1df5981b82
Factor out the register read/write code to use the register map API. We still need some wm831x specific code and locking in place to check that the user key is handled correctly but only on the write side, reads are not affected by the key. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com>
112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
/*
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* wm831x-i2c.c -- I2C access for Wolfson WM831x PMICs
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*
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* Copyright 2009,2010 Wolfson Microelectronics PLC.
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*
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* Author: Mark Brown <broonie@opensource.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/kernel.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/delay.h>
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#include <linux/mfd/core.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/regmap.h>
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#include <linux/mfd/wm831x/core.h>
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#include <linux/mfd/wm831x/pdata.h>
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static int wm831x_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 wm831x *wm831x;
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int ret;
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wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
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if (wm831x == NULL)
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return -ENOMEM;
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i2c_set_clientdata(i2c, wm831x);
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wm831x->dev = &i2c->dev;
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wm831x->regmap = regmap_init_i2c(i2c, &wm831x_regmap_config);
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if (IS_ERR(wm831x->regmap)) {
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ret = PTR_ERR(wm831x->regmap);
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dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
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ret);
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kfree(wm831x);
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return ret;
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}
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return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
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}
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static int wm831x_i2c_remove(struct i2c_client *i2c)
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{
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struct wm831x *wm831x = i2c_get_clientdata(i2c);
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wm831x_device_exit(wm831x);
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return 0;
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}
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static int wm831x_i2c_suspend(struct device *dev)
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{
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struct wm831x *wm831x = dev_get_drvdata(dev);
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return wm831x_device_suspend(wm831x);
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}
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static const struct i2c_device_id wm831x_i2c_id[] = {
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{ "wm8310", WM8310 },
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{ "wm8311", WM8311 },
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{ "wm8312", WM8312 },
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{ "wm8320", WM8320 },
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{ "wm8321", WM8321 },
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{ "wm8325", WM8325 },
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{ "wm8326", WM8326 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
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static const struct dev_pm_ops wm831x_pm_ops = {
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.suspend = wm831x_i2c_suspend,
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};
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static struct i2c_driver wm831x_i2c_driver = {
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.driver = {
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.name = "wm831x",
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.owner = THIS_MODULE,
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.pm = &wm831x_pm_ops,
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},
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.probe = wm831x_i2c_probe,
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.remove = wm831x_i2c_remove,
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.id_table = wm831x_i2c_id,
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};
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static int __init wm831x_i2c_init(void)
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{
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int ret;
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ret = i2c_add_driver(&wm831x_i2c_driver);
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if (ret != 0)
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pr_err("Failed to register wm831x I2C driver: %d\n", ret);
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return ret;
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}
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subsys_initcall(wm831x_i2c_init);
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static void __exit wm831x_i2c_exit(void)
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{
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i2c_del_driver(&wm831x_i2c_driver);
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}
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module_exit(wm831x_i2c_exit);
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