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, type; 31 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) { 38 #ifdef CONFIG_MFD_WM5102 39 case WM5102: 40 regmap_config = &wm5102_i2c_regmap; 41 break; 42 #endif 43 #ifdef CONFIG_MFD_WM5110 44 case WM5110: 45 regmap_config = &wm5110_i2c_regmap; 46 break; 47 #endif 48 #ifdef CONFIG_MFD_WM8997 49 case WM8997: 50 regmap_config = &wm8997_i2c_regmap; 51 break; 52 #endif 53 default: 54 dev_err(&i2c->dev, "Unknown device type %ld\n", 55 id->driver_data); 56 return -EINVAL; 57 } 58 59 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); 60 if (arizona == NULL) 61 return -ENOMEM; 62 63 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); 64 if (IS_ERR(arizona->regmap)) { 65 ret = PTR_ERR(arizona->regmap); 66 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 67 ret); 68 return ret; 69 } 70 71 arizona->type = id->driver_data; 72 arizona->dev = &i2c->dev; 73 arizona->irq = i2c->irq; 74 75 return arizona_dev_init(arizona); 76 } 77 78 static int arizona_i2c_remove(struct i2c_client *i2c) 79 { 80 struct arizona *arizona = dev_get_drvdata(&i2c->dev); 81 arizona_dev_exit(arizona); 82 return 0; 83 } 84 85 static const struct i2c_device_id arizona_i2c_id[] = { 86 { "wm5102", WM5102 }, 87 { "wm5110", WM5110 }, 88 { "wm8997", WM8997 }, 89 { } 90 }; 91 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); 92 93 static struct i2c_driver arizona_i2c_driver = { 94 .driver = { 95 .name = "arizona", 96 .owner = THIS_MODULE, 97 .pm = &arizona_pm_ops, 98 .of_match_table = of_match_ptr(arizona_of_match), 99 }, 100 .probe = arizona_i2c_probe, 101 .remove = arizona_i2c_remove, 102 .id_table = arizona_i2c_id, 103 }; 104 105 module_i2c_driver(arizona_i2c_driver); 106 107 MODULE_DESCRIPTION("Arizona I2C bus interface"); 108 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 109 MODULE_LICENSE("GPL"); 110