177 строки
4.1 KiB
C
177 строки
4.1 KiB
C
/*
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* s5m87xx.c
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd
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* http://www.samsung.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/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/pm_runtime.h>
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#include <linux/mutex.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/s5m87xx/s5m-core.h>
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#include <linux/mfd/s5m87xx/s5m-pmic.h>
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#include <linux/mfd/s5m87xx/s5m-rtc.h>
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#include <linux/regmap.h>
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static struct mfd_cell s5m87xx_devs[] = {
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{
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.name = "s5m8767-pmic",
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}, {
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.name = "s5m-rtc",
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},
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};
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int s5m_reg_read(struct s5m87xx_dev *s5m87xx, u8 reg, void *dest)
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{
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return regmap_read(s5m87xx->regmap, reg, dest);
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}
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EXPORT_SYMBOL_GPL(s5m_reg_read);
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int s5m_bulk_read(struct s5m87xx_dev *s5m87xx, u8 reg, int count, u8 *buf)
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{
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return regmap_bulk_read(s5m87xx->regmap, reg, buf, count);;
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}
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EXPORT_SYMBOL_GPL(s5m_bulk_read);
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int s5m_reg_write(struct s5m87xx_dev *s5m87xx, u8 reg, u8 value)
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{
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return regmap_write(s5m87xx->regmap, reg, value);
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}
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EXPORT_SYMBOL_GPL(s5m_reg_write);
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int s5m_bulk_write(struct s5m87xx_dev *s5m87xx, u8 reg, int count, u8 *buf)
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{
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return regmap_raw_write(s5m87xx->regmap, reg, buf, count * sizeof(u16));
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}
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EXPORT_SYMBOL_GPL(s5m_bulk_write);
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int s5m_reg_update(struct s5m87xx_dev *s5m87xx, u8 reg, u8 val, u8 mask)
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{
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return regmap_update_bits(s5m87xx->regmap, reg, mask, val);
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}
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EXPORT_SYMBOL_GPL(s5m_reg_update);
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static struct regmap_config s5m_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static int s5m87xx_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 s5m_platform_data *pdata = i2c->dev.platform_data;
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struct s5m87xx_dev *s5m87xx;
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int ret = 0;
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int error;
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s5m87xx = kzalloc(sizeof(struct s5m87xx_dev), GFP_KERNEL);
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if (s5m87xx == NULL)
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return -ENOMEM;
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i2c_set_clientdata(i2c, s5m87xx);
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s5m87xx->dev = &i2c->dev;
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s5m87xx->i2c = i2c;
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s5m87xx->irq = i2c->irq;
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s5m87xx->type = id->driver_data;
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if (pdata) {
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s5m87xx->device_type = pdata->device_type;
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s5m87xx->ono = pdata->ono;
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s5m87xx->irq_base = pdata->irq_base;
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s5m87xx->wakeup = pdata->wakeup;
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}
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s5m87xx->regmap = regmap_init_i2c(i2c, &s5m_regmap_config);
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if (IS_ERR(s5m87xx->regmap)) {
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error = PTR_ERR(s5m87xx->regmap);
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dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
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error);
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goto err;
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}
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s5m87xx->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
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i2c_set_clientdata(s5m87xx->rtc, s5m87xx);
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if (pdata && pdata->cfg_pmic_irq)
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pdata->cfg_pmic_irq();
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s5m_irq_init(s5m87xx);
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pm_runtime_set_active(s5m87xx->dev);
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ret = mfd_add_devices(s5m87xx->dev, -1,
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s5m87xx_devs, ARRAY_SIZE(s5m87xx_devs),
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NULL, 0);
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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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mfd_remove_devices(s5m87xx->dev);
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s5m_irq_exit(s5m87xx);
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i2c_unregister_device(s5m87xx->rtc);
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regmap_exit(s5m87xx->regmap);
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kfree(s5m87xx);
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return ret;
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}
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static int s5m87xx_i2c_remove(struct i2c_client *i2c)
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{
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struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
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mfd_remove_devices(s5m87xx->dev);
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s5m_irq_exit(s5m87xx);
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i2c_unregister_device(s5m87xx->rtc);
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regmap_exit(s5m87xx->regmap);
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kfree(s5m87xx);
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return 0;
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}
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static const struct i2c_device_id s5m87xx_i2c_id[] = {
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{ "s5m87xx", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, s5m87xx_i2c_id);
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static struct i2c_driver s5m87xx_i2c_driver = {
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.driver = {
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.name = "s5m87xx",
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.owner = THIS_MODULE,
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},
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.probe = s5m87xx_i2c_probe,
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.remove = s5m87xx_i2c_remove,
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.id_table = s5m87xx_i2c_id,
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};
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static int __init s5m87xx_i2c_init(void)
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{
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return i2c_add_driver(&s5m87xx_i2c_driver);
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}
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subsys_initcall(s5m87xx_i2c_init);
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static void __exit s5m87xx_i2c_exit(void)
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{
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i2c_del_driver(&s5m87xx_i2c_driver);
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}
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module_exit(s5m87xx_i2c_exit);
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MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
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MODULE_DESCRIPTION("Core support for the S5M MFD");
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MODULE_LICENSE("GPL");
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