1ca3de46bSShawn Guo /* 2ca3de46bSShawn Guo * Copyright 2013 Freescale Semiconductor, Inc. 3ca3de46bSShawn Guo * 4ca3de46bSShawn Guo * This program is free software; you can redistribute it and/or modify 5ca3de46bSShawn Guo * it under the terms of the GNU General Public License version 2 as 6ca3de46bSShawn Guo * published by the Free Software Foundation. 7ca3de46bSShawn Guo * 8ca3de46bSShawn Guo */ 9ca3de46bSShawn Guo 10329fe7b1SAnson Huang #include <linux/clk.h> 114d753aa7SViresh Kumar #include <linux/cpufreq.h> 12ca3de46bSShawn Guo #include <linux/cpu_cooling.h> 13ca3de46bSShawn Guo #include <linux/delay.h> 14ca3de46bSShawn Guo #include <linux/device.h> 15ca3de46bSShawn Guo #include <linux/init.h> 1637713a1eSPhilipp Zabel #include <linux/interrupt.h> 17ca3de46bSShawn Guo #include <linux/io.h> 18ca3de46bSShawn Guo #include <linux/kernel.h> 19ca3de46bSShawn Guo #include <linux/mfd/syscon.h> 20ca3de46bSShawn Guo #include <linux/module.h> 21ca3de46bSShawn Guo #include <linux/of.h> 223c94f17eSAnson Huang #include <linux/of_device.h> 23ca3de46bSShawn Guo #include <linux/platform_device.h> 24ca3de46bSShawn Guo #include <linux/regmap.h> 25ca3de46bSShawn Guo #include <linux/slab.h> 26ca3de46bSShawn Guo #include <linux/thermal.h> 27ca3de46bSShawn Guo #include <linux/types.h> 28ae621557SLeonard Crestez #include <linux/nvmem-consumer.h> 29ca3de46bSShawn Guo 30ca3de46bSShawn Guo #define REG_SET 0x4 31ca3de46bSShawn Guo #define REG_CLR 0x8 32ca3de46bSShawn Guo #define REG_TOG 0xc 33ca3de46bSShawn Guo 34ca3de46bSShawn Guo #define MISC0 0x0150 35ca3de46bSShawn Guo #define MISC0_REFTOP_SELBIASOFF (1 << 3) 363c94f17eSAnson Huang #define MISC1 0x0160 373c94f17eSAnson Huang #define MISC1_IRQ_TEMPHIGH (1 << 29) 383c94f17eSAnson Huang /* Below LOW and PANIC bits are only for TEMPMON_IMX6SX */ 393c94f17eSAnson Huang #define MISC1_IRQ_TEMPLOW (1 << 28) 403c94f17eSAnson Huang #define MISC1_IRQ_TEMPPANIC (1 << 27) 41ca3de46bSShawn Guo 42ca3de46bSShawn Guo #define TEMPSENSE0 0x0180 4337713a1eSPhilipp Zabel #define TEMPSENSE0_ALARM_VALUE_SHIFT 20 4437713a1eSPhilipp Zabel #define TEMPSENSE0_ALARM_VALUE_MASK (0xfff << TEMPSENSE0_ALARM_VALUE_SHIFT) 45ca3de46bSShawn Guo #define TEMPSENSE0_TEMP_CNT_SHIFT 8 46ca3de46bSShawn Guo #define TEMPSENSE0_TEMP_CNT_MASK (0xfff << TEMPSENSE0_TEMP_CNT_SHIFT) 47ca3de46bSShawn Guo #define TEMPSENSE0_FINISHED (1 << 2) 48ca3de46bSShawn Guo #define TEMPSENSE0_MEASURE_TEMP (1 << 1) 49ca3de46bSShawn Guo #define TEMPSENSE0_POWER_DOWN (1 << 0) 50ca3de46bSShawn Guo 51ca3de46bSShawn Guo #define TEMPSENSE1 0x0190 52ca3de46bSShawn Guo #define TEMPSENSE1_MEASURE_FREQ 0xffff 533c94f17eSAnson Huang /* Below TEMPSENSE2 is only for TEMPMON_IMX6SX */ 543c94f17eSAnson Huang #define TEMPSENSE2 0x0290 553c94f17eSAnson Huang #define TEMPSENSE2_LOW_VALUE_SHIFT 0 563c94f17eSAnson Huang #define TEMPSENSE2_LOW_VALUE_MASK 0xfff 573c94f17eSAnson Huang #define TEMPSENSE2_PANIC_VALUE_SHIFT 16 583c94f17eSAnson Huang #define TEMPSENSE2_PANIC_VALUE_MASK 0xfff0000 59ca3de46bSShawn Guo 60a2291badSTim Harvey #define OCOTP_MEM0 0x0480 61ca3de46bSShawn Guo #define OCOTP_ANA1 0x04e0 62ca3de46bSShawn Guo 63ca3de46bSShawn Guo /* The driver supports 1 passive trip point and 1 critical trip point */ 64ca3de46bSShawn Guo enum imx_thermal_trip { 65ca3de46bSShawn Guo IMX_TRIP_PASSIVE, 66ca3de46bSShawn Guo IMX_TRIP_CRITICAL, 67ca3de46bSShawn Guo IMX_TRIP_NUM, 68ca3de46bSShawn Guo }; 69ca3de46bSShawn Guo 70ca3de46bSShawn Guo #define IMX_POLLING_DELAY 2000 /* millisecond */ 71ca3de46bSShawn Guo #define IMX_PASSIVE_DELAY 1000 72ca3de46bSShawn Guo 73749e8be7SAnson Huang #define FACTOR0 10000000 74749e8be7SAnson Huang #define FACTOR1 15976 75749e8be7SAnson Huang #define FACTOR2 4297157 76749e8be7SAnson Huang 773c94f17eSAnson Huang #define TEMPMON_IMX6Q 1 783c94f17eSAnson Huang #define TEMPMON_IMX6SX 2 793c94f17eSAnson Huang 803c94f17eSAnson Huang struct thermal_soc_data { 813c94f17eSAnson Huang u32 version; 823c94f17eSAnson Huang }; 833c94f17eSAnson Huang 843c94f17eSAnson Huang static struct thermal_soc_data thermal_imx6q_data = { 853c94f17eSAnson Huang .version = TEMPMON_IMX6Q, 863c94f17eSAnson Huang }; 873c94f17eSAnson Huang 883c94f17eSAnson Huang static struct thermal_soc_data thermal_imx6sx_data = { 893c94f17eSAnson Huang .version = TEMPMON_IMX6SX, 903c94f17eSAnson Huang }; 913c94f17eSAnson Huang 92ca3de46bSShawn Guo struct imx_thermal_data { 934d753aa7SViresh Kumar struct cpufreq_policy *policy; 94ca3de46bSShawn Guo struct thermal_zone_device *tz; 95ca3de46bSShawn Guo struct thermal_cooling_device *cdev; 96ca3de46bSShawn Guo enum thermal_device_mode mode; 97ca3de46bSShawn Guo struct regmap *tempmon; 98ae621557SLeonard Crestez u32 c1, c2; /* See formula in imx_init_calib() */ 9917e8351aSSascha Hauer int temp_passive; 10017e8351aSSascha Hauer int temp_critical; 101a2291badSTim Harvey int temp_max; 10217e8351aSSascha Hauer int alarm_temp; 10317e8351aSSascha Hauer int last_temp; 10437713a1eSPhilipp Zabel bool irq_enabled; 10537713a1eSPhilipp Zabel int irq; 106329fe7b1SAnson Huang struct clk *thermal_clk; 1073c94f17eSAnson Huang const struct thermal_soc_data *socdata; 108a2291badSTim Harvey const char *temp_grade; 109ca3de46bSShawn Guo }; 110ca3de46bSShawn Guo 1113c94f17eSAnson Huang static void imx_set_panic_temp(struct imx_thermal_data *data, 11217e8351aSSascha Hauer int panic_temp) 1133c94f17eSAnson Huang { 1143c94f17eSAnson Huang struct regmap *map = data->tempmon; 1153c94f17eSAnson Huang int critical_value; 1163c94f17eSAnson Huang 1173c94f17eSAnson Huang critical_value = (data->c2 - panic_temp) / data->c1; 1183c94f17eSAnson Huang regmap_write(map, TEMPSENSE2 + REG_CLR, TEMPSENSE2_PANIC_VALUE_MASK); 1193c94f17eSAnson Huang regmap_write(map, TEMPSENSE2 + REG_SET, critical_value << 1203c94f17eSAnson Huang TEMPSENSE2_PANIC_VALUE_SHIFT); 1213c94f17eSAnson Huang } 1223c94f17eSAnson Huang 12337713a1eSPhilipp Zabel static void imx_set_alarm_temp(struct imx_thermal_data *data, 12417e8351aSSascha Hauer int alarm_temp) 12537713a1eSPhilipp Zabel { 12637713a1eSPhilipp Zabel struct regmap *map = data->tempmon; 12737713a1eSPhilipp Zabel int alarm_value; 12837713a1eSPhilipp Zabel 12937713a1eSPhilipp Zabel data->alarm_temp = alarm_temp; 130749e8be7SAnson Huang alarm_value = (data->c2 - alarm_temp) / data->c1; 13137713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_ALARM_VALUE_MASK); 13237713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE0 + REG_SET, alarm_value << 13337713a1eSPhilipp Zabel TEMPSENSE0_ALARM_VALUE_SHIFT); 13437713a1eSPhilipp Zabel } 13537713a1eSPhilipp Zabel 13617e8351aSSascha Hauer static int imx_get_temp(struct thermal_zone_device *tz, int *temp) 137ca3de46bSShawn Guo { 138ca3de46bSShawn Guo struct imx_thermal_data *data = tz->devdata; 139ca3de46bSShawn Guo struct regmap *map = data->tempmon; 140ca3de46bSShawn Guo unsigned int n_meas; 14137713a1eSPhilipp Zabel bool wait; 142ca3de46bSShawn Guo u32 val; 143ca3de46bSShawn Guo 14437713a1eSPhilipp Zabel if (data->mode == THERMAL_DEVICE_ENABLED) { 14537713a1eSPhilipp Zabel /* Check if a measurement is currently in progress */ 14637713a1eSPhilipp Zabel regmap_read(map, TEMPSENSE0, &val); 14737713a1eSPhilipp Zabel wait = !(val & TEMPSENSE0_FINISHED); 14837713a1eSPhilipp Zabel } else { 149ca3de46bSShawn Guo /* 150ca3de46bSShawn Guo * Every time we measure the temperature, we will power on the 151ca3de46bSShawn Guo * temperature sensor, enable measurements, take a reading, 152ca3de46bSShawn Guo * disable measurements, power off the temperature sensor. 153ca3de46bSShawn Guo */ 154ca3de46bSShawn Guo regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); 155ca3de46bSShawn Guo regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); 156ca3de46bSShawn Guo 15737713a1eSPhilipp Zabel wait = true; 15837713a1eSPhilipp Zabel } 15937713a1eSPhilipp Zabel 160ca3de46bSShawn Guo /* 161ca3de46bSShawn Guo * According to the temp sensor designers, it may require up to ~17us 162ca3de46bSShawn Guo * to complete a measurement. 163ca3de46bSShawn Guo */ 16437713a1eSPhilipp Zabel if (wait) 165ca3de46bSShawn Guo usleep_range(20, 50); 166ca3de46bSShawn Guo 167ca3de46bSShawn Guo regmap_read(map, TEMPSENSE0, &val); 16837713a1eSPhilipp Zabel 16937713a1eSPhilipp Zabel if (data->mode != THERMAL_DEVICE_ENABLED) { 170ca3de46bSShawn Guo regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); 171ca3de46bSShawn Guo regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); 17237713a1eSPhilipp Zabel } 173ca3de46bSShawn Guo 174ca3de46bSShawn Guo if ((val & TEMPSENSE0_FINISHED) == 0) { 175ca3de46bSShawn Guo dev_dbg(&tz->device, "temp measurement never finished\n"); 176ca3de46bSShawn Guo return -EAGAIN; 177ca3de46bSShawn Guo } 178ca3de46bSShawn Guo 179ca3de46bSShawn Guo n_meas = (val & TEMPSENSE0_TEMP_CNT_MASK) >> TEMPSENSE0_TEMP_CNT_SHIFT; 180ca3de46bSShawn Guo 181ae621557SLeonard Crestez /* See imx_init_calib() for formula derivation */ 182749e8be7SAnson Huang *temp = data->c2 - n_meas * data->c1; 183ca3de46bSShawn Guo 1843c94f17eSAnson Huang /* Update alarm value to next higher trip point for TEMPMON_IMX6Q */ 1853c94f17eSAnson Huang if (data->socdata->version == TEMPMON_IMX6Q) { 1863c94f17eSAnson Huang if (data->alarm_temp == data->temp_passive && 1873c94f17eSAnson Huang *temp >= data->temp_passive) 18837713a1eSPhilipp Zabel imx_set_alarm_temp(data, data->temp_critical); 1893c94f17eSAnson Huang if (data->alarm_temp == data->temp_critical && 1903c94f17eSAnson Huang *temp < data->temp_passive) { 19137713a1eSPhilipp Zabel imx_set_alarm_temp(data, data->temp_passive); 19217e8351aSSascha Hauer dev_dbg(&tz->device, "thermal alarm off: T < %d\n", 19337713a1eSPhilipp Zabel data->alarm_temp / 1000); 19437713a1eSPhilipp Zabel } 1953c94f17eSAnson Huang } 19637713a1eSPhilipp Zabel 19737713a1eSPhilipp Zabel if (*temp != data->last_temp) { 19817e8351aSSascha Hauer dev_dbg(&tz->device, "millicelsius: %d\n", *temp); 19937713a1eSPhilipp Zabel data->last_temp = *temp; 20037713a1eSPhilipp Zabel } 20137713a1eSPhilipp Zabel 20237713a1eSPhilipp Zabel /* Reenable alarm IRQ if temperature below alarm temperature */ 20337713a1eSPhilipp Zabel if (!data->irq_enabled && *temp < data->alarm_temp) { 20437713a1eSPhilipp Zabel data->irq_enabled = true; 20537713a1eSPhilipp Zabel enable_irq(data->irq); 206ca3de46bSShawn Guo } 207ca3de46bSShawn Guo 208ca3de46bSShawn Guo return 0; 209ca3de46bSShawn Guo } 210ca3de46bSShawn Guo 211ca3de46bSShawn Guo static int imx_get_mode(struct thermal_zone_device *tz, 212ca3de46bSShawn Guo enum thermal_device_mode *mode) 213ca3de46bSShawn Guo { 214ca3de46bSShawn Guo struct imx_thermal_data *data = tz->devdata; 215ca3de46bSShawn Guo 216ca3de46bSShawn Guo *mode = data->mode; 217ca3de46bSShawn Guo 218ca3de46bSShawn Guo return 0; 219ca3de46bSShawn Guo } 220ca3de46bSShawn Guo 221ca3de46bSShawn Guo static int imx_set_mode(struct thermal_zone_device *tz, 222ca3de46bSShawn Guo enum thermal_device_mode mode) 223ca3de46bSShawn Guo { 224ca3de46bSShawn Guo struct imx_thermal_data *data = tz->devdata; 22537713a1eSPhilipp Zabel struct regmap *map = data->tempmon; 226ca3de46bSShawn Guo 227ca3de46bSShawn Guo if (mode == THERMAL_DEVICE_ENABLED) { 228ca3de46bSShawn Guo tz->polling_delay = IMX_POLLING_DELAY; 229ca3de46bSShawn Guo tz->passive_delay = IMX_PASSIVE_DELAY; 23037713a1eSPhilipp Zabel 23137713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); 23237713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); 23337713a1eSPhilipp Zabel 23437713a1eSPhilipp Zabel if (!data->irq_enabled) { 23537713a1eSPhilipp Zabel data->irq_enabled = true; 23637713a1eSPhilipp Zabel enable_irq(data->irq); 23737713a1eSPhilipp Zabel } 238ca3de46bSShawn Guo } else { 23937713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); 24037713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); 24137713a1eSPhilipp Zabel 242ca3de46bSShawn Guo tz->polling_delay = 0; 243ca3de46bSShawn Guo tz->passive_delay = 0; 24437713a1eSPhilipp Zabel 24537713a1eSPhilipp Zabel if (data->irq_enabled) { 24637713a1eSPhilipp Zabel disable_irq(data->irq); 24737713a1eSPhilipp Zabel data->irq_enabled = false; 24837713a1eSPhilipp Zabel } 249ca3de46bSShawn Guo } 250ca3de46bSShawn Guo 251ca3de46bSShawn Guo data->mode = mode; 2520e70f466SSrinivas Pandruvada thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); 253ca3de46bSShawn Guo 254ca3de46bSShawn Guo return 0; 255ca3de46bSShawn Guo } 256ca3de46bSShawn Guo 257ca3de46bSShawn Guo static int imx_get_trip_type(struct thermal_zone_device *tz, int trip, 258ca3de46bSShawn Guo enum thermal_trip_type *type) 259ca3de46bSShawn Guo { 260ca3de46bSShawn Guo *type = (trip == IMX_TRIP_PASSIVE) ? THERMAL_TRIP_PASSIVE : 261ca3de46bSShawn Guo THERMAL_TRIP_CRITICAL; 262ca3de46bSShawn Guo return 0; 263ca3de46bSShawn Guo } 264ca3de46bSShawn Guo 26517e8351aSSascha Hauer static int imx_get_crit_temp(struct thermal_zone_device *tz, int *temp) 266ca3de46bSShawn Guo { 267017e5142SPhilipp Zabel struct imx_thermal_data *data = tz->devdata; 268017e5142SPhilipp Zabel 269017e5142SPhilipp Zabel *temp = data->temp_critical; 270ca3de46bSShawn Guo return 0; 271ca3de46bSShawn Guo } 272ca3de46bSShawn Guo 273ca3de46bSShawn Guo static int imx_get_trip_temp(struct thermal_zone_device *tz, int trip, 27417e8351aSSascha Hauer int *temp) 275ca3de46bSShawn Guo { 276017e5142SPhilipp Zabel struct imx_thermal_data *data = tz->devdata; 277017e5142SPhilipp Zabel 278017e5142SPhilipp Zabel *temp = (trip == IMX_TRIP_PASSIVE) ? data->temp_passive : 279017e5142SPhilipp Zabel data->temp_critical; 280017e5142SPhilipp Zabel return 0; 281017e5142SPhilipp Zabel } 282017e5142SPhilipp Zabel 283017e5142SPhilipp Zabel static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip, 28417e8351aSSascha Hauer int temp) 285017e5142SPhilipp Zabel { 286017e5142SPhilipp Zabel struct imx_thermal_data *data = tz->devdata; 287017e5142SPhilipp Zabel 288a2291badSTim Harvey /* do not allow changing critical threshold */ 289017e5142SPhilipp Zabel if (trip == IMX_TRIP_CRITICAL) 290017e5142SPhilipp Zabel return -EPERM; 291017e5142SPhilipp Zabel 292a2291badSTim Harvey /* do not allow passive to be set higher than critical */ 293a2291badSTim Harvey if (temp < 0 || temp > data->temp_critical) 294017e5142SPhilipp Zabel return -EINVAL; 295017e5142SPhilipp Zabel 296017e5142SPhilipp Zabel data->temp_passive = temp; 297017e5142SPhilipp Zabel 29837713a1eSPhilipp Zabel imx_set_alarm_temp(data, temp); 29937713a1eSPhilipp Zabel 300ca3de46bSShawn Guo return 0; 301ca3de46bSShawn Guo } 302ca3de46bSShawn Guo 303ca3de46bSShawn Guo static int imx_bind(struct thermal_zone_device *tz, 304ca3de46bSShawn Guo struct thermal_cooling_device *cdev) 305ca3de46bSShawn Guo { 306ca3de46bSShawn Guo int ret; 307ca3de46bSShawn Guo 308ca3de46bSShawn Guo ret = thermal_zone_bind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev, 309ca3de46bSShawn Guo THERMAL_NO_LIMIT, 3106cd9e9f6SKapileshwar Singh THERMAL_NO_LIMIT, 3116cd9e9f6SKapileshwar Singh THERMAL_WEIGHT_DEFAULT); 312ca3de46bSShawn Guo if (ret) { 313ca3de46bSShawn Guo dev_err(&tz->device, 314ca3de46bSShawn Guo "binding zone %s with cdev %s failed:%d\n", 315ca3de46bSShawn Guo tz->type, cdev->type, ret); 316ca3de46bSShawn Guo return ret; 317ca3de46bSShawn Guo } 318ca3de46bSShawn Guo 319ca3de46bSShawn Guo return 0; 320ca3de46bSShawn Guo } 321ca3de46bSShawn Guo 322ca3de46bSShawn Guo static int imx_unbind(struct thermal_zone_device *tz, 323ca3de46bSShawn Guo struct thermal_cooling_device *cdev) 324ca3de46bSShawn Guo { 325ca3de46bSShawn Guo int ret; 326ca3de46bSShawn Guo 327ca3de46bSShawn Guo ret = thermal_zone_unbind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev); 328ca3de46bSShawn Guo if (ret) { 329ca3de46bSShawn Guo dev_err(&tz->device, 330ca3de46bSShawn Guo "unbinding zone %s with cdev %s failed:%d\n", 331ca3de46bSShawn Guo tz->type, cdev->type, ret); 332ca3de46bSShawn Guo return ret; 333ca3de46bSShawn Guo } 334ca3de46bSShawn Guo 335ca3de46bSShawn Guo return 0; 336ca3de46bSShawn Guo } 337ca3de46bSShawn Guo 338cbb07bb3SEduardo Valentin static struct thermal_zone_device_ops imx_tz_ops = { 339ca3de46bSShawn Guo .bind = imx_bind, 340ca3de46bSShawn Guo .unbind = imx_unbind, 341ca3de46bSShawn Guo .get_temp = imx_get_temp, 342ca3de46bSShawn Guo .get_mode = imx_get_mode, 343ca3de46bSShawn Guo .set_mode = imx_set_mode, 344ca3de46bSShawn Guo .get_trip_type = imx_get_trip_type, 345ca3de46bSShawn Guo .get_trip_temp = imx_get_trip_temp, 346ca3de46bSShawn Guo .get_crit_temp = imx_get_crit_temp, 347017e5142SPhilipp Zabel .set_trip_temp = imx_set_trip_temp, 348ca3de46bSShawn Guo }; 349ca3de46bSShawn Guo 350e4bb2240SUwe Kleine-König static int imx_init_calib(struct platform_device *pdev, u32 ocotp_ana1) 351ca3de46bSShawn Guo { 352ca3de46bSShawn Guo struct imx_thermal_data *data = platform_get_drvdata(pdev); 353d0f9d64aSAnson Huang int t1, n1; 354749e8be7SAnson Huang u64 temp64; 355ca3de46bSShawn Guo 356e4bb2240SUwe Kleine-König if (ocotp_ana1 == 0 || ocotp_ana1 == ~0) { 357ca3de46bSShawn Guo dev_err(&pdev->dev, "invalid sensor calibration data\n"); 358ca3de46bSShawn Guo return -EINVAL; 359ca3de46bSShawn Guo } 360ca3de46bSShawn Guo 361ca3de46bSShawn Guo /* 362ca3de46bSShawn Guo * Sensor data layout: 363ca3de46bSShawn Guo * [31:20] - sensor value @ 25C 364749e8be7SAnson Huang * Use universal formula now and only need sensor value @ 25C 365749e8be7SAnson Huang * slope = 0.4297157 - (0.0015976 * 25C fuse) 366ca3de46bSShawn Guo */ 367e4bb2240SUwe Kleine-König n1 = ocotp_ana1 >> 20; 368ca3de46bSShawn Guo t1 = 25; /* t1 always 25C */ 369ca3de46bSShawn Guo 370ca3de46bSShawn Guo /* 371749e8be7SAnson Huang * Derived from linear interpolation: 372749e8be7SAnson Huang * slope = 0.4297157 - (0.0015976 * 25C fuse) 373749e8be7SAnson Huang * slope = (FACTOR2 - FACTOR1 * n1) / FACTOR0 374749e8be7SAnson Huang * (Nmeas - n1) / (Tmeas - t1) = slope 375ca3de46bSShawn Guo * We want to reduce this down to the minimum computation necessary 376ca3de46bSShawn Guo * for each temperature read. Also, we want Tmeas in millicelsius 377ca3de46bSShawn Guo * and we don't want to lose precision from integer division. So... 378749e8be7SAnson Huang * Tmeas = (Nmeas - n1) / slope + t1 379749e8be7SAnson Huang * milli_Tmeas = 1000 * (Nmeas - n1) / slope + 1000 * t1 380749e8be7SAnson Huang * milli_Tmeas = -1000 * (n1 - Nmeas) / slope + 1000 * t1 381749e8be7SAnson Huang * Let constant c1 = (-1000 / slope) 382749e8be7SAnson Huang * milli_Tmeas = (n1 - Nmeas) * c1 + 1000 * t1 383749e8be7SAnson Huang * Let constant c2 = n1 *c1 + 1000 * t1 384749e8be7SAnson Huang * milli_Tmeas = c2 - Nmeas * c1 385ca3de46bSShawn Guo */ 386749e8be7SAnson Huang temp64 = FACTOR0; 387749e8be7SAnson Huang temp64 *= 1000; 388749e8be7SAnson Huang do_div(temp64, FACTOR1 * n1 - FACTOR2); 389749e8be7SAnson Huang data->c1 = temp64; 390749e8be7SAnson Huang data->c2 = n1 * data->c1 + 1000 * t1; 391ca3de46bSShawn Guo 392ae621557SLeonard Crestez return 0; 393a2291badSTim Harvey } 394a2291badSTim Harvey 395e4bb2240SUwe Kleine-König static void imx_init_temp_grade(struct platform_device *pdev, u32 ocotp_mem0) 396ae621557SLeonard Crestez { 397ae621557SLeonard Crestez struct imx_thermal_data *data = platform_get_drvdata(pdev); 398ae621557SLeonard Crestez 399a2291badSTim Harvey /* The maximum die temp is specified by the Temperature Grade */ 400e4bb2240SUwe Kleine-König switch ((ocotp_mem0 >> 6) & 0x3) { 401a2291badSTim Harvey case 0: /* Commercial (0 to 95C) */ 402a2291badSTim Harvey data->temp_grade = "Commercial"; 403a2291badSTim Harvey data->temp_max = 95000; 404a2291badSTim Harvey break; 405a2291badSTim Harvey case 1: /* Extended Commercial (-20 to 105C) */ 406a2291badSTim Harvey data->temp_grade = "Extended Commercial"; 407a2291badSTim Harvey data->temp_max = 105000; 408a2291badSTim Harvey break; 409a2291badSTim Harvey case 2: /* Industrial (-40 to 105C) */ 410a2291badSTim Harvey data->temp_grade = "Industrial"; 411a2291badSTim Harvey data->temp_max = 105000; 412a2291badSTim Harvey break; 413a2291badSTim Harvey case 3: /* Automotive (-40 to 125C) */ 414a2291badSTim Harvey data->temp_grade = "Automotive"; 415a2291badSTim Harvey data->temp_max = 125000; 416a2291badSTim Harvey break; 417a2291badSTim Harvey } 418017e5142SPhilipp Zabel 419017e5142SPhilipp Zabel /* 420a2291badSTim Harvey * Set the critical trip point at 5C under max 421a2291badSTim Harvey * Set the passive trip point at 10C under max (can change via sysfs) 422017e5142SPhilipp Zabel */ 423a2291badSTim Harvey data->temp_critical = data->temp_max - (1000 * 5); 424a2291badSTim Harvey data->temp_passive = data->temp_max - (1000 * 10); 425ae621557SLeonard Crestez } 426ae621557SLeonard Crestez 427ae621557SLeonard Crestez static int imx_init_from_tempmon_data(struct platform_device *pdev) 428ae621557SLeonard Crestez { 429ae621557SLeonard Crestez struct regmap *map; 430ae621557SLeonard Crestez int ret; 431ae621557SLeonard Crestez u32 val; 432ae621557SLeonard Crestez 433ae621557SLeonard Crestez map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 434ae621557SLeonard Crestez "fsl,tempmon-data"); 435ae621557SLeonard Crestez if (IS_ERR(map)) { 436ae621557SLeonard Crestez ret = PTR_ERR(map); 437ae621557SLeonard Crestez dev_err(&pdev->dev, "failed to get sensor regmap: %d\n", ret); 438ae621557SLeonard Crestez return ret; 439ae621557SLeonard Crestez } 440ae621557SLeonard Crestez 441ae621557SLeonard Crestez ret = regmap_read(map, OCOTP_ANA1, &val); 442ae621557SLeonard Crestez if (ret) { 443ae621557SLeonard Crestez dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret); 444ae621557SLeonard Crestez return ret; 445ae621557SLeonard Crestez } 446ae621557SLeonard Crestez ret = imx_init_calib(pdev, val); 447ae621557SLeonard Crestez if (ret) 448ae621557SLeonard Crestez return ret; 449ae621557SLeonard Crestez 450ae621557SLeonard Crestez ret = regmap_read(map, OCOTP_MEM0, &val); 451ae621557SLeonard Crestez if (ret) { 452ae621557SLeonard Crestez dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret); 453ae621557SLeonard Crestez return ret; 454ae621557SLeonard Crestez } 455ae621557SLeonard Crestez imx_init_temp_grade(pdev, val); 456ae621557SLeonard Crestez 457ae621557SLeonard Crestez return 0; 458ae621557SLeonard Crestez } 459ae621557SLeonard Crestez 460ae621557SLeonard Crestez static int imx_init_from_nvmem_cells(struct platform_device *pdev) 461ae621557SLeonard Crestez { 462ae621557SLeonard Crestez int ret; 463ae621557SLeonard Crestez u32 val; 464ae621557SLeonard Crestez 465ae621557SLeonard Crestez ret = nvmem_cell_read_u32(&pdev->dev, "calib", &val); 466ae621557SLeonard Crestez if (ret) 467ae621557SLeonard Crestez return ret; 468ae621557SLeonard Crestez imx_init_calib(pdev, val); 469ae621557SLeonard Crestez 470ae621557SLeonard Crestez ret = nvmem_cell_read_u32(&pdev->dev, "temp_grade", &val); 471ae621557SLeonard Crestez if (ret) 472ae621557SLeonard Crestez return ret; 473ae621557SLeonard Crestez imx_init_temp_grade(pdev, val); 474017e5142SPhilipp Zabel 475ca3de46bSShawn Guo return 0; 476ca3de46bSShawn Guo } 477ca3de46bSShawn Guo 47837713a1eSPhilipp Zabel static irqreturn_t imx_thermal_alarm_irq(int irq, void *dev) 47937713a1eSPhilipp Zabel { 48037713a1eSPhilipp Zabel struct imx_thermal_data *data = dev; 48137713a1eSPhilipp Zabel 48237713a1eSPhilipp Zabel disable_irq_nosync(irq); 48337713a1eSPhilipp Zabel data->irq_enabled = false; 48437713a1eSPhilipp Zabel 48537713a1eSPhilipp Zabel return IRQ_WAKE_THREAD; 48637713a1eSPhilipp Zabel } 48737713a1eSPhilipp Zabel 48837713a1eSPhilipp Zabel static irqreturn_t imx_thermal_alarm_irq_thread(int irq, void *dev) 48937713a1eSPhilipp Zabel { 49037713a1eSPhilipp Zabel struct imx_thermal_data *data = dev; 49137713a1eSPhilipp Zabel 49217e8351aSSascha Hauer dev_dbg(&data->tz->device, "THERMAL ALARM: T > %d\n", 49337713a1eSPhilipp Zabel data->alarm_temp / 1000); 49437713a1eSPhilipp Zabel 4950e70f466SSrinivas Pandruvada thermal_zone_device_update(data->tz, THERMAL_EVENT_UNSPECIFIED); 49637713a1eSPhilipp Zabel 49737713a1eSPhilipp Zabel return IRQ_HANDLED; 49837713a1eSPhilipp Zabel } 49937713a1eSPhilipp Zabel 5003c94f17eSAnson Huang static const struct of_device_id of_imx_thermal_match[] = { 5013c94f17eSAnson Huang { .compatible = "fsl,imx6q-tempmon", .data = &thermal_imx6q_data, }, 5023c94f17eSAnson Huang { .compatible = "fsl,imx6sx-tempmon", .data = &thermal_imx6sx_data, }, 5033c94f17eSAnson Huang { /* end */ } 5043c94f17eSAnson Huang }; 5053c94f17eSAnson Huang MODULE_DEVICE_TABLE(of, of_imx_thermal_match); 5063c94f17eSAnson Huang 507ca3de46bSShawn Guo static int imx_thermal_probe(struct platform_device *pdev) 508ca3de46bSShawn Guo { 509ca3de46bSShawn Guo struct imx_thermal_data *data; 510ca3de46bSShawn Guo struct regmap *map; 51137713a1eSPhilipp Zabel int measure_freq; 512ca3de46bSShawn Guo int ret; 513ca3de46bSShawn Guo 514ca3de46bSShawn Guo data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 515ca3de46bSShawn Guo if (!data) 516ca3de46bSShawn Guo return -ENOMEM; 517ca3de46bSShawn Guo 518ca3de46bSShawn Guo map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "fsl,tempmon"); 519ca3de46bSShawn Guo if (IS_ERR(map)) { 520ca3de46bSShawn Guo ret = PTR_ERR(map); 521ca3de46bSShawn Guo dev_err(&pdev->dev, "failed to get tempmon regmap: %d\n", ret); 522ca3de46bSShawn Guo return ret; 523ca3de46bSShawn Guo } 524ca3de46bSShawn Guo data->tempmon = map; 525ca3de46bSShawn Guo 526829bc78aSCorentin LABBE data->socdata = of_device_get_match_data(&pdev->dev); 5278b051ec3SShailendra Verma if (!data->socdata) { 5288b051ec3SShailendra Verma dev_err(&pdev->dev, "no device match found\n"); 5298b051ec3SShailendra Verma return -ENODEV; 5308b051ec3SShailendra Verma } 5313c94f17eSAnson Huang 5323c94f17eSAnson Huang /* make sure the IRQ flag is clear before enabling irq on i.MX6SX */ 5333c94f17eSAnson Huang if (data->socdata->version == TEMPMON_IMX6SX) { 5343c94f17eSAnson Huang regmap_write(map, MISC1 + REG_CLR, MISC1_IRQ_TEMPHIGH | 5353c94f17eSAnson Huang MISC1_IRQ_TEMPLOW | MISC1_IRQ_TEMPPANIC); 5363c94f17eSAnson Huang /* 5373c94f17eSAnson Huang * reset value of LOW ALARM is incorrect, set it to lowest 5383c94f17eSAnson Huang * value to avoid false trigger of low alarm. 5393c94f17eSAnson Huang */ 5403c94f17eSAnson Huang regmap_write(map, TEMPSENSE2 + REG_SET, 5413c94f17eSAnson Huang TEMPSENSE2_LOW_VALUE_MASK); 5423c94f17eSAnson Huang } 5433c94f17eSAnson Huang 54437713a1eSPhilipp Zabel data->irq = platform_get_irq(pdev, 0); 54537713a1eSPhilipp Zabel if (data->irq < 0) 54637713a1eSPhilipp Zabel return data->irq; 54737713a1eSPhilipp Zabel 548ca3de46bSShawn Guo platform_set_drvdata(pdev, data); 549ca3de46bSShawn Guo 550ae621557SLeonard Crestez if (of_find_property(pdev->dev.of_node, "nvmem-cells", NULL)) { 551ae621557SLeonard Crestez ret = imx_init_from_nvmem_cells(pdev); 552ae621557SLeonard Crestez if (ret == -EPROBE_DEFER) 553ca3de46bSShawn Guo return ret; 554ae621557SLeonard Crestez if (ret) { 555ae621557SLeonard Crestez dev_err(&pdev->dev, "failed to init from nvmem: %d\n", 556ae621557SLeonard Crestez ret); 557ae621557SLeonard Crestez return ret; 558ae621557SLeonard Crestez } 559ae621557SLeonard Crestez } else { 560ae621557SLeonard Crestez ret = imx_init_from_tempmon_data(pdev); 561ae621557SLeonard Crestez if (ret) { 562ae621557SLeonard Crestez dev_err(&pdev->dev, "failed to init from from fsl,tempmon-data\n"); 563ae621557SLeonard Crestez return ret; 564ae621557SLeonard Crestez } 565ca3de46bSShawn Guo } 566ca3de46bSShawn Guo 567ca3de46bSShawn Guo /* Make sure sensor is in known good state for measurements */ 568ca3de46bSShawn Guo regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); 569ca3de46bSShawn Guo regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); 570ca3de46bSShawn Guo regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ); 571ca3de46bSShawn Guo regmap_write(map, MISC0 + REG_SET, MISC0_REFTOP_SELBIASOFF); 572ca3de46bSShawn Guo regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); 573ca3de46bSShawn Guo 5744d753aa7SViresh Kumar data->policy = cpufreq_cpu_get(0); 5754d753aa7SViresh Kumar if (!data->policy) { 5764d753aa7SViresh Kumar pr_debug("%s: CPUFreq policy not found\n", __func__); 5774d753aa7SViresh Kumar return -EPROBE_DEFER; 5784d753aa7SViresh Kumar } 5794d753aa7SViresh Kumar 5804d753aa7SViresh Kumar data->cdev = cpufreq_cooling_register(data->policy); 581ca3de46bSShawn Guo if (IS_ERR(data->cdev)) { 582ca3de46bSShawn Guo ret = PTR_ERR(data->cdev); 583ca3de46bSShawn Guo dev_err(&pdev->dev, 5844d753aa7SViresh Kumar "failed to register cpufreq cooling device: %d\n", ret); 5854d753aa7SViresh Kumar cpufreq_cpu_put(data->policy); 586ca3de46bSShawn Guo return ret; 587ca3de46bSShawn Guo } 588ca3de46bSShawn Guo 58990a21ff5SHeiner Kallweit data->thermal_clk = devm_clk_get(&pdev->dev, NULL); 59090a21ff5SHeiner Kallweit if (IS_ERR(data->thermal_clk)) { 59190a21ff5SHeiner Kallweit ret = PTR_ERR(data->thermal_clk); 59290a21ff5SHeiner Kallweit if (ret != -EPROBE_DEFER) 59390a21ff5SHeiner Kallweit dev_err(&pdev->dev, 59490a21ff5SHeiner Kallweit "failed to get thermal clk: %d\n", ret); 59590a21ff5SHeiner Kallweit cpufreq_cooling_unregister(data->cdev); 5964d753aa7SViresh Kumar cpufreq_cpu_put(data->policy); 59790a21ff5SHeiner Kallweit return ret; 59890a21ff5SHeiner Kallweit } 59990a21ff5SHeiner Kallweit 60090a21ff5SHeiner Kallweit /* 60190a21ff5SHeiner Kallweit * Thermal sensor needs clk on to get correct value, normally 60290a21ff5SHeiner Kallweit * we should enable its clk before taking measurement and disable 60390a21ff5SHeiner Kallweit * clk after measurement is done, but if alarm function is enabled, 60490a21ff5SHeiner Kallweit * hardware will auto measure the temperature periodically, so we 60590a21ff5SHeiner Kallweit * need to keep the clk always on for alarm function. 60690a21ff5SHeiner Kallweit */ 60790a21ff5SHeiner Kallweit ret = clk_prepare_enable(data->thermal_clk); 60890a21ff5SHeiner Kallweit if (ret) { 60990a21ff5SHeiner Kallweit dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret); 61090a21ff5SHeiner Kallweit cpufreq_cooling_unregister(data->cdev); 6114d753aa7SViresh Kumar cpufreq_cpu_put(data->policy); 61290a21ff5SHeiner Kallweit return ret; 61390a21ff5SHeiner Kallweit } 61490a21ff5SHeiner Kallweit 615ca3de46bSShawn Guo data->tz = thermal_zone_device_register("imx_thermal_zone", 616017e5142SPhilipp Zabel IMX_TRIP_NUM, 617017e5142SPhilipp Zabel BIT(IMX_TRIP_PASSIVE), data, 618ca3de46bSShawn Guo &imx_tz_ops, NULL, 619ca3de46bSShawn Guo IMX_PASSIVE_DELAY, 620ca3de46bSShawn Guo IMX_POLLING_DELAY); 621ca3de46bSShawn Guo if (IS_ERR(data->tz)) { 622ca3de46bSShawn Guo ret = PTR_ERR(data->tz); 623ca3de46bSShawn Guo dev_err(&pdev->dev, 624ca3de46bSShawn Guo "failed to register thermal zone device %d\n", ret); 62590a21ff5SHeiner Kallweit clk_disable_unprepare(data->thermal_clk); 626ca3de46bSShawn Guo cpufreq_cooling_unregister(data->cdev); 6274d753aa7SViresh Kumar cpufreq_cpu_put(data->policy); 628ca3de46bSShawn Guo return ret; 629ca3de46bSShawn Guo } 630ca3de46bSShawn Guo 631a2291badSTim Harvey dev_info(&pdev->dev, "%s CPU temperature grade - max:%dC" 632a2291badSTim Harvey " critical:%dC passive:%dC\n", data->temp_grade, 633a2291badSTim Harvey data->temp_max / 1000, data->temp_critical / 1000, 634a2291badSTim Harvey data->temp_passive / 1000); 635a2291badSTim Harvey 63637713a1eSPhilipp Zabel /* Enable measurements at ~ 10 Hz */ 63737713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ); 63837713a1eSPhilipp Zabel measure_freq = DIV_ROUND_UP(32768, 10); /* 10 Hz */ 63937713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE1 + REG_SET, measure_freq); 64037713a1eSPhilipp Zabel imx_set_alarm_temp(data, data->temp_passive); 6413c94f17eSAnson Huang 6423c94f17eSAnson Huang if (data->socdata->version == TEMPMON_IMX6SX) 6433c94f17eSAnson Huang imx_set_panic_temp(data, data->temp_critical); 6443c94f17eSAnson Huang 64537713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); 64637713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); 64737713a1eSPhilipp Zabel 64884866ee5SBai Ping ret = devm_request_threaded_irq(&pdev->dev, data->irq, 64984866ee5SBai Ping imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread, 65084866ee5SBai Ping 0, "imx_thermal", data); 65184866ee5SBai Ping if (ret < 0) { 65284866ee5SBai Ping dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret); 65384866ee5SBai Ping clk_disable_unprepare(data->thermal_clk); 65484866ee5SBai Ping thermal_zone_device_unregister(data->tz); 65584866ee5SBai Ping cpufreq_cooling_unregister(data->cdev); 6564d753aa7SViresh Kumar cpufreq_cpu_put(data->policy); 65784866ee5SBai Ping return ret; 65884866ee5SBai Ping } 65984866ee5SBai Ping 66037713a1eSPhilipp Zabel data->irq_enabled = true; 661ca3de46bSShawn Guo data->mode = THERMAL_DEVICE_ENABLED; 662ca3de46bSShawn Guo 663ca3de46bSShawn Guo return 0; 664ca3de46bSShawn Guo } 665ca3de46bSShawn Guo 666ca3de46bSShawn Guo static int imx_thermal_remove(struct platform_device *pdev) 667ca3de46bSShawn Guo { 668ca3de46bSShawn Guo struct imx_thermal_data *data = platform_get_drvdata(pdev); 66937713a1eSPhilipp Zabel struct regmap *map = data->tempmon; 67037713a1eSPhilipp Zabel 67137713a1eSPhilipp Zabel /* Disable measurements */ 67237713a1eSPhilipp Zabel regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); 673329fe7b1SAnson Huang if (!IS_ERR(data->thermal_clk)) 674329fe7b1SAnson Huang clk_disable_unprepare(data->thermal_clk); 675ca3de46bSShawn Guo 676ca3de46bSShawn Guo thermal_zone_device_unregister(data->tz); 677ca3de46bSShawn Guo cpufreq_cooling_unregister(data->cdev); 6784d753aa7SViresh Kumar cpufreq_cpu_put(data->policy); 679ca3de46bSShawn Guo 680ca3de46bSShawn Guo return 0; 681ca3de46bSShawn Guo } 682ca3de46bSShawn Guo 683ca3de46bSShawn Guo #ifdef CONFIG_PM_SLEEP 684ca3de46bSShawn Guo static int imx_thermal_suspend(struct device *dev) 685ca3de46bSShawn Guo { 686ca3de46bSShawn Guo struct imx_thermal_data *data = dev_get_drvdata(dev); 687ca3de46bSShawn Guo struct regmap *map = data->tempmon; 688ca3de46bSShawn Guo 689ca3de46bSShawn Guo /* 690b46cce59SAnson Huang * Need to disable thermal sensor, otherwise, when thermal core 691b46cce59SAnson Huang * try to get temperature before thermal sensor resume, a wrong 692b46cce59SAnson Huang * temperature will be read as the thermal sensor is powered 693b46cce59SAnson Huang * down. 694ca3de46bSShawn Guo */ 695b46cce59SAnson Huang regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); 696b46cce59SAnson Huang regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); 697b46cce59SAnson Huang data->mode = THERMAL_DEVICE_DISABLED; 698d26eef8bSAnson Huang clk_disable_unprepare(data->thermal_clk); 699ca3de46bSShawn Guo 700ca3de46bSShawn Guo return 0; 701ca3de46bSShawn Guo } 702ca3de46bSShawn Guo 703ca3de46bSShawn Guo static int imx_thermal_resume(struct device *dev) 704ca3de46bSShawn Guo { 705b46cce59SAnson Huang struct imx_thermal_data *data = dev_get_drvdata(dev); 706b46cce59SAnson Huang struct regmap *map = data->tempmon; 707e3bdc8d7SArvind Yadav int ret; 708b46cce59SAnson Huang 709e3bdc8d7SArvind Yadav ret = clk_prepare_enable(data->thermal_clk); 710e3bdc8d7SArvind Yadav if (ret) 711e3bdc8d7SArvind Yadav return ret; 712b46cce59SAnson Huang /* Enabled thermal sensor after resume */ 713b46cce59SAnson Huang regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); 714b46cce59SAnson Huang regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); 715b46cce59SAnson Huang data->mode = THERMAL_DEVICE_ENABLED; 716b46cce59SAnson Huang 717ca3de46bSShawn Guo return 0; 718ca3de46bSShawn Guo } 719ca3de46bSShawn Guo #endif 720ca3de46bSShawn Guo 721ca3de46bSShawn Guo static SIMPLE_DEV_PM_OPS(imx_thermal_pm_ops, 722ca3de46bSShawn Guo imx_thermal_suspend, imx_thermal_resume); 723ca3de46bSShawn Guo 724ca3de46bSShawn Guo static struct platform_driver imx_thermal = { 725ca3de46bSShawn Guo .driver = { 726ca3de46bSShawn Guo .name = "imx_thermal", 727ca3de46bSShawn Guo .pm = &imx_thermal_pm_ops, 728ca3de46bSShawn Guo .of_match_table = of_imx_thermal_match, 729ca3de46bSShawn Guo }, 730ca3de46bSShawn Guo .probe = imx_thermal_probe, 731ca3de46bSShawn Guo .remove = imx_thermal_remove, 732ca3de46bSShawn Guo }; 733ca3de46bSShawn Guo module_platform_driver(imx_thermal); 734ca3de46bSShawn Guo 735ca3de46bSShawn Guo MODULE_AUTHOR("Freescale Semiconductor, Inc."); 736ca3de46bSShawn Guo MODULE_DESCRIPTION("Thermal driver for Freescale i.MX SoCs"); 737ca3de46bSShawn Guo MODULE_LICENSE("GPL v2"); 738ca3de46bSShawn Guo MODULE_ALIAS("platform:imx-thermal"); 739