145f8b0ddSFabio Estevam // SPDX-License-Identifier: GPL-2.0 245f8b0ddSFabio Estevam // 345f8b0ddSFabio Estevam // Copyright 2013 Freescale Semiconductor, Inc. 4ca3de46bSShawn Guo 5329fe7b1SAnson Huang #include <linux/clk.h> 6a1d00154SBastian Stender #include <linux/cpu.h> 74d753aa7SViresh Kumar #include <linux/cpufreq.h> 8ca3de46bSShawn Guo #include <linux/cpu_cooling.h> 9ca3de46bSShawn Guo #include <linux/delay.h> 10ca3de46bSShawn Guo #include <linux/device.h> 11ca3de46bSShawn Guo #include <linux/init.h> 1237713a1eSPhilipp Zabel #include <linux/interrupt.h> 13ca3de46bSShawn Guo #include <linux/io.h> 14ca3de46bSShawn Guo #include <linux/kernel.h> 15ca3de46bSShawn Guo #include <linux/mfd/syscon.h> 16ca3de46bSShawn Guo #include <linux/module.h> 17ca3de46bSShawn Guo #include <linux/of.h> 183c94f17eSAnson Huang #include <linux/of_device.h> 19ca3de46bSShawn Guo #include <linux/platform_device.h> 20ca3de46bSShawn Guo #include <linux/regmap.h> 21ca3de46bSShawn Guo #include <linux/slab.h> 22ca3de46bSShawn Guo #include <linux/thermal.h> 23ca3de46bSShawn Guo #include <linux/types.h> 24ae621557SLeonard Crestez #include <linux/nvmem-consumer.h> 25ca3de46bSShawn Guo 26ca3de46bSShawn Guo #define REG_SET 0x4 27ca3de46bSShawn Guo #define REG_CLR 0x8 28ca3de46bSShawn Guo #define REG_TOG 0xc 29ca3de46bSShawn Guo 30f085f672SAnson Huang /* i.MX6 specific */ 31f085f672SAnson Huang #define IMX6_MISC0 0x0150 32f085f672SAnson Huang #define IMX6_MISC0_REFTOP_SELBIASOFF (1 << 3) 33f085f672SAnson Huang #define IMX6_MISC1 0x0160 34f085f672SAnson Huang #define IMX6_MISC1_IRQ_TEMPHIGH (1 << 29) 353c94f17eSAnson Huang /* Below LOW and PANIC bits are only for TEMPMON_IMX6SX */ 36f085f672SAnson Huang #define IMX6_MISC1_IRQ_TEMPLOW (1 << 28) 37f085f672SAnson Huang #define IMX6_MISC1_IRQ_TEMPPANIC (1 << 27) 38ca3de46bSShawn Guo 39f085f672SAnson Huang #define IMX6_TEMPSENSE0 0x0180 40f085f672SAnson Huang #define IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT 20 41f085f672SAnson Huang #define IMX6_TEMPSENSE0_ALARM_VALUE_MASK (0xfff << 20) 42f085f672SAnson Huang #define IMX6_TEMPSENSE0_TEMP_CNT_SHIFT 8 43f085f672SAnson Huang #define IMX6_TEMPSENSE0_TEMP_CNT_MASK (0xfff << 8) 44f085f672SAnson Huang #define IMX6_TEMPSENSE0_FINISHED (1 << 2) 45f085f672SAnson Huang #define IMX6_TEMPSENSE0_MEASURE_TEMP (1 << 1) 46f085f672SAnson Huang #define IMX6_TEMPSENSE0_POWER_DOWN (1 << 0) 47ca3de46bSShawn Guo 48f085f672SAnson Huang #define IMX6_TEMPSENSE1 0x0190 49f085f672SAnson Huang #define IMX6_TEMPSENSE1_MEASURE_FREQ 0xffff 50f085f672SAnson Huang #define IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT 0 51ca3de46bSShawn Guo 52a2291badSTim Harvey #define OCOTP_MEM0 0x0480 53ca3de46bSShawn Guo #define OCOTP_ANA1 0x04e0 54ca3de46bSShawn Guo 55f085f672SAnson Huang /* Below TEMPSENSE2 is only for TEMPMON_IMX6SX */ 56f085f672SAnson Huang #define IMX6_TEMPSENSE2 0x0290 57f085f672SAnson Huang #define IMX6_TEMPSENSE2_LOW_VALUE_SHIFT 0 58f085f672SAnson Huang #define IMX6_TEMPSENSE2_LOW_VALUE_MASK 0xfff 59f085f672SAnson Huang #define IMX6_TEMPSENSE2_PANIC_VALUE_SHIFT 16 60f085f672SAnson Huang #define IMX6_TEMPSENSE2_PANIC_VALUE_MASK 0xfff0000 61f085f672SAnson Huang 62f085f672SAnson Huang /* i.MX7 specific */ 63f085f672SAnson Huang #define IMX7_ANADIG_DIGPROG 0x800 64f085f672SAnson Huang #define IMX7_TEMPSENSE0 0x300 65f085f672SAnson Huang #define IMX7_TEMPSENSE0_PANIC_ALARM_SHIFT 18 66f085f672SAnson Huang #define IMX7_TEMPSENSE0_PANIC_ALARM_MASK (0x1ff << 18) 67f085f672SAnson Huang #define IMX7_TEMPSENSE0_HIGH_ALARM_SHIFT 9 68f085f672SAnson Huang #define IMX7_TEMPSENSE0_HIGH_ALARM_MASK (0x1ff << 9) 69f085f672SAnson Huang #define IMX7_TEMPSENSE0_LOW_ALARM_SHIFT 0 70f085f672SAnson Huang #define IMX7_TEMPSENSE0_LOW_ALARM_MASK 0x1ff 71f085f672SAnson Huang 72f085f672SAnson Huang #define IMX7_TEMPSENSE1 0x310 73f085f672SAnson Huang #define IMX7_TEMPSENSE1_MEASURE_FREQ_SHIFT 16 74f085f672SAnson Huang #define IMX7_TEMPSENSE1_MEASURE_FREQ_MASK (0xffff << 16) 75f085f672SAnson Huang #define IMX7_TEMPSENSE1_FINISHED (1 << 11) 76f085f672SAnson Huang #define IMX7_TEMPSENSE1_MEASURE_TEMP (1 << 10) 77f085f672SAnson Huang #define IMX7_TEMPSENSE1_POWER_DOWN (1 << 9) 78f085f672SAnson Huang #define IMX7_TEMPSENSE1_TEMP_VALUE_SHIFT 0 79f085f672SAnson Huang #define IMX7_TEMPSENSE1_TEMP_VALUE_MASK 0x1ff 80f085f672SAnson Huang 81ca3de46bSShawn Guo /* The driver supports 1 passive trip point and 1 critical trip point */ 82ca3de46bSShawn Guo enum imx_thermal_trip { 83ca3de46bSShawn Guo IMX_TRIP_PASSIVE, 84ca3de46bSShawn Guo IMX_TRIP_CRITICAL, 85ca3de46bSShawn Guo IMX_TRIP_NUM, 86ca3de46bSShawn Guo }; 87ca3de46bSShawn Guo 88ca3de46bSShawn Guo #define IMX_POLLING_DELAY 2000 /* millisecond */ 89ca3de46bSShawn Guo #define IMX_PASSIVE_DELAY 1000 90ca3de46bSShawn Guo 913c94f17eSAnson Huang #define TEMPMON_IMX6Q 1 923c94f17eSAnson Huang #define TEMPMON_IMX6SX 2 93f085f672SAnson Huang #define TEMPMON_IMX7D 3 943c94f17eSAnson Huang 953c94f17eSAnson Huang struct thermal_soc_data { 963c94f17eSAnson Huang u32 version; 97f085f672SAnson Huang 98f085f672SAnson Huang u32 sensor_ctrl; 99f085f672SAnson Huang u32 power_down_mask; 100f085f672SAnson Huang u32 measure_temp_mask; 101f085f672SAnson Huang 102f085f672SAnson Huang u32 measure_freq_ctrl; 103f085f672SAnson Huang u32 measure_freq_mask; 104f085f672SAnson Huang u32 measure_freq_shift; 105f085f672SAnson Huang 106f085f672SAnson Huang u32 temp_data; 107f085f672SAnson Huang u32 temp_value_mask; 108f085f672SAnson Huang u32 temp_value_shift; 109f085f672SAnson Huang u32 temp_valid_mask; 110f085f672SAnson Huang 111f085f672SAnson Huang u32 panic_alarm_ctrl; 112f085f672SAnson Huang u32 panic_alarm_mask; 113f085f672SAnson Huang u32 panic_alarm_shift; 114f085f672SAnson Huang 115f085f672SAnson Huang u32 high_alarm_ctrl; 116f085f672SAnson Huang u32 high_alarm_mask; 117f085f672SAnson Huang u32 high_alarm_shift; 118f085f672SAnson Huang 119f085f672SAnson Huang u32 low_alarm_ctrl; 120f085f672SAnson Huang u32 low_alarm_mask; 121f085f672SAnson Huang u32 low_alarm_shift; 1223c94f17eSAnson Huang }; 1233c94f17eSAnson Huang 1243c94f17eSAnson Huang static struct thermal_soc_data thermal_imx6q_data = { 1253c94f17eSAnson Huang .version = TEMPMON_IMX6Q, 126f085f672SAnson Huang 127f085f672SAnson Huang .sensor_ctrl = IMX6_TEMPSENSE0, 128f085f672SAnson Huang .power_down_mask = IMX6_TEMPSENSE0_POWER_DOWN, 129f085f672SAnson Huang .measure_temp_mask = IMX6_TEMPSENSE0_MEASURE_TEMP, 130f085f672SAnson Huang 131f085f672SAnson Huang .measure_freq_ctrl = IMX6_TEMPSENSE1, 132f085f672SAnson Huang .measure_freq_shift = IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT, 133f085f672SAnson Huang .measure_freq_mask = IMX6_TEMPSENSE1_MEASURE_FREQ, 134f085f672SAnson Huang 135f085f672SAnson Huang .temp_data = IMX6_TEMPSENSE0, 136f085f672SAnson Huang .temp_value_mask = IMX6_TEMPSENSE0_TEMP_CNT_MASK, 137f085f672SAnson Huang .temp_value_shift = IMX6_TEMPSENSE0_TEMP_CNT_SHIFT, 138f085f672SAnson Huang .temp_valid_mask = IMX6_TEMPSENSE0_FINISHED, 139f085f672SAnson Huang 140f085f672SAnson Huang .high_alarm_ctrl = IMX6_TEMPSENSE0, 141f085f672SAnson Huang .high_alarm_mask = IMX6_TEMPSENSE0_ALARM_VALUE_MASK, 142f085f672SAnson Huang .high_alarm_shift = IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT, 1433c94f17eSAnson Huang }; 1443c94f17eSAnson Huang 1453c94f17eSAnson Huang static struct thermal_soc_data thermal_imx6sx_data = { 1463c94f17eSAnson Huang .version = TEMPMON_IMX6SX, 147f085f672SAnson Huang 148f085f672SAnson Huang .sensor_ctrl = IMX6_TEMPSENSE0, 149f085f672SAnson Huang .power_down_mask = IMX6_TEMPSENSE0_POWER_DOWN, 150f085f672SAnson Huang .measure_temp_mask = IMX6_TEMPSENSE0_MEASURE_TEMP, 151f085f672SAnson Huang 152f085f672SAnson Huang .measure_freq_ctrl = IMX6_TEMPSENSE1, 153f085f672SAnson Huang .measure_freq_shift = IMX6_TEMPSENSE1_MEASURE_FREQ_SHIFT, 154f085f672SAnson Huang .measure_freq_mask = IMX6_TEMPSENSE1_MEASURE_FREQ, 155f085f672SAnson Huang 156f085f672SAnson Huang .temp_data = IMX6_TEMPSENSE0, 157f085f672SAnson Huang .temp_value_mask = IMX6_TEMPSENSE0_TEMP_CNT_MASK, 158f085f672SAnson Huang .temp_value_shift = IMX6_TEMPSENSE0_TEMP_CNT_SHIFT, 159f085f672SAnson Huang .temp_valid_mask = IMX6_TEMPSENSE0_FINISHED, 160f085f672SAnson Huang 161f085f672SAnson Huang .high_alarm_ctrl = IMX6_TEMPSENSE0, 162f085f672SAnson Huang .high_alarm_mask = IMX6_TEMPSENSE0_ALARM_VALUE_MASK, 163f085f672SAnson Huang .high_alarm_shift = IMX6_TEMPSENSE0_ALARM_VALUE_SHIFT, 164f085f672SAnson Huang 165f085f672SAnson Huang .panic_alarm_ctrl = IMX6_TEMPSENSE2, 166f085f672SAnson Huang .panic_alarm_mask = IMX6_TEMPSENSE2_PANIC_VALUE_MASK, 167f085f672SAnson Huang .panic_alarm_shift = IMX6_TEMPSENSE2_PANIC_VALUE_SHIFT, 168f085f672SAnson Huang 169f085f672SAnson Huang .low_alarm_ctrl = IMX6_TEMPSENSE2, 170f085f672SAnson Huang .low_alarm_mask = IMX6_TEMPSENSE2_LOW_VALUE_MASK, 171f085f672SAnson Huang .low_alarm_shift = IMX6_TEMPSENSE2_LOW_VALUE_SHIFT, 172f085f672SAnson Huang }; 173f085f672SAnson Huang 174f085f672SAnson Huang static struct thermal_soc_data thermal_imx7d_data = { 175f085f672SAnson Huang .version = TEMPMON_IMX7D, 176f085f672SAnson Huang 177f085f672SAnson Huang .sensor_ctrl = IMX7_TEMPSENSE1, 178f085f672SAnson Huang .power_down_mask = IMX7_TEMPSENSE1_POWER_DOWN, 179f085f672SAnson Huang .measure_temp_mask = IMX7_TEMPSENSE1_MEASURE_TEMP, 180f085f672SAnson Huang 181f085f672SAnson Huang .measure_freq_ctrl = IMX7_TEMPSENSE1, 182f085f672SAnson Huang .measure_freq_shift = IMX7_TEMPSENSE1_MEASURE_FREQ_SHIFT, 183f085f672SAnson Huang .measure_freq_mask = IMX7_TEMPSENSE1_MEASURE_FREQ_MASK, 184f085f672SAnson Huang 185f085f672SAnson Huang .temp_data = IMX7_TEMPSENSE1, 186f085f672SAnson Huang .temp_value_mask = IMX7_TEMPSENSE1_TEMP_VALUE_MASK, 187f085f672SAnson Huang .temp_value_shift = IMX7_TEMPSENSE1_TEMP_VALUE_SHIFT, 188f085f672SAnson Huang .temp_valid_mask = IMX7_TEMPSENSE1_FINISHED, 189f085f672SAnson Huang 190f085f672SAnson Huang .panic_alarm_ctrl = IMX7_TEMPSENSE1, 191f085f672SAnson Huang .panic_alarm_mask = IMX7_TEMPSENSE0_PANIC_ALARM_MASK, 192f085f672SAnson Huang .panic_alarm_shift = IMX7_TEMPSENSE0_PANIC_ALARM_SHIFT, 193f085f672SAnson Huang 194f085f672SAnson Huang .high_alarm_ctrl = IMX7_TEMPSENSE0, 195f085f672SAnson Huang .high_alarm_mask = IMX7_TEMPSENSE0_HIGH_ALARM_MASK, 196f085f672SAnson Huang .high_alarm_shift = IMX7_TEMPSENSE0_HIGH_ALARM_SHIFT, 197f085f672SAnson Huang 198f085f672SAnson Huang .low_alarm_ctrl = IMX7_TEMPSENSE0, 199f085f672SAnson Huang .low_alarm_mask = IMX7_TEMPSENSE0_LOW_ALARM_MASK, 200f085f672SAnson Huang .low_alarm_shift = IMX7_TEMPSENSE0_LOW_ALARM_SHIFT, 2013c94f17eSAnson Huang }; 2023c94f17eSAnson Huang 203ca3de46bSShawn Guo struct imx_thermal_data { 2044d753aa7SViresh Kumar struct cpufreq_policy *policy; 205ca3de46bSShawn Guo struct thermal_zone_device *tz; 206ca3de46bSShawn Guo struct thermal_cooling_device *cdev; 207ca3de46bSShawn Guo enum thermal_device_mode mode; 208ca3de46bSShawn Guo struct regmap *tempmon; 209ae621557SLeonard Crestez u32 c1, c2; /* See formula in imx_init_calib() */ 21017e8351aSSascha Hauer int temp_passive; 21117e8351aSSascha Hauer int temp_critical; 212a2291badSTim Harvey int temp_max; 21317e8351aSSascha Hauer int alarm_temp; 21417e8351aSSascha Hauer int last_temp; 21537713a1eSPhilipp Zabel bool irq_enabled; 21637713a1eSPhilipp Zabel int irq; 217329fe7b1SAnson Huang struct clk *thermal_clk; 2183c94f17eSAnson Huang const struct thermal_soc_data *socdata; 219a2291badSTim Harvey const char *temp_grade; 220ca3de46bSShawn Guo }; 221ca3de46bSShawn Guo 2223c94f17eSAnson Huang static void imx_set_panic_temp(struct imx_thermal_data *data, 22317e8351aSSascha Hauer int panic_temp) 2243c94f17eSAnson Huang { 225f085f672SAnson Huang const struct thermal_soc_data *soc_data = data->socdata; 2263c94f17eSAnson Huang struct regmap *map = data->tempmon; 2273c94f17eSAnson Huang int critical_value; 2283c94f17eSAnson Huang 2293c94f17eSAnson Huang critical_value = (data->c2 - panic_temp) / data->c1; 230f085f672SAnson Huang 231f085f672SAnson Huang regmap_write(map, soc_data->panic_alarm_ctrl + REG_CLR, 232f085f672SAnson Huang soc_data->panic_alarm_mask); 233f085f672SAnson Huang regmap_write(map, soc_data->panic_alarm_ctrl + REG_SET, 234f085f672SAnson Huang critical_value << soc_data->panic_alarm_shift); 2353c94f17eSAnson Huang } 2363c94f17eSAnson Huang 23737713a1eSPhilipp Zabel static void imx_set_alarm_temp(struct imx_thermal_data *data, 23817e8351aSSascha Hauer int alarm_temp) 23937713a1eSPhilipp Zabel { 24037713a1eSPhilipp Zabel struct regmap *map = data->tempmon; 241f085f672SAnson Huang const struct thermal_soc_data *soc_data = data->socdata; 24237713a1eSPhilipp Zabel int alarm_value; 24337713a1eSPhilipp Zabel 24437713a1eSPhilipp Zabel data->alarm_temp = alarm_temp; 245f085f672SAnson Huang 246f085f672SAnson Huang if (data->socdata->version == TEMPMON_IMX7D) 247f085f672SAnson Huang alarm_value = alarm_temp / 1000 + data->c1 - 25; 248f085f672SAnson Huang else 249749e8be7SAnson Huang alarm_value = (data->c2 - alarm_temp) / data->c1; 250f085f672SAnson Huang 251f085f672SAnson Huang regmap_write(map, soc_data->high_alarm_ctrl + REG_CLR, 252f085f672SAnson Huang soc_data->high_alarm_mask); 253f085f672SAnson Huang regmap_write(map, soc_data->high_alarm_ctrl + REG_SET, 254f085f672SAnson Huang alarm_value << soc_data->high_alarm_shift); 25537713a1eSPhilipp Zabel } 25637713a1eSPhilipp Zabel 25717e8351aSSascha Hauer static int imx_get_temp(struct thermal_zone_device *tz, int *temp) 258ca3de46bSShawn Guo { 259ca3de46bSShawn Guo struct imx_thermal_data *data = tz->devdata; 260f085f672SAnson Huang const struct thermal_soc_data *soc_data = data->socdata; 261ca3de46bSShawn Guo struct regmap *map = data->tempmon; 262ca3de46bSShawn Guo unsigned int n_meas; 26337713a1eSPhilipp Zabel bool wait; 264ca3de46bSShawn Guo u32 val; 265ca3de46bSShawn Guo 26637713a1eSPhilipp Zabel if (data->mode == THERMAL_DEVICE_ENABLED) { 26737713a1eSPhilipp Zabel /* Check if a measurement is currently in progress */ 268f085f672SAnson Huang regmap_read(map, soc_data->temp_data, &val); 269f085f672SAnson Huang wait = !(val & soc_data->temp_valid_mask); 27037713a1eSPhilipp Zabel } else { 271ca3de46bSShawn Guo /* 272ca3de46bSShawn Guo * Every time we measure the temperature, we will power on the 273ca3de46bSShawn Guo * temperature sensor, enable measurements, take a reading, 274ca3de46bSShawn Guo * disable measurements, power off the temperature sensor. 275ca3de46bSShawn Guo */ 276f085f672SAnson Huang regmap_write(map, soc_data->sensor_ctrl + REG_CLR, 277f085f672SAnson Huang soc_data->power_down_mask); 278f085f672SAnson Huang regmap_write(map, soc_data->sensor_ctrl + REG_SET, 279f085f672SAnson Huang soc_data->measure_temp_mask); 280ca3de46bSShawn Guo 28137713a1eSPhilipp Zabel wait = true; 28237713a1eSPhilipp Zabel } 28337713a1eSPhilipp Zabel 284ca3de46bSShawn Guo /* 285ca3de46bSShawn Guo * According to the temp sensor designers, it may require up to ~17us 286ca3de46bSShawn Guo * to complete a measurement. 287ca3de46bSShawn Guo */ 28837713a1eSPhilipp Zabel if (wait) 289ca3de46bSShawn Guo usleep_range(20, 50); 290ca3de46bSShawn Guo 291f085f672SAnson Huang regmap_read(map, soc_data->temp_data, &val); 29237713a1eSPhilipp Zabel 29337713a1eSPhilipp Zabel if (data->mode != THERMAL_DEVICE_ENABLED) { 294f085f672SAnson Huang regmap_write(map, soc_data->sensor_ctrl + REG_CLR, 295f085f672SAnson Huang soc_data->measure_temp_mask); 296f085f672SAnson Huang regmap_write(map, soc_data->sensor_ctrl + REG_SET, 297f085f672SAnson Huang soc_data->power_down_mask); 29837713a1eSPhilipp Zabel } 299ca3de46bSShawn Guo 300f085f672SAnson Huang if ((val & soc_data->temp_valid_mask) == 0) { 301ca3de46bSShawn Guo dev_dbg(&tz->device, "temp measurement never finished\n"); 302ca3de46bSShawn Guo return -EAGAIN; 303ca3de46bSShawn Guo } 304ca3de46bSShawn Guo 305f085f672SAnson Huang n_meas = (val & soc_data->temp_value_mask) 306f085f672SAnson Huang >> soc_data->temp_value_shift; 307ca3de46bSShawn Guo 308ae621557SLeonard Crestez /* See imx_init_calib() for formula derivation */ 309f085f672SAnson Huang if (data->socdata->version == TEMPMON_IMX7D) 310f085f672SAnson Huang *temp = (n_meas - data->c1 + 25) * 1000; 311f085f672SAnson Huang else 312749e8be7SAnson Huang *temp = data->c2 - n_meas * data->c1; 313ca3de46bSShawn Guo 3143c94f17eSAnson Huang /* Update alarm value to next higher trip point for TEMPMON_IMX6Q */ 3153c94f17eSAnson Huang if (data->socdata->version == TEMPMON_IMX6Q) { 3163c94f17eSAnson Huang if (data->alarm_temp == data->temp_passive && 3173c94f17eSAnson Huang *temp >= data->temp_passive) 31837713a1eSPhilipp Zabel imx_set_alarm_temp(data, data->temp_critical); 3193c94f17eSAnson Huang if (data->alarm_temp == data->temp_critical && 3203c94f17eSAnson Huang *temp < data->temp_passive) { 32137713a1eSPhilipp Zabel imx_set_alarm_temp(data, data->temp_passive); 32217e8351aSSascha Hauer dev_dbg(&tz->device, "thermal alarm off: T < %d\n", 32337713a1eSPhilipp Zabel data->alarm_temp / 1000); 32437713a1eSPhilipp Zabel } 3253c94f17eSAnson Huang } 32637713a1eSPhilipp Zabel 32737713a1eSPhilipp Zabel if (*temp != data->last_temp) { 32817e8351aSSascha Hauer dev_dbg(&tz->device, "millicelsius: %d\n", *temp); 32937713a1eSPhilipp Zabel data->last_temp = *temp; 33037713a1eSPhilipp Zabel } 33137713a1eSPhilipp Zabel 33237713a1eSPhilipp Zabel /* Reenable alarm IRQ if temperature below alarm temperature */ 33337713a1eSPhilipp Zabel if (!data->irq_enabled && *temp < data->alarm_temp) { 33437713a1eSPhilipp Zabel data->irq_enabled = true; 33537713a1eSPhilipp Zabel enable_irq(data->irq); 336ca3de46bSShawn Guo } 337ca3de46bSShawn Guo 338ca3de46bSShawn Guo return 0; 339ca3de46bSShawn Guo } 340ca3de46bSShawn Guo 341ca3de46bSShawn Guo static int imx_get_mode(struct thermal_zone_device *tz, 342ca3de46bSShawn Guo enum thermal_device_mode *mode) 343ca3de46bSShawn Guo { 344ca3de46bSShawn Guo struct imx_thermal_data *data = tz->devdata; 345ca3de46bSShawn Guo 346ca3de46bSShawn Guo *mode = data->mode; 347ca3de46bSShawn Guo 348ca3de46bSShawn Guo return 0; 349ca3de46bSShawn Guo } 350ca3de46bSShawn Guo 351ca3de46bSShawn Guo static int imx_set_mode(struct thermal_zone_device *tz, 352ca3de46bSShawn Guo enum thermal_device_mode mode) 353ca3de46bSShawn Guo { 354ca3de46bSShawn Guo struct imx_thermal_data *data = tz->devdata; 35537713a1eSPhilipp Zabel struct regmap *map = data->tempmon; 356f085f672SAnson Huang const struct thermal_soc_data *soc_data = data->socdata; 357ca3de46bSShawn Guo 358ca3de46bSShawn Guo if (mode == THERMAL_DEVICE_ENABLED) { 359ca3de46bSShawn Guo tz->polling_delay = IMX_POLLING_DELAY; 360ca3de46bSShawn Guo tz->passive_delay = IMX_PASSIVE_DELAY; 36137713a1eSPhilipp Zabel 362f085f672SAnson Huang regmap_write(map, soc_data->sensor_ctrl + REG_CLR, 363f085f672SAnson Huang soc_data->power_down_mask); 364f085f672SAnson Huang regmap_write(map, soc_data->sensor_ctrl + REG_SET, 365f085f672SAnson Huang soc_data->measure_temp_mask); 36637713a1eSPhilipp Zabel 36737713a1eSPhilipp Zabel if (!data->irq_enabled) { 36837713a1eSPhilipp Zabel data->irq_enabled = true; 36937713a1eSPhilipp Zabel enable_irq(data->irq); 37037713a1eSPhilipp Zabel } 371ca3de46bSShawn Guo } else { 372f085f672SAnson Huang regmap_write(map, soc_data->sensor_ctrl + REG_CLR, 373f085f672SAnson Huang soc_data->measure_temp_mask); 374f085f672SAnson Huang regmap_write(map, soc_data->sensor_ctrl + REG_SET, 375f085f672SAnson Huang soc_data->power_down_mask); 37637713a1eSPhilipp Zabel 377ca3de46bSShawn Guo tz->polling_delay = 0; 378ca3de46bSShawn Guo tz->passive_delay = 0; 37937713a1eSPhilipp Zabel 38037713a1eSPhilipp Zabel if (data->irq_enabled) { 38137713a1eSPhilipp Zabel disable_irq(data->irq); 38237713a1eSPhilipp Zabel data->irq_enabled = false; 38337713a1eSPhilipp Zabel } 384ca3de46bSShawn Guo } 385ca3de46bSShawn Guo 386ca3de46bSShawn Guo data->mode = mode; 3870e70f466SSrinivas Pandruvada thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); 388ca3de46bSShawn Guo 389ca3de46bSShawn Guo return 0; 390ca3de46bSShawn Guo } 391ca3de46bSShawn Guo 392ca3de46bSShawn Guo static int imx_get_trip_type(struct thermal_zone_device *tz, int trip, 393ca3de46bSShawn Guo enum thermal_trip_type *type) 394ca3de46bSShawn Guo { 395ca3de46bSShawn Guo *type = (trip == IMX_TRIP_PASSIVE) ? THERMAL_TRIP_PASSIVE : 396ca3de46bSShawn Guo THERMAL_TRIP_CRITICAL; 397ca3de46bSShawn Guo return 0; 398ca3de46bSShawn Guo } 399ca3de46bSShawn Guo 40017e8351aSSascha Hauer static int imx_get_crit_temp(struct thermal_zone_device *tz, int *temp) 401ca3de46bSShawn Guo { 402017e5142SPhilipp Zabel struct imx_thermal_data *data = tz->devdata; 403017e5142SPhilipp Zabel 404017e5142SPhilipp Zabel *temp = data->temp_critical; 405ca3de46bSShawn Guo return 0; 406ca3de46bSShawn Guo } 407ca3de46bSShawn Guo 408ca3de46bSShawn Guo static int imx_get_trip_temp(struct thermal_zone_device *tz, int trip, 40917e8351aSSascha Hauer int *temp) 410ca3de46bSShawn Guo { 411017e5142SPhilipp Zabel struct imx_thermal_data *data = tz->devdata; 412017e5142SPhilipp Zabel 413017e5142SPhilipp Zabel *temp = (trip == IMX_TRIP_PASSIVE) ? data->temp_passive : 414017e5142SPhilipp Zabel data->temp_critical; 415017e5142SPhilipp Zabel return 0; 416017e5142SPhilipp Zabel } 417017e5142SPhilipp Zabel 418017e5142SPhilipp Zabel static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip, 41917e8351aSSascha Hauer int temp) 420017e5142SPhilipp Zabel { 421017e5142SPhilipp Zabel struct imx_thermal_data *data = tz->devdata; 422017e5142SPhilipp Zabel 423a2291badSTim Harvey /* do not allow changing critical threshold */ 424017e5142SPhilipp Zabel if (trip == IMX_TRIP_CRITICAL) 425017e5142SPhilipp Zabel return -EPERM; 426017e5142SPhilipp Zabel 427a2291badSTim Harvey /* do not allow passive to be set higher than critical */ 428a2291badSTim Harvey if (temp < 0 || temp > data->temp_critical) 429017e5142SPhilipp Zabel return -EINVAL; 430017e5142SPhilipp Zabel 431017e5142SPhilipp Zabel data->temp_passive = temp; 432017e5142SPhilipp Zabel 43337713a1eSPhilipp Zabel imx_set_alarm_temp(data, temp); 43437713a1eSPhilipp Zabel 435ca3de46bSShawn Guo return 0; 436ca3de46bSShawn Guo } 437ca3de46bSShawn Guo 438ca3de46bSShawn Guo static int imx_bind(struct thermal_zone_device *tz, 439ca3de46bSShawn Guo struct thermal_cooling_device *cdev) 440ca3de46bSShawn Guo { 441ca3de46bSShawn Guo int ret; 442ca3de46bSShawn Guo 443ca3de46bSShawn Guo ret = thermal_zone_bind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev, 444ca3de46bSShawn Guo THERMAL_NO_LIMIT, 4456cd9e9f6SKapileshwar Singh THERMAL_NO_LIMIT, 4466cd9e9f6SKapileshwar Singh THERMAL_WEIGHT_DEFAULT); 447ca3de46bSShawn Guo if (ret) { 448ca3de46bSShawn Guo dev_err(&tz->device, 449ca3de46bSShawn Guo "binding zone %s with cdev %s failed:%d\n", 450ca3de46bSShawn Guo tz->type, cdev->type, ret); 451ca3de46bSShawn Guo return ret; 452ca3de46bSShawn Guo } 453ca3de46bSShawn Guo 454ca3de46bSShawn Guo return 0; 455ca3de46bSShawn Guo } 456ca3de46bSShawn Guo 457ca3de46bSShawn Guo static int imx_unbind(struct thermal_zone_device *tz, 458ca3de46bSShawn Guo struct thermal_cooling_device *cdev) 459ca3de46bSShawn Guo { 460ca3de46bSShawn Guo int ret; 461ca3de46bSShawn Guo 462ca3de46bSShawn Guo ret = thermal_zone_unbind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev); 463ca3de46bSShawn Guo if (ret) { 464ca3de46bSShawn Guo dev_err(&tz->device, 465ca3de46bSShawn Guo "unbinding zone %s with cdev %s failed:%d\n", 466ca3de46bSShawn Guo tz->type, cdev->type, ret); 467ca3de46bSShawn Guo return ret; 468ca3de46bSShawn Guo } 469ca3de46bSShawn Guo 470ca3de46bSShawn Guo return 0; 471ca3de46bSShawn Guo } 472ca3de46bSShawn Guo 473cbb07bb3SEduardo Valentin static struct thermal_zone_device_ops imx_tz_ops = { 474ca3de46bSShawn Guo .bind = imx_bind, 475ca3de46bSShawn Guo .unbind = imx_unbind, 476ca3de46bSShawn Guo .get_temp = imx_get_temp, 477ca3de46bSShawn Guo .get_mode = imx_get_mode, 478ca3de46bSShawn Guo .set_mode = imx_set_mode, 479ca3de46bSShawn Guo .get_trip_type = imx_get_trip_type, 480ca3de46bSShawn Guo .get_trip_temp = imx_get_trip_temp, 481ca3de46bSShawn Guo .get_crit_temp = imx_get_crit_temp, 482017e5142SPhilipp Zabel .set_trip_temp = imx_set_trip_temp, 483ca3de46bSShawn Guo }; 484ca3de46bSShawn Guo 485e4bb2240SUwe Kleine-König static int imx_init_calib(struct platform_device *pdev, u32 ocotp_ana1) 486ca3de46bSShawn Guo { 487ca3de46bSShawn Guo struct imx_thermal_data *data = platform_get_drvdata(pdev); 4884e5f61caSUwe Kleine-König int n1; 489749e8be7SAnson Huang u64 temp64; 490ca3de46bSShawn Guo 491e4bb2240SUwe Kleine-König if (ocotp_ana1 == 0 || ocotp_ana1 == ~0) { 492ca3de46bSShawn Guo dev_err(&pdev->dev, "invalid sensor calibration data\n"); 493ca3de46bSShawn Guo return -EINVAL; 494ca3de46bSShawn Guo } 495ca3de46bSShawn Guo 496ca3de46bSShawn Guo /* 497f085f672SAnson Huang * On i.MX7D, we only use the calibration data at 25C to get the temp, 498f085f672SAnson Huang * Tmeas = ( Nmeas - n1) + 25; n1 is the fuse value for 25C. 499f085f672SAnson Huang */ 500f085f672SAnson Huang if (data->socdata->version == TEMPMON_IMX7D) { 501f085f672SAnson Huang data->c1 = (ocotp_ana1 >> 9) & 0x1ff; 502f085f672SAnson Huang return 0; 503f085f672SAnson Huang } 504f085f672SAnson Huang 505f085f672SAnson Huang /* 506c5bbdb4bSUwe Kleine-König * The sensor is calibrated at 25 °C (aka T1) and the value measured 507c5bbdb4bSUwe Kleine-König * (aka N1) at this temperature is provided in bits [31:20] in the 508c5bbdb4bSUwe Kleine-König * i.MX's OCOTP value ANA1. 509c5bbdb4bSUwe Kleine-König * To find the actual temperature T, the following formula has to be used 510c5bbdb4bSUwe Kleine-König * when reading value n from the sensor: 511c5bbdb4bSUwe Kleine-König * 5124e5f61caSUwe Kleine-König * T = T1 + (N - N1) / (0.4148468 - 0.0015423 * N1) °C + 3.580661 °C 5134e5f61caSUwe Kleine-König * = [T1' - N1 / (0.4148468 - 0.0015423 * N1) °C] + N / (0.4148468 - 0.0015423 * N1) °C 5144e5f61caSUwe Kleine-König * = [T1' + N1 / (0.0015423 * N1 - 0.4148468) °C] - N / (0.0015423 * N1 - 0.4148468) °C 515c5bbdb4bSUwe Kleine-König * = c2 - c1 * N 516c5bbdb4bSUwe Kleine-König * 517c5bbdb4bSUwe Kleine-König * with 518c5bbdb4bSUwe Kleine-König * 5194e5f61caSUwe Kleine-König * T1' = 28.580661 °C 5204e5f61caSUwe Kleine-König * c1 = 1 / (0.0015423 * N1 - 0.4297157) °C 5214e5f61caSUwe Kleine-König * c2 = T1' + N1 / (0.0015423 * N1 - 0.4148468) °C 5224e5f61caSUwe Kleine-König * = T1' + N1 * c1 523ca3de46bSShawn Guo */ 524e4bb2240SUwe Kleine-König n1 = ocotp_ana1 >> 20; 525ca3de46bSShawn Guo 5264e5f61caSUwe Kleine-König temp64 = 10000000; /* use 10^7 as fixed point constant for values in formula */ 527c5bbdb4bSUwe Kleine-König temp64 *= 1000; /* to get result in °mC */ 5284e5f61caSUwe Kleine-König do_div(temp64, 15423 * n1 - 4148468); 529749e8be7SAnson Huang data->c1 = temp64; 5304e5f61caSUwe Kleine-König data->c2 = n1 * data->c1 + 28581; 531ca3de46bSShawn Guo 532ae621557SLeonard Crestez return 0; 533a2291badSTim Harvey } 534a2291badSTim Harvey 535e4bb2240SUwe Kleine-König static void imx_init_temp_grade(struct platform_device *pdev, u32 ocotp_mem0) 536ae621557SLeonard Crestez { 537ae621557SLeonard Crestez struct imx_thermal_data *data = platform_get_drvdata(pdev); 538ae621557SLeonard Crestez 539a2291badSTim Harvey /* The maximum die temp is specified by the Temperature Grade */ 540e4bb2240SUwe Kleine-König switch ((ocotp_mem0 >> 6) & 0x3) { 541339d7492SUwe Kleine-König case 0: /* Commercial (0 to 95 °C) */ 542a2291badSTim Harvey data->temp_grade = "Commercial"; 543a2291badSTim Harvey data->temp_max = 95000; 544a2291badSTim Harvey break; 545339d7492SUwe Kleine-König case 1: /* Extended Commercial (-20 °C to 105 °C) */ 546a2291badSTim Harvey data->temp_grade = "Extended Commercial"; 547a2291badSTim Harvey data->temp_max = 105000; 548a2291badSTim Harvey break; 549339d7492SUwe Kleine-König case 2: /* Industrial (-40 °C to 105 °C) */ 550a2291badSTim Harvey data->temp_grade = "Industrial"; 551a2291badSTim Harvey data->temp_max = 105000; 552a2291badSTim Harvey break; 553339d7492SUwe Kleine-König case 3: /* Automotive (-40 °C to 125 °C) */ 554a2291badSTim Harvey data->temp_grade = "Automotive"; 555a2291badSTim Harvey data->temp_max = 125000; 556a2291badSTim Harvey break; 557a2291badSTim Harvey } 558017e5142SPhilipp Zabel 559017e5142SPhilipp Zabel /* 560339d7492SUwe Kleine-König * Set the critical trip point at 5 °C under max 561339d7492SUwe Kleine-König * Set the passive trip point at 10 °C under max (changeable via sysfs) 562017e5142SPhilipp Zabel */ 563a2291badSTim Harvey data->temp_critical = data->temp_max - (1000 * 5); 564a2291badSTim Harvey data->temp_passive = data->temp_max - (1000 * 10); 565ae621557SLeonard Crestez } 566ae621557SLeonard Crestez 567ae621557SLeonard Crestez static int imx_init_from_tempmon_data(struct platform_device *pdev) 568ae621557SLeonard Crestez { 569ae621557SLeonard Crestez struct regmap *map; 570ae621557SLeonard Crestez int ret; 571ae621557SLeonard Crestez u32 val; 572ae621557SLeonard Crestez 573ae621557SLeonard Crestez map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 574ae621557SLeonard Crestez "fsl,tempmon-data"); 575ae621557SLeonard Crestez if (IS_ERR(map)) { 576ae621557SLeonard Crestez ret = PTR_ERR(map); 577ae621557SLeonard Crestez dev_err(&pdev->dev, "failed to get sensor regmap: %d\n", ret); 578ae621557SLeonard Crestez return ret; 579ae621557SLeonard Crestez } 580ae621557SLeonard Crestez 581ae621557SLeonard Crestez ret = regmap_read(map, OCOTP_ANA1, &val); 582ae621557SLeonard Crestez if (ret) { 583ae621557SLeonard Crestez dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret); 584ae621557SLeonard Crestez return ret; 585ae621557SLeonard Crestez } 586ae621557SLeonard Crestez ret = imx_init_calib(pdev, val); 587ae621557SLeonard Crestez if (ret) 588ae621557SLeonard Crestez return ret; 589ae621557SLeonard Crestez 590ae621557SLeonard Crestez ret = regmap_read(map, OCOTP_MEM0, &val); 591ae621557SLeonard Crestez if (ret) { 592ae621557SLeonard Crestez dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret); 593ae621557SLeonard Crestez return ret; 594ae621557SLeonard Crestez } 595ae621557SLeonard Crestez imx_init_temp_grade(pdev, val); 596ae621557SLeonard Crestez 597ae621557SLeonard Crestez return 0; 598ae621557SLeonard Crestez } 599ae621557SLeonard Crestez 600ae621557SLeonard Crestez static int imx_init_from_nvmem_cells(struct platform_device *pdev) 601ae621557SLeonard Crestez { 602ae621557SLeonard Crestez int ret; 603ae621557SLeonard Crestez u32 val; 604ae621557SLeonard Crestez 605ae621557SLeonard Crestez ret = nvmem_cell_read_u32(&pdev->dev, "calib", &val); 606ae621557SLeonard Crestez if (ret) 607ae621557SLeonard Crestez return ret; 608be926ceeSJean-Christophe Dubois 609be926ceeSJean-Christophe Dubois ret = imx_init_calib(pdev, val); 610be926ceeSJean-Christophe Dubois if (ret) 611be926ceeSJean-Christophe Dubois return ret; 612ae621557SLeonard Crestez 613ae621557SLeonard Crestez ret = nvmem_cell_read_u32(&pdev->dev, "temp_grade", &val); 614ae621557SLeonard Crestez if (ret) 615ae621557SLeonard Crestez return ret; 616ae621557SLeonard Crestez imx_init_temp_grade(pdev, val); 617017e5142SPhilipp Zabel 618ca3de46bSShawn Guo return 0; 619ca3de46bSShawn Guo } 620ca3de46bSShawn Guo 62137713a1eSPhilipp Zabel static irqreturn_t imx_thermal_alarm_irq(int irq, void *dev) 62237713a1eSPhilipp Zabel { 62337713a1eSPhilipp Zabel struct imx_thermal_data *data = dev; 62437713a1eSPhilipp Zabel 62537713a1eSPhilipp Zabel disable_irq_nosync(irq); 62637713a1eSPhilipp Zabel data->irq_enabled = false; 62737713a1eSPhilipp Zabel 62837713a1eSPhilipp Zabel return IRQ_WAKE_THREAD; 62937713a1eSPhilipp Zabel } 63037713a1eSPhilipp Zabel 63137713a1eSPhilipp Zabel static irqreturn_t imx_thermal_alarm_irq_thread(int irq, void *dev) 63237713a1eSPhilipp Zabel { 63337713a1eSPhilipp Zabel struct imx_thermal_data *data = dev; 63437713a1eSPhilipp Zabel 63517e8351aSSascha Hauer dev_dbg(&data->tz->device, "THERMAL ALARM: T > %d\n", 63637713a1eSPhilipp Zabel data->alarm_temp / 1000); 63737713a1eSPhilipp Zabel 6380e70f466SSrinivas Pandruvada thermal_zone_device_update(data->tz, THERMAL_EVENT_UNSPECIFIED); 63937713a1eSPhilipp Zabel 64037713a1eSPhilipp Zabel return IRQ_HANDLED; 64137713a1eSPhilipp Zabel } 64237713a1eSPhilipp Zabel 6433c94f17eSAnson Huang static const struct of_device_id of_imx_thermal_match[] = { 6443c94f17eSAnson Huang { .compatible = "fsl,imx6q-tempmon", .data = &thermal_imx6q_data, }, 6453c94f17eSAnson Huang { .compatible = "fsl,imx6sx-tempmon", .data = &thermal_imx6sx_data, }, 646f085f672SAnson Huang { .compatible = "fsl,imx7d-tempmon", .data = &thermal_imx7d_data, }, 6473c94f17eSAnson Huang { /* end */ } 6483c94f17eSAnson Huang }; 6493c94f17eSAnson Huang MODULE_DEVICE_TABLE(of, of_imx_thermal_match); 6503c94f17eSAnson Huang 651c589c566SAnson Huang #ifdef CONFIG_CPU_FREQ 652a1d00154SBastian Stender /* 653a1d00154SBastian Stender * Create cooling device in case no #cooling-cells property is available in 654a1d00154SBastian Stender * CPU node 655a1d00154SBastian Stender */ 656a1d00154SBastian Stender static int imx_thermal_register_legacy_cooling(struct imx_thermal_data *data) 657a1d00154SBastian Stender { 658c589c566SAnson Huang struct device_node *np; 659a1d00154SBastian Stender int ret; 660a1d00154SBastian Stender 661c589c566SAnson Huang data->policy = cpufreq_cpu_get(0); 662c589c566SAnson Huang if (!data->policy) { 663c589c566SAnson Huang pr_debug("%s: CPUFreq policy not found\n", __func__); 664c589c566SAnson Huang return -EPROBE_DEFER; 665c589c566SAnson Huang } 666c589c566SAnson Huang 667c589c566SAnson Huang np = of_get_cpu_node(data->policy->cpu, NULL); 668c589c566SAnson Huang 669a1d00154SBastian Stender if (!np || !of_find_property(np, "#cooling-cells", NULL)) { 670a1d00154SBastian Stender data->cdev = cpufreq_cooling_register(data->policy); 671a1d00154SBastian Stender if (IS_ERR(data->cdev)) { 672a1d00154SBastian Stender ret = PTR_ERR(data->cdev); 673a1d00154SBastian Stender cpufreq_cpu_put(data->policy); 674a1d00154SBastian Stender return ret; 675a1d00154SBastian Stender } 676a1d00154SBastian Stender } 677a1d00154SBastian Stender 678a1d00154SBastian Stender return 0; 679a1d00154SBastian Stender } 680a1d00154SBastian Stender 681c589c566SAnson Huang static void imx_thermal_unregister_legacy_cooling(struct imx_thermal_data *data) 682c589c566SAnson Huang { 683c589c566SAnson Huang cpufreq_cooling_unregister(data->cdev); 684c589c566SAnson Huang cpufreq_cpu_put(data->policy); 685c589c566SAnson Huang } 686c589c566SAnson Huang 687c589c566SAnson Huang #else 688c589c566SAnson Huang 689c589c566SAnson Huang static inline int imx_thermal_register_legacy_cooling(struct imx_thermal_data *data) 690c589c566SAnson Huang { 691c589c566SAnson Huang return 0; 692c589c566SAnson Huang } 693c589c566SAnson Huang 694c589c566SAnson Huang static inline void imx_thermal_unregister_legacy_cooling(struct imx_thermal_data *data) 695c589c566SAnson Huang { 696c589c566SAnson Huang } 697c589c566SAnson Huang #endif 698c589c566SAnson Huang 699ca3de46bSShawn Guo static int imx_thermal_probe(struct platform_device *pdev) 700ca3de46bSShawn Guo { 701ca3de46bSShawn Guo struct imx_thermal_data *data; 702ca3de46bSShawn Guo struct regmap *map; 70337713a1eSPhilipp Zabel int measure_freq; 704ca3de46bSShawn Guo int ret; 705ca3de46bSShawn Guo 706ca3de46bSShawn Guo data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 707ca3de46bSShawn Guo if (!data) 708ca3de46bSShawn Guo return -ENOMEM; 709ca3de46bSShawn Guo 710ca3de46bSShawn Guo map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "fsl,tempmon"); 711ca3de46bSShawn Guo if (IS_ERR(map)) { 712ca3de46bSShawn Guo ret = PTR_ERR(map); 713ca3de46bSShawn Guo dev_err(&pdev->dev, "failed to get tempmon regmap: %d\n", ret); 714ca3de46bSShawn Guo return ret; 715ca3de46bSShawn Guo } 716ca3de46bSShawn Guo data->tempmon = map; 717ca3de46bSShawn Guo 718829bc78aSCorentin LABBE data->socdata = of_device_get_match_data(&pdev->dev); 7198b051ec3SShailendra Verma if (!data->socdata) { 7208b051ec3SShailendra Verma dev_err(&pdev->dev, "no device match found\n"); 7218b051ec3SShailendra Verma return -ENODEV; 7228b051ec3SShailendra Verma } 7233c94f17eSAnson Huang 7243c94f17eSAnson Huang /* make sure the IRQ flag is clear before enabling irq on i.MX6SX */ 7253c94f17eSAnson Huang if (data->socdata->version == TEMPMON_IMX6SX) { 726f085f672SAnson Huang regmap_write(map, IMX6_MISC1 + REG_CLR, 727f085f672SAnson Huang IMX6_MISC1_IRQ_TEMPHIGH | IMX6_MISC1_IRQ_TEMPLOW 728f085f672SAnson Huang | IMX6_MISC1_IRQ_TEMPPANIC); 7293c94f17eSAnson Huang /* 7303c94f17eSAnson Huang * reset value of LOW ALARM is incorrect, set it to lowest 7313c94f17eSAnson Huang * value to avoid false trigger of low alarm. 7323c94f17eSAnson Huang */ 733f085f672SAnson Huang regmap_write(map, data->socdata->low_alarm_ctrl + REG_SET, 734f085f672SAnson Huang data->socdata->low_alarm_mask); 7353c94f17eSAnson Huang } 7363c94f17eSAnson Huang 73737713a1eSPhilipp Zabel data->irq = platform_get_irq(pdev, 0); 73837713a1eSPhilipp Zabel if (data->irq < 0) 73937713a1eSPhilipp Zabel return data->irq; 74037713a1eSPhilipp Zabel 741ca3de46bSShawn Guo platform_set_drvdata(pdev, data); 742ca3de46bSShawn Guo 743ae621557SLeonard Crestez if (of_find_property(pdev->dev.of_node, "nvmem-cells", NULL)) { 744ae621557SLeonard Crestez ret = imx_init_from_nvmem_cells(pdev); 745925b3836SAnson Huang if (ret) { 746ae621557SLeonard Crestez if (ret == -EPROBE_DEFER) 747ca3de46bSShawn Guo return ret; 748925b3836SAnson Huang 749ae621557SLeonard Crestez dev_err(&pdev->dev, "failed to init from nvmem: %d\n", 750ae621557SLeonard Crestez ret); 751ae621557SLeonard Crestez return ret; 752ae621557SLeonard Crestez } 753ae621557SLeonard Crestez } else { 754ae621557SLeonard Crestez ret = imx_init_from_tempmon_data(pdev); 755ae621557SLeonard Crestez if (ret) { 756337a4aecSAnson Huang dev_err(&pdev->dev, "failed to init from fsl,tempmon-data\n"); 757ae621557SLeonard Crestez return ret; 758ae621557SLeonard Crestez } 759ca3de46bSShawn Guo } 760ca3de46bSShawn Guo 761ca3de46bSShawn Guo /* Make sure sensor is in known good state for measurements */ 762f085f672SAnson Huang regmap_write(map, data->socdata->sensor_ctrl + REG_CLR, 763f085f672SAnson Huang data->socdata->power_down_mask); 764f085f672SAnson Huang regmap_write(map, data->socdata->sensor_ctrl + REG_CLR, 765f085f672SAnson Huang data->socdata->measure_temp_mask); 766f085f672SAnson Huang regmap_write(map, data->socdata->measure_freq_ctrl + REG_CLR, 767f085f672SAnson Huang data->socdata->measure_freq_mask); 768f085f672SAnson Huang if (data->socdata->version != TEMPMON_IMX7D) 769f085f672SAnson Huang regmap_write(map, IMX6_MISC0 + REG_SET, 770f085f672SAnson Huang IMX6_MISC0_REFTOP_SELBIASOFF); 771f085f672SAnson Huang regmap_write(map, data->socdata->sensor_ctrl + REG_SET, 772f085f672SAnson Huang data->socdata->power_down_mask); 773ca3de46bSShawn Guo 774a1d00154SBastian Stender ret = imx_thermal_register_legacy_cooling(data); 775a1d00154SBastian Stender if (ret) { 776c589c566SAnson Huang if (ret == -EPROBE_DEFER) 777c589c566SAnson Huang return ret; 778c589c566SAnson Huang 779ca3de46bSShawn Guo dev_err(&pdev->dev, 7804d753aa7SViresh Kumar "failed to register cpufreq cooling device: %d\n", ret); 781ca3de46bSShawn Guo return ret; 782ca3de46bSShawn Guo } 783ca3de46bSShawn Guo 78490a21ff5SHeiner Kallweit data->thermal_clk = devm_clk_get(&pdev->dev, NULL); 78590a21ff5SHeiner Kallweit if (IS_ERR(data->thermal_clk)) { 78690a21ff5SHeiner Kallweit ret = PTR_ERR(data->thermal_clk); 78790a21ff5SHeiner Kallweit if (ret != -EPROBE_DEFER) 78890a21ff5SHeiner Kallweit dev_err(&pdev->dev, 78990a21ff5SHeiner Kallweit "failed to get thermal clk: %d\n", ret); 790c589c566SAnson Huang goto legacy_cleanup; 79190a21ff5SHeiner Kallweit } 79290a21ff5SHeiner Kallweit 79390a21ff5SHeiner Kallweit /* 79490a21ff5SHeiner Kallweit * Thermal sensor needs clk on to get correct value, normally 79590a21ff5SHeiner Kallweit * we should enable its clk before taking measurement and disable 79690a21ff5SHeiner Kallweit * clk after measurement is done, but if alarm function is enabled, 79790a21ff5SHeiner Kallweit * hardware will auto measure the temperature periodically, so we 79890a21ff5SHeiner Kallweit * need to keep the clk always on for alarm function. 79990a21ff5SHeiner Kallweit */ 80090a21ff5SHeiner Kallweit ret = clk_prepare_enable(data->thermal_clk); 80190a21ff5SHeiner Kallweit if (ret) { 80290a21ff5SHeiner Kallweit dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret); 803c589c566SAnson Huang goto legacy_cleanup; 80490a21ff5SHeiner Kallweit } 80590a21ff5SHeiner Kallweit 806ca3de46bSShawn Guo data->tz = thermal_zone_device_register("imx_thermal_zone", 807017e5142SPhilipp Zabel IMX_TRIP_NUM, 808017e5142SPhilipp Zabel BIT(IMX_TRIP_PASSIVE), data, 809ca3de46bSShawn Guo &imx_tz_ops, NULL, 810ca3de46bSShawn Guo IMX_PASSIVE_DELAY, 811ca3de46bSShawn Guo IMX_POLLING_DELAY); 812ca3de46bSShawn Guo if (IS_ERR(data->tz)) { 813ca3de46bSShawn Guo ret = PTR_ERR(data->tz); 814ca3de46bSShawn Guo dev_err(&pdev->dev, 815ca3de46bSShawn Guo "failed to register thermal zone device %d\n", ret); 816b6ad3981SAnson Huang goto clk_disable; 817ca3de46bSShawn Guo } 818ca3de46bSShawn Guo 819a2291badSTim Harvey dev_info(&pdev->dev, "%s CPU temperature grade - max:%dC" 820a2291badSTim Harvey " critical:%dC passive:%dC\n", data->temp_grade, 821a2291badSTim Harvey data->temp_max / 1000, data->temp_critical / 1000, 822a2291badSTim Harvey data->temp_passive / 1000); 823a2291badSTim Harvey 82437713a1eSPhilipp Zabel /* Enable measurements at ~ 10 Hz */ 825f085f672SAnson Huang regmap_write(map, data->socdata->measure_freq_ctrl + REG_CLR, 826f085f672SAnson Huang data->socdata->measure_freq_mask); 82737713a1eSPhilipp Zabel measure_freq = DIV_ROUND_UP(32768, 10); /* 10 Hz */ 828f085f672SAnson Huang regmap_write(map, data->socdata->measure_freq_ctrl + REG_SET, 829f085f672SAnson Huang measure_freq << data->socdata->measure_freq_shift); 83037713a1eSPhilipp Zabel imx_set_alarm_temp(data, data->temp_passive); 8313c94f17eSAnson Huang 8323c94f17eSAnson Huang if (data->socdata->version == TEMPMON_IMX6SX) 8333c94f17eSAnson Huang imx_set_panic_temp(data, data->temp_critical); 8343c94f17eSAnson Huang 835f085f672SAnson Huang regmap_write(map, data->socdata->sensor_ctrl + REG_CLR, 836f085f672SAnson Huang data->socdata->power_down_mask); 837f085f672SAnson Huang regmap_write(map, data->socdata->sensor_ctrl + REG_SET, 838f085f672SAnson Huang data->socdata->measure_temp_mask); 83937713a1eSPhilipp Zabel 840cf1ba1d7SMikhail Lappo data->irq_enabled = true; 841cf1ba1d7SMikhail Lappo data->mode = THERMAL_DEVICE_ENABLED; 842cf1ba1d7SMikhail Lappo 84384866ee5SBai Ping ret = devm_request_threaded_irq(&pdev->dev, data->irq, 84484866ee5SBai Ping imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread, 84584866ee5SBai Ping 0, "imx_thermal", data); 84684866ee5SBai Ping if (ret < 0) { 84784866ee5SBai Ping dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret); 848b6ad3981SAnson Huang goto thermal_zone_unregister; 84984866ee5SBai Ping } 85084866ee5SBai Ping 851ca3de46bSShawn Guo return 0; 852b6ad3981SAnson Huang 853b6ad3981SAnson Huang thermal_zone_unregister: 854b6ad3981SAnson Huang thermal_zone_device_unregister(data->tz); 855b6ad3981SAnson Huang clk_disable: 856b6ad3981SAnson Huang clk_disable_unprepare(data->thermal_clk); 857c589c566SAnson Huang legacy_cleanup: 858c589c566SAnson Huang imx_thermal_unregister_legacy_cooling(data); 859b6ad3981SAnson Huang 860b6ad3981SAnson Huang return ret; 861ca3de46bSShawn Guo } 862ca3de46bSShawn Guo 863ca3de46bSShawn Guo static int imx_thermal_remove(struct platform_device *pdev) 864ca3de46bSShawn Guo { 865ca3de46bSShawn Guo struct imx_thermal_data *data = platform_get_drvdata(pdev); 86637713a1eSPhilipp Zabel struct regmap *map = data->tempmon; 86737713a1eSPhilipp Zabel 86837713a1eSPhilipp Zabel /* Disable measurements */ 869f085f672SAnson Huang regmap_write(map, data->socdata->sensor_ctrl + REG_SET, 870f085f672SAnson Huang data->socdata->power_down_mask); 871329fe7b1SAnson Huang if (!IS_ERR(data->thermal_clk)) 872329fe7b1SAnson Huang clk_disable_unprepare(data->thermal_clk); 873ca3de46bSShawn Guo 874ca3de46bSShawn Guo thermal_zone_device_unregister(data->tz); 875ca3de46bSShawn Guo cpufreq_cooling_unregister(data->cdev); 8764d753aa7SViresh Kumar cpufreq_cpu_put(data->policy); 877ca3de46bSShawn Guo 878ca3de46bSShawn Guo return 0; 879ca3de46bSShawn Guo } 880ca3de46bSShawn Guo 881b009514fSAnson Huang static int __maybe_unused imx_thermal_suspend(struct device *dev) 882ca3de46bSShawn Guo { 883ca3de46bSShawn Guo struct imx_thermal_data *data = dev_get_drvdata(dev); 884ca3de46bSShawn Guo struct regmap *map = data->tempmon; 885ca3de46bSShawn Guo 886ca3de46bSShawn Guo /* 887b46cce59SAnson Huang * Need to disable thermal sensor, otherwise, when thermal core 888b46cce59SAnson Huang * try to get temperature before thermal sensor resume, a wrong 889b46cce59SAnson Huang * temperature will be read as the thermal sensor is powered 890b46cce59SAnson Huang * down. 891ca3de46bSShawn Guo */ 892f085f672SAnson Huang regmap_write(map, data->socdata->sensor_ctrl + REG_CLR, 893f085f672SAnson Huang data->socdata->measure_temp_mask); 894f085f672SAnson Huang regmap_write(map, data->socdata->sensor_ctrl + REG_SET, 895f085f672SAnson Huang data->socdata->power_down_mask); 896b46cce59SAnson Huang data->mode = THERMAL_DEVICE_DISABLED; 897d26eef8bSAnson Huang clk_disable_unprepare(data->thermal_clk); 898ca3de46bSShawn Guo 899ca3de46bSShawn Guo return 0; 900ca3de46bSShawn Guo } 901ca3de46bSShawn Guo 902b009514fSAnson Huang static int __maybe_unused imx_thermal_resume(struct device *dev) 903ca3de46bSShawn Guo { 904b46cce59SAnson Huang struct imx_thermal_data *data = dev_get_drvdata(dev); 905b46cce59SAnson Huang struct regmap *map = data->tempmon; 906e3bdc8d7SArvind Yadav int ret; 907b46cce59SAnson Huang 908e3bdc8d7SArvind Yadav ret = clk_prepare_enable(data->thermal_clk); 909e3bdc8d7SArvind Yadav if (ret) 910e3bdc8d7SArvind Yadav return ret; 911b46cce59SAnson Huang /* Enabled thermal sensor after resume */ 912f085f672SAnson Huang regmap_write(map, data->socdata->sensor_ctrl + REG_CLR, 913f085f672SAnson Huang data->socdata->power_down_mask); 914f085f672SAnson Huang regmap_write(map, data->socdata->sensor_ctrl + REG_SET, 915f085f672SAnson Huang data->socdata->measure_temp_mask); 916b46cce59SAnson Huang data->mode = THERMAL_DEVICE_ENABLED; 917b46cce59SAnson Huang 918ca3de46bSShawn Guo return 0; 919ca3de46bSShawn Guo } 920ca3de46bSShawn Guo 921ca3de46bSShawn Guo static SIMPLE_DEV_PM_OPS(imx_thermal_pm_ops, 922ca3de46bSShawn Guo imx_thermal_suspend, imx_thermal_resume); 923ca3de46bSShawn Guo 924ca3de46bSShawn Guo static struct platform_driver imx_thermal = { 925ca3de46bSShawn Guo .driver = { 926ca3de46bSShawn Guo .name = "imx_thermal", 927ca3de46bSShawn Guo .pm = &imx_thermal_pm_ops, 928ca3de46bSShawn Guo .of_match_table = of_imx_thermal_match, 929ca3de46bSShawn Guo }, 930ca3de46bSShawn Guo .probe = imx_thermal_probe, 931ca3de46bSShawn Guo .remove = imx_thermal_remove, 932ca3de46bSShawn Guo }; 933ca3de46bSShawn Guo module_platform_driver(imx_thermal); 934ca3de46bSShawn Guo 935ca3de46bSShawn Guo MODULE_AUTHOR("Freescale Semiconductor, Inc."); 936ca3de46bSShawn Guo MODULE_DESCRIPTION("Thermal driver for Freescale i.MX SoCs"); 937ca3de46bSShawn Guo MODULE_LICENSE("GPL v2"); 938ca3de46bSShawn Guo MODULE_ALIAS("platform:imx-thermal"); 939