99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* TPS68470 chip Parent driver
|
||
|
|
*
|
||
|
|
* Copyright (C) 2017 Intel Corporation
|
||
|
|
*
|
||
|
|
* Authors:
|
||
|
|
* Rajmohan Mani <rajmohan.mani@intel.com>
|
||
|
|
* Tianshu Qiu <tian.shu.qiu@intel.com>
|
||
|
|
* Jian Xu Zheng <jian.xu.zheng@intel.com>
|
||
|
|
* Yuning Pu <yuning.pu@intel.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/acpi.h>
|
||
|
|
#include <linux/delay.h>
|
||
|
|
#include <linux/i2c.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/mfd/core.h>
|
||
|
|
#include <linux/mfd/tps68470.h>
|
||
|
|
#include <linux/regmap.h>
|
||
|
|
|
||
|
|
static const struct mfd_cell tps68470s[] = {
|
||
|
|
{ .name = "tps68470-gpio" },
|
||
|
|
{ .name = "tps68470_pmic_opregion" },
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct regmap_config tps68470_regmap_config = {
|
||
|
|
.reg_bits = 8,
|
||
|
|
.val_bits = 8,
|
||
|
|
.max_register = TPS68470_REG_MAX,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int tps68470_chip_init(struct device *dev, struct regmap *regmap)
|
||
|
|
{
|
||
|
|
unsigned int version;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* Force software reset */
|
||
|
|
ret = regmap_write(regmap, TPS68470_REG_RESET, TPS68470_REG_RESET_MASK);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ret = regmap_read(regmap, TPS68470_REG_REVID, &version);
|
||
|
|
if (ret) {
|
||
|
|
dev_err(dev, "Failed to read revision register: %d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_info(dev, "TPS68470 REVID: 0x%x\n", version);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int tps68470_probe(struct i2c_client *client)
|
||
|
|
{
|
||
|
|
struct device *dev = &client->dev;
|
||
|
|
struct regmap *regmap;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config);
|
||
|
|
if (IS_ERR(regmap)) {
|
||
|
|
dev_err(dev, "devm_regmap_init_i2c Error %ld\n",
|
||
|
|
PTR_ERR(regmap));
|
||
|
|
return PTR_ERR(regmap);
|
||
|
|
}
|
||
|
|
|
||
|
|
i2c_set_clientdata(client, regmap);
|
||
|
|
|
||
|
|
ret = tps68470_chip_init(dev, regmap);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(dev, "TPS68470 Init Error %d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, tps68470s,
|
||
|
|
ARRAY_SIZE(tps68470s), NULL, 0, NULL);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(dev, "devm_mfd_add_devices failed: %d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct acpi_device_id tps68470_acpi_ids[] = {
|
||
|
|
{"INT3472"},
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(acpi, tps68470_acpi_ids);
|
||
|
|
|
||
|
|
static struct i2c_driver tps68470_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "tps68470",
|
||
|
|
.acpi_match_table = tps68470_acpi_ids,
|
||
|
|
},
|
||
|
|
.probe_new = tps68470_probe,
|
||
|
|
};
|
||
|
|
builtin_i2c_driver(tps68470_driver);
|