mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Tang Bin](/assets/img/avatar_default.png)
The function devm_platform_ioremap_resource has already contains error message, so remove the redundant dev_err here. Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20210222061105.6008-1-tangbin@cmss.chinamobile.com
339 lines
8.4 KiB
C
339 lines
8.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Amlogic Thermal Sensor Driver
|
|
*
|
|
* Copyright (C) 2017 Huan Biao <huan.biao@amlogic.com>
|
|
* Copyright (C) 2019 Guillaume La Roque <glaroque@baylibre.com>
|
|
*
|
|
* Register value to celsius temperature formulas:
|
|
* Read_Val m * U
|
|
* U = ---------, Uptat = ---------
|
|
* 2^16 1 + n * U
|
|
*
|
|
* Temperature = A * ( Uptat + u_efuse / 2^16 )- B
|
|
*
|
|
* A B m n : calibration parameters
|
|
* u_efuse : fused calibration value, it's a signed 16 bits value
|
|
*/
|
|
|
|
#include <linux/bitfield.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/io.h>
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/thermal.h>
|
|
|
|
#include "thermal_core.h"
|
|
#include "thermal_hwmon.h"
|
|
|
|
#define TSENSOR_CFG_REG1 0x4
|
|
#define TSENSOR_CFG_REG1_RSET_VBG BIT(12)
|
|
#define TSENSOR_CFG_REG1_RSET_ADC BIT(11)
|
|
#define TSENSOR_CFG_REG1_VCM_EN BIT(10)
|
|
#define TSENSOR_CFG_REG1_VBG_EN BIT(9)
|
|
#define TSENSOR_CFG_REG1_OUT_CTL BIT(6)
|
|
#define TSENSOR_CFG_REG1_FILTER_EN BIT(5)
|
|
#define TSENSOR_CFG_REG1_DEM_EN BIT(3)
|
|
#define TSENSOR_CFG_REG1_CH_SEL GENMASK(1, 0)
|
|
#define TSENSOR_CFG_REG1_ENABLE \
|
|
(TSENSOR_CFG_REG1_FILTER_EN | \
|
|
TSENSOR_CFG_REG1_VCM_EN | \
|
|
TSENSOR_CFG_REG1_VBG_EN | \
|
|
TSENSOR_CFG_REG1_DEM_EN | \
|
|
TSENSOR_CFG_REG1_CH_SEL)
|
|
|
|
#define TSENSOR_STAT0 0x40
|
|
|
|
#define TSENSOR_STAT9 0x64
|
|
|
|
#define TSENSOR_READ_TEMP_MASK GENMASK(15, 0)
|
|
#define TSENSOR_TEMP_MASK GENMASK(11, 0)
|
|
|
|
#define TSENSOR_TRIM_SIGN_MASK BIT(15)
|
|
#define TSENSOR_TRIM_TEMP_MASK GENMASK(14, 0)
|
|
#define TSENSOR_TRIM_VERSION_MASK GENMASK(31, 24)
|
|
|
|
#define TSENSOR_TRIM_VERSION(_version) \
|
|
FIELD_GET(TSENSOR_TRIM_VERSION_MASK, _version)
|
|
|
|
#define TSENSOR_TRIM_CALIB_VALID_MASK (GENMASK(3, 2) | BIT(7))
|
|
|
|
#define TSENSOR_CALIB_OFFSET 1
|
|
#define TSENSOR_CALIB_SHIFT 4
|
|
|
|
/**
|
|
* struct amlogic_thermal_soc_calib_data
|
|
* @A: calibration parameters
|
|
* @B: calibration parameters
|
|
* @m: calibration parameters
|
|
* @n: calibration parameters
|
|
*
|
|
* This structure is required for configuration of amlogic thermal driver.
|
|
*/
|
|
struct amlogic_thermal_soc_calib_data {
|
|
int A;
|
|
int B;
|
|
int m;
|
|
int n;
|
|
};
|
|
|
|
/**
|
|
* struct amlogic_thermal_data
|
|
* @u_efuse_off: register offset to read fused calibration value
|
|
* @calibration_parameters: calibration parameters structure pointer
|
|
* @regmap_config: regmap config for the device
|
|
* This structure is required for configuration of amlogic thermal driver.
|
|
*/
|
|
struct amlogic_thermal_data {
|
|
int u_efuse_off;
|
|
const struct amlogic_thermal_soc_calib_data *calibration_parameters;
|
|
const struct regmap_config *regmap_config;
|
|
};
|
|
|
|
struct amlogic_thermal {
|
|
struct platform_device *pdev;
|
|
const struct amlogic_thermal_data *data;
|
|
struct regmap *regmap;
|
|
struct regmap *sec_ao_map;
|
|
struct clk *clk;
|
|
struct thermal_zone_device *tzd;
|
|
u32 trim_info;
|
|
};
|
|
|
|
/*
|
|
* Calculate a temperature value from a temperature code.
|
|
* The unit of the temperature is degree milliCelsius.
|
|
*/
|
|
static int amlogic_thermal_code_to_millicelsius(struct amlogic_thermal *pdata,
|
|
int temp_code)
|
|
{
|
|
const struct amlogic_thermal_soc_calib_data *param =
|
|
pdata->data->calibration_parameters;
|
|
int temp;
|
|
s64 factor, Uptat, uefuse;
|
|
|
|
uefuse = pdata->trim_info & TSENSOR_TRIM_SIGN_MASK ?
|
|
~(pdata->trim_info & TSENSOR_TRIM_TEMP_MASK) + 1 :
|
|
(pdata->trim_info & TSENSOR_TRIM_TEMP_MASK);
|
|
|
|
factor = param->n * temp_code;
|
|
factor = div_s64(factor, 100);
|
|
|
|
Uptat = temp_code * param->m;
|
|
Uptat = div_s64(Uptat, 100);
|
|
Uptat = Uptat * BIT(16);
|
|
Uptat = div_s64(Uptat, BIT(16) + factor);
|
|
|
|
temp = (Uptat + uefuse) * param->A;
|
|
temp = div_s64(temp, BIT(16));
|
|
temp = (temp - param->B) * 100;
|
|
|
|
return temp;
|
|
}
|
|
|
|
static int amlogic_thermal_initialize(struct amlogic_thermal *pdata)
|
|
{
|
|
int ret = 0;
|
|
int ver;
|
|
|
|
regmap_read(pdata->sec_ao_map, pdata->data->u_efuse_off,
|
|
&pdata->trim_info);
|
|
|
|
ver = TSENSOR_TRIM_VERSION(pdata->trim_info);
|
|
|
|
if ((ver & TSENSOR_TRIM_CALIB_VALID_MASK) == 0) {
|
|
ret = -EINVAL;
|
|
dev_err(&pdata->pdev->dev,
|
|
"tsensor thermal calibration not supported: 0x%x!\n",
|
|
ver);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int amlogic_thermal_enable(struct amlogic_thermal *data)
|
|
{
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(data->clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
regmap_update_bits(data->regmap, TSENSOR_CFG_REG1,
|
|
TSENSOR_CFG_REG1_ENABLE, TSENSOR_CFG_REG1_ENABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int amlogic_thermal_disable(struct amlogic_thermal *data)
|
|
{
|
|
regmap_update_bits(data->regmap, TSENSOR_CFG_REG1,
|
|
TSENSOR_CFG_REG1_ENABLE, 0);
|
|
clk_disable_unprepare(data->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int amlogic_thermal_get_temp(void *data, int *temp)
|
|
{
|
|
unsigned int tval;
|
|
struct amlogic_thermal *pdata = data;
|
|
|
|
if (!data)
|
|
return -EINVAL;
|
|
|
|
regmap_read(pdata->regmap, TSENSOR_STAT0, &tval);
|
|
*temp =
|
|
amlogic_thermal_code_to_millicelsius(pdata,
|
|
tval & TSENSOR_READ_TEMP_MASK);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct thermal_zone_of_device_ops amlogic_thermal_ops = {
|
|
.get_temp = amlogic_thermal_get_temp,
|
|
};
|
|
|
|
static const struct regmap_config amlogic_thermal_regmap_config_g12a = {
|
|
.reg_bits = 8,
|
|
.val_bits = 32,
|
|
.reg_stride = 4,
|
|
.max_register = TSENSOR_STAT9,
|
|
};
|
|
|
|
static const struct amlogic_thermal_soc_calib_data amlogic_thermal_g12a = {
|
|
.A = 9411,
|
|
.B = 3159,
|
|
.m = 424,
|
|
.n = 324,
|
|
};
|
|
|
|
static const struct amlogic_thermal_data amlogic_thermal_g12a_cpu_param = {
|
|
.u_efuse_off = 0x128,
|
|
.calibration_parameters = &amlogic_thermal_g12a,
|
|
.regmap_config = &amlogic_thermal_regmap_config_g12a,
|
|
};
|
|
|
|
static const struct amlogic_thermal_data amlogic_thermal_g12a_ddr_param = {
|
|
.u_efuse_off = 0xf0,
|
|
.calibration_parameters = &amlogic_thermal_g12a,
|
|
.regmap_config = &amlogic_thermal_regmap_config_g12a,
|
|
};
|
|
|
|
static const struct of_device_id of_amlogic_thermal_match[] = {
|
|
{
|
|
.compatible = "amlogic,g12a-ddr-thermal",
|
|
.data = &amlogic_thermal_g12a_ddr_param,
|
|
},
|
|
{
|
|
.compatible = "amlogic,g12a-cpu-thermal",
|
|
.data = &amlogic_thermal_g12a_cpu_param,
|
|
},
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, of_amlogic_thermal_match);
|
|
|
|
static int amlogic_thermal_probe(struct platform_device *pdev)
|
|
{
|
|
struct amlogic_thermal *pdata;
|
|
struct device *dev = &pdev->dev;
|
|
void __iomem *base;
|
|
int ret;
|
|
|
|
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata)
|
|
return -ENOMEM;
|
|
|
|
pdata->data = of_device_get_match_data(dev);
|
|
pdata->pdev = pdev;
|
|
platform_set_drvdata(pdev, pdata);
|
|
|
|
base = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(base))
|
|
return PTR_ERR(base);
|
|
|
|
pdata->regmap = devm_regmap_init_mmio(dev, base,
|
|
pdata->data->regmap_config);
|
|
if (IS_ERR(pdata->regmap))
|
|
return PTR_ERR(pdata->regmap);
|
|
|
|
pdata->clk = devm_clk_get(dev, NULL);
|
|
if (IS_ERR(pdata->clk)) {
|
|
if (PTR_ERR(pdata->clk) != -EPROBE_DEFER)
|
|
dev_err(dev, "failed to get clock\n");
|
|
return PTR_ERR(pdata->clk);
|
|
}
|
|
|
|
pdata->sec_ao_map = syscon_regmap_lookup_by_phandle
|
|
(pdev->dev.of_node, "amlogic,ao-secure");
|
|
if (IS_ERR(pdata->sec_ao_map)) {
|
|
dev_err(dev, "syscon regmap lookup failed.\n");
|
|
return PTR_ERR(pdata->sec_ao_map);
|
|
}
|
|
|
|
pdata->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev,
|
|
0,
|
|
pdata,
|
|
&amlogic_thermal_ops);
|
|
if (IS_ERR(pdata->tzd)) {
|
|
ret = PTR_ERR(pdata->tzd);
|
|
dev_err(dev, "Failed to register tsensor: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (devm_thermal_add_hwmon_sysfs(pdata->tzd))
|
|
dev_warn(&pdev->dev, "Failed to add hwmon sysfs attributes\n");
|
|
|
|
ret = amlogic_thermal_initialize(pdata);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = amlogic_thermal_enable(pdata);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int amlogic_thermal_remove(struct platform_device *pdev)
|
|
{
|
|
struct amlogic_thermal *data = platform_get_drvdata(pdev);
|
|
|
|
return amlogic_thermal_disable(data);
|
|
}
|
|
|
|
static int __maybe_unused amlogic_thermal_suspend(struct device *dev)
|
|
{
|
|
struct amlogic_thermal *data = dev_get_drvdata(dev);
|
|
|
|
return amlogic_thermal_disable(data);
|
|
}
|
|
|
|
static int __maybe_unused amlogic_thermal_resume(struct device *dev)
|
|
{
|
|
struct amlogic_thermal *data = dev_get_drvdata(dev);
|
|
|
|
return amlogic_thermal_enable(data);
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(amlogic_thermal_pm_ops,
|
|
amlogic_thermal_suspend, amlogic_thermal_resume);
|
|
|
|
static struct platform_driver amlogic_thermal_driver = {
|
|
.driver = {
|
|
.name = "amlogic_thermal",
|
|
.pm = &amlogic_thermal_pm_ops,
|
|
.of_match_table = of_amlogic_thermal_match,
|
|
},
|
|
.probe = amlogic_thermal_probe,
|
|
.remove = amlogic_thermal_remove,
|
|
};
|
|
|
|
module_platform_driver(amlogic_thermal_driver);
|
|
|
|
MODULE_AUTHOR("Guillaume La Roque <glaroque@baylibre.com>");
|
|
MODULE_DESCRIPTION("Amlogic thermal driver");
|
|
MODULE_LICENSE("GPL v2");
|