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 = NULL; 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 case WM5102: 41 if (IS_ENABLED(CONFIG_MFD_WM5102)) 42 regmap_config = &wm5102_i2c_regmap; 43 break; 44 case WM5110: 45 case WM8280: 46 if (IS_ENABLED(CONFIG_MFD_WM5110)) 47 regmap_config = &wm5110_i2c_regmap; 48 break; 49 case WM8997: 50 if (IS_ENABLED(CONFIG_MFD_WM8997)) 51 regmap_config = &wm8997_i2c_regmap; 52 break; 53 case WM8998: 54 case WM1814: 55 if (IS_ENABLED(CONFIG_MFD_WM8998)) 56 regmap_config = &wm8998_i2c_regmap; 57 break; 58 default: 59 dev_err(&i2c->dev, "Unknown device type %ld\n", type); 60 return -EINVAL; 61 } 62 63 if (!regmap_config) { 64 dev_err(&i2c->dev, 65 "No kernel support for device type %ld\n", type); 66 return -EINVAL; 67 } 68 69 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); 70 if (arizona == NULL) 71 return -ENOMEM; 72 73 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); 74 if (IS_ERR(arizona->regmap)) { 75 ret = PTR_ERR(arizona->regmap); 76 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 77 ret); 78 return ret; 79 } 80 81 arizona->type = type; 82 arizona->dev = &i2c->dev; 83 arizona->irq = i2c->irq; 84 85 return arizona_dev_init(arizona); 86 } 87 88 static int arizona_i2c_remove(struct i2c_client *i2c) 89 { 90 struct arizona *arizona = dev_get_drvdata(&i2c->dev); 91 92 arizona_dev_exit(arizona); 93 94 return 0; 95 } 96 97 static const struct i2c_device_id arizona_i2c_id[] = { 98 { "wm5102", WM5102 }, 99 { "wm5110", WM5110 }, 100 { "wm8280", WM8280 }, 101 { "wm8997", WM8997 }, 102 { "wm8998", WM8998 }, 103 { "wm1814", WM1814 }, 104 { } 105 }; 106 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); 107 108 static struct i2c_driver arizona_i2c_driver = { 109 .driver = { 110 .name = "arizona", 111 .pm = &arizona_pm_ops, 112 .of_match_table = of_match_ptr(arizona_of_match), 113 }, 114 .probe = arizona_i2c_probe, 115 .remove = arizona_i2c_remove, 116 .id_table = arizona_i2c_id, 117 }; 118 119 module_i2c_driver(arizona_i2c_driver); 120 121 MODULE_DESCRIPTION("Arizona I2C bus interface"); 122 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 123 MODULE_LICENSE("GPL"); 124