--- /dev/null
+/*
+ * 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");
projects / firefly-linux-kernel-4.4.55.git / blobdiff