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linux/drivers/thermal/mtk_thermal.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

999 lines
26 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2015 MediaTek Inc.
* Author: Hanyi Wu <hanyi.wu@mediatek.com>
* Sascha Hauer <s.hauer@pengutronix.de>
* Dawei Chien <dawei.chien@mediatek.com>
* Louis Yu <louis.yu@mediatek.com>
*/
#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/of_device.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>
/* AUXADC Registers */
#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 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 TEMP_ADCPNP0_1 0x148
#define TEMP_ADCPNP1_1 0x14c
#define TEMP_ADCPNP2_1 0x150
#define TEMP_MSR0_1 0x190
#define TEMP_MSR1_1 0x194
#define TEMP_MSR2_1 0x198
#define TEMP_ADCPNP3_1 0x1b4
#define TEMP_MSR3_1 0x1B8
#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)
/* MT8173 thermal sensors */
#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
/* The number of controller in the MT8173 */
#define MT8173_NUM_CONTROLLER 1
/* The calibration coefficient of sensor */
#define MT8173_CALIBRATION 165
/*
* Layout of the fuses providing the calibration data
* These macros could be used for MT8183, MT8173, MT2701, and MT2712.
* MT8183 has 6 sensors and needs 6 VTS calibration data.
* MT8173 has 5 sensors and needs 5 VTS calibration data.
* MT2701 has 3 sensors and needs 3 VTS calibration data.
* MT2712 has 4 sensors and needs 4 VTS calibration data.
*/
#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) >> 5) & 0x1ff)
#define CALIB_BUF2_VTS_TSABB(x) (((x) >> 14) & 0x1ff)
#define CALIB_BUF0_DEGC_CALI(x) (((x) >> 1) & 0x3f)
#define CALIB_BUF0_O_SLOPE(x) (((x) >> 26) & 0x3f)
#define CALIB_BUF0_O_SLOPE_SIGN(x) (((x) >> 7) & 0x1)
#define CALIB_BUF1_ID(x) (((x) >> 9) & 0x1)
enum {
VTS1,
VTS2,
VTS3,
VTS4,
VTS5,
VTSABB,
MAX_NUM_VTS,
};
/* 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
/* The number of sensing points per bank */
#define MT2701_NUM_SENSORS_PER_ZONE 3
/* The number of controller in the MT2701 */
#define MT2701_NUM_CONTROLLER 1
/* The calibration coefficient of sensor */
#define MT2701_CALIBRATION 165
/* MT2712 thermal sensors */
#define MT2712_TS1 0
#define MT2712_TS2 1
#define MT2712_TS3 2
#define MT2712_TS4 3
/* AUXADC channel 11 is used for the temperature sensors */
#define MT2712_TEMP_AUXADC_CHANNEL 11
/* The total number of temperature sensors in the MT2712 */
#define MT2712_NUM_SENSORS 4
/* The number of sensing points per bank */
#define MT2712_NUM_SENSORS_PER_ZONE 4
/* The number of controller in the MT2712 */
#define MT2712_NUM_CONTROLLER 1
/* The calibration coefficient of sensor */
#define MT2712_CALIBRATION 165
#define MT7622_TEMP_AUXADC_CHANNEL 11
#define MT7622_NUM_SENSORS 1
#define MT7622_NUM_ZONES 1
#define MT7622_NUM_SENSORS_PER_ZONE 1
#define MT7622_TS1 0
#define MT7622_NUM_CONTROLLER 1
/* The maximum number of banks */
#define MAX_NUM_ZONES 8
/* The calibration coefficient of sensor */
#define MT7622_CALIBRATION 165
/* MT8183 thermal sensors */
#define MT8183_TS1 0
#define MT8183_TS2 1
#define MT8183_TS3 2
#define MT8183_TS4 3
#define MT8183_TS5 4
#define MT8183_TSABB 5
/* AUXADC channel is used for the temperature sensors */
#define MT8183_TEMP_AUXADC_CHANNEL 11
/* The total number of temperature sensors in the MT8183 */
#define MT8183_NUM_SENSORS 6
/* The number of sensing points per bank */
#define MT8183_NUM_SENSORS_PER_ZONE 6
/* The number of controller in the MT8183 */
#define MT8183_NUM_CONTROLLER 2
/* The calibration coefficient of sensor */
#define MT8183_CALIBRATION 153
struct mtk_thermal;
struct thermal_bank_cfg {
unsigned int num_sensors;
const int *sensors;
};
struct mtk_thermal_bank {
struct mtk_thermal *mt;
int id;
};
struct mtk_thermal_data {
s32 num_banks;
s32 num_sensors;
s32 auxadc_channel;
const int *vts_index;
const int *sensor_mux_values;
const int *msr;
const int *adcpnp;
const int cali_val;
const int num_controller;
const int *controller_offset;
bool need_switch_bank;
struct thermal_bank_cfg bank_data[MAX_NUM_ZONES];
};
struct mtk_thermal {
struct device *dev;
void __iomem *thermal_base;
struct clk *clk_peri_therm;
struct clk *clk_auxadc;
/* lock: for getting and putting banks */
struct mutex lock;
/* Calibration values */
s32 adc_ge;
s32 degc_cali;
s32 o_slope;
s32 vts[MAX_NUM_VTS];
const struct mtk_thermal_data *conf;
struct mtk_thermal_bank banks[MAX_NUM_ZONES];
};
/* MT8183 thermal sensor data */
static const int mt8183_bank_data[MT8183_NUM_SENSORS] = {
MT8183_TS1, MT8183_TS2, MT8183_TS3, MT8183_TS4, MT8183_TS5, MT8183_TSABB
};
static const int mt8183_msr[MT8183_NUM_SENSORS_PER_ZONE] = {
TEMP_MSR0_1, TEMP_MSR1_1, TEMP_MSR2_1, TEMP_MSR1, TEMP_MSR0, TEMP_MSR3_1
};
static const int mt8183_adcpnp[MT8183_NUM_SENSORS_PER_ZONE] = {
TEMP_ADCPNP0_1, TEMP_ADCPNP1_1, TEMP_ADCPNP2_1,
TEMP_ADCPNP1, TEMP_ADCPNP0, TEMP_ADCPNP3_1
};
static const int mt8183_mux_values[MT8183_NUM_SENSORS] = { 0, 1, 2, 3, 4, 0 };
static const int mt8183_tc_offset[MT8183_NUM_CONTROLLER] = {0x0, 0x100};
static const int mt8183_vts_index[MT8183_NUM_SENSORS] = {
VTS1, VTS2, VTS3, VTS4, VTS5, VTSABB
};
/* MT8173 thermal sensor data */
static const int mt8173_bank_data[MT8173_NUM_ZONES][3] = {
{ MT8173_TS2, MT8173_TS3 },
{ MT8173_TS2, MT8173_TS4 },
{ MT8173_TS1, MT8173_TS2, MT8173_TSABB },
{ MT8173_TS2 },
};
static const int mt8173_msr[MT8173_NUM_SENSORS_PER_ZONE] = {
TEMP_MSR0, TEMP_MSR1, TEMP_MSR2, TEMP_MSR3
};
static const int mt8173_adcpnp[MT8173_NUM_SENSORS_PER_ZONE] = {
TEMP_ADCPNP0, TEMP_ADCPNP1, TEMP_ADCPNP2, TEMP_ADCPNP3
};
static const int mt8173_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
static const int mt8173_tc_offset[MT8173_NUM_CONTROLLER] = { 0x0, };
static const int mt8173_vts_index[MT8173_NUM_SENSORS] = {
VTS1, VTS2, VTS3, VTS4, VTSABB
};
/* MT2701 thermal sensor data */
static const int mt2701_bank_data[MT2701_NUM_SENSORS] = {
MT2701_TS1, MT2701_TS2, MT2701_TSABB
};
static const int mt2701_msr[MT2701_NUM_SENSORS_PER_ZONE] = {
TEMP_MSR0, TEMP_MSR1, TEMP_MSR2
};
static const int mt2701_adcpnp[MT2701_NUM_SENSORS_PER_ZONE] = {
TEMP_ADCPNP0, TEMP_ADCPNP1, TEMP_ADCPNP2
};
static const int mt2701_mux_values[MT2701_NUM_SENSORS] = { 0, 1, 16 };
static const int mt2701_tc_offset[MT2701_NUM_CONTROLLER] = { 0x0, };
static const int mt2701_vts_index[MT2701_NUM_SENSORS] = {
VTS1, VTS2, VTS3
};
/* MT2712 thermal sensor data */
static const int mt2712_bank_data[MT2712_NUM_SENSORS] = {
MT2712_TS1, MT2712_TS2, MT2712_TS3, MT2712_TS4
};
static const int mt2712_msr[MT2712_NUM_SENSORS_PER_ZONE] = {
TEMP_MSR0, TEMP_MSR1, TEMP_MSR2, TEMP_MSR3
};
static const int mt2712_adcpnp[MT2712_NUM_SENSORS_PER_ZONE] = {
TEMP_ADCPNP0, TEMP_ADCPNP1, TEMP_ADCPNP2, TEMP_ADCPNP3
};
static const int mt2712_mux_values[MT2712_NUM_SENSORS] = { 0, 1, 2, 3 };
static const int mt2712_tc_offset[MT2712_NUM_CONTROLLER] = { 0x0, };
static const int mt2712_vts_index[MT2712_NUM_SENSORS] = {
VTS1, VTS2, VTS3, VTS4
};
/* MT7622 thermal sensor data */
static const int mt7622_bank_data[MT7622_NUM_SENSORS] = { MT7622_TS1, };
static const int mt7622_msr[MT7622_NUM_SENSORS_PER_ZONE] = { TEMP_MSR0, };
static const int mt7622_adcpnp[MT7622_NUM_SENSORS_PER_ZONE] = { TEMP_ADCPNP0, };
static const int mt7622_mux_values[MT7622_NUM_SENSORS] = { 0, };
static const int mt7622_vts_index[MT7622_NUM_SENSORS] = { VTS1 };
static const int mt7622_tc_offset[MT7622_NUM_CONTROLLER] = { 0x0, };
/**
* 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_data mt8173_thermal_data = {
.auxadc_channel = MT8173_TEMP_AUXADC_CHANNEL,
.num_banks = MT8173_NUM_ZONES,
.num_sensors = MT8173_NUM_SENSORS,
.vts_index = mt8173_vts_index,
.cali_val = MT8173_CALIBRATION,
.num_controller = MT8173_NUM_CONTROLLER,
.controller_offset = mt8173_tc_offset,
.need_switch_bank = true,
.bank_data = {
{
.num_sensors = 2,
.sensors = mt8173_bank_data[0],
}, {
.num_sensors = 2,
.sensors = mt8173_bank_data[1],
}, {
.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,
};
/**
* 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 = MT2701_NUM_SENSORS,
.vts_index = mt2701_vts_index,
.cali_val = MT2701_CALIBRATION,
.num_controller = MT2701_NUM_CONTROLLER,
.controller_offset = mt2701_tc_offset,
.need_switch_bank = true,
.bank_data = {
{
.num_sensors = 3,
.sensors = mt2701_bank_data,
},
},
.msr = mt2701_msr,
.adcpnp = mt2701_adcpnp,
.sensor_mux_values = mt2701_mux_values,
};
/**
* The MT2712 thermal controller has one bank, which can read up to
* four temperature sensors simultaneously. The MT2712 has a total of 4
* 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 mt2712_thermal_data = {
.auxadc_channel = MT2712_TEMP_AUXADC_CHANNEL,
.num_banks = 1,
.num_sensors = MT2712_NUM_SENSORS,
.vts_index = mt2712_vts_index,
.cali_val = MT2712_CALIBRATION,
.num_controller = MT2712_NUM_CONTROLLER,
.controller_offset = mt2712_tc_offset,
.need_switch_bank = true,
.bank_data = {
{
.num_sensors = 4,
.sensors = mt2712_bank_data,
},
},
.msr = mt2712_msr,
.adcpnp = mt2712_adcpnp,
.sensor_mux_values = mt2712_mux_values,
};
/*
* MT7622 have only one sensing point which uses AUXADC Channel 11 for raw data
* access.
*/
static const struct mtk_thermal_data mt7622_thermal_data = {
.auxadc_channel = MT7622_TEMP_AUXADC_CHANNEL,
.num_banks = MT7622_NUM_ZONES,
.num_sensors = MT7622_NUM_SENSORS,
.vts_index = mt7622_vts_index,
.cali_val = MT7622_CALIBRATION,
.num_controller = MT7622_NUM_CONTROLLER,
.controller_offset = mt7622_tc_offset,
.need_switch_bank = true,
.bank_data = {
{
.num_sensors = 1,
.sensors = mt7622_bank_data,
},
},
.msr = mt7622_msr,
.adcpnp = mt7622_adcpnp,
.sensor_mux_values = mt7622_mux_values,
};
/**
* The MT8183 thermal controller has one bank for the current SW framework.
* The MT8183 has a total of 6 temperature sensors.
* There are two thermal controller to control the six sensor.
* The first one bind 2 sensor, and the other bind 4 sensors.
* The thermal core only gets the maximum temperature of all sensor, 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_data mt8183_thermal_data = {
.auxadc_channel = MT8183_TEMP_AUXADC_CHANNEL,
.num_banks = MT8183_NUM_SENSORS_PER_ZONE,
.num_sensors = MT8183_NUM_SENSORS,
.vts_index = mt8183_vts_index,
.cali_val = MT8183_CALIBRATION,
.num_controller = MT8183_NUM_CONTROLLER,
.controller_offset = mt8183_tc_offset,
.need_switch_bank = false,
.bank_data = {
{
.num_sensors = 6,
.sensors = mt8183_bank_data,
},
},
.msr = mt8183_msr,
.adcpnp = mt8183_adcpnp,
.sensor_mux_values = mt8183_mux_values,
};
/**
* 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 /= mt->conf->cali_val + 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;
if (mt->conf->need_switch_bank) {
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;
if (mt->conf->need_switch_bank)
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;
const struct mtk_thermal_data *conf = mt->conf;
int i, temp = INT_MIN, max = INT_MIN;
u32 raw;
for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
raw = readl(mt->thermal_base +
conf->msr[conf->bank_data[bank->id].sensors[i]]);
temp = raw_to_mcelsius(mt,
conf->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 < mt->conf->num_banks; 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,
int ctrl_id)
{
struct mtk_thermal_bank *bank = &mt->banks[num];
const struct mtk_thermal_data *conf = mt->conf;
int i;
int offset = mt->conf->controller_offset[ctrl_id];
void __iomem *controller_base = mt->thermal_base + offset;
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), controller_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),
controller_base + TEMP_MONCTL2);
/* poll is set to 10u */
writel(TEMP_AHBPOLL_ADC_POLL_INTERVAL(768),
controller_base + TEMP_AHBPOLL);
/* temperature sampling control, 1 sample */
writel(0x0, controller_base + TEMP_MSRCTL0);
/* exceed this polling time, IRQ would be inserted */
writel(0xffffffff, controller_base + TEMP_AHBTO);
/* number of interrupts per event, 1 is enough */
writel(0x0, controller_base + TEMP_MONIDET0);
writel(0x0, controller_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(conf->auxadc_channel), controller_base + TEMP_ADCMUX);
/* AHB address for auxadc mux selection */
writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
controller_base + TEMP_ADCMUXADDR);
/* AHB address for pnp sensor mux selection */
writel(apmixed_phys_base + APMIXED_SYS_TS_CON1,
controller_base + TEMP_PNPMUXADDR);
/* AHB value for auxadc enable */
writel(BIT(conf->auxadc_channel), controller_base + TEMP_ADCEN);
/* AHB address for auxadc enable (channel 0 immediate mode selected) */
writel(auxadc_phys_base + AUXADC_CON1_SET_V,
controller_base + TEMP_ADCENADDR);
/* AHB address for auxadc valid bit */
writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
controller_base + TEMP_ADCVALIDADDR);
/* AHB address for auxadc voltage output */
writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
controller_base + TEMP_ADCVOLTADDR);
/* read valid & voltage are at the same register */
writel(0x0, controller_base + TEMP_RDCTRL);
/* indicate where the valid bit is */
writel(TEMP_ADCVALIDMASK_VALID_HIGH | TEMP_ADCVALIDMASK_VALID_POS(12),
controller_base + TEMP_ADCVALIDMASK);
/* no shift */
writel(0x0, controller_base + TEMP_ADCVOLTAGESHIFT);
/* enable auxadc mux write transaction */
writel(TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
controller_base + TEMP_ADCWRITECTRL);
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->adcpnp[conf->bank_data[num].sensors[i]]);
writel((1 << conf->bank_data[num].num_sensors) - 1,
controller_base + TEMP_MONCTL0);
writel(TEMP_ADCWRITECTRL_ADC_PNP_WRITE |
TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
controller_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 < mt->conf->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] & CALIB_BUF0_VALID) {
mt->adc_ge = CALIB_BUF1_ADC_GE(buf[1]);
for (i = 0; i < mt->conf->num_sensors; i++) {
switch (mt->conf->vts_index[i]) {
case VTS1:
mt->vts[VTS1] = CALIB_BUF0_VTS_TS1(buf[0]);
break;
case VTS2:
mt->vts[VTS2] = CALIB_BUF0_VTS_TS2(buf[0]);
break;
case VTS3:
mt->vts[VTS3] = CALIB_BUF1_VTS_TS3(buf[1]);
break;
case VTS4:
mt->vts[VTS4] = CALIB_BUF2_VTS_TS4(buf[2]);
break;
case VTS5:
mt->vts[VTS5] = CALIB_BUF2_VTS_TS5(buf[2]);
break;
case VTSABB:
mt->vts[VTSABB] = CALIB_BUF2_VTS_TSABB(buf[2]);
break;
default:
break;
}
}
mt->degc_cali = CALIB_BUF0_DEGC_CALI(buf[0]);
if (CALIB_BUF1_ID(buf[1]) &
CALIB_BUF0_O_SLOPE_SIGN(buf[0]))
mt->o_slope = -CALIB_BUF0_O_SLOPE(buf[0]);
else
mt->o_slope = CALIB_BUF0_O_SLOPE(buf[0]);
} else {
dev_info(dev, "Device not calibrated, using default calibration values\n");
}
out:
kfree(buf);
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,
},
{
.compatible = "mediatek,mt2712-thermal",
.data = (void *)&mt2712_thermal_data,
},
{
.compatible = "mediatek,mt7622-thermal",
.data = (void *)&mt7622_thermal_data,
},
{
.compatible = "mediatek,mt8183-thermal",
.data = (void *)&mt8183_thermal_data,
}, {
},
};
MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);
static int mtk_thermal_probe(struct platform_device *pdev)
{
int ret, i, ctrl_id;
struct device_node *auxadc, *apmixedsys, *np = pdev->dev.of_node;
struct mtk_thermal *mt;
struct resource *res;
u64 auxadc_phys_base, apmixed_phys_base;
struct thermal_zone_device *tzdev;
mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
if (!mt)
return -ENOMEM;
mt->conf = of_device_get_match_data(&pdev->dev);
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 = device_reset(&pdev->dev);
if (ret)
return ret;
ret = clk_prepare_enable(mt->clk_auxadc);
if (ret) {
dev_err(&pdev->dev, "Can't enable auxadc clk: %d\n", ret);
return ret;
}
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 (ctrl_id = 0; ctrl_id < mt->conf->num_controller ; ctrl_id++)
for (i = 0; i < mt->conf->num_banks; i++)
mtk_thermal_init_bank(mt, i, apmixed_phys_base,
auxadc_phys_base, ctrl_id);
platform_set_drvdata(pdev, mt);
tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, mt,
&mtk_thermal_ops);
if (IS_ERR(tzdev)) {
ret = PTR_ERR(tzdev);
goto err_disable_clk_peri_therm;
}
return 0;
err_disable_clk_peri_therm:
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);
clk_disable_unprepare(mt->clk_peri_therm);
clk_disable_unprepare(mt->clk_auxadc);
return 0;
}
static struct platform_driver mtk_thermal_driver = {
.probe = mtk_thermal_probe,
.remove = mtk_thermal_remove,
.driver = {
.name = "mtk-thermal",
.of_match_table = mtk_thermal_of_match,
},
};
module_platform_driver(mtk_thermal_driver);
MODULE_AUTHOR("Michael Kao <michael.kao@mediatek.com>");
MODULE_AUTHOR("Louis Yu <louis.yu@mediatek.com>");
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");
MODULE_LICENSE("GPL v2");
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