AUXADC clock
> +- resets: Reference to the reset controller controlling the thermal controller.
> +- mediatek,auxadc: A phandle to the AUXADC which the thermal controller uses
> +- mediatek,apmixedsys: A phandle to the APMIXEDSYS controller.
> +- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description. See
> +			  include/dt-bindings/thermal/mt8173.h for valid sensor
> +			  numbers.
> +
> +Example:
> +
> +	thermal: thermal@1100b000 {
> +		#thermal-sensor-cells = <1>;
> +		compatible = "mediatek,mt8173-thermal";
> +		reg = <0 0x1100b000 0 0x1000>;
> +		interrupts = <0 70 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
> +		clock-names = "therm", "auxadc";
> +		resets = <&pericfg MT8173_PERI_THERM_SW_RST>;
> +		reset-names = "therm";
> +		mediatek,auxadc = <&auxadc>;
> +		mediatek,apmixedsys = <&apmixedsys>;
> +	};
> diff --git a/include/dt-bindings/thermal/mt8173.h b/include/dt-bindings/thermal/mt8173.h
> new file mode 100644
> index 0000000..692e74c
> --- /dev/null
> +++ b/include/dt-bindings/thermal/mt8173.h
> @@ -0,0 +1,13 @@
> +/*
> + * This header provides constants for mediatek,mt8173-thermal
> + */
> +
> +#ifndef _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
> +#define _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
> +
> +#define MT8173_THERMAL_ZONE_CA53	0
> +#define MT8173_THERMAL_ZONE_CA57	1
> +#define MT8173_THERMAL_ZONE_GPU		2
> +#define MT8173_THERMAL_ZONE_CORE	3
> +
> +#endif /* _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H */
> -- 
> 2.5.0
> 
> 

-- 
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Re: [PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Punit Agrawal]

[ + device tree folks ]

Hi Sascha,

When introducing a new binding, it is a good idea to get reviews from
the device tree maintainers. I've added a few folks here. Please keep
them in the loop for future postings.

Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> writes:

> Signed-off-by: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
> Reviewed-by: Daniel Kurtz <djkurtz-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>

Please add a commit log.

> ---
>  .../bindings/thermal/mediatek-thermal.txt          | 38 ++++++++++++++++++++++
>  include/dt-bindings/thermal/mt8173.h               | 13 ++++++++
>  2 files changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
>  create mode 100644 include/dt-bindings/thermal/mt8173.h
>
> diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> new file mode 100644
> index 0000000..1697375
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> @@ -0,0 +1,38 @@
> +* Mediatek Thermal
> +
> +This describes the device tree binding for the Mediatek thermal controller
> +which measures the on-SoC temperatures. This device does not have its own ADC,
> +instead it directly controls the AUXADC via AHB bus accesses. For this reason
> +this device needs phandles to the AUXADC. Also it controls a mux in the
> +apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
> +is also needed.
> +
> +Required properties:
> +- compatible: "mediatek,mt8173-thermal"
> +- reg: Address range of the thermal controller
> +- interrupts: IRQ for the thermal controller
> +- clocks, clock-names: Clocks needed for the thermal controller. required
> +                       clocks are:
> +		       "therm":	 Main clock needed for register access
> +		       "auxadc": The AUXADC clock
> +- resets: Reference to the reset controller controlling the thermal controller.
> +- mediatek,auxadc: A phandle to the AUXADC which the thermal controller uses
> +- mediatek,apmixedsys: A phandle to the APMIXEDSYS controller.
> +- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description. See
> +			  include/dt-bindings/thermal/mt8173.h for valid sensor
> +			  numbers.
> +
> +Example:
> +
> +	thermal: thermal@1100b000 {
> +		#thermal-sensor-cells = <1>;
> +		compatible = "mediatek,mt8173-thermal";
> +		reg = <0 0x1100b000 0 0x1000>;
> +		interrupts = <0 70 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
> +		clock-names = "therm", "auxadc";
> +		resets = <&pericfg MT8173_PERI_THERM_SW_RST>;
> +		reset-names = "therm";
> +		mediatek,auxadc = <&auxadc>;
> +		mediatek,apmixedsys = <&apmixedsys>;
> +	};
> diff --git a/include/dt-bindings/thermal/mt8173.h b/include/dt-bindings/thermal/mt8173.h
> new file mode 100644
> index 0000000..692e74c
> --- /dev/null
> +++ b/include/dt-bindings/thermal/mt8173.h
> @@ -0,0 +1,13 @@
> +/*
> + * This header provides constants for mediatek,mt8173-thermal
> + */
> +
> +#ifndef _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
> +#define _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
> +
> +#define MT8173_THERMAL_ZONE_CA53	0
> +#define MT8173_THERMAL_ZONE_CA57	1
> +#define MT8173_THERMAL_ZONE_GPU		2
> +#define MT8173_THERMAL_ZONE_CORE	3
> +
> +#endif /* _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H */

The constants in this include are not used in the patchset. Please drop
this hunk and introduce it when you use it.

Thanks,
Punit
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Re: [PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Daniel Kurtz]

On Thu, Aug 27, 2015 at 7:49 PM, Punit Agrawal <punit.agrawal@arm.com> wrote:
> [ + device tree folks ]
>
> Hi Sascha,
>
> When introducing a new binding, it is a good idea to get reviews from
> the device tree maintainers. I've added a few folks here. Please keep
> them in the loop for future postings.
>
> Sascha Hauer <s.hauer@pengutronix.de> writes:
>
>> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
>> Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
>
> Please add a commit log.
>
>> ---
>>  .../bindings/thermal/mediatek-thermal.txt          | 38 ++++++++++++++++++++++
>>  include/dt-bindings/thermal/mt8173.h               | 13 ++++++++
>>  2 files changed, 51 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
>>  create mode 100644 include/dt-bindings/thermal/mt8173.h
>>
>> diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
>> new file mode 100644
>> index 0000000..1697375
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
>> @@ -0,0 +1,38 @@
>> +* Mediatek Thermal
>> +
>> +This describes the device tree binding for the Mediatek thermal controller
>> +which measures the on-SoC temperatures. This device does not have its own ADC,
>> +instead it directly controls the AUXADC via AHB bus accesses. For this reason
>> +this device needs phandles to the AUXADC. Also it controls a mux in the
>> +apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
>> +is also needed.
>> +
>> +Required properties:
>> +- compatible: "mediatek,mt8173-thermal"
>> +- reg: Address range of the thermal controller
>> +- interrupts: IRQ for the thermal controller
>> +- clocks, clock-names: Clocks needed for the thermal controller. required
>> +                       clocks are:
>> +                    "therm":  Main clock needed for register access
>> +                    "auxadc": The AUXADC clock
>> +- resets: Reference to the reset controller controlling the thermal controller.
>> +- mediatek,auxadc: A phandle to the AUXADC which the thermal controller uses
>> +- mediatek,apmixedsys: A phandle to the APMIXEDSYS controller.
>> +- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description. See
>> +                       include/dt-bindings/thermal/mt8173.h for valid sensor
>> +                       numbers.
>> +
>> +Example:
>> +
>> +     thermal: thermal@1100b000 {
>> +             #thermal-sensor-cells = <1>;
>> +             compatible = "mediatek,mt8173-thermal";
>> +             reg = <0 0x1100b000 0 0x1000>;
>> +             interrupts = <0 70 IRQ_TYPE_LEVEL_LOW>;
>> +             clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
>> +             clock-names = "therm", "auxadc";
>> +             resets = <&pericfg MT8173_PERI_THERM_SW_RST>;
>> +             reset-names = "therm";
>> +             mediatek,auxadc = <&auxadc>;
>> +             mediatek,apmixedsys = <&apmixedsys>;
>> +     };
>> diff --git a/include/dt-bindings/thermal/mt8173.h b/include/dt-bindings/thermal/mt8173.h
>> new file mode 100644
>> index 0000000..692e74c
>> --- /dev/null
>> +++ b/include/dt-bindings/thermal/mt8173.h
>> @@ -0,0 +1,13 @@
>> +/*
>> + * This header provides constants for mediatek,mt8173-thermal
>> + */
>> +
>> +#ifndef _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
>> +#define _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
>> +
>> +#define MT8173_THERMAL_ZONE_CA53     0
>> +#define MT8173_THERMAL_ZONE_CA57     1
>> +#define MT8173_THERMAL_ZONE_GPU              2
>> +#define MT8173_THERMAL_ZONE_CORE     3
>> +
>> +#endif /* _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H */
>
> The constants in this include are not used in the patchset. Please drop
> this hunk and introduce it when you use it.

These constants are part of the devicetree ABI, and I believe they
should be included with the binding.
To make this more concrete, I think these constants could be used as
array indices when initializing the corresponding banks of "bank_data"
in patch 2 (like you do when initializing scp_domain_data in the
scpsys driver).

-Dan

>
> Thanks,
> Punit

Re: [PATCH 1/3] dt-bindings: thermal: Add binding document for Mediatek thermal controller

[Sascha Hauer]

On Fri, Aug 28, 2015 at 10:23:15AM +0800, Daniel Kurtz wrote:
> On Thu, Aug 27, 2015 at 7:49 PM, Punit Agrawal <punit.agrawal@arm.com> wrote:
> > [ + device tree folks ]
> >
> > Hi Sascha,
> >
> > When introducing a new binding, it is a good idea to get reviews from
> > the device tree maintainers. I've added a few folks here. Please keep
> > them in the loop for future postings.
> >
> > Sascha Hauer <s.hauer@pengutronix.de> writes:
> >
> >> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> >> Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
> >
> > Please add a commit log.
> >
> >> ---
> >>  .../bindings/thermal/mediatek-thermal.txt          | 38 ++++++++++++++++++++++
> >>  include/dt-bindings/thermal/mt8173.h               | 13 ++++++++
> >>  2 files changed, 51 insertions(+)
> >>  create mode 100644 Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> >>  create mode 100644 include/dt-bindings/thermal/mt8173.h
> >>
> >> diff --git a/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> >> new file mode 100644
> >> index 0000000..1697375
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
> >> @@ -0,0 +1,38 @@
> >> +* Mediatek Thermal
> >> +
> >> +This describes the device tree binding for the Mediatek thermal controller
> >> +which measures the on-SoC temperatures. This device does not have its own ADC,
> >> +instead it directly controls the AUXADC via AHB bus accesses. For this reason
> >> +this device needs phandles to the AUXADC. Also it controls a mux in the
> >> +apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS
> >> +is also needed.
> >> +
> >> +Required properties:
> >> +- compatible: "mediatek,mt8173-thermal"
> >> +- reg: Address range of the thermal controller
> >> +- interrupts: IRQ for the thermal controller
> >> +- clocks, clock-names: Clocks needed for the thermal controller. required
> >> +                       clocks are:
> >> +                    "therm":  Main clock needed for register access
> >> +                    "auxadc": The AUXADC clock
> >> +- resets: Reference to the reset controller controlling the thermal controller.
> >> +- mediatek,auxadc: A phandle to the AUXADC which the thermal controller uses
> >> +- mediatek,apmixedsys: A phandle to the APMIXEDSYS controller.
> >> +- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description. See
> >> +                       include/dt-bindings/thermal/mt8173.h for valid sensor
> >> +                       numbers.
> >> +
> >> +Example:
> >> +
> >> +     thermal: thermal@1100b000 {
> >> +             #thermal-sensor-cells = <1>;
> >> +             compatible = "mediatek,mt8173-thermal";
> >> +             reg = <0 0x1100b000 0 0x1000>;
> >> +             interrupts = <0 70 IRQ_TYPE_LEVEL_LOW>;
> >> +             clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
> >> +             clock-names = "therm", "auxadc";
> >> +             resets = <&pericfg MT8173_PERI_THERM_SW_RST>;
> >> +             reset-names = "therm";
> >> +             mediatek,auxadc = <&auxadc>;
> >> +             mediatek,apmixedsys = <&apmixedsys>;
> >> +     };
> >> diff --git a/include/dt-bindings/thermal/mt8173.h b/include/dt-bindings/thermal/mt8173.h
> >> new file mode 100644
> >> index 0000000..692e74c
> >> --- /dev/null
> >> +++ b/include/dt-bindings/thermal/mt8173.h
> >> @@ -0,0 +1,13 @@
> >> +/*
> >> + * This header provides constants for mediatek,mt8173-thermal
> >> + */
> >> +
> >> +#ifndef _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
> >> +#define _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H
> >> +
> >> +#define MT8173_THERMAL_ZONE_CA53     0
> >> +#define MT8173_THERMAL_ZONE_CA57     1
> >> +#define MT8173_THERMAL_ZONE_GPU              2
> >> +#define MT8173_THERMAL_ZONE_CORE     3
> >> +
> >> +#endif /* _DT_BINDINGS_THERMAL_MEDIATEK_MT8173_H */
> >
> > The constants in this include are not used in the patchset. Please drop
> > this hunk and introduce it when you use it.
> 
> These constants are part of the devicetree ABI, and I believe they
> should be included with the binding.

Yes, that's what I was told for other series.

> To make this more concrete, I think these constants could be used as
> array indices when initializing the corresponding banks of "bank_data"
> in patch 2 (like you do when initializing scp_domain_data in the
> scpsys driver).

Good idea, will do that in the next round.

Sascha

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