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 unsigned long type; 32 int ret; 33 34 if (i2c->dev.of_node) 35 type = arizona_of_get_type(&i2c->dev); 36 else 37 type = id->driver_data; 38 39 switch (type) { 40 #ifdef CONFIG_MFD_WM5102 41 case WM5102: 42 regmap_config = &wm5102_i2c_regmap; 43 break; 44 #endif 45 #ifdef CONFIG_MFD_WM5110 46 case WM5110: 47 regmap_config = &wm5110_i2c_regmap; 48 break; 49 #endif 50 #ifdef CONFIG_MFD_WM8997 51 case WM8997: 52 regmap_config = &wm8997_i2c_regmap; 53 break; 54 #endif 55 default: 56 dev_err(&i2c->dev, "Unknown device type %ld\n", 57 id->driver_data); 58 return -EINVAL; 59 } 60 61 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); 62 if (arizona == NULL) 63 return -ENOMEM; 64 65 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); 66 if (IS_ERR(arizona->regmap)) { 67 ret = PTR_ERR(arizona->regmap); 68 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 69 ret); 70 return ret; 71 } 72 73 arizona->type = id->driver_data; 74 arizona->dev = &i2c->dev; 75 arizona->irq = i2c->irq; 76 77 return arizona_dev_init(arizona); 78 } 79 80 static int arizona_i2c_remove(struct i2c_client *i2c) 81 { 82 struct arizona *arizona = dev_get_drvdata(&i2c->dev); 83 arizona_dev_exit(arizona); 84 return 0; 85 } 86 87 static const struct i2c_device_id arizona_i2c_id[] = { 88 { "wm5102", WM5102 }, 89 { "wm5110", WM5110 }, 90 { "wm8997", WM8997 }, 91 { } 92 }; 93 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); 94 95 static struct i2c_driver arizona_i2c_driver = { 96 .driver = { 97 .name = "arizona", 98 .owner = THIS_MODULE, 99 .pm = &arizona_pm_ops, 100 .of_match_table = of_match_ptr(arizona_of_match), 101 }, 102 .probe = arizona_i2c_probe, 103 .remove = arizona_i2c_remove, 104 .id_table = arizona_i2c_id, 105 }; 106 107 module_i2c_driver(arizona_i2c_driver); 108 109 MODULE_DESCRIPTION("Arizona I2C bus interface"); 110 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 111 MODULE_LICENSE("GPL"); 112