1 /* 2 * Cirrus Logic CS42448/CS42888 Audio CODEC DAI I2C driver 3 * 4 * Copyright (C) 2014 Freescale Semiconductor, Inc. 5 * 6 * Author: Nicolin Chen <Guangyu.Chen@freescale.com> 7 * 8 * This file is licensed under the terms of the GNU General Public License 9 * version 2. This program is licensed "as is" without any warranty of any 10 * kind, whether express or implied. 11 */ 12 13 #include <linux/i2c.h> 14 #include <linux/module.h> 15 #include <linux/of_device.h> 16 #include <linux/pm_runtime.h> 17 #include <sound/soc.h> 18 19 #include "cs42xx8.h" 20 21 static const struct of_device_id cs42xx8_of_match[]; 22 23 static int cs42xx8_i2c_probe(struct i2c_client *i2c) 24 { 25 int ret; 26 struct cs42xx8_driver_data *drvdata; 27 const struct of_device_id *of_id; 28 29 of_id = of_match_device(cs42xx8_of_match, &i2c->dev); 30 if (!of_id) { 31 dev_err(&i2c->dev, "failed to find driver data\n"); 32 return -EINVAL; 33 } 34 35 drvdata = (struct cs42xx8_driver_data *)of_id->data; 36 37 ret = cs42xx8_probe(&i2c->dev, 38 devm_regmap_init_i2c(i2c, &cs42xx8_regmap_config), drvdata); 39 if (ret) 40 return ret; 41 42 pm_runtime_enable(&i2c->dev); 43 pm_request_idle(&i2c->dev); 44 45 return 0; 46 } 47 48 static void cs42xx8_i2c_remove(struct i2c_client *i2c) 49 { 50 pm_runtime_disable(&i2c->dev); 51 } 52 53 static const struct of_device_id cs42xx8_of_match[] = { 54 { .compatible = "cirrus,cs42448", .data = &cs42448_data, }, 55 { .compatible = "cirrus,cs42888", .data = &cs42888_data, }, 56 { /* sentinel */ } 57 }; 58 MODULE_DEVICE_TABLE(of, cs42xx8_of_match); 59 60 static const struct i2c_device_id cs42xx8_i2c_id[] = { 61 {"cs42448", (kernel_ulong_t)&cs42448_data}, 62 {"cs42888", (kernel_ulong_t)&cs42888_data}, 63 {} 64 }; 65 MODULE_DEVICE_TABLE(i2c, cs42xx8_i2c_id); 66 67 static struct i2c_driver cs42xx8_i2c_driver = { 68 .driver = { 69 .name = "cs42xx8", 70 .pm = &cs42xx8_pm, 71 .of_match_table = cs42xx8_of_match, 72 }, 73 .probe = cs42xx8_i2c_probe, 74 .remove = cs42xx8_i2c_remove, 75 .id_table = cs42xx8_i2c_id, 76 }; 77 78 module_i2c_driver(cs42xx8_i2c_driver); 79 80 MODULE_DESCRIPTION("Cirrus Logic CS42448/CS42888 ALSA SoC Codec I2C Driver"); 81 MODULE_AUTHOR("Freescale Semiconductor, Inc."); 82 MODULE_LICENSE("GPL"); 83