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/*
* Base driver for Maxim MAX8831
*
* Copyright (c) 2008-2012, NVIDIA Corporation.
*
* 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.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/mfd/max8831.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/err.h>
#include <linux/mfd/core.h>
enum chips { max8831 };
static const struct i2c_device_id max8831_id[] = {
{ "max8831", max8831 },
{},
};
MODULE_DEVICE_TABLE(i2c, max8831_id);
static const struct regmap_config max8831_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x3A,
};
static struct mfd_cell max8831_mfd_cells[] = {
[MAX8831_ID_LED1] = {
.name = "max8831_led_bl",
.id = MAX8831_ID_LED1,
},
[MAX8831_ID_LED2] = {
.name = "max8831_led_bl",
.id = MAX8831_ID_LED2,
},
[MAX8831_ID_LED3] = {
.name = "max8831_led_bl",
.id = MAX8831_ID_LED3,
},
[MAX8831_ID_LED4] = {
.name = "max8831_led_bl",
.id = MAX8831_ID_LED4,
},
[MAX8831_ID_LED5] = {
.name = "max8831_led_bl",
.id = MAX8831_ID_LED5,
},
[MAX8831_BL_LEDS] = {
.name = "max8831_display_bl",
.id = MAX8831_BL_LEDS,
},
};
static int max8831_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max8831_platform_data *pdata = client->dev.platform_data;
struct max8831_chip *chip;
struct max8831_subdev_info *subdev;
int ret;
int i;
chip = devm_kzalloc(&client->dev,
sizeof(struct max8831_chip), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
chip->client = client;
chip->dev = &client->dev;
i2c_set_clientdata(client, chip);
chip->regmap = devm_regmap_init_i2c(client, &max8831_regmap_config);
if (IS_ERR(chip->regmap)) {
ret = PTR_ERR(chip->regmap);
dev_err(&client->dev, "regmap init failed: %d\n", ret);
return ret;
}
for (i = 0; i < pdata->num_subdevs; i++) {
subdev = &pdata->subdevs[i];
max8831_mfd_cells[subdev->id].platform_data =
subdev->platform_data;
max8831_mfd_cells[subdev->id].pdata_size = subdev->pdata_size;
}
ret = mfd_add_devices(chip->dev, 0,
max8831_mfd_cells, ARRAY_SIZE(max8831_mfd_cells),
NULL, 0, NULL);
if (ret < 0)
goto failed;
return 0;
failed:
mfd_remove_devices(chip->dev);
return ret;
}
static int max8831_remove(struct i2c_client *client)
{
struct max8831_chip *chip = i2c_get_clientdata(client);
mfd_remove_devices(chip->dev);
return 0;
}
static struct i2c_driver max8831_driver = {
.driver = {
.name = "max8831",
.owner = THIS_MODULE,
},
.probe = max8831_probe,
.remove = max8831_remove,
.id_table = max8831_id,
};
module_i2c_driver(max8831_driver);
MODULE_AUTHOR("Chaitanya Bandi<bandik@nvidia.com>");
MODULE_DESCRIPTION("MAX8831 MFD driver");
MODULE_LICENSE("GPL v2");
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