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