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 25 static int arizona_i2c_probe(struct i2c_client *i2c, 26 const struct i2c_device_id *id) 27 { 28 struct arizona *arizona; 29 const struct regmap_config *regmap_config; 30 int ret; 31 32 switch (id->driver_data) { 33 #ifdef CONFIG_MFD_WM5102 34 case WM5102: 35 regmap_config = &wm5102_i2c_regmap; 36 break; 37 #endif 38 #ifdef CONFIG_MFD_WM5110 39 case WM5110: 40 regmap_config = &wm5110_i2c_regmap; 41 break; 42 #endif 43 default: 44 dev_err(&i2c->dev, "Unknown device type %ld\n", 45 id->driver_data); 46 return -EINVAL; 47 } 48 49 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); 50 if (arizona == NULL) 51 return -ENOMEM; 52 53 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); 54 if (IS_ERR(arizona->regmap)) { 55 ret = PTR_ERR(arizona->regmap); 56 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 57 ret); 58 return ret; 59 } 60 61 arizona->type = id->driver_data; 62 arizona->dev = &i2c->dev; 63 arizona->irq = i2c->irq; 64 65 return arizona_dev_init(arizona); 66 } 67 68 static int arizona_i2c_remove(struct i2c_client *i2c) 69 { 70 struct arizona *arizona = dev_get_drvdata(&i2c->dev); 71 arizona_dev_exit(arizona); 72 return 0; 73 } 74 75 static const struct i2c_device_id arizona_i2c_id[] = { 76 { "wm5102", WM5102 }, 77 { "wm5110", WM5110 }, 78 { } 79 }; 80 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); 81 82 static struct i2c_driver arizona_i2c_driver = { 83 .driver = { 84 .name = "arizona", 85 .owner = THIS_MODULE, 86 .pm = &arizona_pm_ops, 87 }, 88 .probe = arizona_i2c_probe, 89 .remove = arizona_i2c_remove, 90 .id_table = arizona_i2c_id, 91 }; 92 93 module_i2c_driver(arizona_i2c_driver); 94 95 MODULE_DESCRIPTION("Arizona I2C bus interface"); 96 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 97 MODULE_LICENSE("GPL"); 98