LXR linux/drivers/mfd/sky81452.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * sky81452.c   SKY81452 MFD driver
   4 *
   5 * Copyright 2014 Skyworks Solutions Inc.
   6 * Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
   7 */
   8
   9#include <linux/kernel.h>
  10#include <linux/module.h>
  11#include <linux/init.h>
  12#include <linux/err.h>
  13#include <linux/slab.h>
  14#include <linux/i2c.h>
  15#include <linux/regmap.h>
  16#include <linux/mfd/core.h>
  17#include <linux/mfd/sky81452.h>
  18
  19static const struct regmap_config sky81452_config = {
  20        .reg_bits = 8,
  21        .val_bits = 8,
  22};
  23
  24static int sky81452_probe(struct i2c_client *client,
  25                                const struct i2c_device_id *id)
  26{
  27        struct device *dev = &client->dev;
  28        const struct sky81452_platform_data *pdata = dev_get_platdata(dev);
  29        struct mfd_cell cells[2];
  30        struct regmap *regmap;
  31        int ret;
  32
  33        if (!pdata) {
  34                pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
  35                if (!pdata)
  36                        return -ENOMEM;
  37        }
  38
  39        regmap = devm_regmap_init_i2c(client, &sky81452_config);
  40        if (IS_ERR(regmap)) {
  41                dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap));
  42                return PTR_ERR(regmap);
  43        }
  44
  45        i2c_set_clientdata(client, regmap);
  46
  47        memset(cells, 0, sizeof(cells));
  48        cells[0].name = "sky81452-backlight";
  49        cells[0].of_compatible = "skyworks,sky81452-backlight";
  50        cells[1].name = "sky81452-regulator";
  51        cells[1].platform_data = pdata->regulator_init_data;
  52        cells[1].pdata_size = sizeof(*pdata->regulator_init_data);
  53
  54        ret = devm_mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells),
  55                                   NULL, 0, NULL);
  56        if (ret)
  57                dev_err(dev, "failed to add child devices. err=%d\n", ret);
  58
  59        return ret;
  60}
  61
  62static const struct i2c_device_id sky81452_ids[] = {
  63        { "sky81452" },
  64        { }
  65};
  66MODULE_DEVICE_TABLE(i2c, sky81452_ids);
  67
  68#ifdef CONFIG_OF
  69static const struct of_device_id sky81452_of_match[] = {
  70        { .compatible = "skyworks,sky81452", },
  71        { }
  72};
  73MODULE_DEVICE_TABLE(of, sky81452_of_match);
  74#endif
  75
  76static struct i2c_driver sky81452_driver = {
  77        .driver = {
  78                .name = "sky81452",
  79                .of_match_table = of_match_ptr(sky81452_of_match),
  80        },
  81        .probe = sky81452_probe,
  82        .id_table = sky81452_ids,
  83};
  84
  85module_i2c_driver(sky81452_driver);
  86
  87MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
  88MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
  89MODULE_LICENSE("GPL v2");
  90