[v2,2/3] thermal: mediatek: Add LVTS drivers for SoC theraml zones
Michael Kao
michael.kao at mediatek.com
Fri Jan 29 04:30:09 EST 2021
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 at mediatek.com>
Signed-off-by: Michael Kao <michael.kao at mediatek.com>
---
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..b56c2cd3cb39
--- /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 = ((long long)((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 <ethan.chang at mediatek.com>");
+MODULE_AUTHOR("Michael Kao <michael.kao at mediatek.com>");
+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
More information about the linux-arm-kernel
mailing list