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 #ifdef CONFIG_MFD_WM8998 57 case WM8998: 58 case WM1814: 59 regmap_config = &wm8998_i2c_regmap; 60 break; 61 #endif 62 default: 63 dev_err(&i2c->dev, "Unknown device type %ld\n", 64 id->driver_data); 65 return -EINVAL; 66 } 67 68 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); 69 if (arizona == NULL) 70 return -ENOMEM; 71 72 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); 73 if (IS_ERR(arizona->regmap)) { 74 ret = PTR_ERR(arizona->regmap); 75 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 76 ret); 77 return ret; 78 } 79 80 arizona->type = id->driver_data; 81 arizona->dev = &i2c->dev; 82 arizona->irq = i2c->irq; 83 84 return arizona_dev_init(arizona); 85 } 86 87 static int arizona_i2c_remove(struct i2c_client *i2c) 88 { 89 struct arizona *arizona = dev_get_drvdata(&i2c->dev); 90 arizona_dev_exit(arizona); 91 return 0; 92 } 93 94 static const struct i2c_device_id arizona_i2c_id[] = { 95 { "wm5102", WM5102 }, 96 { "wm5110", WM5110 }, 97 { "wm8280", WM8280 }, 98 { "wm8997", WM8997 }, 99 { "wm8998", WM8998 }, 100 { "wm1814", WM1814 }, 101 { } 102 }; 103 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); 104 105 static struct i2c_driver arizona_i2c_driver = { 106 .driver = { 107 .name = "arizona", 108 .pm = &arizona_pm_ops, 109 .of_match_table = of_match_ptr(arizona_of_match), 110 }, 111 .probe = arizona_i2c_probe, 112 .remove = arizona_i2c_remove, 113 .id_table = arizona_i2c_id, 114 }; 115 116 module_i2c_driver(arizona_i2c_driver); 117 118 MODULE_DESCRIPTION("Arizona I2C bus interface"); 119 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 120 MODULE_LICENSE("GPL"); 121