mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
b7b142d9fc
The driver still uses a custom cache implementation but the underlying physical I/O is now done using the regmap API, saving some code and avoiding allocating enormous scratch arrays on the stack. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
/*
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* wm8350-i2c.c -- Generic I2C driver for Wolfson WM8350 PMIC
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*
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* Copyright 2007, 2008 Wolfson Microelectronics PLC.
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*
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* Author: Liam Girdwood
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* linux@wolfsonmicro.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/wm8350/core.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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static const struct regmap_config wm8350_regmap = {
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.reg_bits = 8,
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.val_bits = 16,
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};
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static int wm8350_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct wm8350 *wm8350;
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int ret = 0;
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wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL);
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if (wm8350 == NULL)
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return -ENOMEM;
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wm8350->regmap = devm_regmap_init_i2c(i2c, &wm8350_regmap);
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if (IS_ERR(wm8350->regmap)) {
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ret = PTR_ERR(wm8350->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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i2c_set_clientdata(i2c, wm8350);
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wm8350->dev = &i2c->dev;
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ret = wm8350_device_init(wm8350, i2c->irq, i2c->dev.platform_data);
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if (ret < 0)
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goto err;
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return ret;
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err:
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regmap_exit(wm8350->regmap);
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return ret;
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}
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static int wm8350_i2c_remove(struct i2c_client *i2c)
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{
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struct wm8350 *wm8350 = i2c_get_clientdata(i2c);
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wm8350_device_exit(wm8350);
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return 0;
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}
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static const struct i2c_device_id wm8350_i2c_id[] = {
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{ "wm8350", 0 },
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{ "wm8351", 0 },
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{ "wm8352", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id);
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static struct i2c_driver wm8350_i2c_driver = {
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.driver = {
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.name = "wm8350",
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.owner = THIS_MODULE,
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},
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.probe = wm8350_i2c_probe,
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.remove = wm8350_i2c_remove,
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.id_table = wm8350_i2c_id,
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};
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static int __init wm8350_i2c_init(void)
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{
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return i2c_add_driver(&wm8350_i2c_driver);
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}
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/* init early so consumer devices can complete system boot */
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subsys_initcall(wm8350_i2c_init);
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static void __exit wm8350_i2c_exit(void)
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{
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i2c_del_driver(&wm8350_i2c_driver);
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}
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module_exit(wm8350_i2c_exit);
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MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC");
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MODULE_LICENSE("GPL");
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