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174 lines
5.6 KiB
174 lines
5.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* ST Thermal Sensor Driver for syscfg based sensors. |
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* Author: Ajit Pal Singh <[email protected]> |
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* |
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* Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited |
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*/ |
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#include <linux/of.h> |
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#include <linux/module.h> |
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#include <linux/mfd/syscon.h> |
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#include "st_thermal.h" |
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/* STiH415 */ |
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#define STIH415_SYSCFG_FRONT(num) ((num - 100) * 4) |
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#define STIH415_SAS_THSENS_CONF STIH415_SYSCFG_FRONT(178) |
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#define STIH415_SAS_THSENS_STATUS STIH415_SYSCFG_FRONT(198) |
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#define STIH415_SYSCFG_MPE(num) ((num - 600) * 4) |
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#define STIH415_MPE_THSENS_CONF STIH415_SYSCFG_MPE(607) |
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#define STIH415_MPE_THSENS_STATUS STIH415_SYSCFG_MPE(667) |
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/* STiH416 */ |
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#define STIH416_SYSCFG_FRONT(num) ((num - 1000) * 4) |
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#define STIH416_SAS_THSENS_CONF STIH416_SYSCFG_FRONT(1552) |
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#define STIH416_SAS_THSENS_STATUS1 STIH416_SYSCFG_FRONT(1554) |
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#define STIH416_SAS_THSENS_STATUS2 STIH416_SYSCFG_FRONT(1594) |
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/* STiD127 */ |
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#define STID127_SYSCFG_CPU(num) ((num - 700) * 4) |
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#define STID127_THSENS_CONF STID127_SYSCFG_CPU(743) |
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#define STID127_THSENS_STATUS STID127_SYSCFG_CPU(767) |
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static const struct reg_field st_415sas_regfields[MAX_REGFIELDS] = { |
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[TEMP_PWR] = REG_FIELD(STIH415_SAS_THSENS_CONF, 9, 9), |
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[DCORRECT] = REG_FIELD(STIH415_SAS_THSENS_CONF, 4, 8), |
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[OVERFLOW] = REG_FIELD(STIH415_SAS_THSENS_STATUS, 8, 8), |
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[DATA] = REG_FIELD(STIH415_SAS_THSENS_STATUS, 10, 16), |
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}; |
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static const struct reg_field st_415mpe_regfields[MAX_REGFIELDS] = { |
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[TEMP_PWR] = REG_FIELD(STIH415_MPE_THSENS_CONF, 8, 8), |
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[DCORRECT] = REG_FIELD(STIH415_MPE_THSENS_CONF, 3, 7), |
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[OVERFLOW] = REG_FIELD(STIH415_MPE_THSENS_STATUS, 9, 9), |
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[DATA] = REG_FIELD(STIH415_MPE_THSENS_STATUS, 11, 18), |
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}; |
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static const struct reg_field st_416sas_regfields[MAX_REGFIELDS] = { |
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[TEMP_PWR] = REG_FIELD(STIH416_SAS_THSENS_CONF, 9, 9), |
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[DCORRECT] = REG_FIELD(STIH416_SAS_THSENS_CONF, 4, 8), |
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[OVERFLOW] = REG_FIELD(STIH416_SAS_THSENS_STATUS1, 8, 8), |
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[DATA] = REG_FIELD(STIH416_SAS_THSENS_STATUS2, 10, 16), |
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}; |
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static const struct reg_field st_127_regfields[MAX_REGFIELDS] = { |
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[TEMP_PWR] = REG_FIELD(STID127_THSENS_CONF, 7, 7), |
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[DCORRECT] = REG_FIELD(STID127_THSENS_CONF, 2, 6), |
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[OVERFLOW] = REG_FIELD(STID127_THSENS_STATUS, 9, 9), |
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[DATA] = REG_FIELD(STID127_THSENS_STATUS, 11, 18), |
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}; |
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/* Private OPs for System Configuration Register based thermal sensors */ |
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static int st_syscfg_power_ctrl(struct st_thermal_sensor *sensor, |
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enum st_thermal_power_state power_state) |
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{ |
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return regmap_field_write(sensor->pwr, power_state); |
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} |
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static int st_syscfg_alloc_regfields(struct st_thermal_sensor *sensor) |
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{ |
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struct device *dev = sensor->dev; |
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sensor->pwr = devm_regmap_field_alloc(dev, sensor->regmap, |
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sensor->cdata->reg_fields[TEMP_PWR]); |
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if (IS_ERR(sensor->pwr)) { |
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dev_err(dev, "failed to alloc syscfg regfields\n"); |
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return PTR_ERR(sensor->pwr); |
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} |
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return 0; |
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} |
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static int st_syscfg_regmap_init(struct st_thermal_sensor *sensor) |
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{ |
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sensor->regmap = |
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syscon_regmap_lookup_by_compatible(sensor->cdata->sys_compat); |
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if (IS_ERR(sensor->regmap)) { |
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dev_err(sensor->dev, "failed to find syscfg regmap\n"); |
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return PTR_ERR(sensor->regmap); |
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} |
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return 0; |
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} |
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static const struct st_thermal_sensor_ops st_syscfg_sensor_ops = { |
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.power_ctrl = st_syscfg_power_ctrl, |
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.alloc_regfields = st_syscfg_alloc_regfields, |
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.regmap_init = st_syscfg_regmap_init, |
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}; |
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/* Compatible device data for stih415 sas thermal sensor */ |
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static const struct st_thermal_compat_data st_415sas_cdata = { |
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.sys_compat = "st,stih415-front-syscfg", |
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.reg_fields = st_415sas_regfields, |
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.ops = &st_syscfg_sensor_ops, |
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.calibration_val = 16, |
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.temp_adjust_val = 20, |
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.crit_temp = 120, |
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}; |
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/* Compatible device data for stih415 mpe thermal sensor */ |
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static const struct st_thermal_compat_data st_415mpe_cdata = { |
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.sys_compat = "st,stih415-system-syscfg", |
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.reg_fields = st_415mpe_regfields, |
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.ops = &st_syscfg_sensor_ops, |
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.calibration_val = 16, |
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.temp_adjust_val = -103, |
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.crit_temp = 120, |
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}; |
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/* Compatible device data for stih416 sas thermal sensor */ |
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static const struct st_thermal_compat_data st_416sas_cdata = { |
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.sys_compat = "st,stih416-front-syscfg", |
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.reg_fields = st_416sas_regfields, |
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.ops = &st_syscfg_sensor_ops, |
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.calibration_val = 16, |
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.temp_adjust_val = 20, |
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.crit_temp = 120, |
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}; |
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/* Compatible device data for stid127 thermal sensor */ |
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static const struct st_thermal_compat_data st_127_cdata = { |
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.sys_compat = "st,stid127-cpu-syscfg", |
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.reg_fields = st_127_regfields, |
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.ops = &st_syscfg_sensor_ops, |
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.calibration_val = 8, |
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.temp_adjust_val = -103, |
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.crit_temp = 120, |
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}; |
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static const struct of_device_id st_syscfg_thermal_of_match[] = { |
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{ .compatible = "st,stih415-sas-thermal", .data = &st_415sas_cdata }, |
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{ .compatible = "st,stih415-mpe-thermal", .data = &st_415mpe_cdata }, |
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{ .compatible = "st,stih416-sas-thermal", .data = &st_416sas_cdata }, |
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{ .compatible = "st,stid127-thermal", .data = &st_127_cdata }, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(of, st_syscfg_thermal_of_match); |
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static int st_syscfg_probe(struct platform_device *pdev) |
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{ |
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return st_thermal_register(pdev, st_syscfg_thermal_of_match); |
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} |
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static int st_syscfg_remove(struct platform_device *pdev) |
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{ |
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return st_thermal_unregister(pdev); |
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} |
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static struct platform_driver st_syscfg_thermal_driver = { |
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.driver = { |
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.name = "st_syscfg_thermal", |
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.pm = &st_thermal_pm_ops, |
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.of_match_table = st_syscfg_thermal_of_match, |
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}, |
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.probe = st_syscfg_probe, |
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.remove = st_syscfg_remove, |
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}; |
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module_platform_driver(st_syscfg_thermal_driver); |
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MODULE_AUTHOR("STMicroelectronics (R&D) Limited <[email protected]>"); |
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MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver"); |
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MODULE_LICENSE("GPL v2");
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