From: Rocky Hao Date: Fri, 17 Mar 2017 01:50:30 +0000 (+0800) Subject: thermal: rockchip: add rk3368 support X-Git-Tag: firefly_0821_release~279 X-Git-Url: http://plrg.eecs.uci.edu/git/?p=firefly-linux-kernel-4.4.55.git;a=commitdiff_plain;h=fa07761ac37e6003f0c9569924ca34af1de2a703 thermal: rockchip: add rk3368 support Change-Id: I970fedca9542c724d777c0bac788300c4fa21303 Signed-off-by: Rocky Hao --- diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 8cc4ac64a91c..580104b1063b 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -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 diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index cfae6a654793..73eef831c536 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -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 index 000000000000..ec7161dc8cab --- /dev/null +++ b/drivers/thermal/rk3368_thermal.c @@ -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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/** + * 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");