180 lines
5.8 KiB
C
180 lines
5.8 KiB
C
/*
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* ST Thermal Sensor Driver for syscfg based sensors.
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* Author: Ajit Pal Singh <ajitpal.singh@st.com>
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*
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* Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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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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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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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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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 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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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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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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.owner = THIS_MODULE,
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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 <ajitpal.singh@st.com>");
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MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver");
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MODULE_LICENSE("GPL v2");
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