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 { 25 const struct i2c_device_id *id = i2c_client_get_device_id(i2c); 26 const void *match_data; 27 struct arizona *arizona; 28 const struct regmap_config *regmap_config = NULL; 29 unsigned long type = 0; 30 int ret; 31 32 match_data = device_get_match_data(&i2c->dev); 33 if (match_data) 34 type = (unsigned long)match_data; 35 else if (id) 36 type = id->driver_data; 37 38 switch (type) { 39 case WM5102: 40 if (IS_ENABLED(CONFIG_MFD_WM5102)) 41 regmap_config = &wm5102_i2c_regmap; 42 break; 43 case WM5110: 44 case WM8280: 45 if (IS_ENABLED(CONFIG_MFD_WM5110)) 46 regmap_config = &wm5110_i2c_regmap; 47 break; 48 case WM8997: 49 if (IS_ENABLED(CONFIG_MFD_WM8997)) 50 regmap_config = &wm8997_i2c_regmap; 51 break; 52 case WM8998: 53 case WM1814: 54 if (IS_ENABLED(CONFIG_MFD_WM8998)) 55 regmap_config = &wm8998_i2c_regmap; 56 break; 57 default: 58 dev_err(&i2c->dev, "Unknown device type %ld\n", type); 59 return -EINVAL; 60 } 61 62 if (!regmap_config) { 63 dev_err(&i2c->dev, 64 "No kernel support for device type %ld\n", type); 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 = type; 81 arizona->dev = &i2c->dev; 82 arizona->irq = i2c->irq; 83 84 return arizona_dev_init(arizona); 85 } 86 87 static void arizona_i2c_remove(struct i2c_client *i2c) 88 { 89 struct arizona *arizona = dev_get_drvdata(&i2c->dev); 90 91 arizona_dev_exit(arizona); 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 #ifdef CONFIG_OF 106 static const struct of_device_id arizona_i2c_of_match[] = { 107 { .compatible = "wlf,wm5102", .data = (void *)WM5102 }, 108 { .compatible = "wlf,wm5110", .data = (void *)WM5110 }, 109 { .compatible = "wlf,wm8280", .data = (void *)WM8280 }, 110 { .compatible = "wlf,wm8997", .data = (void *)WM8997 }, 111 { .compatible = "wlf,wm8998", .data = (void *)WM8998 }, 112 { .compatible = "wlf,wm1814", .data = (void *)WM1814 }, 113 {}, 114 }; 115 MODULE_DEVICE_TABLE(of, arizona_i2c_of_match); 116 #endif 117 118 static struct i2c_driver arizona_i2c_driver = { 119 .driver = { 120 .name = "arizona", 121 .pm = pm_ptr(&arizona_pm_ops), 122 .of_match_table = of_match_ptr(arizona_i2c_of_match), 123 }, 124 .probe_new = arizona_i2c_probe, 125 .remove = arizona_i2c_remove, 126 .id_table = arizona_i2c_id, 127 }; 128 129 module_i2c_driver(arizona_i2c_driver); 130 131 MODULE_SOFTDEP("pre: arizona_ldo1"); 132 MODULE_DESCRIPTION("Arizona I2C bus interface"); 133 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 134 MODULE_LICENSE("GPL"); 135