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