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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /drivers/mfd/da9052-i2c.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'drivers/mfd/da9052-i2c.c')
-rw-r--r-- | drivers/mfd/da9052-i2c.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/mfd/da9052-i2c.c b/drivers/mfd/da9052-i2c.c new file mode 100644 index 00000000..36b88e39 --- /dev/null +++ b/drivers/mfd/da9052-i2c.c @@ -0,0 +1,143 @@ +/* + * I2C access for DA9052 PMICs. + * + * Copyright(c) 2011 Dialog Semiconductor Ltd. + * + * Author: David Dajun Chen <dchen@diasemi.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/device.h> +#include <linux/module.h> +#include <linux/input.h> +#include <linux/mfd/core.h> +#include <linux/i2c.h> +#include <linux/err.h> + +#include <linux/mfd/da9052/da9052.h> +#include <linux/mfd/da9052/reg.h> + +static int da9052_i2c_enable_multiwrite(struct da9052 *da9052) +{ + int reg_val, ret; + + ret = regmap_read(da9052->regmap, DA9052_CONTROL_B_REG, ®_val); + if (ret < 0) + return ret; + + if (reg_val & DA9052_CONTROL_B_WRITEMODE) { + reg_val &= ~DA9052_CONTROL_B_WRITEMODE; + ret = regmap_write(da9052->regmap, DA9052_CONTROL_B_REG, + reg_val); + if (ret < 0) + return ret; + } + + return 0; +} + +static int __devinit da9052_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct da9052 *da9052; + int ret; + + da9052 = kzalloc(sizeof(struct da9052), GFP_KERNEL); + if (!da9052) + return -ENOMEM; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_info(&client->dev, "Error in %s:i2c_check_functionality\n", + __func__); + ret = -ENODEV; + goto err; + } + + da9052->dev = &client->dev; + da9052->chip_irq = client->irq; + + i2c_set_clientdata(client, da9052); + + da9052->regmap = regmap_init_i2c(client, &da9052_regmap_config); + if (IS_ERR(da9052->regmap)) { + ret = PTR_ERR(da9052->regmap); + dev_err(&client->dev, "Failed to allocate register map: %d\n", + ret); + goto err; + } + + ret = da9052_i2c_enable_multiwrite(da9052); + if (ret < 0) + goto err_regmap; + + ret = da9052_device_init(da9052, id->driver_data); + if (ret != 0) + goto err_regmap; + + return 0; + +err_regmap: + regmap_exit(da9052->regmap); +err: + kfree(da9052); + return ret; +} + +static int __devexit da9052_i2c_remove(struct i2c_client *client) +{ + struct da9052 *da9052 = i2c_get_clientdata(client); + + da9052_device_exit(da9052); + regmap_exit(da9052->regmap); + kfree(da9052); + + return 0; +} + +static struct i2c_device_id da9052_i2c_id[] = { + {"da9052", DA9052}, + {"da9053-aa", DA9053_AA}, + {"da9053-ba", DA9053_BA}, + {"da9053-bb", DA9053_BB}, + {} +}; + +static struct i2c_driver da9052_i2c_driver = { + .probe = da9052_i2c_probe, + .remove = __devexit_p(da9052_i2c_remove), + .id_table = da9052_i2c_id, + .driver = { + .name = "da9052", + .owner = THIS_MODULE, + }, +}; + +static int __init da9052_i2c_init(void) +{ + int ret; + + ret = i2c_add_driver(&da9052_i2c_driver); + if (ret != 0) { + pr_err("DA9052 I2C registration failed %d\n", ret); + return ret; + } + + return 0; +} +subsys_initcall(da9052_i2c_init); + +static void __exit da9052_i2c_exit(void) +{ + i2c_del_driver(&da9052_i2c_driver); +} +module_exit(da9052_i2c_exit); + +MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); +MODULE_DESCRIPTION("I2C driver for Dialog DA9052 PMIC"); +MODULE_LICENSE("GPL"); |