1cbac8f63SCaesar Wang /* 2cbac8f63SCaesar Wang * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd 3cbac8f63SCaesar Wang * 4cbac8f63SCaesar Wang * This program is free software; you can redistribute it and/or modify it 5cbac8f63SCaesar Wang * under the terms and conditions of the GNU General Public License, 6cbac8f63SCaesar Wang * version 2, as published by the Free Software Foundation. 7cbac8f63SCaesar Wang * 8cbac8f63SCaesar Wang * This program is distributed in the hope it will be useful, but WITHOUT 9cbac8f63SCaesar Wang * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10cbac8f63SCaesar Wang * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11cbac8f63SCaesar Wang * more details. 12cbac8f63SCaesar Wang */ 13cbac8f63SCaesar Wang 14cbac8f63SCaesar Wang #include <linux/clk.h> 15cbac8f63SCaesar Wang #include <linux/delay.h> 16cbac8f63SCaesar Wang #include <linux/interrupt.h> 17cbac8f63SCaesar Wang #include <linux/io.h> 18cbac8f63SCaesar Wang #include <linux/module.h> 19cbac8f63SCaesar Wang #include <linux/of.h> 20cbac8f63SCaesar Wang #include <linux/of_address.h> 21cbac8f63SCaesar Wang #include <linux/of_irq.h> 22cbac8f63SCaesar Wang #include <linux/platform_device.h> 23cbac8f63SCaesar Wang #include <linux/reset.h> 24cbac8f63SCaesar Wang #include <linux/thermal.h> 25cbac8f63SCaesar Wang 26cbac8f63SCaesar Wang /** 27cbac8f63SCaesar Wang * If the temperature over a period of time High, 28cbac8f63SCaesar Wang * the resulting TSHUT gave CRU module,let it reset the entire chip, 29cbac8f63SCaesar Wang * or via GPIO give PMIC. 30cbac8f63SCaesar Wang */ 31cbac8f63SCaesar Wang enum tshut_mode { 32cbac8f63SCaesar Wang TSHUT_MODE_CRU = 0, 33cbac8f63SCaesar Wang TSHUT_MODE_GPIO, 34cbac8f63SCaesar Wang }; 35cbac8f63SCaesar Wang 36cbac8f63SCaesar Wang /** 37cbac8f63SCaesar Wang * the system Temperature Sensors tshut(tshut) polarity 38cbac8f63SCaesar Wang * the bit 8 is tshut polarity. 39cbac8f63SCaesar Wang * 0: low active, 1: high active 40cbac8f63SCaesar Wang */ 41cbac8f63SCaesar Wang enum tshut_polarity { 42cbac8f63SCaesar Wang TSHUT_LOW_ACTIVE = 0, 43cbac8f63SCaesar Wang TSHUT_HIGH_ACTIVE, 44cbac8f63SCaesar Wang }; 45cbac8f63SCaesar Wang 46cbac8f63SCaesar Wang /** 47cbac8f63SCaesar Wang * The system has three Temperature Sensors. channel 0 is reserved, 48cbac8f63SCaesar Wang * channel 1 is for CPU, and channel 2 is for GPU. 49cbac8f63SCaesar Wang */ 50cbac8f63SCaesar Wang enum sensor_id { 51cbac8f63SCaesar Wang SENSOR_CPU = 1, 52cbac8f63SCaesar Wang SENSOR_GPU, 53cbac8f63SCaesar Wang }; 54cbac8f63SCaesar Wang 55cbac8f63SCaesar Wang struct rockchip_tsadc_chip { 56cbac8f63SCaesar Wang /* The hardware-controlled tshut property */ 57cbac8f63SCaesar Wang long tshut_temp; 58cbac8f63SCaesar Wang enum tshut_mode tshut_mode; 59cbac8f63SCaesar Wang enum tshut_polarity tshut_polarity; 60cbac8f63SCaesar Wang 61cbac8f63SCaesar Wang /* Chip-wide methods */ 62cbac8f63SCaesar Wang void (*initialize)(void __iomem *reg, enum tshut_polarity p); 63cbac8f63SCaesar Wang void (*irq_ack)(void __iomem *reg); 64cbac8f63SCaesar Wang void (*control)(void __iomem *reg, bool on); 65cbac8f63SCaesar Wang 66cbac8f63SCaesar Wang /* Per-sensor methods */ 6717e8351aSSascha Hauer int (*get_temp)(int chn, void __iomem *reg, int *temp); 68cbac8f63SCaesar Wang void (*set_tshut_temp)(int chn, void __iomem *reg, long temp); 69cbac8f63SCaesar Wang void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m); 70cbac8f63SCaesar Wang }; 71cbac8f63SCaesar Wang 72cbac8f63SCaesar Wang struct rockchip_thermal_sensor { 73cbac8f63SCaesar Wang struct rockchip_thermal_data *thermal; 74cbac8f63SCaesar Wang struct thermal_zone_device *tzd; 75cbac8f63SCaesar Wang enum sensor_id id; 76cbac8f63SCaesar Wang }; 77cbac8f63SCaesar Wang 78cbac8f63SCaesar Wang #define NUM_SENSORS 2 /* Ignore unused sensor 0 */ 79cbac8f63SCaesar Wang 80cbac8f63SCaesar Wang struct rockchip_thermal_data { 81cbac8f63SCaesar Wang const struct rockchip_tsadc_chip *chip; 82cbac8f63SCaesar Wang struct platform_device *pdev; 83cbac8f63SCaesar Wang struct reset_control *reset; 84cbac8f63SCaesar Wang 85cbac8f63SCaesar Wang struct rockchip_thermal_sensor sensors[NUM_SENSORS]; 86cbac8f63SCaesar Wang 87cbac8f63SCaesar Wang struct clk *clk; 88cbac8f63SCaesar Wang struct clk *pclk; 89cbac8f63SCaesar Wang 90cbac8f63SCaesar Wang void __iomem *regs; 91cbac8f63SCaesar Wang 92cbac8f63SCaesar Wang long tshut_temp; 93cbac8f63SCaesar Wang enum tshut_mode tshut_mode; 94cbac8f63SCaesar Wang enum tshut_polarity tshut_polarity; 95cbac8f63SCaesar Wang }; 96cbac8f63SCaesar Wang 97cbac8f63SCaesar Wang /* TSADC V2 Sensor info define: */ 98cbac8f63SCaesar Wang #define TSADCV2_AUTO_CON 0x04 99cbac8f63SCaesar Wang #define TSADCV2_INT_EN 0x08 100cbac8f63SCaesar Wang #define TSADCV2_INT_PD 0x0c 101cbac8f63SCaesar Wang #define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04) 102cbac8f63SCaesar Wang #define TSADCV2_COMP_SHUT(chn) (0x40 + (chn) * 0x04) 103cbac8f63SCaesar Wang #define TSADCV2_HIGHT_INT_DEBOUNCE 0x60 104cbac8f63SCaesar Wang #define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64 105cbac8f63SCaesar Wang #define TSADCV2_AUTO_PERIOD 0x68 106cbac8f63SCaesar Wang #define TSADCV2_AUTO_PERIOD_HT 0x6c 107cbac8f63SCaesar Wang 108cbac8f63SCaesar Wang #define TSADCV2_AUTO_EN BIT(0) 109cbac8f63SCaesar Wang #define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn)) 110cbac8f63SCaesar Wang #define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8) 111cbac8f63SCaesar Wang 112cbac8f63SCaesar Wang #define TSADCV2_INT_SRC_EN(chn) BIT(chn) 113cbac8f63SCaesar Wang #define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn)) 114cbac8f63SCaesar Wang #define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn)) 115cbac8f63SCaesar Wang 116452e01b3SDmitry Torokhov #define TSADCV2_INT_PD_CLEAR_MASK ~BIT(8) 117cbac8f63SCaesar Wang 118cbac8f63SCaesar Wang #define TSADCV2_DATA_MASK 0xfff 119cbac8f63SCaesar Wang #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4 120cbac8f63SCaesar Wang #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4 121cbac8f63SCaesar Wang #define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */ 122cbac8f63SCaesar Wang #define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */ 123cbac8f63SCaesar Wang 124cbac8f63SCaesar Wang struct tsadc_table { 125d9a241cbSDmitry Torokhov u32 code; 126cbac8f63SCaesar Wang long temp; 127cbac8f63SCaesar Wang }; 128cbac8f63SCaesar Wang 129cbac8f63SCaesar Wang static const struct tsadc_table v2_code_table[] = { 130cbac8f63SCaesar Wang {TSADCV2_DATA_MASK, -40000}, 131cbac8f63SCaesar Wang {3800, -40000}, 132cbac8f63SCaesar Wang {3792, -35000}, 133cbac8f63SCaesar Wang {3783, -30000}, 134cbac8f63SCaesar Wang {3774, -25000}, 135cbac8f63SCaesar Wang {3765, -20000}, 136cbac8f63SCaesar Wang {3756, -15000}, 137cbac8f63SCaesar Wang {3747, -10000}, 138cbac8f63SCaesar Wang {3737, -5000}, 139cbac8f63SCaesar Wang {3728, 0}, 140cbac8f63SCaesar Wang {3718, 5000}, 141cbac8f63SCaesar Wang {3708, 10000}, 142cbac8f63SCaesar Wang {3698, 15000}, 143cbac8f63SCaesar Wang {3688, 20000}, 144cbac8f63SCaesar Wang {3678, 25000}, 145cbac8f63SCaesar Wang {3667, 30000}, 146cbac8f63SCaesar Wang {3656, 35000}, 147cbac8f63SCaesar Wang {3645, 40000}, 148cbac8f63SCaesar Wang {3634, 45000}, 149cbac8f63SCaesar Wang {3623, 50000}, 150cbac8f63SCaesar Wang {3611, 55000}, 151cbac8f63SCaesar Wang {3600, 60000}, 152cbac8f63SCaesar Wang {3588, 65000}, 153cbac8f63SCaesar Wang {3575, 70000}, 154cbac8f63SCaesar Wang {3563, 75000}, 155cbac8f63SCaesar Wang {3550, 80000}, 156cbac8f63SCaesar Wang {3537, 85000}, 157cbac8f63SCaesar Wang {3524, 90000}, 158cbac8f63SCaesar Wang {3510, 95000}, 159cbac8f63SCaesar Wang {3496, 100000}, 160cbac8f63SCaesar Wang {3482, 105000}, 161cbac8f63SCaesar Wang {3467, 110000}, 162cbac8f63SCaesar Wang {3452, 115000}, 163cbac8f63SCaesar Wang {3437, 120000}, 164cbac8f63SCaesar Wang {3421, 125000}, 165cbac8f63SCaesar Wang }; 166cbac8f63SCaesar Wang 167cbac8f63SCaesar Wang static u32 rk_tsadcv2_temp_to_code(long temp) 168cbac8f63SCaesar Wang { 169cbac8f63SCaesar Wang int high, low, mid; 170cbac8f63SCaesar Wang 171cbac8f63SCaesar Wang low = 0; 172cbac8f63SCaesar Wang high = ARRAY_SIZE(v2_code_table) - 1; 173cbac8f63SCaesar Wang mid = (high + low) / 2; 174cbac8f63SCaesar Wang 175cbac8f63SCaesar Wang if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) 176cbac8f63SCaesar Wang return 0; 177cbac8f63SCaesar Wang 178cbac8f63SCaesar Wang while (low <= high) { 179cbac8f63SCaesar Wang if (temp == v2_code_table[mid].temp) 180cbac8f63SCaesar Wang return v2_code_table[mid].code; 181cbac8f63SCaesar Wang else if (temp < v2_code_table[mid].temp) 182cbac8f63SCaesar Wang high = mid - 1; 183cbac8f63SCaesar Wang else 184cbac8f63SCaesar Wang low = mid + 1; 185cbac8f63SCaesar Wang mid = (low + high) / 2; 186cbac8f63SCaesar Wang } 187cbac8f63SCaesar Wang 188cbac8f63SCaesar Wang return 0; 189cbac8f63SCaesar Wang } 190cbac8f63SCaesar Wang 191d9a241cbSDmitry Torokhov static int rk_tsadcv2_code_to_temp(u32 code, int *temp) 192cbac8f63SCaesar Wang { 193d9a241cbSDmitry Torokhov unsigned int low = 1; 1941e9a1aeaSCaesar Wang unsigned int high = ARRAY_SIZE(v2_code_table) - 1; 1951e9a1aeaSCaesar Wang unsigned int mid = (low + high) / 2; 1961e9a1aeaSCaesar Wang unsigned int num; 1971e9a1aeaSCaesar Wang unsigned long denom; 198cbac8f63SCaesar Wang 199d9a241cbSDmitry Torokhov BUILD_BUG_ON(ARRAY_SIZE(v2_code_table) < 2); 200cbac8f63SCaesar Wang 201d9a241cbSDmitry Torokhov code &= TSADCV2_DATA_MASK; 202d9a241cbSDmitry Torokhov if (code < v2_code_table[high].code) 203d9a241cbSDmitry Torokhov return -EAGAIN; /* Incorrect reading */ 204d9a241cbSDmitry Torokhov 205d9a241cbSDmitry Torokhov while (low <= high) { 2061e9a1aeaSCaesar Wang if (code >= v2_code_table[mid].code && 2071e9a1aeaSCaesar Wang code < v2_code_table[mid - 1].code) 2081e9a1aeaSCaesar Wang break; 209cbac8f63SCaesar Wang else if (code < v2_code_table[mid].code) 210cbac8f63SCaesar Wang low = mid + 1; 211cbac8f63SCaesar Wang else 212cbac8f63SCaesar Wang high = mid - 1; 213cbac8f63SCaesar Wang mid = (low + high) / 2; 214cbac8f63SCaesar Wang } 215cbac8f63SCaesar Wang 2161e9a1aeaSCaesar Wang /* 2171e9a1aeaSCaesar Wang * The 5C granularity provided by the table is too much. Let's 2181e9a1aeaSCaesar Wang * assume that the relationship between sensor readings and 2191e9a1aeaSCaesar Wang * temperature between 2 table entries is linear and interpolate 2201e9a1aeaSCaesar Wang * to produce less granular result. 2211e9a1aeaSCaesar Wang */ 2221e9a1aeaSCaesar Wang num = v2_code_table[mid].temp - v2_code_table[mid - 1].temp; 2231e9a1aeaSCaesar Wang num *= v2_code_table[mid - 1].code - code; 2241e9a1aeaSCaesar Wang denom = v2_code_table[mid - 1].code - v2_code_table[mid].code; 225d9a241cbSDmitry Torokhov *temp = v2_code_table[mid - 1].temp + (num / denom); 226d9a241cbSDmitry Torokhov 227d9a241cbSDmitry Torokhov return 0; 228cbac8f63SCaesar Wang } 229cbac8f63SCaesar Wang 230cbac8f63SCaesar Wang /** 231cbac8f63SCaesar Wang * rk_tsadcv2_initialize - initialize TASDC Controller 232cbac8f63SCaesar Wang * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between 233cbac8f63SCaesar Wang * every two accessing of TSADC in normal operation. 234cbac8f63SCaesar Wang * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between 235cbac8f63SCaesar Wang * every two accessing of TSADC after the temperature is higher 236cbac8f63SCaesar Wang * than COM_SHUT or COM_INT. 237cbac8f63SCaesar Wang * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE, 238cbac8f63SCaesar Wang * if the temperature is higher than COMP_INT or COMP_SHUT for 239cbac8f63SCaesar Wang * "debounce" times, TSADC controller will generate interrupt or TSHUT. 240cbac8f63SCaesar Wang */ 241cbac8f63SCaesar Wang static void rk_tsadcv2_initialize(void __iomem *regs, 242cbac8f63SCaesar Wang enum tshut_polarity tshut_polarity) 243cbac8f63SCaesar Wang { 244cbac8f63SCaesar Wang if (tshut_polarity == TSHUT_HIGH_ACTIVE) 245452e01b3SDmitry Torokhov writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH, 246cbac8f63SCaesar Wang regs + TSADCV2_AUTO_CON); 247cbac8f63SCaesar Wang else 248452e01b3SDmitry Torokhov writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH, 249cbac8f63SCaesar Wang regs + TSADCV2_AUTO_CON); 250cbac8f63SCaesar Wang 251cbac8f63SCaesar Wang writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD); 252cbac8f63SCaesar Wang writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT, 253cbac8f63SCaesar Wang regs + TSADCV2_HIGHT_INT_DEBOUNCE); 254cbac8f63SCaesar Wang writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, 255cbac8f63SCaesar Wang regs + TSADCV2_AUTO_PERIOD_HT); 256cbac8f63SCaesar Wang writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT, 257cbac8f63SCaesar Wang regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE); 258cbac8f63SCaesar Wang } 259cbac8f63SCaesar Wang 260cbac8f63SCaesar Wang static void rk_tsadcv2_irq_ack(void __iomem *regs) 261cbac8f63SCaesar Wang { 262cbac8f63SCaesar Wang u32 val; 263cbac8f63SCaesar Wang 264cbac8f63SCaesar Wang val = readl_relaxed(regs + TSADCV2_INT_PD); 265452e01b3SDmitry Torokhov writel_relaxed(val & TSADCV2_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD); 266cbac8f63SCaesar Wang } 267cbac8f63SCaesar Wang 268cbac8f63SCaesar Wang static void rk_tsadcv2_control(void __iomem *regs, bool enable) 269cbac8f63SCaesar Wang { 270cbac8f63SCaesar Wang u32 val; 271cbac8f63SCaesar Wang 272cbac8f63SCaesar Wang val = readl_relaxed(regs + TSADCV2_AUTO_CON); 273cbac8f63SCaesar Wang if (enable) 274cbac8f63SCaesar Wang val |= TSADCV2_AUTO_EN; 275cbac8f63SCaesar Wang else 276cbac8f63SCaesar Wang val &= ~TSADCV2_AUTO_EN; 277cbac8f63SCaesar Wang 278cbac8f63SCaesar Wang writel_relaxed(val, regs + TSADCV2_AUTO_CON); 279cbac8f63SCaesar Wang } 280cbac8f63SCaesar Wang 28117e8351aSSascha Hauer static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp) 282cbac8f63SCaesar Wang { 283cbac8f63SCaesar Wang u32 val; 284cbac8f63SCaesar Wang 285cbac8f63SCaesar Wang val = readl_relaxed(regs + TSADCV2_DATA(chn)); 286cbac8f63SCaesar Wang 287d9a241cbSDmitry Torokhov return rk_tsadcv2_code_to_temp(val, temp); 288cbac8f63SCaesar Wang } 289cbac8f63SCaesar Wang 290cbac8f63SCaesar Wang static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp) 291cbac8f63SCaesar Wang { 292cbac8f63SCaesar Wang u32 tshut_value, val; 293cbac8f63SCaesar Wang 294cbac8f63SCaesar Wang tshut_value = rk_tsadcv2_temp_to_code(temp); 295cbac8f63SCaesar Wang writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn)); 296cbac8f63SCaesar Wang 297cbac8f63SCaesar Wang /* TSHUT will be valid */ 298cbac8f63SCaesar Wang val = readl_relaxed(regs + TSADCV2_AUTO_CON); 299cbac8f63SCaesar Wang writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON); 300cbac8f63SCaesar Wang } 301cbac8f63SCaesar Wang 302cbac8f63SCaesar Wang static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs, 303cbac8f63SCaesar Wang enum tshut_mode mode) 304cbac8f63SCaesar Wang { 305cbac8f63SCaesar Wang u32 val; 306cbac8f63SCaesar Wang 307cbac8f63SCaesar Wang val = readl_relaxed(regs + TSADCV2_INT_EN); 308cbac8f63SCaesar Wang if (mode == TSHUT_MODE_GPIO) { 309cbac8f63SCaesar Wang val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn); 310cbac8f63SCaesar Wang val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn); 311cbac8f63SCaesar Wang } else { 312cbac8f63SCaesar Wang val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn); 313cbac8f63SCaesar Wang val |= TSADCV2_SHUT_2CRU_SRC_EN(chn); 314cbac8f63SCaesar Wang } 315cbac8f63SCaesar Wang 316cbac8f63SCaesar Wang writel_relaxed(val, regs + TSADCV2_INT_EN); 317cbac8f63SCaesar Wang } 318cbac8f63SCaesar Wang 319cbac8f63SCaesar Wang static const struct rockchip_tsadc_chip rk3288_tsadc_data = { 320cbac8f63SCaesar Wang .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ 321cbac8f63SCaesar Wang .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ 322cbac8f63SCaesar Wang .tshut_temp = 95000, 323cbac8f63SCaesar Wang 324cbac8f63SCaesar Wang .initialize = rk_tsadcv2_initialize, 325cbac8f63SCaesar Wang .irq_ack = rk_tsadcv2_irq_ack, 326cbac8f63SCaesar Wang .control = rk_tsadcv2_control, 327cbac8f63SCaesar Wang .get_temp = rk_tsadcv2_get_temp, 328cbac8f63SCaesar Wang .set_tshut_temp = rk_tsadcv2_tshut_temp, 329cbac8f63SCaesar Wang .set_tshut_mode = rk_tsadcv2_tshut_mode, 330cbac8f63SCaesar Wang }; 331cbac8f63SCaesar Wang 332cbac8f63SCaesar Wang static const struct of_device_id of_rockchip_thermal_match[] = { 333cbac8f63SCaesar Wang { 334cbac8f63SCaesar Wang .compatible = "rockchip,rk3288-tsadc", 335cbac8f63SCaesar Wang .data = (void *)&rk3288_tsadc_data, 336cbac8f63SCaesar Wang }, 337cbac8f63SCaesar Wang { /* end */ }, 338cbac8f63SCaesar Wang }; 339cbac8f63SCaesar Wang MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); 340cbac8f63SCaesar Wang 341cbac8f63SCaesar Wang static void 342cbac8f63SCaesar Wang rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on) 343cbac8f63SCaesar Wang { 344cbac8f63SCaesar Wang struct thermal_zone_device *tzd = sensor->tzd; 345cbac8f63SCaesar Wang 346cbac8f63SCaesar Wang tzd->ops->set_mode(tzd, 347cbac8f63SCaesar Wang on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED); 348cbac8f63SCaesar Wang } 349cbac8f63SCaesar Wang 350cbac8f63SCaesar Wang static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev) 351cbac8f63SCaesar Wang { 352cbac8f63SCaesar Wang struct rockchip_thermal_data *thermal = dev; 353cbac8f63SCaesar Wang int i; 354cbac8f63SCaesar Wang 355cbac8f63SCaesar Wang dev_dbg(&thermal->pdev->dev, "thermal alarm\n"); 356cbac8f63SCaesar Wang 357cbac8f63SCaesar Wang thermal->chip->irq_ack(thermal->regs); 358cbac8f63SCaesar Wang 359cbac8f63SCaesar Wang for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 360cbac8f63SCaesar Wang thermal_zone_device_update(thermal->sensors[i].tzd); 361cbac8f63SCaesar Wang 362cbac8f63SCaesar Wang return IRQ_HANDLED; 363cbac8f63SCaesar Wang } 364cbac8f63SCaesar Wang 36517e8351aSSascha Hauer static int rockchip_thermal_get_temp(void *_sensor, int *out_temp) 366cbac8f63SCaesar Wang { 367cbac8f63SCaesar Wang struct rockchip_thermal_sensor *sensor = _sensor; 368cbac8f63SCaesar Wang struct rockchip_thermal_data *thermal = sensor->thermal; 369cbac8f63SCaesar Wang const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip; 370cbac8f63SCaesar Wang int retval; 371cbac8f63SCaesar Wang 372cbac8f63SCaesar Wang retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp); 37317e8351aSSascha Hauer dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n", 374cbac8f63SCaesar Wang sensor->id, *out_temp, retval); 375cbac8f63SCaesar Wang 376cbac8f63SCaesar Wang return retval; 377cbac8f63SCaesar Wang } 378cbac8f63SCaesar Wang 379cbac8f63SCaesar Wang static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = { 380cbac8f63SCaesar Wang .get_temp = rockchip_thermal_get_temp, 381cbac8f63SCaesar Wang }; 382cbac8f63SCaesar Wang 383cbac8f63SCaesar Wang static int rockchip_configure_from_dt(struct device *dev, 384cbac8f63SCaesar Wang struct device_node *np, 385cbac8f63SCaesar Wang struct rockchip_thermal_data *thermal) 386cbac8f63SCaesar Wang { 387cbac8f63SCaesar Wang u32 shut_temp, tshut_mode, tshut_polarity; 388cbac8f63SCaesar Wang 389cbac8f63SCaesar Wang if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) { 390cbac8f63SCaesar Wang dev_warn(dev, 391cbac8f63SCaesar Wang "Missing tshut temp property, using default %ld\n", 392cbac8f63SCaesar Wang thermal->chip->tshut_temp); 393cbac8f63SCaesar Wang thermal->tshut_temp = thermal->chip->tshut_temp; 394cbac8f63SCaesar Wang } else { 395cbac8f63SCaesar Wang thermal->tshut_temp = shut_temp; 396cbac8f63SCaesar Wang } 397cbac8f63SCaesar Wang 398cbac8f63SCaesar Wang if (thermal->tshut_temp > INT_MAX) { 399cbac8f63SCaesar Wang dev_err(dev, "Invalid tshut temperature specified: %ld\n", 400cbac8f63SCaesar Wang thermal->tshut_temp); 401cbac8f63SCaesar Wang return -ERANGE; 402cbac8f63SCaesar Wang } 403cbac8f63SCaesar Wang 404cbac8f63SCaesar Wang if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) { 405cbac8f63SCaesar Wang dev_warn(dev, 406cbac8f63SCaesar Wang "Missing tshut mode property, using default (%s)\n", 407cbac8f63SCaesar Wang thermal->chip->tshut_mode == TSHUT_MODE_GPIO ? 408cbac8f63SCaesar Wang "gpio" : "cru"); 409cbac8f63SCaesar Wang thermal->tshut_mode = thermal->chip->tshut_mode; 410cbac8f63SCaesar Wang } else { 411cbac8f63SCaesar Wang thermal->tshut_mode = tshut_mode; 412cbac8f63SCaesar Wang } 413cbac8f63SCaesar Wang 414cbac8f63SCaesar Wang if (thermal->tshut_mode > 1) { 415cbac8f63SCaesar Wang dev_err(dev, "Invalid tshut mode specified: %d\n", 416cbac8f63SCaesar Wang thermal->tshut_mode); 417cbac8f63SCaesar Wang return -EINVAL; 418cbac8f63SCaesar Wang } 419cbac8f63SCaesar Wang 420cbac8f63SCaesar Wang if (of_property_read_u32(np, "rockchip,hw-tshut-polarity", 421cbac8f63SCaesar Wang &tshut_polarity)) { 422cbac8f63SCaesar Wang dev_warn(dev, 423cbac8f63SCaesar Wang "Missing tshut-polarity property, using default (%s)\n", 424cbac8f63SCaesar Wang thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ? 425cbac8f63SCaesar Wang "low" : "high"); 426cbac8f63SCaesar Wang thermal->tshut_polarity = thermal->chip->tshut_polarity; 427cbac8f63SCaesar Wang } else { 428cbac8f63SCaesar Wang thermal->tshut_polarity = tshut_polarity; 429cbac8f63SCaesar Wang } 430cbac8f63SCaesar Wang 431cbac8f63SCaesar Wang if (thermal->tshut_polarity > 1) { 432cbac8f63SCaesar Wang dev_err(dev, "Invalid tshut-polarity specified: %d\n", 433cbac8f63SCaesar Wang thermal->tshut_polarity); 434cbac8f63SCaesar Wang return -EINVAL; 435cbac8f63SCaesar Wang } 436cbac8f63SCaesar Wang 437cbac8f63SCaesar Wang return 0; 438cbac8f63SCaesar Wang } 439cbac8f63SCaesar Wang 440cbac8f63SCaesar Wang static int 441cbac8f63SCaesar Wang rockchip_thermal_register_sensor(struct platform_device *pdev, 442cbac8f63SCaesar Wang struct rockchip_thermal_data *thermal, 443cbac8f63SCaesar Wang struct rockchip_thermal_sensor *sensor, 444cbac8f63SCaesar Wang enum sensor_id id) 445cbac8f63SCaesar Wang { 446cbac8f63SCaesar Wang const struct rockchip_tsadc_chip *tsadc = thermal->chip; 447cbac8f63SCaesar Wang int error; 448cbac8f63SCaesar Wang 449cbac8f63SCaesar Wang tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode); 450cbac8f63SCaesar Wang tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp); 451cbac8f63SCaesar Wang 452cbac8f63SCaesar Wang sensor->thermal = thermal; 453cbac8f63SCaesar Wang sensor->id = id; 454cbac8f63SCaesar Wang sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor, 455cbac8f63SCaesar Wang &rockchip_of_thermal_ops); 456cbac8f63SCaesar Wang if (IS_ERR(sensor->tzd)) { 457cbac8f63SCaesar Wang error = PTR_ERR(sensor->tzd); 458cbac8f63SCaesar Wang dev_err(&pdev->dev, "failed to register sensor %d: %d\n", 459cbac8f63SCaesar Wang id, error); 460cbac8f63SCaesar Wang return error; 461cbac8f63SCaesar Wang } 462cbac8f63SCaesar Wang 463cbac8f63SCaesar Wang return 0; 464cbac8f63SCaesar Wang } 465cbac8f63SCaesar Wang 466cbac8f63SCaesar Wang /* 467cbac8f63SCaesar Wang * Reset TSADC Controller, reset all tsadc registers. 468cbac8f63SCaesar Wang */ 469cbac8f63SCaesar Wang static void rockchip_thermal_reset_controller(struct reset_control *reset) 470cbac8f63SCaesar Wang { 471cbac8f63SCaesar Wang reset_control_assert(reset); 472cbac8f63SCaesar Wang usleep_range(10, 20); 473cbac8f63SCaesar Wang reset_control_deassert(reset); 474cbac8f63SCaesar Wang } 475cbac8f63SCaesar Wang 476cbac8f63SCaesar Wang static int rockchip_thermal_probe(struct platform_device *pdev) 477cbac8f63SCaesar Wang { 478cbac8f63SCaesar Wang struct device_node *np = pdev->dev.of_node; 479cbac8f63SCaesar Wang struct rockchip_thermal_data *thermal; 480cbac8f63SCaesar Wang const struct of_device_id *match; 481cbac8f63SCaesar Wang struct resource *res; 482cbac8f63SCaesar Wang int irq; 483cbac8f63SCaesar Wang int i; 484cbac8f63SCaesar Wang int error; 485cbac8f63SCaesar Wang 486cbac8f63SCaesar Wang match = of_match_node(of_rockchip_thermal_match, np); 487cbac8f63SCaesar Wang if (!match) 488cbac8f63SCaesar Wang return -ENXIO; 489cbac8f63SCaesar Wang 490cbac8f63SCaesar Wang irq = platform_get_irq(pdev, 0); 491cbac8f63SCaesar Wang if (irq < 0) { 492cbac8f63SCaesar Wang dev_err(&pdev->dev, "no irq resource?\n"); 493cbac8f63SCaesar Wang return -EINVAL; 494cbac8f63SCaesar Wang } 495cbac8f63SCaesar Wang 496cbac8f63SCaesar Wang thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data), 497cbac8f63SCaesar Wang GFP_KERNEL); 498cbac8f63SCaesar Wang if (!thermal) 499cbac8f63SCaesar Wang return -ENOMEM; 500cbac8f63SCaesar Wang 501cbac8f63SCaesar Wang thermal->pdev = pdev; 502cbac8f63SCaesar Wang 503cbac8f63SCaesar Wang thermal->chip = (const struct rockchip_tsadc_chip *)match->data; 504cbac8f63SCaesar Wang if (!thermal->chip) 505cbac8f63SCaesar Wang return -EINVAL; 506cbac8f63SCaesar Wang 507cbac8f63SCaesar Wang res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 508cbac8f63SCaesar Wang thermal->regs = devm_ioremap_resource(&pdev->dev, res); 509cbac8f63SCaesar Wang if (IS_ERR(thermal->regs)) 510cbac8f63SCaesar Wang return PTR_ERR(thermal->regs); 511cbac8f63SCaesar Wang 512cbac8f63SCaesar Wang thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb"); 513cbac8f63SCaesar Wang if (IS_ERR(thermal->reset)) { 514cbac8f63SCaesar Wang error = PTR_ERR(thermal->reset); 515cbac8f63SCaesar Wang dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error); 516cbac8f63SCaesar Wang return error; 517cbac8f63SCaesar Wang } 518cbac8f63SCaesar Wang 519cbac8f63SCaesar Wang thermal->clk = devm_clk_get(&pdev->dev, "tsadc"); 520cbac8f63SCaesar Wang if (IS_ERR(thermal->clk)) { 521cbac8f63SCaesar Wang error = PTR_ERR(thermal->clk); 522cbac8f63SCaesar Wang dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error); 523cbac8f63SCaesar Wang return error; 524cbac8f63SCaesar Wang } 525cbac8f63SCaesar Wang 526cbac8f63SCaesar Wang thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); 527cbac8f63SCaesar Wang if (IS_ERR(thermal->pclk)) { 5280d0a2bf6SDan Carpenter error = PTR_ERR(thermal->pclk); 529cbac8f63SCaesar Wang dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n", 530cbac8f63SCaesar Wang error); 531cbac8f63SCaesar Wang return error; 532cbac8f63SCaesar Wang } 533cbac8f63SCaesar Wang 534cbac8f63SCaesar Wang error = clk_prepare_enable(thermal->clk); 535cbac8f63SCaesar Wang if (error) { 536cbac8f63SCaesar Wang dev_err(&pdev->dev, "failed to enable converter clock: %d\n", 537cbac8f63SCaesar Wang error); 538cbac8f63SCaesar Wang return error; 539cbac8f63SCaesar Wang } 540cbac8f63SCaesar Wang 541cbac8f63SCaesar Wang error = clk_prepare_enable(thermal->pclk); 542cbac8f63SCaesar Wang if (error) { 543cbac8f63SCaesar Wang dev_err(&pdev->dev, "failed to enable pclk: %d\n", error); 544cbac8f63SCaesar Wang goto err_disable_clk; 545cbac8f63SCaesar Wang } 546cbac8f63SCaesar Wang 547cbac8f63SCaesar Wang rockchip_thermal_reset_controller(thermal->reset); 548cbac8f63SCaesar Wang 549cbac8f63SCaesar Wang error = rockchip_configure_from_dt(&pdev->dev, np, thermal); 550cbac8f63SCaesar Wang if (error) { 551cbac8f63SCaesar Wang dev_err(&pdev->dev, "failed to parse device tree data: %d\n", 552cbac8f63SCaesar Wang error); 553cbac8f63SCaesar Wang goto err_disable_pclk; 554cbac8f63SCaesar Wang } 555cbac8f63SCaesar Wang 556cbac8f63SCaesar Wang thermal->chip->initialize(thermal->regs, thermal->tshut_polarity); 557cbac8f63SCaesar Wang 558cbac8f63SCaesar Wang error = rockchip_thermal_register_sensor(pdev, thermal, 559cbac8f63SCaesar Wang &thermal->sensors[0], 560cbac8f63SCaesar Wang SENSOR_CPU); 561cbac8f63SCaesar Wang if (error) { 562cbac8f63SCaesar Wang dev_err(&pdev->dev, 563cbac8f63SCaesar Wang "failed to register CPU thermal sensor: %d\n", error); 564cbac8f63SCaesar Wang goto err_disable_pclk; 565cbac8f63SCaesar Wang } 566cbac8f63SCaesar Wang 567cbac8f63SCaesar Wang error = rockchip_thermal_register_sensor(pdev, thermal, 568cbac8f63SCaesar Wang &thermal->sensors[1], 569cbac8f63SCaesar Wang SENSOR_GPU); 570cbac8f63SCaesar Wang if (error) { 571cbac8f63SCaesar Wang dev_err(&pdev->dev, 572cbac8f63SCaesar Wang "failed to register GPU thermal sensor: %d\n", error); 573cbac8f63SCaesar Wang goto err_unregister_cpu_sensor; 574cbac8f63SCaesar Wang } 575cbac8f63SCaesar Wang 576cbac8f63SCaesar Wang error = devm_request_threaded_irq(&pdev->dev, irq, NULL, 577cbac8f63SCaesar Wang &rockchip_thermal_alarm_irq_thread, 578cbac8f63SCaesar Wang IRQF_ONESHOT, 579cbac8f63SCaesar Wang "rockchip_thermal", thermal); 580cbac8f63SCaesar Wang if (error) { 581cbac8f63SCaesar Wang dev_err(&pdev->dev, 582cbac8f63SCaesar Wang "failed to request tsadc irq: %d\n", error); 583cbac8f63SCaesar Wang goto err_unregister_gpu_sensor; 584cbac8f63SCaesar Wang } 585cbac8f63SCaesar Wang 586cbac8f63SCaesar Wang thermal->chip->control(thermal->regs, true); 587cbac8f63SCaesar Wang 588cbac8f63SCaesar Wang for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 589cbac8f63SCaesar Wang rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); 590cbac8f63SCaesar Wang 591cbac8f63SCaesar Wang platform_set_drvdata(pdev, thermal); 592cbac8f63SCaesar Wang 593cbac8f63SCaesar Wang return 0; 594cbac8f63SCaesar Wang 595cbac8f63SCaesar Wang err_unregister_gpu_sensor: 596cbac8f63SCaesar Wang thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd); 597cbac8f63SCaesar Wang err_unregister_cpu_sensor: 598cbac8f63SCaesar Wang thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd); 599cbac8f63SCaesar Wang err_disable_pclk: 600cbac8f63SCaesar Wang clk_disable_unprepare(thermal->pclk); 601cbac8f63SCaesar Wang err_disable_clk: 602cbac8f63SCaesar Wang clk_disable_unprepare(thermal->clk); 603cbac8f63SCaesar Wang 604cbac8f63SCaesar Wang return error; 605cbac8f63SCaesar Wang } 606cbac8f63SCaesar Wang 607cbac8f63SCaesar Wang static int rockchip_thermal_remove(struct platform_device *pdev) 608cbac8f63SCaesar Wang { 609cbac8f63SCaesar Wang struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); 610cbac8f63SCaesar Wang int i; 611cbac8f63SCaesar Wang 612cbac8f63SCaesar Wang for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) { 613cbac8f63SCaesar Wang struct rockchip_thermal_sensor *sensor = &thermal->sensors[i]; 614cbac8f63SCaesar Wang 615cbac8f63SCaesar Wang rockchip_thermal_toggle_sensor(sensor, false); 616cbac8f63SCaesar Wang thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd); 617cbac8f63SCaesar Wang } 618cbac8f63SCaesar Wang 619cbac8f63SCaesar Wang thermal->chip->control(thermal->regs, false); 620cbac8f63SCaesar Wang 621cbac8f63SCaesar Wang clk_disable_unprepare(thermal->pclk); 622cbac8f63SCaesar Wang clk_disable_unprepare(thermal->clk); 623cbac8f63SCaesar Wang 624cbac8f63SCaesar Wang return 0; 625cbac8f63SCaesar Wang } 626cbac8f63SCaesar Wang 627cbac8f63SCaesar Wang static int __maybe_unused rockchip_thermal_suspend(struct device *dev) 628cbac8f63SCaesar Wang { 629cbac8f63SCaesar Wang struct platform_device *pdev = to_platform_device(dev); 630cbac8f63SCaesar Wang struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); 631cbac8f63SCaesar Wang int i; 632cbac8f63SCaesar Wang 633cbac8f63SCaesar Wang for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 634cbac8f63SCaesar Wang rockchip_thermal_toggle_sensor(&thermal->sensors[i], false); 635cbac8f63SCaesar Wang 636cbac8f63SCaesar Wang thermal->chip->control(thermal->regs, false); 637cbac8f63SCaesar Wang 638cbac8f63SCaesar Wang clk_disable(thermal->pclk); 639cbac8f63SCaesar Wang clk_disable(thermal->clk); 640cbac8f63SCaesar Wang 6417e38a5b1SCaesar Wang pinctrl_pm_select_sleep_state(dev); 6427e38a5b1SCaesar Wang 643cbac8f63SCaesar Wang return 0; 644cbac8f63SCaesar Wang } 645cbac8f63SCaesar Wang 646cbac8f63SCaesar Wang static int __maybe_unused rockchip_thermal_resume(struct device *dev) 647cbac8f63SCaesar Wang { 648cbac8f63SCaesar Wang struct platform_device *pdev = to_platform_device(dev); 649cbac8f63SCaesar Wang struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); 650cbac8f63SCaesar Wang int i; 651cbac8f63SCaesar Wang int error; 652cbac8f63SCaesar Wang 653cbac8f63SCaesar Wang error = clk_enable(thermal->clk); 654cbac8f63SCaesar Wang if (error) 655cbac8f63SCaesar Wang return error; 656cbac8f63SCaesar Wang 657cbac8f63SCaesar Wang error = clk_enable(thermal->pclk); 658cbac8f63SCaesar Wang if (error) 659cbac8f63SCaesar Wang return error; 660cbac8f63SCaesar Wang 661cbac8f63SCaesar Wang rockchip_thermal_reset_controller(thermal->reset); 662cbac8f63SCaesar Wang 663cbac8f63SCaesar Wang thermal->chip->initialize(thermal->regs, thermal->tshut_polarity); 664cbac8f63SCaesar Wang 665cbac8f63SCaesar Wang for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) { 666cbac8f63SCaesar Wang enum sensor_id id = thermal->sensors[i].id; 667cbac8f63SCaesar Wang 668cbac8f63SCaesar Wang thermal->chip->set_tshut_mode(id, thermal->regs, 669cbac8f63SCaesar Wang thermal->tshut_mode); 670cbac8f63SCaesar Wang thermal->chip->set_tshut_temp(id, thermal->regs, 671cbac8f63SCaesar Wang thermal->tshut_temp); 672cbac8f63SCaesar Wang } 673cbac8f63SCaesar Wang 674cbac8f63SCaesar Wang thermal->chip->control(thermal->regs, true); 675cbac8f63SCaesar Wang 676cbac8f63SCaesar Wang for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 677cbac8f63SCaesar Wang rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); 678cbac8f63SCaesar Wang 6797e38a5b1SCaesar Wang pinctrl_pm_select_default_state(dev); 6807e38a5b1SCaesar Wang 681cbac8f63SCaesar Wang return 0; 682cbac8f63SCaesar Wang } 683cbac8f63SCaesar Wang 684cbac8f63SCaesar Wang static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops, 685cbac8f63SCaesar Wang rockchip_thermal_suspend, rockchip_thermal_resume); 686cbac8f63SCaesar Wang 687cbac8f63SCaesar Wang static struct platform_driver rockchip_thermal_driver = { 688cbac8f63SCaesar Wang .driver = { 689cbac8f63SCaesar Wang .name = "rockchip-thermal", 690cbac8f63SCaesar Wang .pm = &rockchip_thermal_pm_ops, 691cbac8f63SCaesar Wang .of_match_table = of_rockchip_thermal_match, 692cbac8f63SCaesar Wang }, 693cbac8f63SCaesar Wang .probe = rockchip_thermal_probe, 694cbac8f63SCaesar Wang .remove = rockchip_thermal_remove, 695cbac8f63SCaesar Wang }; 696cbac8f63SCaesar Wang 697cbac8f63SCaesar Wang module_platform_driver(rockchip_thermal_driver); 698cbac8f63SCaesar Wang 699cbac8f63SCaesar Wang MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver"); 700cbac8f63SCaesar Wang MODULE_AUTHOR("Rockchip, Inc."); 701cbac8f63SCaesar Wang MODULE_LICENSE("GPL v2"); 702cbac8f63SCaesar Wang MODULE_ALIAS("platform:rockchip-thermal"); 703