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drivers/mfd/s5m-core.c
4.08 KB
0f5f70783 mfd: Add S5M core... |
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/* * s5m87xx.c * * Copyright (c) 2011 Samsung Electronics Co., Ltd * http://www.samsung.com * * 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. * */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/pm_runtime.h> #include <linux/mutex.h> #include <linux/mfd/core.h> #include <linux/mfd/s5m87xx/s5m-core.h> #include <linux/mfd/s5m87xx/s5m-pmic.h> #include <linux/mfd/s5m87xx/s5m-rtc.h> #include <linux/regmap.h> static struct mfd_cell s5m87xx_devs[] = { { .name = "s5m8767-pmic", }, { .name = "s5m-rtc", }, }; int s5m_reg_read(struct s5m87xx_dev *s5m87xx, u8 reg, void *dest) { return regmap_read(s5m87xx->regmap, reg, dest); } EXPORT_SYMBOL_GPL(s5m_reg_read); int s5m_bulk_read(struct s5m87xx_dev *s5m87xx, u8 reg, int count, u8 *buf) { return regmap_bulk_read(s5m87xx->regmap, reg, buf, count);; } EXPORT_SYMBOL_GPL(s5m_bulk_read); int s5m_reg_write(struct s5m87xx_dev *s5m87xx, u8 reg, u8 value) { return regmap_write(s5m87xx->regmap, reg, value); } EXPORT_SYMBOL_GPL(s5m_reg_write); int s5m_bulk_write(struct s5m87xx_dev *s5m87xx, u8 reg, int count, u8 *buf) { return regmap_raw_write(s5m87xx->regmap, reg, buf, count * sizeof(u16)); } EXPORT_SYMBOL_GPL(s5m_bulk_write); int s5m_reg_update(struct s5m87xx_dev *s5m87xx, u8 reg, u8 val, u8 mask) { return regmap_update_bits(s5m87xx->regmap, reg, mask, val); } EXPORT_SYMBOL_GPL(s5m_reg_update); static struct regmap_config s5m_regmap_config = { .reg_bits = 8, .val_bits = 8, }; static int s5m87xx_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct s5m_platform_data *pdata = i2c->dev.platform_data; struct s5m87xx_dev *s5m87xx; int ret = 0; int error; s5m87xx = kzalloc(sizeof(struct s5m87xx_dev), GFP_KERNEL); if (s5m87xx == NULL) return -ENOMEM; i2c_set_clientdata(i2c, s5m87xx); s5m87xx->dev = &i2c->dev; s5m87xx->i2c = i2c; s5m87xx->irq = i2c->irq; s5m87xx->type = id->driver_data; if (pdata) { s5m87xx->device_type = pdata->device_type; s5m87xx->ono = pdata->ono; s5m87xx->irq_base = pdata->irq_base; s5m87xx->wakeup = pdata->wakeup; } s5m87xx->regmap = regmap_init_i2c(i2c, &s5m_regmap_config); if (IS_ERR(s5m87xx->regmap)) { error = PTR_ERR(s5m87xx->regmap); dev_err(&i2c->dev, "Failed to allocate register map: %d ", error); goto err; } s5m87xx->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); i2c_set_clientdata(s5m87xx->rtc, s5m87xx); if (pdata->cfg_pmic_irq) pdata->cfg_pmic_irq(); s5m_irq_init(s5m87xx); pm_runtime_set_active(s5m87xx->dev); ret = mfd_add_devices(s5m87xx->dev, -1, s5m87xx_devs, ARRAY_SIZE(s5m87xx_devs), NULL, 0); if (ret < 0) goto err; return ret; err: mfd_remove_devices(s5m87xx->dev); s5m_irq_exit(s5m87xx); i2c_unregister_device(s5m87xx->rtc); regmap_exit(s5m87xx->regmap); kfree(s5m87xx); return ret; } static int s5m87xx_i2c_remove(struct i2c_client *i2c) { struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c); mfd_remove_devices(s5m87xx->dev); s5m_irq_exit(s5m87xx); i2c_unregister_device(s5m87xx->rtc); regmap_exit(s5m87xx->regmap); kfree(s5m87xx); return 0; } static const struct i2c_device_id s5m87xx_i2c_id[] = { { "s5m87xx", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, s5m87xx_i2c_id); static struct i2c_driver s5m87xx_i2c_driver = { .driver = { .name = "s5m87xx", .owner = THIS_MODULE, }, .probe = s5m87xx_i2c_probe, .remove = s5m87xx_i2c_remove, .id_table = s5m87xx_i2c_id, }; static int __init s5m87xx_i2c_init(void) { return i2c_add_driver(&s5m87xx_i2c_driver); } subsys_initcall(s5m87xx_i2c_init); static void __exit s5m87xx_i2c_exit(void) { i2c_del_driver(&s5m87xx_i2c_driver); } module_exit(s5m87xx_i2c_exit); MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); MODULE_DESCRIPTION("Core support for the S5M MFD"); MODULE_LICENSE("GPL"); |