thermal: rockchip: add rk3368 support
authorRocky Hao <rocky.hao@rock-chips.com>
Fri, 17 Mar 2017 01:50:30 +0000 (09:50 +0800)
committerRocky Hao <rocky.hao@rock-chips.com>
Tue, 21 Mar 2017 03:54:40 +0000 (11:54 +0800)
Change-Id: I970fedca9542c724d777c0bac788300c4fa21303
Signed-off-by: Rocky Hao <rocky.hao@rock-chips.com>
drivers/thermal/Kconfig
drivers/thermal/Makefile
drivers/thermal/rk3368_thermal.c [new file with mode: 0644]

index 8cc4ac6..580104b 100644 (file)
@@ -212,6 +212,15 @@ config ROCKCHIP_THERMAL
          trip point. Cpufreq is used as the cooling device and will throttle
          CPUs when the Temperature crosses the passive trip point.
 
+config RK3368_THERMAL
+       tristate "rk3368 thermal driver legacy"
+       depends on ROCKCHIP_THERMAL
+       help
+         Rk3368 thermal legacy driver provides support for Temperature sensor
+         ADC (TS-ADC) for rk3368 soc only. It supports one critical
+         trip point. Cpufreq is used as the cooling device and will throttle
+         CPUs when the Temperature crosses the passive trip point.
+
 config RCAR_THERMAL
        tristate "Renesas R-Car thermal driver"
        depends on ARCH_SHMOBILE || COMPILE_TEST
index cfae6a6..73eef83 100644 (file)
@@ -29,6 +29,7 @@ thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o
 obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM)     += qcom-spmi-temp-alarm.o
 obj-$(CONFIG_SPEAR_THERMAL)    += spear_thermal.o
 obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o
+obj-$(CONFIG_RK3368_THERMAL)   += rk3368_thermal.o
 obj-$(CONFIG_RCAR_THERMAL)     += rcar_thermal.o
 obj-$(CONFIG_KIRKWOOD_THERMAL)  += kirkwood_thermal.o
 obj-y                          += samsung/
diff --git a/drivers/thermal/rk3368_thermal.c b/drivers/thermal/rk3368_thermal.c
new file mode 100644 (file)
index 0000000..ec7161d
--- /dev/null
@@ -0,0 +1,1093 @@
+/*
+ * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/thermal.h>
+#include <linux/timer.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/rockchip/common.h>
+#include <linux/reboot.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/nvmem-consumer.h>
+
+/**
+ * If the temperature over a period of time High,
+ * the resulting TSHUT gave CRU module,let it reset the entire chip,
+ * or via GPIO give PMIC.
+ */
+enum tshut_mode {
+       TSHUT_MODE_CRU = 0,
+       TSHUT_MODE_GPIO,
+};
+
+enum tsadc_mode {
+       TSADC_AUTO_MODE = 0,
+       TSHUT_USER_MODE,
+};
+
+/**
+ * the system Temperature Sensors tshut(tshut) polarity
+ * the bit 8 is tshut polarity.
+ * 0: low active, 1: high active
+ */
+enum tshut_polarity {
+       TSHUT_LOW_ACTIVE = 0,
+       TSHUT_HIGH_ACTIVE,
+};
+
+#define NUM_SENSORS    2
+
+/* TSADC V2 Sensor info define: */
+#define TSADCV2_USER_CON                       0x00
+#define TSADCV2_AUTO_CON                       0x04
+#define TSADCV2_INT_EN                         0x08
+#define TSADCV2_INT_PD                         0x0c
+#define TSADCV2_DATA(chn)                      (0x20 + (chn) * 0x04)
+
+#define TSADC_CLK_CYCLE_TIME        32 /* usec */
+#define TSADCV3_DATA_MASK                      0x3ff
+
+/**
+ * The conversion table has the adc value and temperature.
+ * ADC_DECREMENT: the adc value is of diminishing.(e.g. rk3288_code_table)
+ * ADC_INCREMENT: the adc value is incremental.(e.g. rk3368_code_table)
+ */
+enum adc_sort_mode {
+       ADC_DECREMENT = 0,
+       ADC_INCREMENT,
+};
+
+#define TIME_OUT_TOTAL 2000
+#define INVALID_EFUSE_VALUE           0xff
+
+enum {
+       ACCESS_FORBIDDEN = 0,
+};
+
+#define MIN_TEMP (-40000)
+#define MAX_TEMP (125000)
+
+#define BASE (1024)
+#define BASE_SHIFT (10)
+#define START_BOUNDING_COUNT (100)
+#define HIGHER_BOUNDING_TEMP (30)
+#define LOWER_BOUNDING_TEMP (15)
+
+/**
+ * struct tsadc_table - hold information about code and temp mapping
+ * @code: raw code from tsadc ip
+ * @temp: the mapping temperature
+ */
+
+struct tsadc_table {
+       unsigned long code;
+       int temp;
+};
+
+/**
+ * struct chip_tsadc_table - hold information about chip-specific differences
+ * @id: conversion table
+ * @length: size of conversion table
+ * @data_mask: mask to apply on data inputs
+ * @mode: sort mode of this adc variant (incrementing or decrementing)
+ */
+struct chip_tsadc_table {
+       const struct tsadc_table *id;
+       unsigned int length;
+       u32 data_mask;
+       enum adc_sort_mode mode;
+};
+
+/**
+ * struct rk3368_tsadc_chip - hold the private data of tsadc chip
+ * @chn_id[SOC_MAX_SENSORS]: the sensor id of chip correspond to the channel
+ * @chn_num: the channel number of tsadc chip
+ * @tshut_temp: the hardware-controlled shutdown temperature value
+ * @tshut_mode: the hardware-controlled shutdown mode (0:CRU 1:GPIO)
+ * @tshut_polarity: the hardware-controlled active polarity (0:LOW 1:HIGH)
+ * @chip_tsadc_table: the chip-specific conversion table
+ * @get_temp: get the temperature
+ * @set_alarm_temp: set the high temperature interrupt
+ * @set_tshut_temp: set the hardware-controlled shutdown temperature
+ * @set_tshut_mode: set the hardware-controlled shutdown mode
+ */
+struct rk3368_tsadc_chip {
+       int chn_id[NUM_SENSORS];
+       int chn_num;
+       long hw_shut_temp;
+       enum tshut_mode tshut_mode;
+       enum tsadc_mode mode;
+       enum tshut_polarity tshut_polarity;
+
+       const struct chip_tsadc_table *temp_table;
+
+       /* Per-sensor methods */
+       int (*get_temp)(const struct chip_tsadc_table *table,
+                       int chn, void __iomem *reg, int *temp);
+       void (*set_alarm_temp)(const struct chip_tsadc_table *table,
+                              int chn, void __iomem *reg, int temp);
+       void (*set_tshut_temp)(const struct chip_tsadc_table *table,
+                              int chn, void __iomem *reg, int temp);
+       void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
+};
+
+/**
+ * struct rk3368_thermal_sensor - hold the information of thermal sensor
+ * @ctx:  pointer to the platform/configuration data
+ * @tzd: pointer to a thermal zone
+ * @id: identifier of the thermal sensor
+ */
+struct rk3368_thermal_sensor {
+       struct rk3368_thermal_data *ctx;
+       struct thermal_zone_device *tzd;
+       int id;
+};
+
+/**
+ * struct rk3368_thermal_data - hold the private data of thermal driver
+ * @chip: pointer to the platform/configuration data
+ * @pdev: platform device of thermal
+ * @reset: the reset controller of tsadc
+ * @sensors[SOC_MAX_SENSORS]: the thermal sensor
+ * @clk: the controller clock is divided by the external 24MHz
+ * @pclk: the advanced peripherals bus clock
+ * @regs: the base address of tsadc controller
+ * @tshut_temp: the hardware-controlled shutdown temperature value
+ * @tshut_mode: the hardware-controlled shutdown mode (0:CRU 1:GPIO)
+ * @tshut_polarity: the hardware-controlled active polarity (0:LOW 1:HIGH)
+ * @cpu_temp_adjust: efuse value used to ajust the temperature
+ * @gpu_temp_adjust: efuse value used to ajust the temperature
+ * @cpu_temp: the current cpu's temperature
+ * @logout: switch to control log output or not
+ * @rk3368_thermal_kobj: node in sys fs
+ */
+struct rk3368_thermal_data {
+       const struct rk3368_tsadc_chip *chip;
+       struct platform_device *pdev;
+       struct reset_control *reset;
+
+       struct rk3368_thermal_sensor sensors[NUM_SENSORS];
+
+       struct clk *clk;
+       struct clk *pclk;
+       void __iomem *regs;
+
+       long hw_shut_temp;
+       enum tshut_mode tshut_mode;
+       enum tshut_polarity tshut_polarity;
+
+       int cpu_temp_adjust;
+       int gpu_temp_adjust;
+       int cpu_temp;
+       bool logout;
+       struct kobject *rk3368_thermal_kobj;
+       struct regulator *ref_regulator;
+       int regulator_uv;
+       struct notifier_block tsadc_nb;
+};
+
+static struct rk3368_thermal_data *thermal_ctx;
+
+static DEFINE_MUTEX(thermal_reg_mutex);
+
+static const struct tsadc_table code_table_3368[] = {
+       {0, MIN_TEMP},
+       {106, MIN_TEMP},
+       {108, -35000},
+       {110, -30000},
+       {112, -25000},
+       {114, -20000},
+       {116, -15000},
+       {118, -10000},
+       {120, -5000},
+       {122, 0},
+       {124, 5000},
+       {126, 10000},
+       {128, 15000},
+       {130, 20000},
+       {132, 25000},
+       {134, 30000},
+       {136, 35000},
+       {138, 40000},
+       {140, 45000},
+       {142, 50000},
+       {144, 55000},
+       {146, 60000},
+       {148, 65000},
+       {150, 70000},
+       {152, 75000},
+       {154, 80000},
+       {156, 85000},
+       {158, 90000},
+       {160, 95000},
+       {162, 100000},
+       {163, 105000},
+       {165, 110000},
+       {167, 115000},
+       {169, 120000},
+       {171, MAX_TEMP},
+       {TSADCV3_DATA_MASK, MAX_TEMP},
+};
+
+static const struct chip_tsadc_table tsadc_table_3368 = {
+       .id = code_table_3368,
+       .length = ARRAY_SIZE(code_table_3368),
+       .data_mask = TSADCV3_DATA_MASK,
+       .mode = ADC_INCREMENT,
+};
+
+static int rk3368_get_ajust_code(struct device_node *np, u8 *ajust_code)
+{
+       struct nvmem_cell *cell;
+       unsigned char *buf;
+       size_t len;
+
+       cell = of_nvmem_cell_get(np, "temp_adjust");
+       if (IS_ERR(cell)) {
+               pr_err("avs failed to get temp_adjust cell\n");
+               return PTR_ERR(cell);
+       }
+
+       buf = (unsigned char *)nvmem_cell_read(cell, &len);
+
+       nvmem_cell_put(cell);
+
+       if (IS_ERR(buf))
+               return PTR_ERR(buf);
+
+       if (buf[0] == INVALID_EFUSE_VALUE)
+               return -EINVAL;
+
+       *ajust_code = buf[0];
+       kfree(buf);
+
+       return 0;
+}
+
+static struct rk3368_thermal_data *rk3368_thermal_get_data(void)
+{
+       WARN_ON(!thermal_ctx);
+       return thermal_ctx;
+}
+
+static int rk3368_temp_to_code(const struct chip_tsadc_table *tmp_table,
+                                long temp, u32 *code)
+{
+       unsigned int low = 1;
+       unsigned int high = tmp_table->length - 1;
+       unsigned int mid = (low + high) / 2;
+       unsigned int num;
+       unsigned long denom;
+       *code = tmp_table->data_mask;
+
+       WARN_ON(tmp_table->length < 2);
+
+       if (temp < tmp_table->id[low].temp)
+               return -EAGAIN; /* Incorrect reading */
+
+       while (low <= high) {
+               if (temp == tmp_table->id[mid].temp) {
+                       *code = tmp_table->id[mid].code;
+                       break;
+               } else if (temp > tmp_table->id[mid].temp) {
+                       low = mid + 1;
+               } else {
+                       high = mid - 1;
+               }
+
+               mid = (low + high) / 2;
+       }
+       /*
+        * The 5C granularity provided by the table is too much. Let's
+        * assume that the relationship between sensor readings and
+        * temperature between 2 table entries is linear and interpolate
+        * to produce less granular result.
+        */
+       if (*code == tmp_table->data_mask) {
+               num = abs(tmp_table->id[low].code - tmp_table->id[high].code);
+               num *= abs(tmp_table->id[high].temp - temp);
+               denom = abs(tmp_table->id[high].temp - tmp_table->id[low].temp);
+               *code = tmp_table->id[high].code + (num / denom);
+       }
+
+       return 0;
+}
+
+static int rk3368_code_to_temp(const struct chip_tsadc_table *tmp_table,
+                                u32 code, int *temp)
+{
+       unsigned int low = 1;
+       unsigned int high = tmp_table->length - 1;
+       unsigned int mid = (low + high) / 2;
+       unsigned int num;
+       unsigned long denom;
+       *temp = INVALID_TEMP;
+
+       WARN_ON(tmp_table->length < 2);
+
+       switch (tmp_table->mode) {
+       case ADC_DECREMENT:
+               code &= tmp_table->data_mask;
+               if (code < tmp_table->id[high].code)
+                       return -EAGAIN; /* Incorrect reading */
+
+               while (low <= high) {
+                       if (code == tmp_table->id[mid].code) {
+                               *temp = tmp_table->id[mid].temp;
+                               break;
+                       } else if (code < tmp_table->id[mid].code) {
+                               low = mid + 1;
+                       } else {
+                               high = mid - 1;
+                       }
+
+                       mid = (low + high) / 2;
+               }
+               break;
+       case ADC_INCREMENT:
+               code &= tmp_table->data_mask;
+               if (code < tmp_table->id[low].code)
+                       return -EAGAIN; /* Incorrect reading */
+
+               while (low <= high) {
+                       if (code == tmp_table->id[mid].code) {
+                               *temp = tmp_table->id[mid].temp;
+                               break;
+                       } else if (code > tmp_table->id[mid].code) {
+                               low = mid + 1;
+                       } else {
+                               high = mid - 1;
+                       }
+
+                       mid = (low + high) / 2;
+               }
+               break;
+       default:
+               pr_err("Invalid the conversion table\n");
+       }
+
+       /*
+        * The 5C granularity provided by the table is too much. Let's
+        * assume that the relationship between sensor readings and
+        * temperature between 2 table entries is linear and interpolate
+        * to produce less granular result.
+        */
+       if (*temp == INVALID_TEMP) {
+               num = abs(tmp_table->id[low].temp - tmp_table->id[high].temp);
+               num *= abs(tmp_table->id[high].code - code);
+               denom = abs(tmp_table->id[high].code - tmp_table->id[low].code);
+               *temp = tmp_table->id[high].temp + (num / denom);
+       }
+
+       return 0;
+}
+
+static const struct rk3368_tsadc_chip rk3368_tsadc_data = {
+       .tshut_mode = TSHUT_MODE_GPIO,  /* default TSHUT via GPIO give PMIC */
+       .tshut_polarity = TSHUT_LOW_ACTIVE,     /* default TSHUT LOW ACTIVE */
+       .hw_shut_temp = 125000,
+       .mode = TSHUT_USER_MODE,
+       .chn_num = 2,
+       .chn_id[0] = 0,
+       .chn_id[1] = 1,
+       .temp_table = &tsadc_table_3368,
+};
+
+static int rk3368_configure_from_dt(struct device *dev,
+                                     struct device_node *np,
+                                     struct rk3368_thermal_data *thermal)
+{
+       u32 shut_temp;
+       u32 rate;
+       int ret;
+
+       if (of_property_read_u32(np, "clock-frequency", &rate)) {
+               dev_err(dev, "Missing clock-frequency property in the DT.\n");
+               return -EINVAL;
+       }
+       ret = clk_set_rate(thermal->clk, rate);
+
+       if (of_property_read_u32(np, "hw-shut-temp", &shut_temp)) {
+               dev_warn(dev,
+                        "Missing tshut temp property, using default %ld\n",
+                        thermal->chip->hw_shut_temp);
+               thermal->hw_shut_temp = thermal->chip->hw_shut_temp;
+       } else {
+               thermal->hw_shut_temp = shut_temp;
+       }
+
+       if (thermal->hw_shut_temp > INT_MAX) {
+               dev_err(dev, "Invalid tshut temperature specified: %ld\n",
+                       thermal->hw_shut_temp);
+               return -ERANGE;
+       }
+
+       return 0;
+}
+
+static int predict_temp(int temp)
+{
+       int cov_q = 18;
+       int cov_r = 542;
+
+       int gain;
+       int temp_mid;
+       int temp_now;
+       int prob_mid;
+       int prob_now;
+       static int temp_last = 25;
+       static int prob_last = 20;
+       static int bounding_cnt;
+
+       struct rk3368_thermal_data *ctx = rk3368_thermal_get_data();
+
+       if (!ctx)
+               return INVALID_TEMP;
+
+       if (bounding_cnt++ > START_BOUNDING_COUNT) {
+               bounding_cnt = START_BOUNDING_COUNT;
+               if (temp - temp_last > HIGHER_BOUNDING_TEMP)
+                       temp = temp_last + HIGHER_BOUNDING_TEMP / 3;
+               if (temp_last - temp > LOWER_BOUNDING_TEMP)
+                       temp = temp_last - LOWER_BOUNDING_TEMP / 3;
+       }
+
+       temp_mid = temp_last;
+       prob_mid = prob_last + cov_q;
+       gain = (prob_mid * BASE) / (prob_mid + cov_r);
+
+       temp_now = temp_mid + (gain * (temp - temp_mid) >> BASE_SHIFT);
+       prob_now = ((BASE - gain) * prob_mid) >> BASE_SHIFT;
+
+       prob_last = prob_now;
+       temp_last = temp_now;
+
+       if (ctx->logout)
+               pr_info("prob_now %d, temp_last %d, temp %d gain %d", prob_now,
+                       temp_now, temp, gain);
+
+       return temp_last;
+}
+
+static int get_raw_code_internal(void)
+{
+       u32 val_cpu_pd;
+       int val_cpu;
+       int i;
+       struct rk3368_thermal_data *ctx = rk3368_thermal_get_data();
+
+       if (!ctx)
+               return INVALID_TEMP;
+
+       /* power up, channel 0 */
+       writel_relaxed(0x18, ctx->regs + TSADCV2_USER_CON);
+
+       udelay(TSADC_CLK_CYCLE_TIME * 2);
+       /* start working */
+       writel_relaxed(0x38, ctx->regs + TSADCV2_USER_CON);
+       udelay(TSADC_CLK_CYCLE_TIME * 13);
+
+       /* try 50 times */
+       for (i = 0; i < 50; i++) {
+               udelay(TSADC_CLK_CYCLE_TIME);
+               val_cpu_pd = readl_relaxed(ctx->regs + TSADCV2_INT_PD);
+
+               if ((val_cpu_pd & 0x100) == 0x100) {
+                       udelay(1);
+                       /*clear eoc inter */
+                       writel_relaxed(0x100, ctx->regs + TSADCV2_INT_PD);
+                       /*read adc data */
+                       val_cpu = readl_relaxed(ctx->regs + TSADCV2_DATA(0));
+                       break;
+               }
+       }
+       /*power down, channel 0 */
+       writel_relaxed(0x0, ctx->regs + TSADCV2_USER_CON);
+
+       return val_cpu;
+}
+
+#define RAW_CODE_MIN (50)
+#define RAW_CODE_MAX (225)
+
+static int rk3368_get_raw_code(void)
+{
+       static int old_data = 130;
+       int tsadc_data = 0;
+
+       tsadc_data = get_raw_code_internal();
+
+       if ((tsadc_data < RAW_CODE_MIN) || (tsadc_data > RAW_CODE_MAX))
+               tsadc_data = old_data;
+       else
+               old_data = tsadc_data;
+
+       return tsadc_data;
+}
+
+static int rk3368_convert_code_2_temp(int tsadc_data, int voltage)
+{
+       struct rk3368_thermal_data *ctx = rk3368_thermal_get_data();
+       const struct rk3368_tsadc_chip *tsadc;
+       int out_temp;
+       static int old_temp;
+       int data_adjust;
+
+       u32 code_temp;
+       u32 tmp_code1;
+       u32 tmp_code2;
+
+       if (!ctx)
+               return INVALID_TEMP;
+
+       tsadc = ctx->chip;
+
+       rk3368_temp_to_code(tsadc->temp_table,
+                             ctx->cpu_temp_adjust * 1000, &tmp_code1);
+       rk3368_temp_to_code(tsadc->temp_table, 0, &tmp_code2);
+       data_adjust = tmp_code1 - tmp_code2;
+       code_temp =
+           ((tsadc_data * voltage - data_adjust * 1000000) + 500000) / 1000000;
+       rk3368_code_to_temp(tsadc->temp_table, code_temp, &out_temp);
+
+       if (ctx->logout)
+               pr_info("cpu code temp:[%d, %d], voltage: %d\n",
+                       tsadc_data, out_temp / 1000, voltage);
+
+       if ((out_temp < MIN_TEMP) || (out_temp > MAX_TEMP))
+               out_temp = old_temp;
+       else
+               old_temp = out_temp;
+
+       ctx->cpu_temp = out_temp / 1000;
+       return out_temp;
+}
+
+static int rk3368_thermal_set_trips(void *_sensor, int low, int high)
+{
+       return 0;
+}
+
+static int rk3368_thermal_get_temp(void *_sensor, int *out_temp)
+{
+       int raw_code;
+       int temp;
+       struct rk3368_thermal_data *ctx = rk3368_thermal_get_data();
+       struct platform_device *pdev;
+
+       if (!ctx)
+               return INVALID_TEMP;
+
+       pdev = ctx->pdev;
+
+       mutex_lock(&thermal_reg_mutex);
+       raw_code = rk3368_get_raw_code();
+       temp = rk3368_convert_code_2_temp(raw_code, ctx->regulator_uv);
+       *out_temp = predict_temp(temp / 1000) * 1000;
+       mutex_unlock(&thermal_reg_mutex);
+
+       return 0;
+}
+
+static const struct thermal_zone_of_device_ops rk3368_of_thermal_ops = {
+       .get_temp = rk3368_thermal_get_temp,
+       .set_trips = rk3368_thermal_set_trips,
+};
+
+static int
+rk3368_thermal_register_sensor(struct platform_device *pdev,
+                                struct rk3368_thermal_data *ctx,
+                                struct rk3368_thermal_sensor *sensor, int id)
+{
+       int error;
+
+       sensor->ctx = ctx;
+       sensor->id = id;
+       sensor->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, id,
+                                                          sensor,
+                                                          &rk3368_of_thermal_ops);
+       if (IS_ERR(sensor->tzd)) {
+               error = PTR_ERR(sensor->tzd);
+               dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
+                       id, error);
+               return error;
+       }
+
+       return 0;
+}
+
+/*
+ * Reset TSADC Controller, reset all tsadc registers.
+ */
+static void rk3368_thermal_reset_controller(struct reset_control *reset)
+{
+       reset_control_assert(reset);
+       udelay(10);
+       reset_control_deassert(reset);
+}
+
+static ssize_t rk3368_thermal_temp_adjust_test_store(struct kobject *kobj,
+                                                      struct kobj_attribute
+                                                      *attr, const char *buf,
+                                                      size_t n)
+{
+       struct rk3368_thermal_data *ctx = rk3368_thermal_get_data();
+       int getdata;
+       char cmd;
+       const char *buftmp = buf;
+       int ret;
+
+       if (!ctx)
+               return n;
+
+       ret = sscanf(buftmp, "%c ", &cmd);
+       if (ret != 1)
+               return -EINVAL;
+
+       switch (cmd) {
+       case 'c':
+               ret = sscanf(buftmp, "%c %d", &cmd, &getdata);
+               if (ret != 2)
+                       return -EINVAL;
+               ctx->cpu_temp_adjust = getdata;
+               pr_info("get cpu_temp_adjust value = %d\n", getdata);
+
+               break;
+       case 'g':
+               ret = sscanf(buftmp, "%c %d", &cmd, &getdata);
+               if (ret != 2)
+                       return -EINVAL;
+               ctx->gpu_temp_adjust = getdata;
+               pr_info("get gpu_temp_adjust value = %d\n", getdata);
+
+               break;
+       default:
+               pr_info("Unknown command\n");
+               break;
+       }
+
+       return n;
+}
+
+static ssize_t rk3368_thermal_temp_adjust_test_show(struct kobject *kobj,
+                                                     struct kobj_attribute
+                                                     *attr, char *buf)
+{
+       struct rk3368_thermal_data *ctx = rk3368_thermal_get_data();
+       char *str = buf;
+
+       if (!ctx)
+               return 0;
+
+       str +=
+           sprintf(str, "rk3368_thermal: cpu:%d, gpu:%d\n",
+                   ctx->cpu_temp_adjust, ctx->gpu_temp_adjust);
+       return (str - buf);
+}
+
+static ssize_t rk3368_thermal_temp_test_store(struct kobject *kobj,
+                                               struct kobj_attribute *attr,
+                                               const char *buf, size_t n)
+{
+       struct rk3368_thermal_data *ctx = rk3368_thermal_get_data();
+       char cmd;
+       const char *buftmp = buf;
+       int ret;
+
+       if (!ctx)
+               return n;
+
+       ret = sscanf(buftmp, "%c", &cmd);
+       if (ret != 1)
+               return -EINVAL;
+
+       switch (cmd) {
+       case 't':
+               ctx->logout = true;
+               break;
+       case 'f':
+               ctx->logout = false;
+               break;
+       default:
+               pr_info("Unknown command\n");
+               break;
+       }
+
+       return n;
+}
+
+static ssize_t rk3368_thermal_temp_test_show(struct kobject *kobj,
+                                              struct kobj_attribute *attr,
+                                              char *buf)
+{
+       struct rk3368_thermal_data *ctx = rk3368_thermal_get_data();
+       char *str = buf;
+
+       if (!ctx)
+               return 0;
+
+       str += sprintf(str, "current cpu_temp:%d\n", ctx->cpu_temp);
+       return (str - buf);
+}
+
+struct rk3368_thermal_attribute {
+       struct attribute attr;
+       ssize_t (*show) (struct kobject *kobj, struct kobj_attribute *attr,
+                        char *buf);
+       ssize_t (*store) (struct kobject *kobj, struct kobj_attribute *attr,
+                         const char *buf, size_t n);
+};
+
+static struct rk3368_thermal_attribute rk3368_thermal_attrs[] = {
+       /*node_name permission show_func store_func */
+       __ATTR(temp_adjust, 0644,
+              rk3368_thermal_temp_adjust_test_show,
+              rk3368_thermal_temp_adjust_test_store),
+       __ATTR(temp, 0644, rk3368_thermal_temp_test_show,
+              rk3368_thermal_temp_test_store),
+};
+
+static void rk3368_dump_temperature(void)
+{
+       struct rk3368_thermal_data *ctx = rk3368_thermal_get_data();
+       struct platform_device *pdev;
+
+       if (!ctx)
+               return;
+
+       pdev = ctx->pdev;
+
+       if (ctx->cpu_temp != INVALID_TEMP)
+               dev_warn(&pdev->dev, "cpu channal temperature(%d C)\n",
+                        ctx->cpu_temp);
+
+       if (ctx->regs) {
+               pr_warn("THERMAL REGS:\n");
+               print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET,
+                              32, 4, ctx->regs, 0x88, false);
+       }
+}
+EXPORT_SYMBOL_GPL(rk3368_dump_temperature);
+
+static int rk3368_thermal_panic(struct notifier_block *this,
+                                 unsigned long ev, void *ptr)
+{
+       rk3368_dump_temperature();
+       return NOTIFY_DONE;
+}
+
+static struct notifier_block rk3368_thermal_panic_block = {
+       .notifier_call = rk3368_thermal_panic,
+};
+
+static int rk3368_thermal_notify(struct notifier_block *nb,
+                                  unsigned long event, void *data)
+{
+       struct rk3368_thermal_data *ctx = rk3368_thermal_get_data();
+       struct platform_device *pdev;
+
+       if (!ctx)
+               return NOTIFY_OK;
+
+       pdev = ctx->pdev;
+
+       if (event & REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) {
+               mutex_lock(&thermal_reg_mutex);
+       } else if (event & (REGULATOR_EVENT_VOLTAGE_CHANGE |
+                           REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE)) {
+               ctx->regulator_uv = (unsigned long)data;
+               mutex_unlock(&thermal_reg_mutex);
+       } else {
+               return NOTIFY_OK;
+       }
+       return NOTIFY_OK;
+}
+
+static const struct of_device_id of_rk3368_thermal_match[] = {
+       {
+        .compatible = "rockchip,rk3368-tsadc-legacy",
+        .data = (void *)&rk3368_tsadc_data,
+        },
+
+       { /* end */ },
+};
+MODULE_DEVICE_TABLE(of, of_rk3368_thermal_match);
+
+static int rk3368_thermal_probe(struct platform_device *pdev)
+{
+       struct device_node *np = pdev->dev.of_node;
+       struct rk3368_thermal_data *ctx;
+       const struct of_device_id *match;
+       struct resource *res;
+       int irq;
+       int i, j;
+       int error;
+       int uv;
+       u8 ajust_code = 0;
+
+       match = of_match_node(of_rk3368_thermal_match, np);
+       if (!match)
+               return -ENXIO;
+
+       irq = platform_get_irq(pdev, 0);
+       if (irq < 0) {
+               dev_err(&pdev->dev, "no irq resource?\n");
+               return -EINVAL;
+       }
+
+       ctx = devm_kzalloc(&pdev->dev, sizeof(struct rk3368_thermal_data),
+                          GFP_KERNEL);
+       if (!ctx)
+               return -ENOMEM;
+
+       ctx->pdev = pdev;
+
+       ctx->chip = (const struct rk3368_tsadc_chip *)match->data;
+       if (!ctx->chip)
+               return -EINVAL;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       ctx->regs = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(ctx->regs))
+               return PTR_ERR(ctx->regs);
+
+       ctx->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");
+       if (IS_ERR(ctx->reset)) {
+               error = PTR_ERR(ctx->reset);
+               dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);
+               return error;
+       }
+
+       ctx->clk = devm_clk_get(&pdev->dev, "tsadc");
+       if (IS_ERR(ctx->clk)) {
+               error = PTR_ERR(ctx->clk);
+               dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
+               return error;
+       }
+
+       ctx->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
+       if (IS_ERR(ctx->pclk)) {
+               error = PTR_ERR(ctx->pclk);
+               dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
+                       error);
+               return error;
+       }
+
+       error = clk_prepare_enable(ctx->clk);
+       if (error) {
+               dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
+                       error);
+               return error;
+       }
+
+       error = clk_prepare_enable(ctx->pclk);
+       if (error) {
+               dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
+               goto err_disable_clk;
+       }
+
+       rk3368_thermal_reset_controller(ctx->reset);
+
+       error = rk3368_configure_from_dt(&pdev->dev, np, ctx);
+       if (error) {
+               dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
+                       error);
+               goto err_disable_pclk;
+       }
+
+       thermal_ctx = ctx;
+       ctx->ref_regulator = devm_regulator_get_optional(&pdev->dev, "tsadc");
+
+       if (IS_ERR(ctx->ref_regulator)) {
+               error = PTR_ERR(ctx->ref_regulator);
+
+               if (error != -EPROBE_DEFER)
+                       dev_err(&pdev->dev,
+                               "couldn't get regulator tsadc-supply\n");
+               goto err_disable_pclk;
+       }
+
+       ctx->tsadc_nb.notifier_call = rk3368_thermal_notify;
+
+       /* register regulator notifier */
+       error =
+           regulator_register_notifier(ctx->ref_regulator, &ctx->tsadc_nb);
+       if (error) {
+               dev_err(&pdev->dev, "regulator notifier request failed\n");
+               goto err_disable_pclk;
+       }
+
+       uv = regulator_get_voltage(ctx->ref_regulator);
+       if (uv <= 0) {
+               dev_WARN(&pdev->dev, "regulator get failed\n");
+               uv = 1000000;
+       }
+
+       mutex_lock(&thermal_reg_mutex);
+       if (!ctx->regulator_uv)
+               ctx->regulator_uv = uv;
+       mutex_unlock(&thermal_reg_mutex);
+
+       rk3368_get_ajust_code(np, &ajust_code);
+
+       ctx->cpu_temp_adjust = (int)ajust_code;
+
+       for (i = 0; i < ctx->chip->chn_num; i++) {
+               error = rk3368_thermal_register_sensor(pdev, ctx,
+                                                        &ctx->sensors[i],
+                                                        ctx->chip->chn_id[i]);
+               if (error) {
+                       dev_err(&pdev->dev,
+                               "failed to register thermal sensor %d : error= %d\n",
+                               i, error);
+                       for (j = 0; j < i; j++)
+                               thermal_zone_of_sensor_unregister(&pdev->dev,
+                                                                 ctx->sensors[j].tzd);
+                       goto err_unreg_notifier;
+               }
+       }
+
+       ctx->rk3368_thermal_kobj =
+           kobject_create_and_add("rk3368_thermal", NULL);
+       if (!ctx->rk3368_thermal_kobj) {
+               error = -ENOMEM;
+               dev_err(&pdev->dev,
+                       "failed to creat debug node : error= %d\n", error);
+               goto err_unreg_notifier;
+       }
+
+       for (i = 0; i < ARRAY_SIZE(rk3368_thermal_attrs); i++) {
+               error =
+                   sysfs_create_file(ctx->rk3368_thermal_kobj,
+                                     &rk3368_thermal_attrs[i].attr);
+               if (error) {
+                       dev_err(&pdev->dev,
+                               "failed to register thermal sensor %d : error= %d\n",
+                               i, error);
+                       for (j = 0; j < i; j++)
+                               sysfs_remove_file(ctx->rk3368_thermal_kobj,
+                                                 &rk3368_thermal_attrs[j].attr);
+
+                       goto err_unreg_notifier;
+               }
+       }
+
+       platform_set_drvdata(pdev, ctx);
+
+       atomic_notifier_chain_register(&panic_notifier_list,
+                                      &rk3368_thermal_panic_block);
+
+       ctx->cpu_temp = INVALID_TEMP;
+
+       pr_info("rk3368 tsadc probed successfully\n");
+
+       return 0;
+
+err_unreg_notifier:
+       regulator_unregister_notifier(ctx->ref_regulator, &ctx->tsadc_nb);
+
+err_disable_pclk:
+       clk_disable_unprepare(ctx->pclk);
+err_disable_clk:
+       clk_disable_unprepare(ctx->clk);
+
+       return error;
+}
+
+static int rk3368_thermal_remove(struct platform_device *pdev)
+{
+       struct rk3368_thermal_data *ctx = platform_get_drvdata(pdev);
+       int i;
+
+       for (i = 0; i < ctx->chip->chn_num; i++) {
+               struct rk3368_thermal_sensor *sensor = &ctx->sensors[i];
+
+               thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
+       }
+       clk_disable_unprepare(ctx->pclk);
+       clk_disable_unprepare(ctx->clk);
+
+       return 0;
+}
+
+static int __maybe_unused rk3368_thermal_suspend(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct rk3368_thermal_data *ctx = platform_get_drvdata(pdev);
+
+       clk_disable(ctx->pclk);
+       clk_disable(ctx->clk);
+       return 0;
+}
+
+static int __maybe_unused rk3368_thermal_resume(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct rk3368_thermal_data *ctx = platform_get_drvdata(pdev);
+       int error;
+
+       error = clk_enable(ctx->clk);
+       if (error)
+               return error;
+
+       error = clk_enable(ctx->pclk);
+       if (error) {
+               clk_disable(ctx->clk);
+               return error;
+       }
+
+       rk3368_thermal_reset_controller(ctx->reset);
+
+       return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(rk3368_thermal_pm_ops,
+                        rk3368_thermal_suspend, rk3368_thermal_resume);
+
+static struct platform_driver rk3368_thermal_driver = {
+       .driver = {
+               .name = "rk3368-thermal",
+               .pm = &rk3368_thermal_pm_ops,
+               .of_match_table = of_rk3368_thermal_match,
+       },
+       .probe = rk3368_thermal_probe,
+       .remove = rk3368_thermal_remove,
+};
+
+/* rk3368 thermal needs a clock source of 32k from rk818, so this init process
+ * is postponed
+ */
+static int __init rk3368_thermal_init_driver(void)
+{
+       return platform_driver_register(&rk3368_thermal_driver);
+}
+late_initcall(rk3368_thermal_init_driver);
+
+MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
+MODULE_AUTHOR("Rockchip, Inc.");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:rk3368-thermal");