99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* I2C access for DA9055 PMICs.
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*
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* Copyright(c) 2012 Dialog Semiconductor Ltd.
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*
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* Author: David Dajun Chen <dchen@diasemi.com>
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*/
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/i2c.h>
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/mfd/da9055/core.h>
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static int da9055_i2c_probe(struct i2c_client *i2c)
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{
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struct da9055 *da9055;
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int ret;
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da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
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if (!da9055)
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return -ENOMEM;
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da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
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if (IS_ERR(da9055->regmap)) {
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ret = PTR_ERR(da9055->regmap);
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dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
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ret);
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return ret;
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}
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da9055->dev = &i2c->dev;
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da9055->chip_irq = i2c->irq;
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i2c_set_clientdata(i2c, da9055);
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return da9055_device_init(da9055);
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}
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static void da9055_i2c_remove(struct i2c_client *i2c)
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{
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struct da9055 *da9055 = i2c_get_clientdata(i2c);
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da9055_device_exit(da9055);
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}
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/*
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* DO NOT change the device Ids. The naming is intentionally specific as both
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* the PMIC and CODEC parts of this chip are instantiated separately as I2C
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* devices (both have configurable I2C addresses, and are to all intents and
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* purposes separate). As a result there are specific DA9055 ids for PMIC
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* and CODEC, which must be different to operate together.
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*/
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static const struct i2c_device_id da9055_i2c_id[] = {
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{"da9055-pmic", 0},
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
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static const struct of_device_id da9055_of_match[] = {
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{ .compatible = "dlg,da9055-pmic", },
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{ }
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};
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static struct i2c_driver da9055_i2c_driver = {
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.probe = da9055_i2c_probe,
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.remove = da9055_i2c_remove,
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.id_table = da9055_i2c_id,
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.driver = {
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.name = "da9055-pmic",
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.of_match_table = da9055_of_match,
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},
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};
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static int __init da9055_i2c_init(void)
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{
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int ret;
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ret = i2c_add_driver(&da9055_i2c_driver);
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if (ret != 0) {
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pr_err("DA9055 I2C registration failed %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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subsys_initcall(da9055_i2c_init);
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static void __exit da9055_i2c_exit(void)
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{
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i2c_del_driver(&da9055_i2c_driver);
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}
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module_exit(da9055_i2c_exit);
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MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
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MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
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