89 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * sky81452.c SKY81452 MFD driver4 *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{26 struct device *dev = &client->dev;27 const struct sky81452_platform_data *pdata = dev_get_platdata(dev);28 struct mfd_cell cells[2];29 struct regmap *regmap;30 int ret;31 32 if (!pdata) {33 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);34 if (!pdata)35 return -ENOMEM;36 }37 38 regmap = devm_regmap_init_i2c(client, &sky81452_config);39 if (IS_ERR(regmap)) {40 dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap));41 return PTR_ERR(regmap);42 }43 44 i2c_set_clientdata(client, regmap);45 46 memset(cells, 0, sizeof(cells));47 cells[0].name = "sky81452-backlight";48 cells[0].of_compatible = "skyworks,sky81452-backlight";49 cells[1].name = "sky81452-regulator";50 cells[1].platform_data = pdata->regulator_init_data;51 cells[1].pdata_size = sizeof(*pdata->regulator_init_data);52 53 ret = devm_mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells),54 NULL, 0, NULL);55 if (ret)56 dev_err(dev, "failed to add child devices. err=%d\n", ret);57 58 return ret;59}60 61static const struct i2c_device_id sky81452_ids[] = {62 { "sky81452" },63 { }64};65MODULE_DEVICE_TABLE(i2c, sky81452_ids);66 67#ifdef CONFIG_OF68static const struct of_device_id sky81452_of_match[] = {69 { .compatible = "skyworks,sky81452", },70 { }71};72MODULE_DEVICE_TABLE(of, sky81452_of_match);73#endif74 75static struct i2c_driver sky81452_driver = {76 .driver = {77 .name = "sky81452",78 .of_match_table = of_match_ptr(sky81452_of_match),79 },80 .probe = sky81452_probe,81 .id_table = sky81452_ids,82};83 84module_i2c_driver(sky81452_driver);85 86MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");87MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");88MODULE_LICENSE("GPL v2");89