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

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Zhang Rui 2016-03-15 07:53:01 +08:00
commit 032f4a1e5a
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43
Documentation/devicetree/bindings/thermal/mediatek-thermal.txt Normal file
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@ -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";
};

68
Documentation/thermal/sysfs-api.txt
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@ -72,6 +72,74 @@ temperature) and throttle appropriate devices.
It deletes the corresponding entry form /sys/class/thermal folder and
unbind all the thermal cooling devices it uses.
1.1.3 struct thermal_zone_device *thermal_zone_of_sensor_register(
struct device *dev, int sensor_id, void *data,
const struct thermal_zone_of_device_ops *ops)
This interface adds a new sensor to a DT thermal zone.
This function will search the list of thermal zones described in
device tree and look for the zone that refer to the sensor device
pointed by dev->of_node as temperature providers. For the zone
pointing to the sensor node, the sensor will be added to the DT
thermal zone device.
The parameters for this interface are:
dev: Device node of sensor containing valid node pointer in
dev->of_node.
sensor_id: a sensor identifier, in case the sensor IP has more
than one sensors
data: a private pointer (owned by the caller) that will be
passed back, when a temperature reading is needed.
ops: struct thermal_zone_of_device_ops *.
get_temp: a pointer to a function that reads the
sensor temperature. This is mandatory
callback provided by sensor driver.
get_trend: a pointer to a function that reads the
sensor temperature trend.
set_emul_temp: a pointer to a function that sets
sensor emulated temperature.
The thermal zone temperature is provided by the get_temp() function
pointer of thermal_zone_of_device_ops. When called, it will
have the private pointer @data back.
It returns error pointer if fails otherwise valid thermal zone device
handle. Caller should check the return handle with IS_ERR() for finding
whether success or not.
1.1.4 void thermal_zone_of_sensor_unregister(struct device *dev,
struct thermal_zone_device *tzd)
This interface unregisters a sensor from a DT thermal zone which was
successfully added by interface thermal_zone_of_sensor_register().
This function removes the sensor callbacks and private data from the
thermal zone device registered with thermal_zone_of_sensor_register()
interface. It will also silent the zone by remove the .get_temp() and
get_trend() thermal zone device callbacks.
1.1.5 struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
struct device *dev, int sensor_id,
void *data, const struct thermal_zone_of_device_ops *ops)
This interface is resource managed version of
thermal_zone_of_sensor_register().
All details of thermal_zone_of_sensor_register() described in
section 1.1.3 is applicable here.
The benefit of using this interface to register sensor is that it
is not require to explicitly call thermal_zone_of_sensor_unregister()
in error path or during driver unbinding as this is done by driver
resource manager.
1.1.6 void devm_thermal_zone_of_sensor_unregister(struct device *dev,
struct thermal_zone_device *tzd)
This interface is resource managed version of
thermal_zone_of_sensor_unregister().
All details of thermal_zone_of_sensor_unregister() described in
section 1.1.4 is applicable here.
Normally this function will not need to be called and the resource
management code will ensure that the resource is freed.
1.2 thermal cooling device interface
1.2.1 struct thermal_cooling_device *thermal_cooling_device_register(char *name,
void *devdata, struct thermal_cooling_device_ops *)

9
drivers/thermal/Kconfig
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@ -372,6 +372,15 @@ config INTEL_PCH_THERMAL
Thermal reporting device will provide temperature reading,
programmable trip points and other information.
config MTK_THERMAL
tristate "Temperature sensor driver for mediatek SoCs"
depends on ARCH_MEDIATEK || COMPILE_TEST
depends on HAS_IOMEM
default y
help
Enable this option if you want to have support for thermal management
controller present in Mediatek SoCs
menu "Texas Instruments thermal drivers"
depends on ARCH_HAS_BANDGAP || COMPILE_TEST
depends on HAS_IOMEM

1
drivers/thermal/Makefile
View File

@ -48,3 +48,4 @@ obj-$(CONFIG_INTEL_PCH_THERMAL) += intel_pch_thermal.o
obj-$(CONFIG_ST_THERMAL) += st/
obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o
obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o
obj-$(CONFIG_MTK_THERMAL) += mtk_thermal.o

625
drivers/thermal/mtk_thermal.c Normal file
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@ -0,0 +1,625 @@
/*
* Copyright (c) 2015 MediaTek Inc.
* Author: Hanyi Wu <hanyi.wu@mediatek.com>
* Sascha Hauer <s.hauer@pengutronix.de>
*
* 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
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/thermal.h>
#include <linux/reset.h>
#include <linux/types.h>
#include <linux/nvmem-consumer.h>
/* AUXADC Registers */
#define AUXADC_CON0_V 0x000
#define AUXADC_CON1_V 0x004
#define AUXADC_CON1_SET_V 0x008
#define AUXADC_CON1_CLR_V 0x00c
#define AUXADC_CON2_V 0x010
#define AUXADC_DATA(channel) (0x14 + (channel) * 4)
#define AUXADC_MISC_V 0x094
#define AUXADC_CON1_CHANNEL(x) BIT(x)
#define APMIXED_SYS_TS_CON1 0x604
/* Thermal Controller Registers */
#define TEMP_MONCTL0 0x000
#define TEMP_MONCTL1 0x004
#define TEMP_MONCTL2 0x008
#define TEMP_MONIDET0 0x014
#define TEMP_MONIDET1 0x018
#define TEMP_MSRCTL0 0x038
#define TEMP_AHBPOLL 0x040
#define TEMP_AHBTO 0x044
#define TEMP_ADCPNP0 0x048
#define TEMP_ADCPNP1 0x04c
#define TEMP_ADCPNP2 0x050
#define TEMP_ADCPNP3 0x0b4
#define TEMP_ADCMUX 0x054
#define TEMP_ADCEN 0x060
#define TEMP_PNPMUXADDR 0x064
#define TEMP_ADCMUXADDR 0x068
#define TEMP_ADCENADDR 0x074
#define TEMP_ADCVALIDADDR 0x078
#define TEMP_ADCVOLTADDR 0x07c
#define TEMP_RDCTRL 0x080
#define TEMP_ADCVALIDMASK 0x084
#define TEMP_ADCVOLTAGESHIFT 0x088
#define TEMP_ADCWRITECTRL 0x08c
#define TEMP_MSR0 0x090
#define TEMP_MSR1 0x094
#define TEMP_MSR2 0x098
#define TEMP_MSR3 0x0B8
#define TEMP_SPARE0 0x0f0
#define PTPCORESEL 0x400
#define TEMP_MONCTL1_PERIOD_UNIT(x) ((x) & 0x3ff)
#define TEMP_MONCTL2_FILTER_INTERVAL(x) (((x) & 0x3ff) << 16)
#define TEMP_MONCTL2_SENSOR_INTERVAL(x) ((x) & 0x3ff)
#define TEMP_AHBPOLL_ADC_POLL_INTERVAL(x) (x)
#define TEMP_ADCWRITECTRL_ADC_PNP_WRITE BIT(0)
#define TEMP_ADCWRITECTRL_ADC_MUX_WRITE BIT(1)
#define TEMP_ADCVALIDMASK_VALID_HIGH BIT(5)
#define TEMP_ADCVALIDMASK_VALID_POS(bit) (bit)
#define MT8173_TS1 0
#define MT8173_TS2 1
#define MT8173_TS3 2
#define MT8173_TS4 3
#define MT8173_TSABB 4
/* 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 THERMAL_NAME "mtk-thermal"
struct mtk_thermal;
struct mtk_thermal_bank {
struct mtk_thermal *mt;
int id;
};
struct mtk_thermal {
struct device *dev;
void __iomem *thermal_base;
struct clk *clk_peri_therm;
struct clk *clk_auxadc;
struct mtk_thermal_bank banks[MT8173_NUM_ZONES];
/* lock: for getting and putting banks */
struct mutex lock;
/* Calibration values */
s32 adc_ge;
s32 degc_cali;
s32 o_slope;
s32 vts[MT8173_NUM_SENSORS];
struct thermal_zone_device *tzd;
};
struct mtk_thermal_bank_cfg {
unsigned int num_sensors;
unsigned int sensors[MT8173_NUM_SENSORS_PER_ZONE];
};
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
* SoC. Since TS2 is located centrally in the SoC it is influenced by multiple
* areas, hence is used in different banks.
*
* The thermal core only gets the maximum temperature of all banks, 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, 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 },
},
};
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,
},
};
/**
* raw_to_mcelsius - convert a raw ADC value to mcelsius
* @mt: The thermal controller
* @raw: raw ADC value
*
* This converts the raw ADC value to mcelsius using the SoC specific
* calibration constants
*/
static int raw_to_mcelsius(struct mtk_thermal *mt, int sensno, s32 raw)
{
s32 tmp;
raw &= 0xfff;
tmp = 203450520 << 3;
tmp /= 165 + mt->o_slope;
tmp /= 10000 + mt->adc_ge;
tmp *= raw - mt->vts[sensno] - 3350;
tmp >>= 3;
return mt->degc_cali * 500 - tmp;
}
/**
* mtk_thermal_get_bank - get bank
* @bank: The bank
*
* The bank registers are banked, we have to select a bank in the
* PTPCORESEL register to access it.
*/
static void mtk_thermal_get_bank(struct mtk_thermal_bank *bank)
{
struct mtk_thermal *mt = bank->mt;
u32 val;
mutex_lock(&mt->lock);
val = readl(mt->thermal_base + PTPCORESEL);
val &= ~0xf;
val |= bank->id;
writel(val, mt->thermal_base + PTPCORESEL);
}
/**
* mtk_thermal_put_bank - release bank
* @bank: The bank
*
* release a bank previously taken with mtk_thermal_get_bank,
*/
static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
{
struct mtk_thermal *mt = bank->mt;
mutex_unlock(&mt->lock);
}
/**
* mtk_thermal_bank_temperature - get the temperature of a bank
* @bank: The bank
*
* The temperature of a bank is considered the maximum temperature of
* the sensors associated to the bank.
*/
static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
{
struct mtk_thermal *mt = bank->mt;
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);
temp = raw_to_mcelsius(mt, bank_data[bank->id].sensors[i], raw);
/*
* The first read of a sensor often contains very high bogus
* temperature value. Filter these out so that the system does
* not immediately shut down.
*/
if (temp > 200000)
temp = 0;
if (temp > max)
max = temp;
}
return max;
}
static int mtk_read_temp(void *data, int *temperature)
{
struct mtk_thermal *mt = data;
int i;
int tempmax = INT_MIN;
for (i = 0; i < MT8173_NUM_ZONES; i++) {
struct mtk_thermal_bank *bank = &mt->banks[i];
mtk_thermal_get_bank(bank);
tempmax = max(tempmax, mtk_thermal_bank_temperature(bank));
mtk_thermal_put_bank(bank);
}
*temperature = tempmax;
return 0;
}
static const struct thermal_zone_of_device_ops mtk_thermal_ops = {
.get_temp = mtk_read_temp,
};
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];
int i;
bank->id = num;
bank->mt = mt;
mtk_thermal_get_bank(bank);
/* bus clock 66M counting unit is 12 * 15.15ns * 256 = 46.540us */
writel(TEMP_MONCTL1_PERIOD_UNIT(12), mt->thermal_base + TEMP_MONCTL1);
/*
* filt interval is 1 * 46.540us = 46.54us,
* sen interval is 429 * 46.540us = 19.96ms
*/
writel(TEMP_MONCTL2_FILTER_INTERVAL(1) |
TEMP_MONCTL2_SENSOR_INTERVAL(429),
mt->thermal_base + TEMP_MONCTL2);
/* poll is set to 10u */
writel(TEMP_AHBPOLL_ADC_POLL_INTERVAL(768),
mt->thermal_base + TEMP_AHBPOLL);
/* temperature sampling control, 1 sample */
writel(0x0, mt->thermal_base + TEMP_MSRCTL0);
/* exceed this polling time, IRQ would be inserted */
writel(0xffffffff, mt->thermal_base + TEMP_AHBTO);
/* number of interrupts per event, 1 is enough */
writel(0x0, mt->thermal_base + TEMP_MONIDET0);
writel(0x0, mt->thermal_base + TEMP_MONIDET1);
/*
* The MT8173 thermal controller does not have its own ADC. Instead it
* uses AHB bus accesses to control the AUXADC. To do this the thermal
* controller has to be programmed with the physical addresses of the
* AUXADC registers and with the various bit positions in the AUXADC.
* Also the thermal controller controls a mux in the APMIXEDSYS register
* space.
*/
/*
* this value will be stored to TEMP_PNPMUXADDR (TEMP_SPARE0)
* automatically by hw
*/
writel(BIT(MT8173_TEMP_AUXADC_CHANNEL), mt->thermal_base + TEMP_ADCMUX);
/* AHB address for auxadc mux selection */
writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
mt->thermal_base + TEMP_ADCMUXADDR);
/* AHB address for pnp sensor mux selection */
writel(apmixed_phys_base + APMIXED_SYS_TS_CON1,
mt->thermal_base + TEMP_PNPMUXADDR);
/* AHB value for auxadc enable */
writel(BIT(MT8173_TEMP_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),
mt->thermal_base + TEMP_ADCVALIDADDR);
/* AHB address for auxadc voltage output */
writel(auxadc_phys_base + AUXADC_DATA(MT8173_TEMP_AUXADC_CHANNEL),
mt->thermal_base + TEMP_ADCVOLTADDR);
/* read valid & voltage are at the same register */
writel(0x0, mt->thermal_base + TEMP_RDCTRL);
/* indicate where the valid bit is */
writel(TEMP_ADCVALIDMASK_VALID_HIGH | TEMP_ADCVALIDMASK_VALID_POS(12),
mt->thermal_base + TEMP_ADCVALIDMASK);
/* no shift */
writel(0x0, mt->thermal_base + TEMP_ADCVOLTAGESHIFT);
/* enable auxadc mux write transaction */
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);
writel((1 << cfg->num_sensors) - 1, mt->thermal_base + TEMP_MONCTL0);
writel(TEMP_ADCWRITECTRL_ADC_PNP_WRITE |
TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
mt->thermal_base + TEMP_ADCWRITECTRL);
mtk_thermal_put_bank(bank);
}
static u64 of_get_phys_base(struct device_node *np)
{
u64 size64;
const __be32 *regaddr_p;
regaddr_p = of_get_address(np, 0, &size64, NULL);
if (!regaddr_p)
return OF_BAD_ADDR;
return of_translate_address(np, regaddr_p);
}
static int mtk_thermal_get_calibration_data(struct device *dev,
struct mtk_thermal *mt)
{
struct nvmem_cell *cell;
u32 *buf;
size_t len;
int i, ret = 0;
/* Start with default values */
mt->adc_ge = 512;
for (i = 0; i < MT8173_NUM_SENSORS; i++)
mt->vts[i] = 260;
mt->degc_cali = 40;
mt->o_slope = 0;
cell = nvmem_cell_get(dev, "calibration-data");
if (IS_ERR(cell)) {
if (PTR_ERR(cell) == -EPROBE_DEFER)
return PTR_ERR(cell);
return 0;
}
buf = (u32 *)nvmem_cell_read(cell, &len);
nvmem_cell_put(cell);
if (IS_ERR(buf))
return PTR_ERR(buf);
if (len < 3 * sizeof(u32)) {
dev_warn(dev, "invalid calibration data\n");
ret = -EINVAL;
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]);
} else {
dev_info(dev, "Device not calibrated, using default calibration values\n");
}
out:
kfree(buf);
return ret;
}
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;
u64 auxadc_phys_base, apmixed_phys_base;
mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
if (!mt)
return -ENOMEM;
mt->clk_peri_therm = devm_clk_get(&pdev->dev, "therm");
if (IS_ERR(mt->clk_peri_therm))
return PTR_ERR(mt->clk_peri_therm);
mt->clk_auxadc = devm_clk_get(&pdev->dev, "auxadc");
if (IS_ERR(mt->clk_auxadc))
return PTR_ERR(mt->clk_auxadc);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mt->thermal_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(mt->thermal_base))
return PTR_ERR(mt->thermal_base);
ret = mtk_thermal_get_calibration_data(&pdev->dev, mt);
if (ret)
return ret;
mutex_init(&mt->lock);
mt->dev = &pdev->dev;
auxadc = of_parse_phandle(np, "mediatek,auxadc", 0);
if (!auxadc) {
dev_err(&pdev->dev, "missing auxadc node\n");
return -ENODEV;
}
auxadc_phys_base = of_get_phys_base(auxadc);
of_node_put(auxadc);
if (auxadc_phys_base == OF_BAD_ADDR) {
dev_err(&pdev->dev, "Can't get auxadc phys address\n");
return -EINVAL;
}
apmixedsys = of_parse_phandle(np, "mediatek,apmixedsys", 0);
if (!apmixedsys) {
dev_err(&pdev->dev, "missing apmixedsys node\n");
return -ENODEV;
}
apmixed_phys_base = of_get_phys_base(apmixedsys);
of_node_put(apmixedsys);
if (apmixed_phys_base == OF_BAD_ADDR) {
dev_err(&pdev->dev, "Can't get auxadc phys address\n");
return -EINVAL;
}
ret = clk_prepare_enable(mt->clk_auxadc);
if (ret) {
dev_err(&pdev->dev, "Can't enable auxadc clk: %d\n", ret);
return ret;
}
ret = device_reset(&pdev->dev);
if (ret)
goto err_disable_clk_auxadc;
ret = clk_prepare_enable(mt->clk_peri_therm);
if (ret) {
dev_err(&pdev->dev, "Can't enable peri clk: %d\n", ret);
goto err_disable_clk_auxadc;
}
for (i = 0; i < MT8173_NUM_ZONES; i++)
mtk_thermal_init_bank(mt, i, apmixed_phys_base,
auxadc_phys_base);
platform_set_drvdata(pdev, mt);
mt->tzd = thermal_zone_of_sensor_register(&pdev->dev, 0, mt,
&mtk_thermal_ops);
if (IS_ERR(mt->tzd))
goto err_register;
return 0;
err_register:
clk_disable_unprepare(mt->clk_peri_therm);
err_disable_clk_auxadc:
clk_disable_unprepare(mt->clk_auxadc);
return ret;
}
static int mtk_thermal_remove(struct platform_device *pdev)
{
struct mtk_thermal *mt = platform_get_drvdata(pdev);
thermal_zone_of_sensor_unregister(&pdev->dev, mt->tzd);
clk_disable_unprepare(mt->clk_peri_therm);
clk_disable_unprepare(mt->clk_auxadc);
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,
.driver = {
.name = THERMAL_NAME,
.of_match_table = mtk_thermal_of_match,
},
};
module_platform_driver(mtk_thermal_driver);
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
MODULE_AUTHOR("Hanyi Wu <hanyi.wu@mediatek.com>");
MODULE_DESCRIPTION("Mediatek thermal driver");
MODULE_LICENSE("GPL v2");

81
drivers/thermal/of-thermal.c
View File

@ -555,6 +555,87 @@ void thermal_zone_of_sensor_unregister(struct device *dev,
}
EXPORT_SYMBOL_GPL(thermal_zone_of_sensor_unregister);
static void devm_thermal_zone_of_sensor_release(struct device *dev, void *res)
{
thermal_zone_of_sensor_unregister(dev,
*(struct thermal_zone_device **)res);
}
static int devm_thermal_zone_of_sensor_match(struct device *dev, void *res,
void *data)
{
struct thermal_zone_device **r = res;
if (WARN_ON(!r || !*r))
return 0;
return *r == data;
}
/**
* devm_thermal_zone_of_sensor_register - Resource managed version of
* thermal_zone_of_sensor_register()
* @dev: a valid struct device pointer of a sensor device. Must contain
* a valid .of_node, for the sensor node.
* @sensor_id: a sensor identifier, in case the sensor IP has more
* than one sensors
* @data: a private pointer (owned by the caller) that will be passed
* back, when a temperature reading is needed.
* @ops: struct thermal_zone_of_device_ops *. Must contain at least .get_temp.
*
* Refer thermal_zone_of_sensor_register() for more details.
*
* Return: On success returns a valid struct thermal_zone_device,
* otherwise, it returns a corresponding ERR_PTR(). Caller must
* check the return value with help of IS_ERR() helper.
* Registered hermal_zone_device device will automatically be
* released when device is unbounded.
*/
struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
struct device *dev, int sensor_id,
void *data, const struct thermal_zone_of_device_ops *ops)
{
struct thermal_zone_device **ptr, *tzd;
ptr = devres_alloc(devm_thermal_zone_of_sensor_release, sizeof(*ptr),
GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
tzd = thermal_zone_of_sensor_register(dev, sensor_id, data, ops);
if (IS_ERR(tzd)) {
devres_free(ptr);
return tzd;
}
*ptr = tzd;
devres_add(dev, ptr);
return tzd;
}
EXPORT_SYMBOL_GPL(devm_thermal_zone_of_sensor_register);
/**
* devm_thermal_zone_of_sensor_unregister - Resource managed version of
* thermal_zone_of_sensor_unregister().
* @dev: Device for which which resource was allocated.
* @tzd: a pointer to struct thermal_zone_device where the sensor is registered.
*
* This function removes the sensor callbacks and private data from the
* thermal zone device registered with devm_thermal_zone_of_sensor_register()
* API. It will also silent the zone by remove the .get_temp() and .get_trend()
* thermal zone device callbacks.
* Normally this function will not need to be called and the resource
* management code will ensure that the resource is freed.
*/
void devm_thermal_zone_of_sensor_unregister(struct device *dev,
struct thermal_zone_device *tzd)
{
WARN_ON(devres_release(dev, devm_thermal_zone_of_sensor_release,
devm_thermal_zone_of_sensor_match, tzd));
}
EXPORT_SYMBOL_GPL(devm_thermal_zone_of_sensor_unregister);
/*** functions parsing device tree nodes ***/
/**

18
include/linux/thermal.h
View File

@ -362,6 +362,11 @@ thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
const struct thermal_zone_of_device_ops *ops);
void thermal_zone_of_sensor_unregister(struct device *dev,
struct thermal_zone_device *tz);
struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
struct device *dev, int id, void *data,
const struct thermal_zone_of_device_ops *ops);
void devm_thermal_zone_of_sensor_unregister(struct device *dev,
struct thermal_zone_device *tz);
#else
static inline struct thermal_zone_device *
thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
@ -376,6 +381,19 @@ void thermal_zone_of_sensor_unregister(struct device *dev,
{
}
static inline struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
struct device *dev, int id, void *data,
const struct thermal_zone_of_device_ops *ops)
{
return ERR_PTR(-ENODEV);
}
static inline
void devm_thermal_zone_of_sensor_unregister(struct device *dev,
struct thermal_zone_device *tz)
{
}
#endif
#if IS_ENABLED(CONFIG_THERMAL)