Re: [PATCH 2/3] thermal: mediatek: Add LVTS drivers for SoC theraml zones
From: Hsin-Yi Wang
Date: Mon Dec 07 2020 - 02:18:55 EST
>
> Add a LVTS (Low voltage thermal sensor) driver to report junction
> temperatures in Mediatek SoC and register the maximum temperature
> of sensors and each sensor as a thermal zone.
>
> Signed-off-by: Yu-Chia Chang <ethan.chang@xxxxxxxxxxxx>
> Signed-off-by: Michael Kao <michael.kao@xxxxxxxxxxxx>
> ---
> drivers/thermal/mediatek/Kconfig | 10 +
> drivers/thermal/mediatek/Makefile | 1 +
> drivers/thermal/mediatek/soc_temp_lvts.c | 1293 ++++++++++++++++++++++
> drivers/thermal/mediatek/soc_temp_lvts.h | 312 ++++++
> 4 files changed, 1616 insertions(+)
> create mode 100644 drivers/thermal/mediatek/soc_temp_lvts.c
> create mode 100644 drivers/thermal/mediatek/soc_temp_lvts.h
>
> diff --git a/drivers/thermal/mediatek/Kconfig b/drivers/thermal/mediatek/Kconfig
> index 0351e73170b7..d716d0372e1e 100644
> --- a/drivers/thermal/mediatek/Kconfig
> +++ b/drivers/thermal/mediatek/Kconfig
> @@ -20,4 +20,14 @@ config MTK_SOC_THERMAL
> configures thermal controllers to collect temperature
> via AUXADC interface.
>
> +config MTK_SOC_THERMAL_LVTS
> + tristate "LVTS (Low voltage thermal sensor) driver for Mediatek SoCs"
> + depends on HAS_IOMEM
> + depends on NVMEM
> + depends on RESET_TI_SYSCON
> + help
> + Enable this option if you want to get SoC temperature
> + information for Mediatek platforms. This driver
> + configures LVTS thermal controllers to collect temperatures
> + via Analog Serial Interface(ASIF).
> endif
> diff --git a/drivers/thermal/mediatek/Makefile b/drivers/thermal/mediatek/Makefile
> index f75313ddce5e..16ce166e5916 100644
> --- a/drivers/thermal/mediatek/Makefile
> +++ b/drivers/thermal/mediatek/Makefile
> @@ -1 +1,2 @@
> obj-$(CONFIG_MTK_SOC_THERMAL) += soc_temp.o
> +obj-$(CONFIG_MTK_SOC_THERMAL_LVTS) += soc_temp_lvts.o
> diff --git a/drivers/thermal/mediatek/soc_temp_lvts.c b/drivers/thermal/mediatek/soc_temp_lvts.c
> new file mode 100644
> index 000000000000..1a608870c151
> --- /dev/null
> +++ b/drivers/thermal/mediatek/soc_temp_lvts.c
> @@ -0,0 +1,1293 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2020 MediaTek Inc.
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/of_irq.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/clk.h>
> +#include <linux/bits.h>
> +#include <linux/string.h>
> +#include <linux/iopoll.h>
> +#include "soc_temp_lvts.h"
sort headers
> +
> +/*==================================================
> + * Definition or macro function
> + *==================================================
> + */
> +#define STOP_COUNTING_V4 (DEVICE_WRITE | RG_TSFM_CTRL_0 << 8 | 0x00)
> +#define SET_RG_TSFM_LPDLY_V4 (DEVICE_WRITE | RG_TSFM_CTRL_4 << 8 | 0xA6)
> +#define SET_COUNTING_WINDOW_20US1_V4 (DEVICE_WRITE | RG_TSFM_CTRL_2 << 8 | 0x00)
> +#define SET_COUNTING_WINDOW_20US2_V4 (DEVICE_WRITE | RG_TSFM_CTRL_1 << 8 | 0x20)
> +#define TSV2F_CHOP_CKSEL_AND_TSV2F_EN_V4 (DEVICE_WRITE | RG_TSV2F_CTRL_2 << 8 | 0x84)
> +#define TSBG_DEM_CKSEL_X_TSBG_CHOP_EN_V4 (DEVICE_WRITE | RG_TSV2F_CTRL_4 << 8 | 0x7C)
> +#define SET_TS_RSV_V4 (DEVICE_WRITE | RG_TSV2F_CTRL_1 << 8 | 0x8D)
> +#define SET_TS_EN_V4 (DEVICE_WRITE | RG_TSV2F_CTRL_0 << 8 | 0xF4)
> +#define TOGGLE_RG_TSV2F_VCO_RST1_V4 (DEVICE_WRITE | RG_TSV2F_CTRL_0 << 8 | 0xFC)
> +#define TOGGLE_RG_TSV2F_VCO_RST2_V4 (DEVICE_WRITE | RG_TSV2F_CTRL_0 << 8 | 0xF4)
> +
> +#define SET_LVTS_AUTO_RCK_V4 (DEVICE_WRITE | RG_TSV2F_CTRL_6 << 8 | 0x01)
> +#define SELECT_SENSOR_RCK_V4(id) (DEVICE_WRITE | RG_TSV2F_CTRL_5 << 8 | (id))
> +#define SET_DEVICE_SINGLE_MODE_V4 (DEVICE_WRITE | RG_TSFM_CTRL_3 << 8 | 0x78)
> +#define KICK_OFF_RCK_COUNTING_V4 (DEVICE_WRITE | RG_TSFM_CTRL_0 << 8 | 0x02)
> +#define SET_SENSOR_NO_RCK_V4 (DEVICE_WRITE | RG_TSV2F_CTRL_5 << 8 | 0x10)
> +#define SET_DEVICE_LOW_POWER_SINGLE_MODE_V4 (DEVICE_WRITE | RG_TSFM_CTRL_3 << 8 | 0xB8)
> +
> +#define ENABLE_FEATURE(feature) (lvts_data->feature_bitmap |= (feature))
> +#define DISABLE_FEATURE(feature) (lvts_data->feature_bitmap &= (~(feature)))
> +#define IS_ENABLE(feature) (lvts_data->feature_bitmap & (feature))
> +
> +#define DISABLE_THERMAL_HW_REBOOT (-274000)
> +
> +#define CLOCK_26MHZ_CYCLE_NS (38)
> +#define BUS_ACCESS_US (2)
> +
> +#define FEATURE_DEVICE_AUTO_RCK (BIT(0))
> +#define FEATURE_CK26M_ACTIVE (BIT(1))
> +#define CK26M_ACTIVE (((lvts_data->feature_bitmap & FEATURE_CK26M_ACTIVE) \
> + ? 1 : 0) << 30)
> +#define GET_BASE_ADDR(tc_id) \
> + (lvts_data->domain[lvts_data->tc[tc_id].domain_index].base \
> + + lvts_data->tc[tc_id].addr_offset)
> +
> +#define SET_TC_SPEED_IN_US(pu, gd, fd, sd) \
> + { \
> + .period_unit = (((pu) * 1000) / (256 * CLOCK_26MHZ_CYCLE_NS)), \
> + .group_interval_delay = ((gd) / (pu)), \
> + .filter_interval_delay = ((fd) / (pu)), \
> + .sensor_interval_delay = ((sd) / (pu)), \
> + }
> +
> +#define GET_CAL_DATA_BITMASK(index, h, l) \
> + (((index) < lvts_data->num_efuse_addr) \
> + ? ((lvts_data->efuse[(index)] & GENMASK(h, l)) >> l) \
> + : 0)
> +
> +#define GET_CAL_DATA_BIT(index, bit) \
> + (((index) < lvts_data->num_efuse_addr) \
> + ? ((lvts_data->efuse[index] & BIT(bit)) >> (bit)) \
> + : 0)
> +
> +#define GET_TC_SENSOR_NUM(tc_id) \
> + (lvts_data->tc[tc_id].num_sensor)
> +
> +#define ONE_SAMPLE (lvts_data->counting_window_us + 2 * BUS_ACCESS_US)
> +
> +#define NUM_OF_SAMPLE(tc_id) \
> + ((lvts_data->tc[tc_id].hw_filter < LVTS_FILTER_2) ? 1 : \
> + ((lvts_data->tc[tc_id].hw_filter > LVTS_FILTER_16_OF_18) ? 1 : \
> + ((lvts_data->tc[tc_id].hw_filter == LVTS_FILTER_16_OF_18) ? 18 :\
> + ((lvts_data->tc[tc_id].hw_filter == LVTS_FILTER_8_OF_10) ? 10 : \
> + (lvts_data->tc[tc_id].hw_filter * 2)))))
> +
> +#define PERIOD_UNIT_US(tc_id) \
> + ((lvts_data->tc[tc_id].tc_speed.period_unit * 256 * \
> + CLOCK_26MHZ_CYCLE_NS) / 1000)
> +#define FILTER_INT_US(tc_id) \
> + (lvts_data->tc[tc_id].tc_speed.filter_interval_delay \
> + * PERIOD_UNIT_US(tc_id))
> +#define SENSOR_INT_US(tc_id) \
> + (lvts_data->tc[tc_id].tc_speed.sensor_interval_delay \
> + * PERIOD_UNIT_US(tc_id))
> +#define GROUP_INT_US(tc_id) \
> + (lvts_data->tc[tc_id].tc_speed.group_interval_delay \
> + * PERIOD_UNIT_US(tc_id))
> +
> +#define SENSOR_LATENCY_US(tc_id) \
> + ((NUM_OF_SAMPLE(tc_id) - 1) * FILTER_INT_US(tc_id) \
> + + NUM_OF_SAMPLE(tc_id) * ONE_SAMPLE)
> +
> +#define GROUP_LATENCY_US(tc_id) \
> + (GET_TC_SENSOR_NUM(tc_id) * SENSOR_LATENCY_US(tc_id) \
> + + (GET_TC_SENSOR_NUM(tc_id) - 1) * SENSOR_INT_US(tc_id) \
> + + GROUP_INT_US(tc_id))
> +
> +/*==================================================
> + * LVTS local common code
> + *==================================================
> + */
> +static int lvts_raw_to_temp(struct formula_coeff *co, unsigned int msr_raw)
> +{
> + /* This function returns degree mC */
> +
> + int temp;
> +
> + temp = (co->a * ((unsigned long long)msr_raw)) >> 14;
> + temp = temp + co->golden_temp * 500 + co->b;
> +
> + return temp;
> +}
> +
> +static unsigned int lvts_temp_to_raw(struct formula_coeff *co, int temp)
> +{
> + unsigned int msr_raw = 0;
= 0 can be removed.
> +
> + msr_raw = ((long long)((co->golden_temp * 500 + co->b - temp)) << 14)
> + / (-1 * co->a);
> +
> + return msr_raw;
> +}
> +
> +static int lvts_read_tc_msr_raw(unsigned int *msr_reg)
> +{
> + if (msr_reg == 0)
if (readl(msr_reg) == 0)
> + return 0;
> +
> + return readl(msr_reg) & MRS_RAW_MASK;
> +}
> +
> +static int lvts_read_all_tc_temperature(struct lvts_data *lvts_data)
> +{
> + struct tc_settings *tc = lvts_data->tc;
> + unsigned int i, j, s_index, msr_raw;
> + int max_temp, current_temp;
How about init max_temp to some invalid number (eg. 0)?
> + void __iomem *base;
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + base = GET_BASE_ADDR(i);
> + for (j = 0; j < tc[i].num_sensor; j++) {
> + s_index = tc[i].sensor_map[j];
> +
> + msr_raw = lvts_read_tc_msr_raw(LVTSMSR0_0 + base + 0x4 * j);
> + current_temp = lvts_raw_to_temp(&lvts_data->coeff, msr_raw);
> +
> + if (msr_raw == 0)
> + current_temp = THERMAL_TEMP_INVALID;
> +
> + if (i == 0 && j == 0)
> + max_temp = current_temp;
> + else if (current_temp > max_temp)
> + max_temp = current_temp;
max_temp = max(max_temp, current_temp) here if max_temp is init to 0.
> +
> + lvts_data->sen_data[s_index].msr_raw = msr_raw;
> + lvts_data->sen_data[s_index].temp = current_temp;
> + }
> + }
> +
> + return max_temp;
> +}
> +
> +static int soc_temp_lvts_read_temp(void *data, int *temperature)
> +{
> + struct soc_temp_tz *lvts_tz = (struct soc_temp_tz *)data;
> + struct lvts_data *lvts_data = lvts_tz->lvts_data;
> +
> + if (lvts_tz->id == 0)
> + *temperature = lvts_read_all_tc_temperature(lvts_data);
> + else if (lvts_tz->id - 1 < lvts_data->num_sensor)
> + *temperature = lvts_data->sen_data[lvts_tz->id - 1].temp;
> + else
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> +static const struct thermal_zone_of_device_ops soc_temp_lvts_ops = {
> + .get_temp = soc_temp_lvts_read_temp,
> +};
> +
> +static void lvts_write_device(struct lvts_data *lvts_data, unsigned int data,
> + int tc_id)
> +{
> + void __iomem *base;
> +
> + base = GET_BASE_ADDR(tc_id);
> +
> + writel(data, LVTS_CONFIG_0 + base);
> +
> + usleep_range(5, 15);
> +}
> +
> +static unsigned int lvts_read_device(struct lvts_data *lvts_data,
> + unsigned int reg_idx, int tc_id)
> +{
> + struct device *dev = lvts_data->dev;
> + void __iomem *base;
> + unsigned int data;
> + int ret;
> +
> + base = GET_BASE_ADDR(tc_id);
> + writel(READ_DEVICE_REG(reg_idx), LVTS_CONFIG_0 + base);
> +
> + ret = readl_poll_timeout(LVTS_CONFIG_0 + base, data,
> + !(data & DEVICE_ACCESS_STARTUS),
> + 2, 200);
> + if (ret)
> + dev_err(dev,
> + "Error: LVTS %d DEVICE_ACCESS_START didn't ready\n", tc_id);
> +
> + data = readl(LVTSRDATA0_0 + base);
> +
> + return data;
> +}
> +
> +static void wait_all_tc_sensing_point_idle(struct lvts_data *lvts_data)
> +{
> + struct device *dev = lvts_data->dev;
> + unsigned int mask, error_code, is_error;
> + void __iomem *base;
> + int i, cnt, ret;
> +
> + mask = BIT(10) | BIT(7) | BIT(0);
> +
> + for (cnt = 0; cnt < 2; cnt++) {
> + is_error = 0;
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + base = GET_BASE_ADDR(i);
> + ret = readl_poll_timeout(LVTSMSRCTL1_0 + base, error_code,
> + !(error_code & mask), 2, 200);
> + /*
> + * Error code
> + * 000: IDLE
> + * 001: Write transaction
> + * 010: Waiting for read after Write
> + * 011: Disable Continue fetching on Device
> + * 100: Read transaction
> + * 101: Set Device special Register for Voltage threshold
> + * 111: Set TSMCU number for Fetch
> + */
> + error_code = ((error_code & BIT(10)) >> 8) +
> + ((error_code & BIT(7)) >> 6) +
> + (error_code & BIT(0));
> +
> + if (ret)
> + dev_err(dev,
> + "Error LVTS %d sensing points aren't idle, error_code %d\n",
> + i, error_code);
> +
> + if (error_code != 0)
> + is_error = 1;
> + }
> +
> + if (is_error == 0)
> + break;
> + }
> +}
> +
> +static void lvts_reset(struct lvts_data *lvts_data)
> +{
> + int i;
> +
> + for (i = 0; i < lvts_data->num_domain; i++) {
> + if (lvts_data->domain[i].reset)
> + reset_control_assert(lvts_data->domain[i].reset);
> +
> + if (lvts_data->domain[i].reset)
> + reset_control_deassert(lvts_data->domain[i].reset);
> + }
> +}
> +
> +static void device_identification(struct lvts_data *lvts_data)
> +{
> + struct device *dev = lvts_data->dev;
> + unsigned int i, data;
> + void __iomem *base;
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + base = GET_BASE_ADDR(i);
> +
> + writel(ENABLE_LVTS_CTRL_CLK, LVTSCLKEN_0 + base);
> +
> + lvts_write_device(lvts_data, RESET_ALL_DEVICES, i);
> +
> + lvts_write_device(lvts_data, READ_BACK_DEVICE_ID, i);
> +
> + /* Check LVTS device ID */
> + data = (readl(LVTS_ID_0 + base) & GENMASK(7, 0));
> + if (data != (0x81 + i))
> + dev_err(dev, "LVTS_TC_%d, Device ID should be 0x%x, but 0x%x\n",
> + i, (0x81 + i), data);
> + }
> +}
> +
> +static void disable_all_sensing_points(struct lvts_data *lvts_data)
> +{
> + unsigned int i;
> + void __iomem *base;
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + base = GET_BASE_ADDR(i);
> + writel(DISABLE_SENSING_POINT, LVTSMONCTL0_0 + base);
> + }
> +}
> +
> +static void enable_all_sensing_points(struct lvts_data *lvts_data)
> +{
> + struct device *dev = lvts_data->dev;
> + struct tc_settings *tc = lvts_data->tc;
> + unsigned int i, num;
> + void __iomem *base;
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + base = GET_BASE_ADDR(i);
> + num = tc[i].num_sensor;
> +
> + if (num > ALL_SENSING_POINTS) {
> + dev_err(dev,
> + "%s, LVTS%d, illegal number of sensors: %d\n",
> + __func__, i, tc[i].num_sensor);
> + continue;
> + }
> +
> + writel(ENABLE_SENSING_POINT(num), LVTSMONCTL0_0 + base);
> + }
> +}
> +
> +static void set_polling_speed(struct lvts_data *lvts_data, int tc_id)
> +{
> + struct device *dev = lvts_data->dev;
> + struct tc_settings *tc = lvts_data->tc;
> + unsigned int lvts_mon_ctl_1, lvts_mon_ctl_2;
> + void __iomem *base;
> +
> + base = GET_BASE_ADDR(tc_id);
> +
> + lvts_mon_ctl_1 = ((tc[tc_id].tc_speed.group_interval_delay << 20) & GENMASK(29, 20)) |
> + (tc[tc_id].tc_speed.period_unit & GENMASK(9, 0));
> + lvts_mon_ctl_2 = ((tc[tc_id].tc_speed.filter_interval_delay << 16) & GENMASK(25, 16)) |
> + (tc[tc_id].tc_speed.sensor_interval_delay & GENMASK(9, 0));
> + /*
> + * Clock source of LVTS thermal controller is 26MHz.
> + * Period unit is a base for all interval delays
> + * All interval delays must multiply it to convert a setting to time.
> + * Filter interval delay is a delay between two samples of the same sensor
> + * Sensor interval delay is a delay between two samples of differnet sensors
> + * Group interval delay is a delay between different rounds.
> + * For example:
> + * If Period unit = C, filter delay = 1, sensor delay = 2, group delay = 1,
> + * and two sensors, TS1 and TS2, are in a LVTS thermal controller
> + * and then
> + * Period unit = C * 1/26M * 256 = 12 * 38.46ns * 256 = 118.149us
> + * Filter interval delay = 1 * Period unit = 118.149us
> + * Sensor interval delay = 2 * Period unit = 236.298us
> + * Group interval delay = 1 * Period unit = 118.149us
> + *
> + * TS1 TS1 ... TS1 TS2 TS2 ... TS2 TS1...
> + * <--> Filter interval delay
> + * <--> Sensor interval delay
> + * <--> Group interval delay
> + */
> + writel(lvts_mon_ctl_1, LVTSMONCTL1_0 + base);
> + writel(lvts_mon_ctl_2, LVTSMONCTL2_0 + base);
> +
> + dev_info(dev, "%s %d, LVTSMONCTL1_0= 0x%x,LVTSMONCTL2_0= 0x%x\n",
> + __func__, tc_id, readl(LVTSMONCTL1_0 + base),
> + readl(LVTSMONCTL2_0 + base));
> +}
> +
> +static void set_hw_filter(struct lvts_data *lvts_data, int tc_id)
> +{
> + struct device *dev = lvts_data->dev;
> + struct tc_settings *tc = lvts_data->tc;
> + unsigned int option;
> + void __iomem *base;
> +
> + base = GET_BASE_ADDR(tc_id);
> + option = tc[tc_id].hw_filter & 0x7;
> + /* hw filter
> + * 000: Get one sample
> + * 001: Get 2 samples and average them
> + * 010: Get 4 samples, drop max and min, then average the rest of 2 samples
> + * 011: Get 6 samples, drop max and min, then average the rest of 4 samples
> + * 100: Get 10 samples, drop max and min, then average the rest of 8 samples
> + * 101: Get 18 samples, drop max and min, then average the rest of 16 samples
> + */
> + option = (option << 9) | (option << 6) | (option << 3) | option;
> +
> + writel(option, LVTSMSRCTL0_0 + base);
> + dev_info(dev, "%s %d, LVTSMSRCTL0_0= 0x%x\n",
> + __func__, tc_id, readl(LVTSMSRCTL0_0 + base));
> +}
> +
> +static int get_dominator_index(struct lvts_data *lvts_data, int tc_id)
> +{
> + struct device *dev = lvts_data->dev;
> + struct tc_settings *tc = lvts_data->tc;
> + int d_index;
> +
> + if (tc[tc_id].dominator_sensing_point == ALL_SENSING_POINTS) {
> + d_index = ALL_SENSING_POINTS;
> + } else if (tc[tc_id].dominator_sensing_point <
> + tc[tc_id].num_sensor){
> + d_index = tc[tc_id].dominator_sensing_point;
> + } else {
> + dev_err(dev,
> + "Error: LVTS%d, dominator_sensing_point= %d should smaller than num_sensor= %d\n",
> + tc_id, tc[tc_id].dominator_sensing_point,
> + tc[tc_id].num_sensor);
> +
> + dev_err(dev, "Use the sensing point 0 as the dominated sensor\n");
> + d_index = SENSING_POINT0;
> + }
> +
> + return d_index;
> +}
> +
> +static void disable_hw_reboot_interrupt(struct lvts_data *lvts_data, int tc_id)
> +{
> + unsigned int temp;
> + void __iomem *base;
> +
> + base = GET_BASE_ADDR(tc_id);
> +
> + /* LVTS thermal controller has two interrupts for thermal HW reboot
> + * One is for AP SW and the other is for RGU
> + * The interrupt of AP SW can turn off by a bit of a register, but
> + * the other for RGU cannot.
> + * To prevent rebooting device accidentally, we are going to add
> + * a huge offset to LVTS and make LVTS always report extremely low
> + * temperature.
> + */
> +
> + /* After adding the huge offset 0x3FFF, LVTS alawys adds the
> + * offset to MSR_RAW.
> + * When MSR_RAW is larger, SW will convert lower temperature/
> + */
> + temp = readl(LVTSPROTCTL_0 + base);
> + writel(temp | 0x3FFF, LVTSPROTCTL_0 + base);
> +
> + /* Disable the interrupt of AP SW */
> + temp = readl(LVTSMONINT_0 + base);
> + writel(temp & ~(STAGE3_INT_EN), LVTSMONINT_0 + base);
> +}
> +
> +static void enable_hw_reboot_interrupt(struct lvts_data *lvts_data, int tc_id)
> +{
> + unsigned int temp;
> + void __iomem *base;
> +
> + base = GET_BASE_ADDR(tc_id);
> +
> + /* Enable the interrupt of AP SW */
> + temp = readl(LVTSMONINT_0 + base);
> + writel(temp | STAGE3_INT_EN, LVTSMONINT_0 + base);
> + /* Clear the offset */
> + temp = readl(LVTSPROTCTL_0 + base);
> + writel(temp & ~PROTOFFSET, LVTSPROTCTL_0 + base);
> +}
> +
> +static void set_tc_hw_reboot_threshold(struct lvts_data *lvts_data,
> + int trip_point, int tc_id)
> +{
> + struct device *dev = lvts_data->dev;
> + unsigned int msr_raw, temp, config, d_index;
> + void __iomem *base;
> +
> + base = GET_BASE_ADDR(tc_id);
> + d_index = get_dominator_index(lvts_data, tc_id);
> +
> + dev_info(dev, "%s: LVTS%d, the dominator sensing point= %d\n",
> + __func__, tc_id, d_index);
> +
> + disable_hw_reboot_interrupt(lvts_data, tc_id);
> +
> + temp = readl(LVTSPROTCTL_0 + base);
> + if (d_index == ALL_SENSING_POINTS) {
> + /* Maximum of 4 sensing points */
> + config = (0x1 << 16);
> + writel(config | temp, LVTSPROTCTL_0 + base);
> + } else {
> + /* Select protection sensor */
> + config = ((d_index << 2) + 0x2) << 16;
> + writel(config | temp, LVTSPROTCTL_0 + base);
> + }
> +
> + msr_raw = lvts_temp_to_raw(&lvts_data->coeff, trip_point);
> + writel(msr_raw, LVTSPROTTC_0 + base);
> +
> + enable_hw_reboot_interrupt(lvts_data, tc_id);
> +}
> +
> +static void set_all_tc_hw_reboot(struct lvts_data *lvts_data)
> +{
> + struct tc_settings *tc = lvts_data->tc;
> + int i, trip_point;
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + trip_point = tc[i].hw_reboot_trip_point;
> +
> + if (tc[i].num_sensor == 0)
> + continue;
> +
> + if (trip_point == DISABLE_THERMAL_HW_REBOOT)
> + continue;
> +
> + set_tc_hw_reboot_threshold(lvts_data, trip_point, i);
> + }
> +}
> +
> +static int lvts_init(struct lvts_data *lvts_data)
> +{
> + struct platform_ops *ops = &lvts_data->ops;
> + struct device *dev = lvts_data->dev;
> + int ret;
> +
> + ret = clk_prepare_enable(lvts_data->clk);
> + if (ret)
> + dev_err(dev,
> + "Error: Failed to enable lvts controller clock: %d\n",
> + ret);
should this fail path return with invalid or continue with following setup?
> +
> + lvts_reset(lvts_data);
> +
> + device_identification(lvts_data);
> + if (ops->device_enable_and_init)
> + ops->device_enable_and_init(lvts_data);
> +
> + if (IS_ENABLE(FEATURE_DEVICE_AUTO_RCK)) {
> + if (ops->device_enable_auto_rck)
> + ops->device_enable_auto_rck(lvts_data);
> + } else {
> + if (ops->device_read_count_rc_n)
> + ops->device_read_count_rc_n(lvts_data);
> + }
> +
> + if (ops->set_cal_data)
> + ops->set_cal_data(lvts_data);
> +
> + disable_all_sensing_points(lvts_data);
> + wait_all_tc_sensing_point_idle(lvts_data);
> + if (ops->init_controller)
> + ops->init_controller(lvts_data);
> + enable_all_sensing_points(lvts_data);
> +
> + set_all_tc_hw_reboot(lvts_data);
> +
> + return 0;
> +}
> +
> +static int prepare_calibration_data(struct lvts_data *lvts_data)
> +{
> + struct device *dev = lvts_data->dev;
> + struct sensor_cal_data *cal_data = &lvts_data->cal_data;
> + struct platform_ops *ops = &lvts_data->ops;
> + int i, offset, size;
> + char buffer[512];
> +
> + cal_data->count_r = devm_kcalloc(dev, lvts_data->num_sensor,
> + sizeof(*cal_data->count_r), GFP_KERNEL);
> + if (!cal_data->count_r)
> + return -ENOMEM;
> +
> + cal_data->count_rc = devm_kcalloc(dev, lvts_data->num_sensor,
> + sizeof(*cal_data->count_rc), GFP_KERNEL);
> + if (!cal_data->count_rc)
> + return -ENOMEM;
> +
> + if (ops->efuse_to_cal_data)
> + ops->efuse_to_cal_data(lvts_data);
> +
> + cal_data->use_fake_efuse = 1;
> + if (cal_data->golden_temp != 0) {
> + cal_data->use_fake_efuse = 0;
> + } else {
> + for (i = 0; i < lvts_data->num_sensor; i++) {
> + if (cal_data->count_r[i] != 0 ||
> + cal_data->count_rc[i] != 0) {
> + cal_data->use_fake_efuse = 0;
> + break;
> + }
> + }
> + }
> +
> + if (cal_data->use_fake_efuse) {
> + /* It means all efuse data are equal to 0 */
> + dev_err(dev,
> + "[lvts_cal] This sample is not calibrated, fake !!\n");
> +
> + cal_data->golden_temp = cal_data->default_golden_temp;
> + for (i = 0; i < lvts_data->num_sensor; i++) {
> + cal_data->count_r[i] = cal_data->default_count_r;
> + cal_data->count_rc[i] = cal_data->default_count_rc;
> + }
> + }
> +
> + lvts_data->coeff.golden_temp = cal_data->golden_temp;
> +
> + dev_info(dev, "[lvts_cal] golden_temp = %d\n", cal_data->golden_temp);
> +
> + size = sizeof(buffer);
> + offset = snprintf(buffer, size, "[lvts_cal] num:g_count:g_count_rc ");
> + for (i = 0; i < lvts_data->num_sensor; i++)
> + offset += snprintf(buffer + offset, size - offset, "%d:%d:%d ",
> + i, cal_data->count_r[i], cal_data->count_rc[i]);
> +
> + buffer[offset] = '\0';
> + dev_info(dev, "%s\n", buffer);
> +
> + return 0;
> +}
> +
> +static int get_calibration_data(struct lvts_data *lvts_data)
> +{
> + struct device *dev = lvts_data->dev;
> + char cell_name[8];
> + struct nvmem_cell *cell;
> + u32 *buf;
> + size_t len;
> + int i, j, index = 0, ret;
> +
> + lvts_data->efuse = devm_kcalloc(dev, lvts_data->num_efuse_addr,
> + sizeof(*lvts_data->efuse), GFP_KERNEL);
> + if (!lvts_data->efuse)
> + return -ENOMEM;
> +
> + for (i = 0; i < lvts_data->num_efuse_block; i++) {
> + snprintf(cell_name, sizeof(cell_name), "e_data%d", i + 1);
> + cell = nvmem_cell_get(dev, cell_name);
> + if (IS_ERR(cell)) {
> + dev_err(dev, "Error: Failed to get nvmem cell %s\n", cell_name);
> + return PTR_ERR(cell);
> + }
> +
> + buf = (u32 *)nvmem_cell_read(cell, &len);
> + nvmem_cell_put(cell);
> +
> + if (IS_ERR(buf))
> + return PTR_ERR(buf);
> +
> + for (j = 0; j < (len / sizeof(u32)); j++) {
> + if (index >= lvts_data->num_efuse_addr) {
> + dev_err(dev, "Array efuse is going to overflow");
> + kfree(buf);
> + return -EINVAL;
> + }
> +
> + lvts_data->efuse[index] = buf[j];
> + index++;
> + }
> +
> + kfree(buf);
> + }
> +
> + ret = prepare_calibration_data(lvts_data);
> +
> + return ret;
> +}
> +
> +static int of_update_lvts_data(struct lvts_data *lvts_data,
> + struct platform_device *pdev)
> +{
> + struct device *dev = lvts_data->dev;
> + struct power_domain *domain;
> + struct resource *res;
> + unsigned int i;
> + int ret;
> +
> + lvts_data->clk = devm_clk_get(dev, "lvts_clk");
> + if (IS_ERR(lvts_data->clk))
> + return PTR_ERR(lvts_data->clk);
> +
> + domain = devm_kcalloc(dev, lvts_data->num_domain, sizeof(*domain), GFP_KERNEL);
> + if (!domain)
> + return -ENOMEM;
> +
> + for (i = 0; i < lvts_data->num_domain; i++) {
> + /* Get base address */
> + res = platform_get_resource(pdev, IORESOURCE_MEM, i);
> + if (!res) {
> + dev_err(dev, "No IO resource, index %d\n", i);
> + return -ENXIO;
> + }
> +
> + domain[i].base = devm_ioremap_resource(dev, res);
> + if (IS_ERR(domain[i].base)) {
> + dev_err(dev, "Failed to remap io, index %d\n", i);
> + return PTR_ERR(domain[i].base);
> + }
> +
> + /* Get interrupt number */
> + res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
> + if (!res) {
> + dev_err(dev, "No irq resource, index %d\n", i);
> + return -EINVAL;
> + }
> + domain[i].irq_num = res->start;
> +
> + /* Get reset control */
> + domain[i].reset = devm_reset_control_get_by_index(dev, i);
> + if (IS_ERR(domain[i].reset)) {
> + dev_err(dev, "Failed to get, index %d\n", i);
> + return PTR_ERR(domain[i].reset);
> + }
> + }
> +
> + lvts_data->domain = domain;
> +
> + lvts_data->sen_data = devm_kcalloc(dev, lvts_data->num_sensor,
> + sizeof(*lvts_data->sen_data), GFP_KERNEL);
> + if (!lvts_data->sen_data)
> + return -ENOMEM;
> +
> + ret = get_calibration_data(lvts_data);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static void lvts_device_close(struct lvts_data *lvts_data)
> +{
> + unsigned int i;
> + void __iomem *base;
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + base = GET_BASE_ADDR(i);
> + lvts_write_device(lvts_data, RESET_ALL_DEVICES, i);
> + writel(DISABLE_LVTS_CTRL_CLK, LVTSCLKEN_0 + base);
> + }
> +}
> +
> +static void lvts_close(struct lvts_data *lvts_data)
> +{
> + disable_all_sensing_points(lvts_data);
> + wait_all_tc_sensing_point_idle(lvts_data);
> + lvts_device_close(lvts_data);
> + clk_disable_unprepare(lvts_data->clk);
> +}
> +
> +static void tc_irq_handler(struct lvts_data *lvts_data, int tc_id)
> +{
> + struct device *dev = lvts_data->dev;
> + unsigned int ret = 0;
> + void __iomem *base;
> +
> + base = GET_BASE_ADDR(tc_id);
> +
> + ret = readl(LVTSMONINTSTS_0 + base);
> + /* Write back to clear interrupt status */
> + writel(ret, LVTSMONINTSTS_0 + base);
> +
> + dev_info(dev, "[Thermal IRQ] LVTS thermal controller %d, LVTSMONINTSTS=0x%08x\n",
> + tc_id, ret);
> +
> + if (ret & THERMAL_PROTECTION_STAGE_3)
> + dev_info(dev,
> + "[Thermal IRQ]: Thermal protection stage 3 interrupt triggered\n");
> +}
> +
> +static irqreturn_t irq_handler(int irq, void *dev_id)
> +{
> + struct lvts_data *lvts_data = (struct lvts_data *)dev_id;
> + struct device *dev = lvts_data->dev;
> + struct tc_settings *tc = lvts_data->tc;
> + unsigned int i, *irq_bitmap;
> + void __iomem *base;
> +
> + irq_bitmap = kcalloc(lvts_data->num_domain, sizeof(*irq_bitmap), GFP_ATOMIC);
> +
> + if (!irq_bitmap)
> + return IRQ_NONE;
> +
> + for (i = 0; i < lvts_data->num_domain; i++) {
> + base = lvts_data->domain[i].base;
> + irq_bitmap[i] = readl(THERMINTST + base);
> + dev_info(dev, "%s : THERMINTST = 0x%x\n", __func__, irq_bitmap[i]);
> + }
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + if ((irq_bitmap[tc[i].domain_index] & tc[i].irq_bit) == 0)
> + tc_irq_handler(lvts_data, i);
> + }
> +
> + kfree(irq_bitmap);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int lvts_register_irq_handler(struct lvts_data *lvts_data)
> +{
> + struct device *dev = lvts_data->dev;
> + unsigned int i;
> + int ret;
> +
> + for (i = 0; i < lvts_data->num_domain; i++) {
> + ret = devm_request_irq(dev, lvts_data->domain[i].irq_num, irq_handler,
> + IRQF_TRIGGER_HIGH, "mtk_lvts", lvts_data);
> +
> + if (ret) {
> + dev_err(dev, "Failed to register LVTS IRQ, ret %d, domain %d irq_num %d\n",
> + ret, i, lvts_data->domain[i].irq_num);
> + lvts_close(lvts_data);
> + return ret;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int lvts_register_thermal_zones(struct lvts_data *lvts_data)
> +{
> + struct device *dev = lvts_data->dev;
> + struct thermal_zone_device *tzdev;
> + struct soc_temp_tz *lvts_tz;
> + int i, ret;
> +
> + for (i = 0; i < lvts_data->num_sensor + 1; i++) {
> + lvts_tz = devm_kzalloc(dev, sizeof(*lvts_tz), GFP_KERNEL);
> + if (!lvts_tz) {
> + lvts_close(lvts_data);
> + return -ENOMEM;
> + }
> +
> + lvts_tz->id = i;
> + lvts_tz->lvts_data = lvts_data;
> +
> + tzdev = devm_thermal_zone_of_sensor_register(dev, lvts_tz->id,
> + lvts_tz, &soc_temp_lvts_ops);
> +
> + if (IS_ERR(tzdev)) {
> + ret = PTR_ERR(tzdev);
> + dev_err(dev, "Error: Failed to register lvts tz %d, ret = %d\n",
> + lvts_tz->id, ret);
> + lvts_close(lvts_data);
> + return ret;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int lvts_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct lvts_data *lvts_data;
> + int ret;
> +
> + lvts_data = (struct lvts_data *)of_device_get_match_data(dev);
> +
> + if (!lvts_data) {
> + dev_err(dev, "Error: Failed to get lvts platform data\n");
> + return -ENODATA;
> + }
> +
> + lvts_data->dev = &pdev->dev;
> +
> + ret = of_update_lvts_data(lvts_data, pdev);
> + if (ret)
> + return ret;
> +
> + platform_set_drvdata(pdev, lvts_data);
> +
> + ret = lvts_init(lvts_data);
> + if (ret)
> + return ret;
> +
> + ret = lvts_register_irq_handler(lvts_data);
> + if (ret)
> + return ret;
> +
> + ret = lvts_register_thermal_zones(lvts_data);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int lvts_remove(struct platform_device *pdev)
> +{
> + struct lvts_data *lvts_data;
> +
> + lvts_data = (struct lvts_data *)platform_get_drvdata(pdev);
> +
> + lvts_close(lvts_data);
> +
> + return 0;
> +}
> +
> +static int lvts_suspend(struct platform_device *pdev, pm_message_t state)
> +{
> + struct lvts_data *lvts_data;
> +
> + lvts_data = (struct lvts_data *)platform_get_drvdata(pdev);
> +
> + lvts_close(lvts_data);
> +
> + return 0;
> +}
> +
> +static int lvts_resume(struct platform_device *pdev)
> +{
> + int ret;
> + struct lvts_data *lvts_data;
> +
> + lvts_data = (struct lvts_data *)platform_get_drvdata(pdev);
> +
> + ret = lvts_init(lvts_data);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +/*==================================================
> + * LVTS v4 common code
> + *==================================================
> + */
> +static void device_enable_and_init_v4(struct lvts_data *lvts_data)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + lvts_write_device(lvts_data, STOP_COUNTING_V4, i);
> + lvts_write_device(lvts_data, SET_RG_TSFM_LPDLY_V4, i);
> + lvts_write_device(lvts_data, SET_COUNTING_WINDOW_20US1_V4, i);
> + lvts_write_device(lvts_data, SET_COUNTING_WINDOW_20US2_V4, i);
> + lvts_write_device(lvts_data, TSV2F_CHOP_CKSEL_AND_TSV2F_EN_V4, i);
> + lvts_write_device(lvts_data, TSBG_DEM_CKSEL_X_TSBG_CHOP_EN_V4, i);
> + lvts_write_device(lvts_data, SET_TS_RSV_V4, i);
> + lvts_write_device(lvts_data, SET_TS_EN_V4, i);
> + lvts_write_device(lvts_data, TOGGLE_RG_TSV2F_VCO_RST1_V4, i);
> + lvts_write_device(lvts_data, TOGGLE_RG_TSV2F_VCO_RST2_V4, i);
> + }
> +
> + lvts_data->counting_window_us = 20;
> +}
> +
> +static void device_enable_auto_rck_v4(struct lvts_data *lvts_data)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < lvts_data->num_tc; i++)
> + lvts_write_device(lvts_data, SET_LVTS_AUTO_RCK_V4, i);
> +}
> +
> +static int device_read_count_rc_n_v4(struct lvts_data *lvts_data)
> +{
> + /* Resistor-Capacitor Calibration */
> + /* count_RC_N: count RC now */
> + struct device *dev = lvts_data->dev;
> + struct tc_settings *tc = lvts_data->tc;
> + struct sensor_cal_data *cal_data = &lvts_data->cal_data;
> + unsigned int offset, size, s_index, data;
> + void __iomem *base;
> + int ret, i, j;
> + char buffer[512];
> +
> + cal_data->count_rc_now = devm_kcalloc(dev, lvts_data->num_sensor,
> + sizeof(*cal_data->count_rc_now), GFP_KERNEL);
> + if (!cal_data->count_rc_now)
> + return -ENOMEM;
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + base = GET_BASE_ADDR(i);
> + for (j = 0; j < tc[i].num_sensor; j++) {
> + s_index = tc[i].sensor_map[j];
> +
> + lvts_write_device(lvts_data, SELECT_SENSOR_RCK_V4(j), i);
> + lvts_write_device(lvts_data, SET_DEVICE_SINGLE_MODE_V4, i);
> + usleep_range(10, 20);
> +
> + lvts_write_device(lvts_data, KICK_OFF_RCK_COUNTING_V4, i);
> + usleep_range(30, 40);
> +
> + ret = readl_poll_timeout(LVTS_CONFIG_0 + base, data,
> + !(data & DEVICE_SENSING_STATUS), 2, 200);
> + if (ret)
> + dev_err(dev,
> + "Error: LVTS %d DEVICE_SENSING_STATUS didn't ready\n", i);
> +
> + data = lvts_read_device(lvts_data, 0x00, i);
> +
> + cal_data->count_rc_now[s_index] = (data & GENMASK(23, 0));
> + }
> +
> + /* Recover Setting for Normal Access on
> + * temperature fetch
> + */
> + lvts_write_device(lvts_data, SET_SENSOR_NO_RCK_V4, i);
> + lvts_write_device(lvts_data, SET_DEVICE_LOW_POWER_SINGLE_MODE_V4, i);
> + }
> +
> + size = sizeof(buffer);
> + offset = snprintf(buffer, size, "[COUNT_RC_NOW] ");
> + for (i = 0; i < lvts_data->num_sensor; i++)
> + offset += snprintf(buffer + offset, size - offset, "%d:%d ",
> + i, cal_data->count_rc_now[i]);
> +
> + buffer[offset] = '\0';
> + dev_info(dev, "%s\n", buffer);
> +
> + return 0;
> +}
> +
> +static void set_calibration_data_v4(struct lvts_data *lvts_data)
> +{
> + struct tc_settings *tc = lvts_data->tc;
> + struct sensor_cal_data *cal_data = &lvts_data->cal_data;
> + unsigned int i, j, s_index, e_data;
> + void __iomem *base;
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + base = GET_BASE_ADDR(i);
> +
> + for (j = 0; j < tc[i].num_sensor; j++) {
> + s_index = tc[i].sensor_map[j];
> + if (IS_ENABLE(FEATURE_DEVICE_AUTO_RCK))
> + e_data = cal_data->count_r[s_index];
> + else
> + e_data = (((unsigned long long)
> + cal_data->count_rc_now[s_index]) *
> + cal_data->count_r[s_index]) >> 14;
> +
> + writel(e_data, LVTSEDATA00_0 + base + 0x4 * j);
> + }
> + }
> +}
> +
> +static void init_controller_v4(struct lvts_data *lvts_data)
> +{
> + struct device *dev = lvts_data->dev;
> + unsigned int i;
> + void __iomem *base;
> +
> + for (i = 0; i < lvts_data->num_tc; i++) {
> + base = GET_BASE_ADDR(i);
> +
> + lvts_write_device(lvts_data, SET_DEVICE_LOW_POWER_SINGLE_MODE_V4, i);
> +
> + writel(SET_SENSOR_INDEX, LVTSTSSEL_0 + base);
> + writel(SET_CALC_SCALE_RULES, LVTSCALSCALE_0 + base);
> +
> + set_polling_speed(lvts_data, i);
> + set_hw_filter(lvts_data, i);
> +
> + dev_info(dev, "lvts%d: read all %d sensors in %d us, one in %d us\n",
> + i, GET_TC_SENSOR_NUM(i), GROUP_LATENCY_US(i), SENSOR_LATENCY_US(i));
> + }
> +}
> +
> +/*==================================================
> + * LVTS MT6873
> + *==================================================
> + */
> +
> +#define MT6873_NUM_LVTS (ARRAY_SIZE(mt6873_tc_settings))
> +
> +enum mt6873_lvts_domain {
> + MT6873_AP_DOMAIN,
> + MT6873_MCU_DOMAIN,
> + MT6873_NUM_DOMAIN
> +};
> +
> +enum mt6873_lvts_sensor_enum {
> + MT6873_TS1_0,
> + MT6873_TS1_1,
> + MT6873_TS2_0,
> + MT6873_TS2_1,
> + MT6873_TS3_0,
> + MT6873_TS3_1,
> + MT6873_TS3_2,
> + MT6873_TS3_3,
> + MT6873_TS4_0,
> + MT6873_TS4_1,
> + MT6873_TS5_0,
> + MT6873_TS5_1,
> + MT6873_TS6_0,
> + MT6873_TS6_1,
> + MT6873_TS7_0,
> + MT6873_TS7_1,
> + MT6873_TS7_2,
> + MT6873_NUM_TS
> +};
> +
> +static void mt6873_efuse_to_cal_data(struct lvts_data *lvts_data)
> +{
> + struct sensor_cal_data *cal_data = &lvts_data->cal_data;
> +
> + cal_data->golden_temp = GET_CAL_DATA_BITMASK(0, 31, 24);
> + cal_data->count_r[MT6873_TS1_0] = GET_CAL_DATA_BITMASK(1, 23, 0);
> + cal_data->count_r[MT6873_TS1_1] = GET_CAL_DATA_BITMASK(2, 23, 0);
> + cal_data->count_r[MT6873_TS2_0] = GET_CAL_DATA_BITMASK(3, 23, 0);
> + cal_data->count_r[MT6873_TS2_1] = GET_CAL_DATA_BITMASK(4, 23, 0);
> + cal_data->count_r[MT6873_TS3_0] = GET_CAL_DATA_BITMASK(5, 23, 0);
> + cal_data->count_r[MT6873_TS3_1] = GET_CAL_DATA_BITMASK(6, 23, 0);
> + cal_data->count_r[MT6873_TS3_2] = GET_CAL_DATA_BITMASK(7, 23, 0);
> + cal_data->count_r[MT6873_TS3_3] = GET_CAL_DATA_BITMASK(8, 23, 0);
> + cal_data->count_r[MT6873_TS4_0] = GET_CAL_DATA_BITMASK(9, 23, 0);
> + cal_data->count_r[MT6873_TS4_1] = GET_CAL_DATA_BITMASK(10, 23, 0);
> + cal_data->count_r[MT6873_TS5_0] = GET_CAL_DATA_BITMASK(11, 23, 0);
> + cal_data->count_r[MT6873_TS5_1] = GET_CAL_DATA_BITMASK(12, 23, 0);
> + cal_data->count_r[MT6873_TS6_0] = GET_CAL_DATA_BITMASK(13, 23, 0);
> + cal_data->count_r[MT6873_TS6_1] = GET_CAL_DATA_BITMASK(14, 23, 0);
> + cal_data->count_r[MT6873_TS7_0] = GET_CAL_DATA_BITMASK(15, 23, 0);
> + cal_data->count_r[MT6873_TS7_1] = GET_CAL_DATA_BITMASK(16, 23, 0);
> + cal_data->count_r[MT6873_TS7_2] = GET_CAL_DATA_BITMASK(17, 23, 0);
> +
> + cal_data->count_rc[MT6873_TS1_0] = GET_CAL_DATA_BITMASK(21, 23, 0);
> +
> + cal_data->count_rc[MT6873_TS2_0] = (GET_CAL_DATA_BITMASK(1, 31, 24) << 16) +
> + (GET_CAL_DATA_BITMASK(2, 31, 24) << 8) +
> + GET_CAL_DATA_BITMASK(3, 31, 24);
> +
> + cal_data->count_rc[MT6873_TS3_0] = (GET_CAL_DATA_BITMASK(4, 31, 24) << 16) +
> + (GET_CAL_DATA_BITMASK(5, 31, 24) << 8) +
> + GET_CAL_DATA_BITMASK(6, 31, 24);
> +
> + cal_data->count_rc[MT6873_TS4_0] = (GET_CAL_DATA_BITMASK(7, 31, 24) << 16) +
> + (GET_CAL_DATA_BITMASK(8, 31, 24) << 8) +
> + GET_CAL_DATA_BITMASK(9, 31, 24);
> +
> + cal_data->count_rc[MT6873_TS5_0] = (GET_CAL_DATA_BITMASK(10, 31, 24) << 16) +
> + (GET_CAL_DATA_BITMASK(11, 31, 24) << 8) +
> + GET_CAL_DATA_BITMASK(12, 31, 24);
> +
> + cal_data->count_rc[MT6873_TS6_0] = (GET_CAL_DATA_BITMASK(13, 31, 24) << 16) +
> + (GET_CAL_DATA_BITMASK(14, 31, 24) << 8) +
> + GET_CAL_DATA_BITMASK(15, 31, 24);
> +
> + cal_data->count_rc[MT6873_TS7_0] = (GET_CAL_DATA_BITMASK(16, 31, 24) << 16) +
> + (GET_CAL_DATA_BITMASK(17, 31, 24) << 8) +
> + GET_CAL_DATA_BITMASK(18, 31, 24);
> +}
> +
> +static struct tc_settings mt6873_tc_settings[] = {
> + [0] = {
> + .domain_index = MT6873_MCU_DOMAIN,
> + .addr_offset = 0x0,
> + .num_sensor = 2,
> + .sensor_map = {MT6873_TS1_0, MT6873_TS1_1},
> + .tc_speed = SET_TC_SPEED_IN_US(118, 118, 118, 118),
> + .hw_filter = LVTS_FILTER_2_OF_4,
> + .dominator_sensing_point = SENSING_POINT1,
> + .hw_reboot_trip_point = 117000,
> + .irq_bit = BIT(3),
> + },
> + [1] = {
> + .domain_index = MT6873_MCU_DOMAIN,
> + .addr_offset = 0x100,
> + .num_sensor = 2,
> + .sensor_map = {MT6873_TS2_0, MT6873_TS2_1},
> + .tc_speed = SET_TC_SPEED_IN_US(118, 118, 118, 118),
> + .hw_filter = LVTS_FILTER_2_OF_4,
> + .dominator_sensing_point = SENSING_POINT0,
> + .hw_reboot_trip_point = 117000,
> + .irq_bit = BIT(4),
> + },
> + [2] = {
> + .domain_index = MT6873_MCU_DOMAIN,
> + .addr_offset = 0x200,
> + .num_sensor = 4,
> + .sensor_map = {MT6873_TS3_0, MT6873_TS3_1, MT6873_TS3_2, MT6873_TS3_3},
> + .tc_speed = SET_TC_SPEED_IN_US(118, 118, 118, 118),
> + .hw_filter = LVTS_FILTER_2_OF_4,
> + .dominator_sensing_point = SENSING_POINT0,
> + .hw_reboot_trip_point = 117000,
> + .irq_bit = BIT(5),
> + },
> + [3] = {
> + .domain_index = MT6873_AP_DOMAIN,
> + .addr_offset = 0x0,
> + .num_sensor = 2,
> + .sensor_map = {MT6873_TS4_0, MT6873_TS4_1},
> + .tc_speed = SET_TC_SPEED_IN_US(118, 118, 118, 118),
> + .hw_filter = LVTS_FILTER_2_OF_4,
> + .dominator_sensing_point = SENSING_POINT0,
> + .hw_reboot_trip_point = 117000,
> + .irq_bit = BIT(3),
> + },
> + [4] = {
> + .domain_index = MT6873_AP_DOMAIN,
> + .addr_offset = 0x100,
> + .num_sensor = 2,
> + .sensor_map = {MT6873_TS5_0, MT6873_TS5_1},
> + .tc_speed = SET_TC_SPEED_IN_US(118, 118, 118, 118),
> + .hw_filter = LVTS_FILTER_2_OF_4,
> + .dominator_sensing_point = SENSING_POINT1,
> + .hw_reboot_trip_point = 117000,
> + .irq_bit = BIT(4),
> + },
> + [5] = {
> + .domain_index = MT6873_AP_DOMAIN,
> + .addr_offset = 0x200,
> + .num_sensor = 2,
> + .sensor_map = {MT6873_TS6_0, MT6873_TS6_1},
> + .tc_speed = SET_TC_SPEED_IN_US(118, 118, 118, 118),
> + .hw_filter = LVTS_FILTER_2_OF_4,
> + .dominator_sensing_point = SENSING_POINT1,
> + .hw_reboot_trip_point = 117000,
> + .irq_bit = BIT(5),
> + },
> + [6] = {
> + .domain_index = MT6873_AP_DOMAIN,
> + .addr_offset = 0x300,
> + .num_sensor = 3,
> + .sensor_map = {MT6873_TS7_0, MT6873_TS7_1, MT6873_TS7_2},
> + .tc_speed = SET_TC_SPEED_IN_US(118, 118, 118, 118),
> + .hw_filter = LVTS_FILTER_2_OF_4,
> + .dominator_sensing_point = SENSING_POINT2,
> + .hw_reboot_trip_point = 117000,
> + .irq_bit = BIT(6),
> + }
> +};
> +
> +static struct lvts_data mt6873_lvts_data = {
> + .num_domain = MT6873_NUM_DOMAIN,
> + .num_tc = MT6873_NUM_LVTS,
> + .tc = mt6873_tc_settings,
> + .num_sensor = MT6873_NUM_TS,
> + .ops = {
> + .efuse_to_cal_data = mt6873_efuse_to_cal_data,
> + .device_enable_and_init = device_enable_and_init_v4,
> + .device_enable_auto_rck = device_enable_auto_rck_v4,
> + .device_read_count_rc_n = device_read_count_rc_n_v4,
> + .set_cal_data = set_calibration_data_v4,
> + .init_controller = init_controller_v4,
> + },
> + .feature_bitmap = FEATURE_DEVICE_AUTO_RCK,
> + .num_efuse_addr = 22,
> + .num_efuse_block = 1,
> + .cal_data = {
> + .default_golden_temp = 50,
> + .default_count_r = 35000,
> + .default_count_rc = 2750,
> + },
> + .coeff = {
> + .a = -250460,
> + .b = 250460,
> + },
> +};
> +
> +/*==================================================
> + *==================================================
> + * Support chips
> + *==================================================
> + */
> +static const struct of_device_id lvts_of_match[] = {
> + {
> + .compatible = "mediatek,mt6873-lvts",
> + .data = (void *)&mt6873_lvts_data,
> + },
> + {
> + },
> +};
> +MODULE_DEVICE_TABLE(of, lvts_of_match);
> +/*==================================================*/
> +static struct platform_driver soc_temp_lvts = {
> + .probe = lvts_probe,
> + .remove = lvts_remove,
> + .suspend = lvts_suspend,
> + .resume = lvts_resume,
> + .driver = {
> + .name = "mtk-soc-temp-lvts",
> + .of_match_table = lvts_of_match,
> + },
> +};
> +
> +module_platform_driver(soc_temp_lvts);
> +MODULE_AUTHOR("Yu-Chia Chang <ethan.chang@xxxxxxxxxxxx>");
> +MODULE_AUTHOR("Michael Kao <michael.kao@xxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("Mediatek soc temperature driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/thermal/mediatek/soc_temp_lvts.h b/drivers/thermal/mediatek/soc_temp_lvts.h
> new file mode 100644
> index 000000000000..1d90bdec53c6
> --- /dev/null
> +++ b/drivers/thermal/mediatek/soc_temp_lvts.h
> @@ -0,0 +1,312 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (c) 2020 MediaTek Inc.
> + */
> +
> +#ifndef __MTK_SOC_TEMP_LVTS_H__
> +#define __MTK_SOC_TEMP_LVTS_H__
> +
> +/* LVTS HW filter settings
> + * 000: Get one sample
> + * 001: Get 2 samples and average them
> + * 010: Get 4 samples, drop max and min, then average the rest of 2 samples
> + * 011: Get 6 samples, drop max and min, then average the rest of 4 samples
> + * 100: Get 10 samples, drop max and min, then average the rest of 8 samples
> + * 101: Get 18 samples, drop max and min, then average the rest of 16 samples
> + */
> +enum lvts_hw_filter {
> + LVTS_FILTER_1,
> + LVTS_FILTER_2,
> + LVTS_FILTER_2_OF_4,
> + LVTS_FILTER_4_OF_6,
> + LVTS_FILTER_8_OF_10,
> + LVTS_FILTER_16_OF_18
> +};
> +
> +enum lvts_sensing_point {
> + SENSING_POINT0,
> + SENSING_POINT1,
> + SENSING_POINT2,
> + SENSING_POINT3,
> + ALL_SENSING_POINTS
> +};
> +
> +/*==================================================
> + * Data structure
> + *==================================================
> + */
> +struct lvts_data;
> +
> +struct speed_settings {
> + unsigned int period_unit;
> + unsigned int group_interval_delay;
> + unsigned int filter_interval_delay;
> + unsigned int sensor_interval_delay;
> +};
> +
> +struct tc_settings {
> + unsigned int domain_index;
> + unsigned int addr_offset;
> + unsigned int num_sensor;
> + unsigned int sensor_map[ALL_SENSING_POINTS]; /* In sensor ID */
> + struct speed_settings tc_speed;
> + /* HW filter setting
> + * 000: Get one sample
> + * 001: Get 2 samples and average them
> + * 010: Get 4 samples, drop max and min, then average the rest of 2 samples
> + * 011: Get 6 samples, drop max and min, then average the rest of 4 samples
> + * 100: Get 10 samples, drop max and min, then average the rest of 8 samples
> + * 101: Get 18 samples, drop max and min, then average the rest of 16 samples
> + */
> + unsigned int hw_filter;
> + /* Dominator_sensing point is used to select a sensing point
> + * and reference its temperature to trigger Thermal HW Reboot
> + * When it is ALL_SENSING_POINTS, it will select all sensing points
> + */
> + int dominator_sensing_point;
> + int hw_reboot_trip_point; /* -274000: Disable HW reboot */
> + unsigned int irq_bit;
> +};
> +
> +struct formula_coeff {
> + int a;
> + int b;
> + unsigned int golden_temp;
> +};
> +
> +struct sensor_cal_data {
> + int use_fake_efuse; /* 1: Use fake efuse, 0: Use real efuse */
> + unsigned int golden_temp;
> + unsigned int *count_r;
> + unsigned int *count_rc;
> + unsigned int *count_rc_now;
> +
> + unsigned int default_golden_temp;
> + unsigned int default_count_r;
> + unsigned int default_count_rc;
> +};
> +
> +struct platform_ops {
> + void (*efuse_to_cal_data)(struct lvts_data *lvts_data);
> + void (*device_enable_and_init)(struct lvts_data *lvts_data);
> + void (*device_enable_auto_rck)(struct lvts_data *lvts_data);
> + int (*device_read_count_rc_n)(struct lvts_data *lvts_data);
> + void (*set_cal_data)(struct lvts_data *lvts_data);
> + void (*init_controller)(struct lvts_data *lvts_data);
> +};
> +
> +struct power_domain {
> + void __iomem *base; /* LVTS base addresses */
> + unsigned int irq_num; /* LVTS interrupt numbers */
> + struct reset_control *reset;
> +};
> +
> +struct sensor_data {
> + int temp; /* Current temperature */
> + unsigned int msr_raw; /* MSR raw data from LVTS */
> +};
> +
> +struct lvts_data {
> + struct device *dev;
> + struct clk *clk;
> + unsigned int num_domain;
> + struct power_domain *domain;
> +
> + int num_tc; /* Number of LVTS thermal controllers */
> + struct tc_settings *tc;
> + int counting_window_us; /* LVTS device counting window */
> +
> + int num_sensor; /* Number of sensors in this platform */
> + struct sensor_data *sen_data;
> +
> + struct platform_ops ops;
> + int feature_bitmap; /* Show what features are enabled */
> +
> + unsigned int num_efuse_addr;
> + unsigned int *efuse;
> + unsigned int num_efuse_block; /* Number of contiguous efuse indexes */
> + struct sensor_cal_data cal_data;
> + struct formula_coeff coeff;
> +};
> +
> +struct soc_temp_tz {
> + unsigned int id; /* if id is 0, get max temperature of all sensors */
> + struct lvts_data *lvts_data;
> +};
> +
> +struct match_entry {
> + char chip[32];
> + struct lvts_data *lvts_data;
> +};
> +
> +struct lvts_match_data {
> + unsigned int hw_version;
> + struct match_entry *table;
> + void (*set_up_common_callbacks)(struct lvts_data *lvts_data);
> + struct list_head node;
> +};
> +
> +struct lvts_id {
> + unsigned int hw_version;
> + char chip[32];
> +};
> +
> +/*==================================================
> + * LVTS device register
> + *==================================================
> + */
> +#define RG_TSFM_DATA_0 0x00
> +#define RG_TSFM_DATA_1 0x01
> +#define RG_TSFM_DATA_2 0x02
> +#define RG_TSFM_CTRL_0 0x03
> +#define RG_TSFM_CTRL_1 0x04
> +#define RG_TSFM_CTRL_2 0x05
> +#define RG_TSFM_CTRL_3 0x06
> +#define RG_TSFM_CTRL_4 0x07
> +#define RG_TSV2F_CTRL_0 0x08
> +#define RG_TSV2F_CTRL_1 0x09
> +#define RG_TSV2F_CTRL_2 0x0A
> +#define RG_TSV2F_CTRL_3 0x0B
> +#define RG_TSV2F_CTRL_4 0x0C
> +#define RG_TSV2F_CTRL_5 0x0D
> +#define RG_TSV2F_CTRL_6 0x0E
> +#define RG_TEMP_DATA_0 0x10
> +#define RG_TEMP_DATA_1 0x11
> +#define RG_TEMP_DATA_2 0x12
> +#define RG_TEMP_DATA_3 0x13
> +#define RG_RC_DATA_0 0x14
> +#define RG_RC_DATA_1 0x15
> +#define RG_RC_DATA_2 0x16
> +#define RG_RC_DATA_3 0x17
> +#define RG_DIV_DATA_0 0x18
> +#define RG_DIV_DATA_1 0x19
> +#define RG_DIV_DATA_2 0x1A
> +#define RG_DIV_DATA_3 0x1B
> +#define RG_TST_DATA_0 0x70
> +#define RG_TST_DATA_1 0x71
> +#define RG_TST_DATA_2 0x72
> +#define RG_TST_CTRL 0x73
> +#define RG_DBG_FQMTR 0xF0
> +#define RG_DBG_LPSEQ 0xF1
> +#define RG_DBG_STATE 0xF2
> +#define RG_DBG_CHKSUM 0xF3
> +#define RG_DID_LVTS 0xFC
> +#define RG_DID_REV 0xFD
> +#define RG_TSFM_RST 0xFF
> +/*==================================================
> + * LVTS controller register
> + *==================================================
> + */
> +#define LVTSMONCTL0_0 0x000
> +#define LVTS_SINGLE_SENSE BIT(9)
> +#define ENABLE_SENSING_POINT(num) (LVTS_SINGLE_SENSE | GENMASK(((num) - 1), 0))
> +#define DISABLE_SENSING_POINT (LVTS_SINGLE_SENSE | 0x0)
> +#define LVTSMONCTL1_0 0x004
> +#define LVTSMONCTL2_0 0x008
> +#define LVTSMONINT_0 0x00C
> +#define STAGE3_INT_EN BIT(31)
> +#define LVTSMONINTSTS_0 0x010
> +#define LVTSMONIDET0_0 0x014
> +#define LVTSMONIDET1_0 0x018
> +#define LVTSMONIDET2_0 0x01C
> +#define LVTSMONIDET3_0 0x020
> +#define LVTSH2NTHRE_0 0x024
> +#define LVTSHTHRE_0 0x028
> +#define LVTSCTHRE_0 0x02C
> +#define LVTSOFFSETH_0 0x030
> +#define LVTSOFFSETL_0 0x034
> +#define LVTSMSRCTL0_0 0x038
> +#define LVTSMSRCTL1_0 0x03C
> +#define LVTSTSSEL_0 0x040
> +#define SET_SENSOR_INDEX 0x13121110
> +#define LVTSDEVICETO_0 0x044
> +#define LVTSCALSCALE_0 0x048
> +#define SET_CALC_SCALE_RULES 0x00000300
> +#define LVTS_ID_0 0x04C
> +#define LVTS_CONFIG_0 0x050
> +
> +#define BROADCAST_ID_UPDATE BIT(26)
> +#define DEVICE_SENSING_STATUS BIT(25)
> +#define DEVICE_ACCESS_STARTUS BIT(24)
> +#define WRITE_ACCESS BIT(16)
> +#define DEVICE_WRITE (BIT(31) | CK26M_ACTIVE | DEVICE_ACCESS_STARTUS \
> + | BIT(17) | WRITE_ACCESS)
> +#define DEVICE_READ (BIT(31) | CK26M_ACTIVE | DEVICE_ACCESS_STARTUS \
> + | 1 << 17)
> +#define RESET_ALL_DEVICES (DEVICE_WRITE | RG_TSFM_RST << 8 | 0xFF)
> +#define READ_BACK_DEVICE_ID (BIT(31) | CK26M_ACTIVE | BROADCAST_ID_UPDATE \
> + | DEVICE_ACCESS_STARTUS | BIT(17) \
> + | RG_DID_LVTS << 8)
> +#define READ_DEVICE_REG(reg_idx) (DEVICE_READ | (reg_idx) << 8 | 0x00)
> +#define LVTSEDATA00_0 0x054
> +#define LVTSEDATA01_0 0x058
> +#define LVTSEDATA02_0 0x05C
> +#define LVTSEDATA03_0 0x060
> +#define LVTSMSR0_0 0x090
> +#define MRS_RAW_MASK GENMASK(15, 0)
> +#define MRS_RAW_VALID_BIT BIT(16)
> +#define LVTSMSR1_0 0x094
> +#define LVTSMSR2_0 0x098
> +#define LVTSMSR3_0 0x09C
> +#define LVTSIMMD0_0 0x0A0
> +#define LVTSIMMD1_0 0x0A4
> +#define LVTSIMMD2_0 0x0A8
> +#define LVTSIMMD3_0 0x0AC
> +#define LVTSRDATA0_0 0x0B0
> +#define LVTSRDATA1_0 0x0B4
> +#define LVTSRDATA2_0 0x0B8
> +#define LVTSRDATA3_0 0x0BC
> +#define LVTSPROTCTL_0 0x0C0
> +#define PROTOFFSET GENMASK(15, 0)
> +#define LVTSPROTTA_0 0x0C4
> +#define LVTSPROTTB_0 0x0C8
> +#define LVTSPROTTC_0 0x0CC
> +#define LVTSCLKEN_0 0x0E4
> +#define ENABLE_LVTS_CTRL_CLK (1)
> +#define DISABLE_LVTS_CTRL_CLK (0)
> +#define LVTSDBGSEL_0 0x0E8
> +#define LVTSDBGSIG_0 0x0EC
> +#define LVTSSPARE0_0 0x0F0
> +#define LVTSSPARE1_0 0x0F4
> +#define LVTSSPARE2_0 0x0F8
> +#define LVTSSPARE3_0 0x0FC
> +
> +#define THERMINTST 0xF04
> +/*==================================================
> + * LVTS register mask
> + *==================================================
> + */
> +#define THERMAL_COLD_INTERRUPT_0 0x00000001
> +#define THERMAL_HOT_INTERRUPT_0 0x00000002
> +#define THERMAL_LOW_OFFSET_INTERRUPT_0 0x00000004
> +#define THERMAL_HIGH_OFFSET_INTERRUPT_0 0x00000008
> +#define THERMAL_HOT2NORMAL_INTERRUPT_0 0x00000010
> +#define THERMAL_COLD_INTERRUPT_1 0x00000020
> +#define THERMAL_HOT_INTERRUPT_1 0x00000040
> +#define THERMAL_LOW_OFFSET_INTERRUPT_1 0x00000080
> +#define THERMAL_HIGH_OFFSET_INTERRUPT_1 0x00000100
> +#define THERMAL_HOT2NORMAL_INTERRUPT_1 0x00000200
> +#define THERMAL_COLD_INTERRUPT_2 0x00000400
> +#define THERMAL_HOT_INTERRUPT_2 0x00000800
> +#define THERMAL_LOW_OFFSET_INTERRUPT_2 0x00001000
> +#define THERMAL_HIGH_OFFSET_INTERRUPT_2 0x00002000
> +#define THERMAL_HOT2NORMAL_INTERRUPT_2 0x00004000
> +#define THERMAL_AHB_TIMEOUT_INTERRUPT 0x00008000
> +#define THERMAL_DEVICE_TIMEOUT_INTERRUPT 0x00008000
> +#define THERMAL_IMMEDIATE_INTERRUPT_0 0x00010000
> +#define THERMAL_IMMEDIATE_INTERRUPT_1 0x00020000
> +#define THERMAL_IMMEDIATE_INTERRUPT_2 0x00040000
> +#define THERMAL_FILTER_INTERRUPT_0 0x00080000
> +#define THERMAL_FILTER_INTERRUPT_1 0x00100000
> +#define THERMAL_FILTER_INTERRUPT_2 0x00200000
> +#define THERMAL_COLD_INTERRUPT_3 0x00400000
> +#define THERMAL_HOT_INTERRUPT_3 0x00800000
> +#define THERMAL_LOW_OFFSET_INTERRUPT_3 0x01000000
> +#define THERMAL_HIGH_OFFSET_INTERRUPT_3 0x02000000
> +#define THERMAL_HOT2NORMAL_INTERRUPT_3 0x04000000
> +#define THERMAL_IMMEDIATE_INTERRUPT_3 0x08000000
> +#define THERMAL_FILTER_INTERRUPT_3 0x10000000
> +#define THERMAL_PROTECTION_STAGE_1 0x20000000
> +#define THERMAL_PROTECTION_STAGE_2 0x40000000
> +#define THERMAL_PROTECTION_STAGE_3 0x80000000
> +#endif /* __MTK_SOC_TEMP_LVTS_H__ */
> --
> 2.18.0
>