1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Arizona-i2c.c -- Arizona I2C bus interface 4 * 5 * Copyright 2012 Wolfson Microelectronics plc 6 * 7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 8 */ 9 10 #include <linux/err.h> 11 #include <linux/i2c.h> 12 #include <linux/module.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/regmap.h> 15 #include <linux/regulator/consumer.h> 16 #include <linux/slab.h> 17 #include <linux/of.h> 18 19 #include <linux/mfd/arizona/core.h> 20 21 #include "arizona.h" 22 23 static int arizona_i2c_probe(struct i2c_client *i2c, 24 const struct i2c_device_id *id) 25 { 26 struct arizona *arizona; 27 const struct regmap_config *regmap_config = NULL; 28 unsigned long type; 29 int ret; 30 31 if (i2c->dev.of_node) 32 type = arizona_of_get_type(&i2c->dev); 33 else 34 type = id->driver_data; 35 36 switch (type) { 37 case WM5102: 38 if (IS_ENABLED(CONFIG_MFD_WM5102)) 39 regmap_config = &wm5102_i2c_regmap; 40 break; 41 case WM5110: 42 case WM8280: 43 if (IS_ENABLED(CONFIG_MFD_WM5110)) 44 regmap_config = &wm5110_i2c_regmap; 45 break; 46 case WM8997: 47 if (IS_ENABLED(CONFIG_MFD_WM8997)) 48 regmap_config = &wm8997_i2c_regmap; 49 break; 50 case WM8998: 51 case WM1814: 52 if (IS_ENABLED(CONFIG_MFD_WM8998)) 53 regmap_config = &wm8998_i2c_regmap; 54 break; 55 default: 56 dev_err(&i2c->dev, "Unknown device type %ld\n", type); 57 return -EINVAL; 58 } 59 60 if (!regmap_config) { 61 dev_err(&i2c->dev, 62 "No kernel support for device type %ld\n", type); 63 return -EINVAL; 64 } 65 66 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); 67 if (arizona == NULL) 68 return -ENOMEM; 69 70 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); 71 if (IS_ERR(arizona->regmap)) { 72 ret = PTR_ERR(arizona->regmap); 73 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 74 ret); 75 return ret; 76 } 77 78 arizona->type = type; 79 arizona->dev = &i2c->dev; 80 arizona->irq = i2c->irq; 81 82 return arizona_dev_init(arizona); 83 } 84 85 static int arizona_i2c_remove(struct i2c_client *i2c) 86 { 87 struct arizona *arizona = dev_get_drvdata(&i2c->dev); 88 89 arizona_dev_exit(arizona); 90 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