Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into thermal-soc
This commit is contained in:
Zhang Rui
commit
032f4a1e5a
|
|
@ -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";
|
||||
};
|
||||
|
|
@ -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 *)
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -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");
|
||||
|
|
@ -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 ***/
|
||||
|
||||
/**
|
||||
|
|
|
|||
|
|
@ -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)
|
||||
|
|
|
|||
Loading…
Reference in New Issue