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 case WM8280: 48 regmap_config = &wm5110_i2c_regmap; 49 break; 50 #endif 51 #ifdef CONFIG_MFD_WM8997 52 case WM8997: 53 regmap_config = &wm8997_i2c_regmap; 54 break; 55 #endif 56 default: 57 dev_err(&i2c->dev, "Unknown device type %ld\n", 58 id->driver_data); 59 return -EINVAL; 60 } 61 62 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); 63 if (arizona == NULL) 64 return -ENOMEM; 65 66 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); 67 if (IS_ERR(arizona->regmap)) { 68 ret = PTR_ERR(arizona->regmap); 69 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 70 ret); 71 return ret; 72 } 73 74 arizona->type = id->driver_data; 75 arizona->dev = &i2c->dev; 76 arizona->irq = i2c->irq; 77 78 return arizona_dev_init(arizona); 79 } 80 81 static int arizona_i2c_remove(struct i2c_client *i2c) 82 { 83 struct arizona *arizona = dev_get_drvdata(&i2c->dev); 84 arizona_dev_exit(arizona); 85 return 0; 86 } 87 88 static const struct i2c_device_id arizona_i2c_id[] = { 89 { "wm5102", WM5102 }, 90 { "wm5110", WM5110 }, 91 { "wm8280", WM8280 }, 92 { "wm8997", WM8997 }, 93 { } 94 }; 95 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); 96 97 static struct i2c_driver arizona_i2c_driver = { 98 .driver = { 99 .name = "arizona", 100 .owner = THIS_MODULE, 101 .pm = &arizona_pm_ops, 102 .of_match_table = of_match_ptr(arizona_of_match), 103 }, 104 .probe = arizona_i2c_probe, 105 .remove = arizona_i2c_remove, 106 .id_table = arizona_i2c_id, 107 }; 108 109 module_i2c_driver(arizona_i2c_driver); 110 111 MODULE_DESCRIPTION("Arizona I2C bus interface"); 112 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 113 MODULE_LICENSE("GPL"); 114