projects / deliverable / linux.git / blame
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1 | /* |
| 2 | * Arizona-i2c.c -- Arizona I2C bus interface | |
| 3 | * | |
| 4 | * Copyright 2012 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 | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/err.h> | |
| 14 | #include <linux/i2c.h> | |
| 15 | #include <linux/module.h> | |
| 16 | #include <linux/pm_runtime.h> | |
| 17 | #include <linux/regmap.h> | |
| 18 | #include <linux/regulator/consumer.h> | |
| 19 | #include <linux/slab.h> | |
| 20 | ||
| 21 | #include <linux/mfd/arizona/core.h> | |
| 22 | ||
| 23 | #include "arizona.h" | |
| 24 | ||
| f791be49 | 25 | static int arizona_i2c_probe(struct i2c_client *i2c, |
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26 | const struct i2c_device_id *id) |
| 27 | { | |
| 28 | struct arizona *arizona; | |
| 29 | const struct regmap_config *regmap_config; | |
| d781009c | 30 | int ret, type; |
| c6f75622 | 31 | |
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32 | if (i2c->dev.of_node) |
| 33 | type = arizona_of_get_type(&i2c->dev); | |
| 34 | else | |
| 35 | type = id->driver_data; | |
| 36 | ||
| 37 | switch (type) { | |
| 863df8d5 | 38 | #ifdef CONFIG_MFD_WM5102 |
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39 | case WM5102: |
| 40 | regmap_config = &wm5102_i2c_regmap; | |
| 41 | break; | |
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42 | #endif |
| 43 | #ifdef CONFIG_MFD_WM5110 | |
| 44 | case WM5110: | |
| 45 | regmap_config = &wm5110_i2c_regmap; | |
| 46 | break; | |
| 863df8d5 | 47 | #endif |
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48 | default: |
| 49 | dev_err(&i2c->dev, "Unknown device type %ld\n", | |
| 50 | id->driver_data); | |
| 51 | return -EINVAL; | |
| 52 | } | |
| 53 | ||
| 54 | arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); | |
| 55 | if (arizona == NULL) | |
| 56 | return -ENOMEM; | |
| 57 | ||
| 58 | arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); | |
| 59 | if (IS_ERR(arizona->regmap)) { | |
| 60 | ret = PTR_ERR(arizona->regmap); | |
| 61 | dev_err(&i2c->dev, "Failed to allocate register map: %d\n", | |
| 62 | ret); | |
| 63 | return ret; | |
| 64 | } | |
| 65 | ||
| 66 | arizona->type = id->driver_data; | |
| 67 | arizona->dev = &i2c->dev; | |
| 68 | arizona->irq = i2c->irq; | |
| 69 | ||
| 70 | return arizona_dev_init(arizona); | |
| 71 | } | |
| 72 | ||
| 4740f73f | 73 | static int arizona_i2c_remove(struct i2c_client *i2c) |
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74 | { |
| 75 | struct arizona *arizona = dev_get_drvdata(&i2c->dev); | |
| 76 | arizona_dev_exit(arizona); | |
| 77 | return 0; | |
| 78 | } | |
| 79 | ||
| 80 | static const struct i2c_device_id arizona_i2c_id[] = { | |
| 81 | { "wm5102", WM5102 }, | |
| e102befe | 82 | { "wm5110", WM5110 }, |
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83 | { } |
| 84 | }; | |
| 85 | MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); | |
| 86 | ||
| 87 | static struct i2c_driver arizona_i2c_driver = { | |
| 88 | .driver = { | |
| 89 | .name = "arizona", | |
| 90 | .owner = THIS_MODULE, | |
| 91 | .pm = &arizona_pm_ops, | |
| d781009c | 92 | .of_match_table = of_match_ptr(arizona_of_match), |
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93 | }, |
| 94 | .probe = arizona_i2c_probe, | |
| 84449216 | 95 | .remove = arizona_i2c_remove, |
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96 | .id_table = arizona_i2c_id, |
| 97 | }; | |
| 98 | ||
| 99 | module_i2c_driver(arizona_i2c_driver); | |
| 100 | ||
| 101 | MODULE_DESCRIPTION("Arizona I2C bus interface"); | |
| 102 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
| 103 | MODULE_LICENSE("GPL"); |