| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | /* |
| 2 | * sky81452.c SKY81452 MFD driver |
| 3 | * |
| 4 | * Copyright 2014 Skyworks Solutions Inc. |
| 5 | * Author : Gyungoh Yoo <jack.yoo@skyworksinc.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License version 2 |
| 9 | * as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with this program; if not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/err.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/i2c.h> |
| 26 | #include <linux/regmap.h> |
| 27 | #include <linux/mfd/core.h> |
| 28 | #include <linux/mfd/sky81452.h> |
| 29 | |
| 30 | static const struct regmap_config sky81452_config = { |
| 31 | .reg_bits = 8, |
| 32 | .val_bits = 8, |
| 33 | }; |
| 34 | |
| 35 | static int sky81452_probe(struct i2c_client *client, |
| 36 | const struct i2c_device_id *id) |
| 37 | { |
| 38 | struct device *dev = &client->dev; |
| 39 | const struct sky81452_platform_data *pdata = dev_get_platdata(dev); |
| 40 | struct mfd_cell cells[2]; |
| 41 | struct regmap *regmap; |
| 42 | int ret; |
| 43 | |
| 44 | if (!pdata) { |
| 45 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
| 46 | if (!pdata) |
| 47 | return -ENOMEM; |
| 48 | } |
| 49 | |
| 50 | regmap = devm_regmap_init_i2c(client, &sky81452_config); |
| 51 | if (IS_ERR(regmap)) { |
| 52 | dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap)); |
| 53 | return PTR_ERR(regmap); |
| 54 | } |
| 55 | |
| 56 | i2c_set_clientdata(client, regmap); |
| 57 | |
| 58 | memset(cells, 0, sizeof(cells)); |
| 59 | cells[0].name = "sky81452-backlight"; |
| 60 | cells[0].of_compatible = "skyworks,sky81452-backlight"; |
| 61 | cells[0].platform_data = pdata->bl_pdata; |
| 62 | cells[0].pdata_size = sizeof(*pdata->bl_pdata); |
| 63 | cells[1].name = "sky81452-regulator"; |
| 64 | cells[1].platform_data = pdata->regulator_init_data; |
| 65 | cells[1].pdata_size = sizeof(*pdata->regulator_init_data); |
| 66 | |
| 67 | ret = devm_mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells), |
| 68 | NULL, 0, NULL); |
| 69 | if (ret) |
| 70 | dev_err(dev, "failed to add child devices. err=%d\n", ret); |
| 71 | |
| 72 | return ret; |
| 73 | } |
| 74 | |
| 75 | static const struct i2c_device_id sky81452_ids[] = { |
| 76 | { "sky81452" }, |
| 77 | { } |
| 78 | }; |
| 79 | MODULE_DEVICE_TABLE(i2c, sky81452_ids); |
| 80 | |
| 81 | #ifdef CONFIG_OF |
| 82 | static const struct of_device_id sky81452_of_match[] = { |
| 83 | { .compatible = "skyworks,sky81452", }, |
| 84 | { } |
| 85 | }; |
| 86 | MODULE_DEVICE_TABLE(of, sky81452_of_match); |
| 87 | #endif |
| 88 | |
| 89 | static struct i2c_driver sky81452_driver = { |
| 90 | .driver = { |
| 91 | .name = "sky81452", |
| 92 | .of_match_table = of_match_ptr(sky81452_of_match), |
| 93 | }, |
| 94 | .probe = sky81452_probe, |
| 95 | .id_table = sky81452_ids, |
| 96 | }; |
| 97 | |
| 98 | module_i2c_driver(sky81452_driver); |
| 99 | |
| 100 | MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver"); |
| 101 | MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>"); |
| 102 | MODULE_LICENSE("GPL v2"); |