st_thermal_syscfg.c (5761B)
1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * ST Thermal Sensor Driver for syscfg based sensors. 4 * Author: Ajit Pal Singh <ajitpal.singh@st.com> 5 * 6 * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited 7 */ 8 9#include <linux/of.h> 10#include <linux/module.h> 11#include <linux/mfd/syscon.h> 12 13#include "st_thermal.h" 14 15/* STiH415 */ 16#define STIH415_SYSCFG_FRONT(num) ((num - 100) * 4) 17#define STIH415_SAS_THSENS_CONF STIH415_SYSCFG_FRONT(178) 18#define STIH415_SAS_THSENS_STATUS STIH415_SYSCFG_FRONT(198) 19#define STIH415_SYSCFG_MPE(num) ((num - 600) * 4) 20#define STIH415_MPE_THSENS_CONF STIH415_SYSCFG_MPE(607) 21#define STIH415_MPE_THSENS_STATUS STIH415_SYSCFG_MPE(667) 22 23/* STiH416 */ 24#define STIH416_SYSCFG_FRONT(num) ((num - 1000) * 4) 25#define STIH416_SAS_THSENS_CONF STIH416_SYSCFG_FRONT(1552) 26#define STIH416_SAS_THSENS_STATUS1 STIH416_SYSCFG_FRONT(1554) 27#define STIH416_SAS_THSENS_STATUS2 STIH416_SYSCFG_FRONT(1594) 28 29/* STiD127 */ 30#define STID127_SYSCFG_CPU(num) ((num - 700) * 4) 31#define STID127_THSENS_CONF STID127_SYSCFG_CPU(743) 32#define STID127_THSENS_STATUS STID127_SYSCFG_CPU(767) 33 34static const struct reg_field st_415sas_regfields[MAX_REGFIELDS] = { 35 [TEMP_PWR] = REG_FIELD(STIH415_SAS_THSENS_CONF, 9, 9), 36 [DCORRECT] = REG_FIELD(STIH415_SAS_THSENS_CONF, 4, 8), 37 [OVERFLOW] = REG_FIELD(STIH415_SAS_THSENS_STATUS, 8, 8), 38 [DATA] = REG_FIELD(STIH415_SAS_THSENS_STATUS, 10, 16), 39}; 40 41static const struct reg_field st_415mpe_regfields[MAX_REGFIELDS] = { 42 [TEMP_PWR] = REG_FIELD(STIH415_MPE_THSENS_CONF, 8, 8), 43 [DCORRECT] = REG_FIELD(STIH415_MPE_THSENS_CONF, 3, 7), 44 [OVERFLOW] = REG_FIELD(STIH415_MPE_THSENS_STATUS, 9, 9), 45 [DATA] = REG_FIELD(STIH415_MPE_THSENS_STATUS, 11, 18), 46}; 47 48static const struct reg_field st_416sas_regfields[MAX_REGFIELDS] = { 49 [TEMP_PWR] = REG_FIELD(STIH416_SAS_THSENS_CONF, 9, 9), 50 [DCORRECT] = REG_FIELD(STIH416_SAS_THSENS_CONF, 4, 8), 51 [OVERFLOW] = REG_FIELD(STIH416_SAS_THSENS_STATUS1, 8, 8), 52 [DATA] = REG_FIELD(STIH416_SAS_THSENS_STATUS2, 10, 16), 53}; 54 55static const struct reg_field st_127_regfields[MAX_REGFIELDS] = { 56 [TEMP_PWR] = REG_FIELD(STID127_THSENS_CONF, 7, 7), 57 [DCORRECT] = REG_FIELD(STID127_THSENS_CONF, 2, 6), 58 [OVERFLOW] = REG_FIELD(STID127_THSENS_STATUS, 9, 9), 59 [DATA] = REG_FIELD(STID127_THSENS_STATUS, 11, 18), 60}; 61 62/* Private OPs for System Configuration Register based thermal sensors */ 63static int st_syscfg_power_ctrl(struct st_thermal_sensor *sensor, 64 enum st_thermal_power_state power_state) 65{ 66 return regmap_field_write(sensor->pwr, power_state); 67} 68 69static int st_syscfg_alloc_regfields(struct st_thermal_sensor *sensor) 70{ 71 struct device *dev = sensor->dev; 72 73 sensor->pwr = devm_regmap_field_alloc(dev, sensor->regmap, 74 sensor->cdata->reg_fields[TEMP_PWR]); 75 76 if (IS_ERR(sensor->pwr)) { 77 dev_err(dev, "failed to alloc syscfg regfields\n"); 78 return PTR_ERR(sensor->pwr); 79 } 80 81 return 0; 82} 83 84static int st_syscfg_regmap_init(struct st_thermal_sensor *sensor) 85{ 86 sensor->regmap = 87 syscon_regmap_lookup_by_compatible(sensor->cdata->sys_compat); 88 if (IS_ERR(sensor->regmap)) { 89 dev_err(sensor->dev, "failed to find syscfg regmap\n"); 90 return PTR_ERR(sensor->regmap); 91 } 92 93 return 0; 94} 95 96static const struct st_thermal_sensor_ops st_syscfg_sensor_ops = { 97 .power_ctrl = st_syscfg_power_ctrl, 98 .alloc_regfields = st_syscfg_alloc_regfields, 99 .regmap_init = st_syscfg_regmap_init, 100}; 101 102/* Compatible device data for stih415 sas thermal sensor */ 103static const struct st_thermal_compat_data st_415sas_cdata = { 104 .sys_compat = "st,stih415-front-syscfg", 105 .reg_fields = st_415sas_regfields, 106 .ops = &st_syscfg_sensor_ops, 107 .calibration_val = 16, 108 .temp_adjust_val = 20, 109 .crit_temp = 120, 110}; 111 112/* Compatible device data for stih415 mpe thermal sensor */ 113static const struct st_thermal_compat_data st_415mpe_cdata = { 114 .sys_compat = "st,stih415-system-syscfg", 115 .reg_fields = st_415mpe_regfields, 116 .ops = &st_syscfg_sensor_ops, 117 .calibration_val = 16, 118 .temp_adjust_val = -103, 119 .crit_temp = 120, 120}; 121 122/* Compatible device data for stih416 sas thermal sensor */ 123static const struct st_thermal_compat_data st_416sas_cdata = { 124 .sys_compat = "st,stih416-front-syscfg", 125 .reg_fields = st_416sas_regfields, 126 .ops = &st_syscfg_sensor_ops, 127 .calibration_val = 16, 128 .temp_adjust_val = 20, 129 .crit_temp = 120, 130}; 131 132/* Compatible device data for stid127 thermal sensor */ 133static const struct st_thermal_compat_data st_127_cdata = { 134 .sys_compat = "st,stid127-cpu-syscfg", 135 .reg_fields = st_127_regfields, 136 .ops = &st_syscfg_sensor_ops, 137 .calibration_val = 8, 138 .temp_adjust_val = -103, 139 .crit_temp = 120, 140}; 141 142static const struct of_device_id st_syscfg_thermal_of_match[] = { 143 { .compatible = "st,stih415-sas-thermal", .data = &st_415sas_cdata }, 144 { .compatible = "st,stih415-mpe-thermal", .data = &st_415mpe_cdata }, 145 { .compatible = "st,stih416-sas-thermal", .data = &st_416sas_cdata }, 146 { .compatible = "st,stid127-thermal", .data = &st_127_cdata }, 147 { /* sentinel */ } 148}; 149MODULE_DEVICE_TABLE(of, st_syscfg_thermal_of_match); 150 151static int st_syscfg_probe(struct platform_device *pdev) 152{ 153 return st_thermal_register(pdev, st_syscfg_thermal_of_match); 154} 155 156static int st_syscfg_remove(struct platform_device *pdev) 157{ 158 return st_thermal_unregister(pdev); 159} 160 161static struct platform_driver st_syscfg_thermal_driver = { 162 .driver = { 163 .name = "st_syscfg_thermal", 164 .pm = &st_thermal_pm_ops, 165 .of_match_table = st_syscfg_thermal_of_match, 166 }, 167 .probe = st_syscfg_probe, 168 .remove = st_syscfg_remove, 169}; 170module_platform_driver(st_syscfg_thermal_driver); 171 172MODULE_AUTHOR("STMicroelectronics (R&D) Limited <ajitpal.singh@st.com>"); 173MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver"); 174MODULE_LICENSE("GPL v2");