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Code

thermal: Add Mediatek thermal driver for mt2701.

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This patch adds support for mt2701 chip to mtk_thermal,
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>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
dawei.chien@mediatek.com 2016-08-18 11:50:52 +08:00 committed by Zhang Rui
parent 77d6e7212c
commit b7cf005373
1 changed files with 152 additions and 63 deletions
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215
drivers/thermal/mtk_thermal.c
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@ -2,6 +2,7 @@
* Copyright (c) 2015 MediaTek Inc. * Copyright (c) 2015 MediaTek Inc.
* Author: Hanyi Wu <hanyi.wu@mediatek.com> * Author: Hanyi Wu <hanyi.wu@mediatek.com>
* Sascha Hauer <s.hauer@pengutronix.de> * Sascha Hauer <s.hauer@pengutronix.de>
* Dawei Chien <dawei.chien@mediatek.com>
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License version 2 as
@ -21,6 +22,7 @@
#include <linux/nvmem-consumer.h> #include <linux/nvmem-consumer.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_address.h> #include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/io.h> #include <linux/io.h>
@ -88,6 +90,7 @@
#define TEMP_ADCVALIDMASK_VALID_HIGH BIT(5) #define TEMP_ADCVALIDMASK_VALID_HIGH BIT(5)
#define TEMP_ADCVALIDMASK_VALID_POS(bit) (bit) #define TEMP_ADCVALIDMASK_VALID_POS(bit) (bit)
/* MT8173 thermal sensors */
#define MT8173_TS1 0 #define MT8173_TS1 0
#define MT8173_TS2 1 #define MT8173_TS2 1
#define MT8173_TS3 2 #define MT8173_TS3 2
@ -106,7 +109,12 @@
/* The number of sensing points per bank */ /* The number of sensing points per bank */
#define MT8173_NUM_SENSORS_PER_ZONE 4 #define MT8173_NUM_SENSORS_PER_ZONE 4
/* Layout of the fuses providing the calibration data */ /*
* Layout of the fuses providing the calibration data
* These macros could be used for both MT8173 and MT2701.
* MT8173 has five sensors and need five VTS calibration data,
* and MT2701 has three sensors and need three VTS calibration data.
*/
#define MT8173_CALIB_BUF0_VALID BIT(0) #define MT8173_CALIB_BUF0_VALID BIT(0)
#define MT8173_CALIB_BUF1_ADC_GE(x) (((x) >> 22) & 0x3ff) #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_TS1(x) (((x) >> 17) & 0x1ff)
@ -117,24 +125,50 @@
#define MT8173_CALIB_BUF0_DEGC_CALI(x) (((x) >> 1) & 0x3f) #define MT8173_CALIB_BUF0_DEGC_CALI(x) (((x) >> 1) & 0x3f)
#define MT8173_CALIB_BUF0_O_SLOPE(x) (((x) >> 26) & 0x3f) #define MT8173_CALIB_BUF0_O_SLOPE(x) (((x) >> 26) & 0x3f)
/* 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
/* The total number of temperature sensors in the MT2701 */
#define MT2701_NUM_SENSORS 3
#define THERMAL_NAME "mtk-thermal" #define THERMAL_NAME "mtk-thermal"
/* The number of sensing points per bank */
#define MT2701_NUM_SENSORS_PER_ZONE 3
struct mtk_thermal; struct mtk_thermal;
struct thermal_bank_cfg {
unsigned int num_sensors;
const int *sensors;
};
struct mtk_thermal_bank { struct mtk_thermal_bank {
struct mtk_thermal *mt; struct mtk_thermal *mt;
int id; int id;
}; };
struct mtk_thermal_data {
s32 num_banks;
s32 num_sensors;
s32 auxadc_channel;
const int *sensor_mux_values;
const int *msr;
const int *adcpnp;
struct thermal_bank_cfg bank_data[];
};
struct mtk_thermal { struct mtk_thermal {
struct device *dev; struct device *dev;
void __iomem *thermal_base; void __iomem *thermal_base;
struct clk *clk_peri_therm; struct clk *clk_peri_therm;
struct clk *clk_auxadc; struct clk *clk_auxadc;
struct mtk_thermal_bank banks[MT8173_NUM_ZONES];
/* lock: for getting and putting banks */ /* lock: for getting and putting banks */
struct mutex lock; struct mutex lock;
@ -144,16 +178,44 @@ struct mtk_thermal {
s32 o_slope; s32 o_slope;
s32 vts[MT8173_NUM_SENSORS]; s32 vts[MT8173_NUM_SENSORS];
const struct mtk_thermal_data *conf;
struct mtk_thermal_bank banks[];
}; };
struct mtk_thermal_bank_cfg { /* MT8173 thermal sensor data */
unsigned int num_sensors; const int mt8173_bank_data[MT8173_NUM_ZONES][3] = {
unsigned int sensors[MT8173_NUM_SENSORS_PER_ZONE]; { MT8173_TS2, MT8173_TS3 },
{ MT8173_TS2, MT8173_TS4 },
{ MT8173_TS1, MT8173_TS2, MT8173_TSABB },
{ MT8173_TS2 },
}; };
static const int sensor_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 }; const int mt8173_msr[MT8173_NUM_SENSORS_PER_ZONE] = {
TEMP_MSR0, TEMP_MSR1, TEMP_MSR2, TEMP_MSR2
};
/* const int mt8173_adcpnp[MT8173_NUM_SENSORS_PER_ZONE] = {
TEMP_ADCPNP0, TEMP_ADCPNP1, TEMP_ADCPNP2, TEMP_ADCPNP3
};
const int mt8173_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
/* MT2701 thermal sensor data */
const int mt2701_bank_data[MT2701_NUM_SENSORS] = {
MT2701_TS1, MT2701_TS2, MT2701_TSABB
};
const int mt2701_msr[MT2701_NUM_SENSORS_PER_ZONE] = {
TEMP_MSR0, TEMP_MSR1, TEMP_MSR2
};
const int mt2701_adcpnp[MT2701_NUM_SENSORS_PER_ZONE] = {
TEMP_ADCPNP0, TEMP_ADCPNP1, TEMP_ADCPNP2
};
const int mt2701_mux_values[MT2701_NUM_SENSORS] = { 0, 1, 16 };
/**
* The MT8173 thermal controller has four banks. Each bank can read up to * The MT8173 thermal controller has four banks. Each bank can read up to
* four temperature sensors simultaneously. The MT8173 has a total of 5 * four temperature sensors simultaneously. The MT8173 has a total of 5
* temperature sensors. We use each bank to measure a certain area of the * temperature sensors. We use each bank to measure a certain area of the
@ -166,42 +228,53 @@ 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 * data, and this indeed needs the temperatures of the individual banks
* for making better decisions. * for making better decisions.
*/ */
static const struct mtk_thermal_bank_cfg bank_data[] = { static const struct mtk_thermal_data mt8173_thermal_data = {
{ .auxadc_channel = MT8173_TEMP_AUXADC_CHANNEL,
.num_sensors = 2, .num_banks = MT8173_NUM_ZONES,
.sensors = { MT8173_TS2, MT8173_TS3 }, .num_sensors = MT8173_NUM_SENSORS,
}, { .bank_data = {
.num_sensors = 2, {
.sensors = { MT8173_TS2, MT8173_TS4 }, .num_sensors = 2,
}, { .sensors = mt8173_bank_data[0],
.num_sensors = 3, }, {
.sensors = { MT8173_TS1, MT8173_TS2, MT8173_TSABB }, .num_sensors = 2,
}, { .sensors = mt8173_bank_data[1],
.num_sensors = 1, }, {
.sensors = { MT8173_TS2 }, .num_sensors = 3,
.sensors = mt8173_bank_data[2],
}, {
.num_sensors = 1,
.sensors = mt8173_bank_data[3],
},
}, },
.msr = mt8173_msr,
.adcpnp = mt8173_adcpnp,
.sensor_mux_values = mt8173_mux_values,
}; };
struct mtk_thermal_sense_point { /**
int msr; * The MT2701 thermal controller has one bank, which can read up to
int adcpnp; * three temperature sensors simultaneously. The MT2701 has a total of 3
}; * temperature sensors.
*
static const struct mtk_thermal_sense_point * The thermal core only gets the maximum temperature of this one bank,
sensing_points[MT8173_NUM_SENSORS_PER_ZONE] = { * so the bank concept wouldn't be necessary here. However, the SVS (Smart
{ * Voltage Scaling) unit makes its decisions based on the same bank
.msr = TEMP_MSR0, * data.
.adcpnp = TEMP_ADCPNP0, */
}, { static const struct mtk_thermal_data mt2701_thermal_data = {
.msr = TEMP_MSR1, .auxadc_channel = MT2701_TEMP_AUXADC_CHANNEL,
.adcpnp = TEMP_ADCPNP1, .num_banks = 1,
}, { .num_sensors = MT2701_NUM_SENSORS,
.msr = TEMP_MSR2, .bank_data = {
.adcpnp = TEMP_ADCPNP2, {
}, { .num_sensors = 3,
.msr = TEMP_MSR3, .sensors = mt2701_bank_data,
.adcpnp = TEMP_ADCPNP3, },
}, },
.msr = mt2701_msr,
.adcpnp = mt2701_adcpnp,
.sensor_mux_values = mt2701_mux_values,
}; };
/** /**
@ -270,13 +343,16 @@ static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank) static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
{ {
struct mtk_thermal *mt = bank->mt; struct mtk_thermal *mt = bank->mt;
const struct mtk_thermal_data *conf = mt->conf;
int i, temp = INT_MIN, max = INT_MIN; int i, temp = INT_MIN, max = INT_MIN;
u32 raw; u32 raw;
for (i = 0; i < bank_data[bank->id].num_sensors; i++) { for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
raw = readl(mt->thermal_base + sensing_points[i].msr); raw = readl(mt->thermal_base + conf->msr[i]);
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 * The first read of a sensor often contains very high bogus
@ -299,7 +375,7 @@ static int mtk_read_temp(void *data, int *temperature)
int i; int i;
int tempmax = INT_MIN; 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]; struct mtk_thermal_bank *bank = &mt->banks[i];
mtk_thermal_get_bank(bank); mtk_thermal_get_bank(bank);
@ -322,7 +398,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
u32 apmixed_phys_base, u32 auxadc_phys_base) u32 apmixed_phys_base, u32 auxadc_phys_base)
{ {
struct mtk_thermal_bank *bank = &mt->banks[num]; 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; int i;
bank->id = num; bank->id = num;
@ -368,7 +444,7 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
* this value will be stored to TEMP_PNPMUXADDR (TEMP_SPARE0) * this value will be stored to TEMP_PNPMUXADDR (TEMP_SPARE0)
* automatically by hw * 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 */ /* AHB address for auxadc mux selection */
writel(auxadc_phys_base + AUXADC_CON1_CLR_V, writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
@ -379,18 +455,18 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
mt->thermal_base + TEMP_PNPMUXADDR); mt->thermal_base + TEMP_PNPMUXADDR);
/* AHB value for auxadc enable */ /* 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) */ /* AHB address for auxadc enable (channel 0 immediate mode selected) */
writel(auxadc_phys_base + AUXADC_CON1_SET_V, writel(auxadc_phys_base + AUXADC_CON1_SET_V,
mt->thermal_base + TEMP_ADCENADDR); mt->thermal_base + TEMP_ADCENADDR);
/* AHB address for auxadc valid bit */ /* 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); mt->thermal_base + TEMP_ADCVALIDADDR);
/* AHB address for auxadc voltage output */ /* 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); mt->thermal_base + TEMP_ADCVOLTADDR);
/* read valid & voltage are at the same register */ /* read valid & voltage are at the same register */
@ -407,11 +483,12 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
writel(TEMP_ADCWRITECTRL_ADC_MUX_WRITE, writel(TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
mt->thermal_base + TEMP_ADCWRITECTRL); mt->thermal_base + TEMP_ADCWRITECTRL);
for (i = 0; i < cfg->num_sensors; i++) for (i = 0; i < conf->bank_data[num].num_sensors; i++)
writel(sensor_mux_values[cfg->sensors[i]], writel(conf->sensor_mux_values[conf->bank_data[num].sensors[i]],
mt->thermal_base + sensing_points[i].adcpnp); mt->thermal_base + conf->adcpnp[i]);
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 | writel(TEMP_ADCWRITECTRL_ADC_PNP_WRITE |
TEMP_ADCWRITECTRL_ADC_MUX_WRITE, TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
@ -442,7 +519,7 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
/* Start with default values */ /* Start with default values */
mt->adc_ge = 512; 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->vts[i] = 260;
mt->degc_cali = 40; mt->degc_cali = 40;
mt->o_slope = 0; mt->o_slope = 0;
@ -486,18 +563,36 @@ out:
return ret; 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) static int mtk_thermal_probe(struct platform_device *pdev)
{ {
int ret, i; int ret, i;
struct device_node *auxadc, *apmixedsys, *np = pdev->dev.of_node; struct device_node *auxadc, *apmixedsys, *np = pdev->dev.of_node;
struct mtk_thermal *mt; struct mtk_thermal *mt;
struct resource *res; struct resource *res;
const struct of_device_id *of_id;
u64 auxadc_phys_base, apmixed_phys_base; u64 auxadc_phys_base, apmixed_phys_base;
mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL); mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
if (!mt) if (!mt)
return -ENOMEM; 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"); mt->clk_peri_therm = devm_clk_get(&pdev->dev, "therm");
if (IS_ERR(mt->clk_peri_therm)) if (IS_ERR(mt->clk_peri_therm))
return PTR_ERR(mt->clk_peri_therm); return PTR_ERR(mt->clk_peri_therm);
@ -565,7 +660,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
goto err_disable_clk_auxadc; 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, mtk_thermal_init_bank(mt, i, apmixed_phys_base,
auxadc_phys_base); auxadc_phys_base);
@ -592,13 +687,6 @@ static int mtk_thermal_remove(struct platform_device *pdev)
return 0; return 0;
} }
static const struct of_device_id mtk_thermal_of_match[] = {
{
.compatible = "mediatek,mt8173-thermal",
}, {
},
};
static struct platform_driver mtk_thermal_driver = { static struct platform_driver mtk_thermal_driver = {
.probe = mtk_thermal_probe, .probe = mtk_thermal_probe,
.remove = mtk_thermal_remove, .remove = mtk_thermal_remove,
@ -610,6 +698,7 @@ static struct platform_driver mtk_thermal_driver = {
module_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("Sascha Hauer <s.hauer@pengutronix.de>");
MODULE_AUTHOR("Hanyi Wu <hanyi.wu@mediatek.com>"); MODULE_AUTHOR("Hanyi Wu <hanyi.wu@mediatek.com>");
MODULE_DESCRIPTION("Mediatek thermal driver"); MODULE_DESCRIPTION("Mediatek thermal driver");