diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/mfd/max8925-i2c.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/mfd/max8925-i2c.c | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/ANDROID_3.4.5/drivers/mfd/max8925-i2c.c b/ANDROID_3.4.5/drivers/mfd/max8925-i2c.c deleted file mode 100644 index d9e4b36e..00000000 --- a/ANDROID_3.4.5/drivers/mfd/max8925-i2c.c +++ /dev/null @@ -1,236 +0,0 @@ -/* - * I2C driver for Maxim MAX8925 - * - * Copyright (C) 2009 Marvell International Ltd. - * Haojian Zhuang <haojian.zhuang@marvell.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/i2c.h> -#include <linux/mfd/max8925.h> -#include <linux/slab.h> - -#define RTC_I2C_ADDR 0x68 -#define ADC_I2C_ADDR 0x47 - -static inline int max8925_read_device(struct i2c_client *i2c, - int reg, int bytes, void *dest) -{ - int ret; - - if (bytes > 1) - ret = i2c_smbus_read_i2c_block_data(i2c, reg, bytes, dest); - else { - ret = i2c_smbus_read_byte_data(i2c, reg); - if (ret < 0) - return ret; - *(unsigned char *)dest = (unsigned char)ret; - } - return ret; -} - -static inline int max8925_write_device(struct i2c_client *i2c, - int reg, int bytes, void *src) -{ - unsigned char buf[bytes + 1]; - int ret; - - buf[0] = (unsigned char)reg; - memcpy(&buf[1], src, bytes); - - ret = i2c_master_send(i2c, buf, bytes + 1); - if (ret < 0) - return ret; - return 0; -} - -int max8925_reg_read(struct i2c_client *i2c, int reg) -{ - struct max8925_chip *chip = i2c_get_clientdata(i2c); - unsigned char data = 0; - int ret; - - mutex_lock(&chip->io_lock); - ret = max8925_read_device(i2c, reg, 1, &data); - mutex_unlock(&chip->io_lock); - - if (ret < 0) - return ret; - else - return (int)data; -} -EXPORT_SYMBOL(max8925_reg_read); - -int max8925_reg_write(struct i2c_client *i2c, int reg, - unsigned char data) -{ - struct max8925_chip *chip = i2c_get_clientdata(i2c); - int ret; - - mutex_lock(&chip->io_lock); - ret = max8925_write_device(i2c, reg, 1, &data); - mutex_unlock(&chip->io_lock); - - return ret; -} -EXPORT_SYMBOL(max8925_reg_write); - -int max8925_bulk_read(struct i2c_client *i2c, int reg, - int count, unsigned char *buf) -{ - struct max8925_chip *chip = i2c_get_clientdata(i2c); - int ret; - - mutex_lock(&chip->io_lock); - ret = max8925_read_device(i2c, reg, count, buf); - mutex_unlock(&chip->io_lock); - - return ret; -} -EXPORT_SYMBOL(max8925_bulk_read); - -int max8925_bulk_write(struct i2c_client *i2c, int reg, - int count, unsigned char *buf) -{ - struct max8925_chip *chip = i2c_get_clientdata(i2c); - int ret; - - mutex_lock(&chip->io_lock); - ret = max8925_write_device(i2c, reg, count, buf); - mutex_unlock(&chip->io_lock); - - return ret; -} -EXPORT_SYMBOL(max8925_bulk_write); - -int max8925_set_bits(struct i2c_client *i2c, int reg, - unsigned char mask, unsigned char data) -{ - struct max8925_chip *chip = i2c_get_clientdata(i2c); - unsigned char value; - int ret; - - mutex_lock(&chip->io_lock); - ret = max8925_read_device(i2c, reg, 1, &value); - if (ret < 0) - goto out; - value &= ~mask; - value |= data; - ret = max8925_write_device(i2c, reg, 1, &value); -out: - mutex_unlock(&chip->io_lock); - return ret; -} -EXPORT_SYMBOL(max8925_set_bits); - - -static const struct i2c_device_id max8925_id_table[] = { - { "max8925", 0 }, - { }, -}; -MODULE_DEVICE_TABLE(i2c, max8925_id_table); - -static int __devinit max8925_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct max8925_platform_data *pdata = client->dev.platform_data; - static struct max8925_chip *chip; - - if (!pdata) { - pr_info("%s: platform data is missing\n", __func__); - return -EINVAL; - } - - chip = kzalloc(sizeof(struct max8925_chip), GFP_KERNEL); - if (chip == NULL) - return -ENOMEM; - chip->i2c = client; - chip->dev = &client->dev; - i2c_set_clientdata(client, chip); - dev_set_drvdata(chip->dev, chip); - mutex_init(&chip->io_lock); - - chip->rtc = i2c_new_dummy(chip->i2c->adapter, RTC_I2C_ADDR); - i2c_set_clientdata(chip->rtc, chip); - - chip->adc = i2c_new_dummy(chip->i2c->adapter, ADC_I2C_ADDR); - i2c_set_clientdata(chip->adc, chip); - - device_init_wakeup(&client->dev, 1); - - max8925_device_init(chip, pdata); - - return 0; -} - -static int __devexit max8925_remove(struct i2c_client *client) -{ - struct max8925_chip *chip = i2c_get_clientdata(client); - - max8925_device_exit(chip); - i2c_unregister_device(chip->adc); - i2c_unregister_device(chip->rtc); - kfree(chip); - return 0; -} - -#ifdef CONFIG_PM_SLEEP -static int max8925_suspend(struct device *dev) -{ - struct i2c_client *client = container_of(dev, struct i2c_client, dev); - struct max8925_chip *chip = i2c_get_clientdata(client); - - if (device_may_wakeup(dev) && chip->wakeup_flag) - enable_irq_wake(chip->core_irq); - return 0; -} - -static int max8925_resume(struct device *dev) -{ - struct i2c_client *client = container_of(dev, struct i2c_client, dev); - struct max8925_chip *chip = i2c_get_clientdata(client); - - if (device_may_wakeup(dev) && chip->wakeup_flag) - disable_irq_wake(chip->core_irq); - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(max8925_pm_ops, max8925_suspend, max8925_resume); - -static struct i2c_driver max8925_driver = { - .driver = { - .name = "max8925", - .owner = THIS_MODULE, - .pm = &max8925_pm_ops, - }, - .probe = max8925_probe, - .remove = __devexit_p(max8925_remove), - .id_table = max8925_id_table, -}; - -static int __init max8925_i2c_init(void) -{ - int ret; - - ret = i2c_add_driver(&max8925_driver); - if (ret != 0) - pr_err("Failed to register MAX8925 I2C driver: %d\n", ret); - return ret; -} -subsys_initcall(max8925_i2c_init); - -static void __exit max8925_i2c_exit(void) -{ - i2c_del_driver(&max8925_driver); -} -module_exit(max8925_i2c_exit); - -MODULE_DESCRIPTION("I2C Driver for Maxim 8925"); -MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); -MODULE_LICENSE("GPL"); |