projects / deliverable / linux.git / blame
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|---|---|---|
| 2698dc22 GY |
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 = mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells), NULL, 0, NULL); | |
| 68 | if (ret) | |
| 69 | dev_err(dev, "failed to add child devices. err=%d\n", ret); | |
| 70 | ||
| 71 | return ret; | |
| 72 | } | |
| 73 | ||
| 74 | static int sky81452_remove(struct i2c_client *client) | |
| 75 | { | |
| 76 | mfd_remove_devices(&client->dev); | |
| 77 | return 0; | |
| 78 | } | |
| 79 | ||
| 80 | static const struct i2c_device_id sky81452_ids[] = { | |
| 81 | { "sky81452" }, | |
| 82 | { } | |
| 83 | }; | |
| 84 | MODULE_DEVICE_TABLE(i2c, sky81452_ids); | |
| 85 | ||
| 86 | #ifdef CONFIG_OF | |
| 87 | static const struct of_device_id sky81452_of_match[] = { | |
| 88 | { .compatible = "skyworks,sky81452", }, | |
| 89 | { } | |
| 90 | }; | |
| 91 | MODULE_DEVICE_TABLE(of, sky81452_of_match); | |
| 92 | #endif | |
| 93 | ||
| 94 | static struct i2c_driver sky81452_driver = { | |
| 95 | .driver = { | |
| 96 | .name = "sky81452", | |
| 97 | .of_match_table = of_match_ptr(sky81452_of_match), | |
| 98 | }, | |
| 99 | .probe = sky81452_probe, | |
| 100 | .remove = sky81452_remove, | |
| 101 | .id_table = sky81452_ids, | |
| 102 | }; | |
| 103 | ||
| 104 | module_i2c_driver(sky81452_driver); | |
| 105 | ||
| 106 | MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver"); | |
| 107 | MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>"); | |
| 108 | MODULE_LICENSE("GPL v2"); |