1186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones/* 2186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones * ST Thermal Sensor Driver for syscfg based sensors. 3186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones * Author: Ajit Pal Singh <ajitpal.singh@st.com> 4186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones * 5186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited 6186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones * 7186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones * This program is free software; you can redistribute it and/or modify 8186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones * it under the terms of the GNU General Public License as published by 9186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones * the Free Software Foundation; either version 2 of the License, or 10186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones * (at your option) any later version. 11186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones */ 12186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 13186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#include <linux/of.h> 14186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#include <linux/module.h> 15186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#include <linux/mfd/syscon.h> 16186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 17186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#include "st_thermal.h" 18186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 19186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones/* STiH415 */ 20186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STIH415_SYSCFG_FRONT(num) ((num - 100) * 4) 21186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STIH415_SAS_THSENS_CONF STIH415_SYSCFG_FRONT(178) 22186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STIH415_SAS_THSENS_STATUS STIH415_SYSCFG_FRONT(198) 23186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STIH415_SYSCFG_MPE(num) ((num - 600) * 4) 24186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STIH415_MPE_THSENS_CONF STIH415_SYSCFG_MPE(607) 25186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STIH415_MPE_THSENS_STATUS STIH415_SYSCFG_MPE(667) 26186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 27186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones/* STiH416 */ 28186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STIH416_SYSCFG_FRONT(num) ((num - 1000) * 4) 29186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STIH416_SAS_THSENS_CONF STIH416_SYSCFG_FRONT(1552) 30186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STIH416_SAS_THSENS_STATUS1 STIH416_SYSCFG_FRONT(1554) 31186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STIH416_SAS_THSENS_STATUS2 STIH416_SYSCFG_FRONT(1594) 32186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 33186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones/* STiD127 */ 34186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STID127_SYSCFG_CPU(num) ((num - 700) * 4) 35186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STID127_THSENS_CONF STID127_SYSCFG_CPU(743) 36186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones#define STID127_THSENS_STATUS STID127_SYSCFG_CPU(767) 37186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 38186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesstatic const struct reg_field st_415sas_regfields[MAX_REGFIELDS] = { 39186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [TEMP_PWR] = REG_FIELD(STIH415_SAS_THSENS_CONF, 9, 9), 40186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [DCORRECT] = REG_FIELD(STIH415_SAS_THSENS_CONF, 4, 8), 41186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [OVERFLOW] = REG_FIELD(STIH415_SAS_THSENS_STATUS, 8, 8), 42186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [DATA] = REG_FIELD(STIH415_SAS_THSENS_STATUS, 10, 16), 43186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 44186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 45186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesstatic const struct reg_field st_415mpe_regfields[MAX_REGFIELDS] = { 46186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [TEMP_PWR] = REG_FIELD(STIH415_MPE_THSENS_CONF, 8, 8), 47186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [DCORRECT] = REG_FIELD(STIH415_MPE_THSENS_CONF, 3, 7), 48186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [OVERFLOW] = REG_FIELD(STIH415_MPE_THSENS_STATUS, 9, 9), 49186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [DATA] = REG_FIELD(STIH415_MPE_THSENS_STATUS, 11, 18), 50186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 51186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 52186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesstatic const struct reg_field st_416sas_regfields[MAX_REGFIELDS] = { 53186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [TEMP_PWR] = REG_FIELD(STIH416_SAS_THSENS_CONF, 9, 9), 54186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [DCORRECT] = REG_FIELD(STIH416_SAS_THSENS_CONF, 4, 8), 55186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [OVERFLOW] = REG_FIELD(STIH416_SAS_THSENS_STATUS1, 8, 8), 56186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [DATA] = REG_FIELD(STIH416_SAS_THSENS_STATUS2, 10, 16), 57186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 58186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 59186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesstatic const struct reg_field st_127_regfields[MAX_REGFIELDS] = { 60186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [TEMP_PWR] = REG_FIELD(STID127_THSENS_CONF, 7, 7), 61186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [DCORRECT] = REG_FIELD(STID127_THSENS_CONF, 2, 6), 62186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [OVERFLOW] = REG_FIELD(STID127_THSENS_STATUS, 9, 9), 63186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones [DATA] = REG_FIELD(STID127_THSENS_STATUS, 11, 18), 64186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 65186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 66186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones/* Private OPs for System Configuration Register based thermal sensors */ 67186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesstatic int st_syscfg_power_ctrl(struct st_thermal_sensor *sensor, 68186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones enum st_thermal_power_state power_state) 69186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones{ 70186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones return regmap_field_write(sensor->pwr, power_state); 71186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones} 72186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 73186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesstatic int st_syscfg_alloc_regfields(struct st_thermal_sensor *sensor) 74186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones{ 75186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones struct device *dev = sensor->dev; 76186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 77186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones sensor->pwr = devm_regmap_field_alloc(dev, sensor->regmap, 78186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones sensor->cdata->reg_fields[TEMP_PWR]); 79186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 80186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones if (IS_ERR(sensor->pwr)) { 81186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones dev_err(dev, "failed to alloc syscfg regfields\n"); 82186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones return PTR_ERR(sensor->pwr); 83186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones } 84186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 85186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones return 0; 86186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones} 87186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 88186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesstatic int st_syscfg_regmap_init(struct st_thermal_sensor *sensor) 89186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones{ 90186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones sensor->regmap = 91186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones syscon_regmap_lookup_by_compatible(sensor->cdata->sys_compat); 92186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones if (IS_ERR(sensor->regmap)) { 93186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones dev_err(sensor->dev, "failed to find syscfg regmap\n"); 94186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones return PTR_ERR(sensor->regmap); 95186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones } 96186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 97186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones return 0; 98186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones} 99186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 100186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesstatic const struct st_thermal_sensor_ops st_syscfg_sensor_ops = { 101186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .power_ctrl = st_syscfg_power_ctrl, 102186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .alloc_regfields = st_syscfg_alloc_regfields, 103186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .regmap_init = st_syscfg_regmap_init, 104186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 105186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 106186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones/* Compatible device data for stih415 sas thermal sensor */ 107186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesconst struct st_thermal_compat_data st_415sas_cdata = { 108186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .sys_compat = "st,stih415-front-syscfg", 109186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .reg_fields = st_415sas_regfields, 110186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .ops = &st_syscfg_sensor_ops, 111186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .calibration_val = 16, 112186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .temp_adjust_val = 20, 113186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .crit_temp = 120, 114186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 115186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 116186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones/* Compatible device data for stih415 mpe thermal sensor */ 117186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesconst struct st_thermal_compat_data st_415mpe_cdata = { 118186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .sys_compat = "st,stih415-system-syscfg", 119186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .reg_fields = st_415mpe_regfields, 120186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .ops = &st_syscfg_sensor_ops, 121186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .calibration_val = 16, 122186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .temp_adjust_val = -103, 123186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .crit_temp = 120, 124186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 125186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 126186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones/* Compatible device data for stih416 sas thermal sensor */ 127186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesconst struct st_thermal_compat_data st_416sas_cdata = { 128186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .sys_compat = "st,stih416-front-syscfg", 129186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .reg_fields = st_416sas_regfields, 130186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .ops = &st_syscfg_sensor_ops, 131186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .calibration_val = 16, 132186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .temp_adjust_val = 20, 133186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .crit_temp = 120, 134186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 135186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 136186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones/* Compatible device data for stid127 thermal sensor */ 137186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesconst struct st_thermal_compat_data st_127_cdata = { 138186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .sys_compat = "st,stid127-cpu-syscfg", 139186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .reg_fields = st_127_regfields, 140186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .ops = &st_syscfg_sensor_ops, 141186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .calibration_val = 8, 142186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .temp_adjust_val = -103, 143186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .crit_temp = 120, 144186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 145186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 146186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesstatic struct of_device_id st_syscfg_thermal_of_match[] = { 147186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones { .compatible = "st,stih415-sas-thermal", .data = &st_415sas_cdata }, 148186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones { .compatible = "st,stih415-mpe-thermal", .data = &st_415mpe_cdata }, 149186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones { .compatible = "st,stih416-sas-thermal", .data = &st_416sas_cdata }, 150186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones { .compatible = "st,stid127-thermal", .data = &st_127_cdata }, 151186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones { /* sentinel */ } 152186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 153186bf54932f9d8fe575b04f4558de19e8a17aa93Lee JonesMODULE_DEVICE_TABLE(of, st_syscfg_thermal_of_match); 154186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 155186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesint st_syscfg_probe(struct platform_device *pdev) 156186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones{ 157186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones return st_thermal_register(pdev, st_syscfg_thermal_of_match); 158186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones} 159186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 160186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesint st_syscfg_remove(struct platform_device *pdev) 161186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones{ 162186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones return st_thermal_unregister(pdev); 163186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones} 164186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 165186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesstatic struct platform_driver st_syscfg_thermal_driver = { 166186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .driver = { 167186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .name = "st_syscfg_thermal", 168186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .owner = THIS_MODULE, 169186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .pm = &st_thermal_pm_ops, 170186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .of_match_table = st_syscfg_thermal_of_match, 171186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones }, 172186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .probe = st_syscfg_probe, 173186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones .remove = st_syscfg_remove, 174186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones}; 175186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jonesmodule_platform_driver(st_syscfg_thermal_driver); 176186bf54932f9d8fe575b04f4558de19e8a17aa93Lee Jones 177186bf54932f9d8fe575b04f4558de19e8a17aa93Lee JonesMODULE_AUTHOR("STMicroelectronics (R&D) Limited <ajitpal.singh@st.com>"); 178186bf54932f9d8fe575b04f4558de19e8a17aa93Lee JonesMODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver"); 179186bf54932f9d8fe575b04f4558de19e8a17aa93Lee JonesMODULE_LICENSE("GPL v2"); 180