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 #include <linux/of.h> 21 22 #include <linux/mfd/arizona/core.h> 23 24 #include "arizona.h" 25 26 static int arizona_i2c_probe(struct i2c_client *i2c, 27 const struct i2c_device_id *id) 28 { 29 struct arizona *arizona; 30 const struct regmap_config *regmap_config; 31 int ret, type; 32 33 if (i2c->dev.of_node) 34 type = arizona_of_get_type(&i2c->dev); 35 else 36 type = id->driver_data; 37 38 switch (type) { 39 #ifdef CONFIG_MFD_WM5102 40 case WM5102: 41 regmap_config = &wm5102_i2c_regmap; 42 break; 43 #endif 44 #ifdef CONFIG_MFD_WM5110 45 case WM5110: 46 regmap_config = &wm5110_i2c_regmap; 47 break; 48 #endif 49 #ifdef CONFIG_MFD_WM8997 50 case WM8997: 51 regmap_config = &wm8997_i2c_regmap; 52 break; 53 #endif 54 default: 55 dev_err(&i2c->dev, "Unknown device type %ld\n", 56 id->driver_data); 57 return -EINVAL; 58 } 59 60 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); 61 if (arizona == NULL) 62 return -ENOMEM; 63 64 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); 65 if (IS_ERR(arizona->regmap)) { 66 ret = PTR_ERR(arizona->regmap); 67 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 68 ret); 69 return ret; 70 } 71 72 arizona->type = id->driver_data; 73 arizona->dev = &i2c->dev; 74 arizona->irq = i2c->irq; 75 76 return arizona_dev_init(arizona); 77 } 78 79 static int arizona_i2c_remove(struct i2c_client *i2c) 80 { 81 struct arizona *arizona = dev_get_drvdata(&i2c->dev); 82 arizona_dev_exit(arizona); 83 return 0; 84 } 85 86 static const struct i2c_device_id arizona_i2c_id[] = { 87 { "wm5102", WM5102 }, 88 { "wm5110", WM5110 }, 89 { "wm8997", WM8997 }, 90 { } 91 }; 92 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); 93 94 static struct i2c_driver arizona_i2c_driver = { 95 .driver = { 96 .name = "arizona", 97 .owner = THIS_MODULE, 98 .pm = &arizona_pm_ops, 99 .of_match_table = of_match_ptr(arizona_of_match), 100 }, 101 .probe = arizona_i2c_probe, 102 .remove = arizona_i2c_remove, 103 .id_table = arizona_i2c_id, 104 }; 105 106 module_i2c_driver(arizona_i2c_driver); 107 108 MODULE_DESCRIPTION("Arizona I2C bus interface"); 109 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 110 MODULE_LICENSE("GPL"); 111