From: Michael Kao <[email protected]>
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 <[email protected]>
Signed-off-by: Michael Kao <[email protected]>
Signed-off-by: Ben Tseng <[email protected]>
---
drivers/thermal/mediatek/Kconfig | 10 +
drivers/thermal/mediatek/Makefile | 1 +
drivers/thermal/mediatek/soc_temp_lvts.c | 1287 ++++++++++++++++++++++
drivers/thermal/mediatek/soc_temp_lvts.h | 312 ++++++
4 files changed, 1610 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..8153edaaf815
--- /dev/null
+++ b/drivers/thermal/mediatek/soc_temp_lvts.c
@@ -0,0 +1,1287 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020 MediaTek Inc.
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.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/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/thermal.h>
+#include "soc_temp_lvts.h"
+
+/*==================================================
+ * 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;
+
+ msr_raw = div_s64((s64)((co->golden_temp * 500 + co->b - temp)) << 14,
+ (-1 * co->a));
+
+ return msr_raw;
+}
+
+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 = 0, current_temp;
+ 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 = readl(LVTSMSR0_0 + base + 0x4 * j) & MRS_RAW_MASK;
+ current_temp = lvts_raw_to_temp(&lvts_data->coeff, msr_raw);
+
+ if (msr_raw == 0)
+ current_temp = THERMAL_TEMP_INVALID;
+
+ max_temp = max(max_temp, current_temp);
+
+ 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);
+ return ret;
+ }
+
+ 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)) {
+ if (lvts_tz->id != 0)
+ return 0;
+
+ 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 <[email protected]>");
+MODULE_AUTHOR("Michael Kao <[email protected]>");
+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
On 17/06/2021 13:47, Ben Tseng wrote:
> From: Michael Kao <[email protected]>
>
> 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.
I think we already talked about that. We don't want a thermal sensor
driver to aggregate the temperatures but create some kindof virtual
sensor with a property (min, max, avg, ...) which is usable by anyone.
[ ... ]
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On Mon, 2021-06-21 at 13:26 +0200, Daniel Lezcano wrote:
> On 17/06/2021 13:47, Ben Tseng wrote:
> > From: Michael Kao <[email protected]>
> >
> > 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.
>
> I think we already talked about that. We don't want a thermal sensor
> driver to aggregate the temperatures but create some kindof virtual
> sensor with a property (min, max, avg, ...) which is usable by
> anyone.
>
> [ ... ]
>
>
>
Dear Daniel,
Sorry for the late reply.
After survey ,I'm not sure whether the patch[1] is the architecture of
virtual thermal sensor which you commented.
Or, is there any existing framework on mainline already support virtual
sensor?
Could you help to provide reference to us?
Thank you so much.
[1]
https://patchwork.kernel.org/project/linux-pm/patch/[email protected]/
BRs
Ben
Hi Ben,
On 23/07/2021 08:17, Ben Tseng wrote:
> On Mon, 2021-06-21 at 13:26 +0200, Daniel Lezcano wrote:
>> On 17/06/2021 13:47, Ben Tseng wrote:
>>> From: Michael Kao <[email protected]>
>>>
>>> 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.
>>
>> I think we already talked about that. We don't want a thermal sensor
>> driver to aggregate the temperatures but create some kindof virtual
>> sensor with a property (min, max, avg, ...) which is usable by
>> anyone.
>>
>> [ ... ]
>>
>>
>>
>
> Dear Daniel,
>
> Sorry for the late reply.
sorry too, missed to answer. Another thread pointed to this one and I
figured out I forgot to answer.
> After survey ,I'm not sure whether the patch[1] is the architecture of
> virtual thermal sensor which you commented.
Ah, yes that is kind of what it would be requested but really generic so
anyone can use it.
> Or, is there any existing framework on mainline already support virtual
> sensor?
No unfortunately, it is not done [yet].
> Could you help to provide reference to us?
Ok, we had this discussion several times on the mailing list and at the
different events like the Linux Plumbers conference. But I was not able
to find out a pointer.
Basically the idea is simple, we don't want drivers doing weird things
in their get_temp callback. This callback must return the temperature
associated to a physical sensor in a 1:1 manner.
However, some people want to define a thermal zone but with an
aggregation of different sensors.
At this point, we are unsure how to do that.
Having a virtual sensor would be more adequate as it won't impact
anything except the DT for a configuration. And we can make it to evolve
without having to change all the thermal framework internals.
From a DT point of view, a virtual sensor device cuold have phandles to
the different sensors and let's say a property telling what do to (avg,
min, max, ...). The thermal zone will point to the virtual device.
In the driver itself, the get_temp will just call get_temp of all the
sensors and do the operation specified in the property.
With that, the drivers stay consistent and we have the flexibility to do
whatever we want.
Does it make sense ?
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Il 17/06/21 13:47, Ben Tseng ha scritto:
> From: Michael Kao <[email protected]>
>
> 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 <[email protected]>
> Signed-off-by: Michael Kao <[email protected]>
> Signed-off-by: Ben Tseng <[email protected]>
Hello Ben,
are you still interested in upstreaming this driver?
Having thermal sensors is pretty much important to avoid damaging
the hardware, and MT8195 is being actively upstreamed right now.
Reading thermals is a must.
Regards,
Angelo