2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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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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#include <linux/kernel.h>
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#include <linux/init.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/of.h>
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#include <linux/of_device.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_pdata *pdata = dev_get_platdata(&i2c->dev);
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const struct of_device_id *of_id;
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struct wm831x *wm831x;
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enum wm831x_parent type;
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int ret;
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if (i2c->dev.of_node) {
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of_id = of_match_device(wm831x_of_match, &i2c->dev);
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if (!of_id) {
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dev_err(&i2c->dev, "Failed to match device\n");
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return -ENODEV;
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}
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type = (enum wm831x_parent)of_id->data;
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} else {
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type = (enum wm831x_parent)id->driver_data;
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}
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wm831x = devm_kzalloc(&i2c->dev, 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->type = type;
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wm831x->regmap = devm_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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return ret;
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}
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if (pdata)
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memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
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return wm831x_device_init(wm831x, i2c->irq);
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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 int wm831x_i2c_poweroff(struct device *dev)
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{
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struct wm831x *wm831x = dev_get_drvdata(dev);
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wm831x_device_shutdown(wm831x);
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return 0;
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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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static const struct dev_pm_ops wm831x_pm_ops = {
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.suspend = wm831x_i2c_suspend,
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.poweroff = wm831x_i2c_poweroff,
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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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.pm = &wm831x_pm_ops,
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.of_match_table = of_match_ptr(wm831x_of_match),
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.suppress_bind_attrs = true,
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},
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.probe = wm831x_i2c_probe,
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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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