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 struct arizona *arizona; 26 const struct regmap_config *regmap_config = NULL; 27 unsigned long type; 28 int ret; 29 30 type = (uintptr_t)i2c_get_match_data(i2c); 31 switch (type) { 32 case WM5102: 33 if (IS_ENABLED(CONFIG_MFD_WM5102)) 34 regmap_config = &wm5102_i2c_regmap; 35 break; 36 case WM5110: 37 case WM8280: 38 if (IS_ENABLED(CONFIG_MFD_WM5110)) 39 regmap_config = &wm5110_i2c_regmap; 40 break; 41 case WM8997: 42 if (IS_ENABLED(CONFIG_MFD_WM8997)) 43 regmap_config = &wm8997_i2c_regmap; 44 break; 45 case WM8998: 46 case WM1814: 47 if (IS_ENABLED(CONFIG_MFD_WM8998)) 48 regmap_config = &wm8998_i2c_regmap; 49 break; 50 default: 51 dev_err(&i2c->dev, "Unknown device type %ld\n", type); 52 return -EINVAL; 53 } 54 55 if (!regmap_config) { 56 dev_err(&i2c->dev, 57 "No kernel support for device type %ld\n", type); 58 return -EINVAL; 59 } 60 61 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); 62 if (arizona == NULL) 63 return -ENOMEM; 64 65 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); 66 if (IS_ERR(arizona->regmap)) { 67 ret = PTR_ERR(arizona->regmap); 68 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 69 ret); 70 return ret; 71 } 72 73 arizona->type = type; 74 arizona->dev = &i2c->dev; 75 arizona->irq = i2c->irq; 76 77 return arizona_dev_init(arizona); 78 } 79 80 static void arizona_i2c_remove(struct i2c_client *i2c) 81 { 82 struct arizona *arizona = dev_get_drvdata(&i2c->dev); 83 84 arizona_dev_exit(arizona); 85 } 86 87 static const struct i2c_device_id arizona_i2c_id[] = { 88 { "wm5102", WM5102 }, 89 { "wm5110", WM5110 }, 90 { "wm8280", WM8280 }, 91 { "wm8997", WM8997 }, 92 { "wm8998", WM8998 }, 93 { "wm1814", WM1814 }, 94 { } 95 }; 96 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); 97 98 #ifdef CONFIG_OF 99 static const struct of_device_id arizona_i2c_of_match[] = { 100 { .compatible = "wlf,wm5102", .data = (void *)WM5102 }, 101 { .compatible = "wlf,wm5110", .data = (void *)WM5110 }, 102 { .compatible = "wlf,wm8280", .data = (void *)WM8280 }, 103 { .compatible = "wlf,wm8997", .data = (void *)WM8997 }, 104 { .compatible = "wlf,wm8998", .data = (void *)WM8998 }, 105 { .compatible = "wlf,wm1814", .data = (void *)WM1814 }, 106 {}, 107 }; 108 MODULE_DEVICE_TABLE(of, arizona_i2c_of_match); 109 #endif 110 111 static struct i2c_driver arizona_i2c_driver = { 112 .driver = { 113 .name = "arizona", 114 .pm = pm_ptr(&arizona_pm_ops), 115 .of_match_table = of_match_ptr(arizona_i2c_of_match), 116 }, 117 .probe = arizona_i2c_probe, 118 .remove = arizona_i2c_remove, 119 .id_table = arizona_i2c_id, 120 }; 121 122 module_i2c_driver(arizona_i2c_driver); 123 124 MODULE_SOFTDEP("pre: arizona_ldo1"); 125 MODULE_DESCRIPTION("Arizona I2C bus interface"); 126 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 127 MODULE_LICENSE("GPL"); 128