mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 03:10:52 +07:00
141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* apw8889-i2c.c - Anpec APW8889 PMIC I2C driver
|
|
*
|
|
* Copyright (C) 2018-2019 Realtek Semiconductor Corporation
|
|
* Author: Cheng-Yu Lee <cylee12@realtek.com>
|
|
*/
|
|
|
|
#include <linux/i2c.h>
|
|
#include <linux/module.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/mfd/apw888x.h>
|
|
#include <linux/mfd/apw8889.h>
|
|
|
|
static bool apw8889_regmap_readable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case APW8889_REG_INTR ... APW8889_REG_PWRKEY:
|
|
case APW8889_REG_SYS_CONTROL ... APW8889_REG_LDO1_SLPVOLT:
|
|
case APW8889_REG_CLAMP:
|
|
case APW8889_REG_CHIP_ID:
|
|
case APW8889_REG_VERSION:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool apw8889_regmap_writeable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case APW8889_REG_INTR_MASK ... APW8889_REG_PWRKEY:
|
|
case APW8889_REG_SYS_CONTROL ... APW8889_REG_LDO1_SLPVOLT:
|
|
case APW8889_REG_CLAMP:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool apw8889_regmap_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case APW8889_REG_INTR_MASK ... APW8889_REG_PWRKEY:
|
|
case APW8889_REG_SYS_CONTROL:
|
|
case APW8889_REG_CLAMP:
|
|
case APW8889_REG_CHIP_ID:
|
|
case APW8889_REG_VERSION:
|
|
case APW8889_REG_DC1DC2_MODE ... APW8889_REG_DC5DC6_MODE:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static const struct regmap_config apw8889_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = 0x1F,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
.readable_reg = apw8889_regmap_readable_reg,
|
|
.writeable_reg = apw8889_regmap_writeable_reg,
|
|
.volatile_reg = apw8889_regmap_volatile_reg,
|
|
};
|
|
|
|
static int apw8889_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct apw888x_device *adev;
|
|
int ret;
|
|
u32 chip_id, rev;
|
|
|
|
adev = devm_kzalloc(dev, sizeof(*adev), GFP_KERNEL);
|
|
if (!adev)
|
|
return -ENOMEM;
|
|
|
|
adev->regmap = devm_regmap_init_i2c(client, &apw8889_regmap_config);
|
|
if (IS_ERR(adev->regmap))
|
|
return PTR_ERR(adev->regmap);
|
|
|
|
/* show chip info */
|
|
ret = regmap_read(adev->regmap, APW8889_REG_CHIP_ID, &chip_id);
|
|
if (ret) {
|
|
dev_err(dev, "failed to read chip_id: %d\n", ret);
|
|
return ret;
|
|
}
|
|
if (chip_id != 0x5a) {
|
|
dev_err(dev, "chip_id(%02x) not match\n", chip_id);
|
|
return -EINVAL;
|
|
}
|
|
regmap_read(adev->regmap, APW8889_REG_VERSION, &rev);
|
|
dev_info(dev, "apw8889(%02x) rev%d\n", chip_id, rev);
|
|
|
|
|
|
adev->chip_id = APW888X_DEVICE_ID_APW8889;
|
|
adev->chip_rev = rev;
|
|
adev->dev = dev;
|
|
i2c_set_clientdata(client, adev);
|
|
|
|
ret = apw888x_device_init(adev);
|
|
if (ret) {
|
|
dev_err(dev, "failed to add sub-devices: %d\n", ret);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int apw8889_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct apw888x_device *adev = i2c_get_clientdata(client);
|
|
|
|
apw888x_device_exit(adev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id apw8889_of_match[] = {
|
|
{ .compatible = "anpec,apw8889", },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, apw8889_of_match);
|
|
|
|
static const struct i2c_device_id apw8889_i2c_ids[] = {
|
|
{"apw8889", 0},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, apw8889_i2c_ids);
|
|
|
|
static struct i2c_driver apw8889_i2c_driver = {
|
|
.driver = {
|
|
.name = "apw8889",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(apw8889_of_match),
|
|
},
|
|
.id_table = apw8889_i2c_ids,
|
|
.probe = apw8889_i2c_probe,
|
|
.remove = apw8889_i2c_remove,
|
|
};
|
|
module_i2c_driver(apw8889_i2c_driver);
|
|
|
|
MODULE_DESCRIPTION("Anpec APW8889 PMIC MFD Driver");
|
|
MODULE_AUTHOR("Cheng-Yu Lee <cylee12@realtek.com>");
|
|
MODULE_LICENSE("GPL v2");
|