109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/*
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* sky81452.c SKY81452 MFD driver
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*
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* Copyright 2014 Skyworks Solutions Inc.
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* Author : Gyungoh Yoo <jack.yoo@skyworksinc.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 version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/kernel.h>
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#include <linux/module.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/regmap.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/sky81452.h>
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static const struct regmap_config sky81452_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 sky81452_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct device *dev = &client->dev;
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const struct sky81452_platform_data *pdata = dev_get_platdata(dev);
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struct mfd_cell cells[2];
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struct regmap *regmap;
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int ret;
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if (!pdata) {
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pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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}
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regmap = devm_regmap_init_i2c(client, &sky81452_config);
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if (IS_ERR(regmap)) {
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dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap));
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return PTR_ERR(regmap);
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}
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i2c_set_clientdata(client, regmap);
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memset(cells, 0, sizeof(cells));
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cells[0].name = "sky81452-backlight";
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cells[0].of_compatible = "skyworks,sky81452-backlight";
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cells[0].platform_data = pdata->bl_pdata;
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cells[0].pdata_size = sizeof(*pdata->bl_pdata);
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cells[1].name = "sky81452-regulator";
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cells[1].platform_data = pdata->regulator_init_data;
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cells[1].pdata_size = sizeof(*pdata->regulator_init_data);
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ret = mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells), NULL, 0, NULL);
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if (ret)
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dev_err(dev, "failed to add child devices. err=%d\n", ret);
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return ret;
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}
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static int sky81452_remove(struct i2c_client *client)
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{
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mfd_remove_devices(&client->dev);
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return 0;
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}
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static const struct i2c_device_id sky81452_ids[] = {
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{ "sky81452" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, sky81452_ids);
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#ifdef CONFIG_OF
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static const struct of_device_id sky81452_of_match[] = {
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{ .compatible = "skyworks,sky81452", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, sky81452_of_match);
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#endif
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static struct i2c_driver sky81452_driver = {
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.driver = {
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.name = "sky81452",
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.of_match_table = of_match_ptr(sky81452_of_match),
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},
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.probe = sky81452_probe,
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.remove = sky81452_remove,
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.id_table = sky81452_ids,
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};
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module_i2c_driver(sky81452_driver);
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MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
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MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
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MODULE_LICENSE("GPL v2");
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