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| 1 | /* |
| 2 | * wm831x-i2c.c -- I2C access for Wolfson WM831x PMICs |
| 3 | * |
| 4 | * Copyright 2009,2010 Wolfson Microelectronics PLC. |
| 5 | * |
| 6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/i2c.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/mfd/core.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/err.h> |
| 22 | #include <linux/regmap.h> |
| 23 | |
| 24 | #include <linux/mfd/wm831x/core.h> |
| 25 | #include <linux/mfd/wm831x/pdata.h> |
| 26 | |
| 27 | static int wm831x_i2c_probe(struct i2c_client *i2c, |
| 28 | const struct i2c_device_id *id) |
| 29 | { |
| 30 | struct wm831x *wm831x; |
| 31 | int ret; |
| 32 | |
| 33 | wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL); |
| 34 | if (wm831x == NULL) |
| 35 | return -ENOMEM; |
| 36 | |
| 37 | i2c_set_clientdata(i2c, wm831x); |
| 38 | wm831x->dev = &i2c->dev; |
| 39 | |
| 40 | wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config); |
| 41 | if (IS_ERR(wm831x->regmap)) { |
| 42 | ret = PTR_ERR(wm831x->regmap); |
| 43 | dev_err(wm831x->dev, "Failed to allocate register map: %d\n", |
| 44 | ret); |
| 45 | return ret; |
| 46 | } |
| 47 | |
| 48 | return wm831x_device_init(wm831x, id->driver_data, i2c->irq); |
| 49 | } |
| 50 | |
| 51 | static int wm831x_i2c_remove(struct i2c_client *i2c) |
| 52 | { |
| 53 | struct wm831x *wm831x = i2c_get_clientdata(i2c); |
| 54 | |
| 55 | wm831x_device_exit(wm831x); |
| 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | static int wm831x_i2c_suspend(struct device *dev) |
| 61 | { |
| 62 | struct wm831x *wm831x = dev_get_drvdata(dev); |
| 63 | |
| 64 | return wm831x_device_suspend(wm831x); |
| 65 | } |
| 66 | |
| 67 | static void wm831x_i2c_shutdown(struct i2c_client *i2c) |
| 68 | { |
| 69 | struct wm831x *wm831x = i2c_get_clientdata(i2c); |
| 70 | |
| 71 | wm831x_device_shutdown(wm831x); |
| 72 | } |
| 73 | |
| 74 | static const struct i2c_device_id wm831x_i2c_id[] = { |
| 75 | { "wm8310", WM8310 }, |
| 76 | { "wm8311", WM8311 }, |
| 77 | { "wm8312", WM8312 }, |
| 78 | { "wm8320", WM8320 }, |
| 79 | { "wm8321", WM8321 }, |
| 80 | { "wm8325", WM8325 }, |
| 81 | { "wm8326", WM8326 }, |
| 82 | { } |
| 83 | }; |
| 84 | MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id); |
| 85 | |
| 86 | static const struct dev_pm_ops wm831x_pm_ops = { |
| 87 | .suspend = wm831x_i2c_suspend, |
| 88 | }; |
| 89 | |
| 90 | static struct i2c_driver wm831x_i2c_driver = { |
| 91 | .driver = { |
| 92 | .name = "wm831x", |
| 93 | .owner = THIS_MODULE, |
| 94 | .pm = &wm831x_pm_ops, |
| 95 | }, |
| 96 | .probe = wm831x_i2c_probe, |
| 97 | .remove = wm831x_i2c_remove, |
| 98 | .shutdown = wm831x_i2c_shutdown, |
| 99 | .id_table = wm831x_i2c_id, |
| 100 | }; |
| 101 | |
| 102 | static int __init wm831x_i2c_init(void) |
| 103 | { |
| 104 | int ret; |
| 105 | |
| 106 | ret = i2c_add_driver(&wm831x_i2c_driver); |
| 107 | if (ret != 0) |
| 108 | pr_err("Failed to register wm831x I2C driver: %d\n", ret); |
| 109 | |
| 110 | return ret; |
| 111 | } |
| 112 | subsys_initcall(wm831x_i2c_init); |
| 113 | |
| 114 | static void __exit wm831x_i2c_exit(void) |
| 115 | { |
| 116 | i2c_del_driver(&wm831x_i2c_driver); |
| 117 | } |
| 118 | module_exit(wm831x_i2c_exit); |
| 119 |
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