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/mod_devicetable.h> 16 #include <linux/pm_runtime.h> 17 #include <sound/soc.h> 18 19 #include "cs42xx8.h" 20 21 static int cs42xx8_i2c_probe(struct i2c_client *i2c) 22 { 23 int ret; 24 struct cs42xx8_driver_data *drvdata; 25 26 drvdata = (struct cs42xx8_driver_data *)i2c_get_match_data(i2c); 27 if (!drvdata) 28 return dev_err_probe(&i2c->dev, -EINVAL, 29 "failed to find driver data\n"); 30 31 ret = cs42xx8_probe(&i2c->dev, 32 devm_regmap_init_i2c(i2c, &cs42xx8_regmap_config), drvdata); 33 if (ret) 34 return ret; 35 36 pm_runtime_enable(&i2c->dev); 37 pm_request_idle(&i2c->dev); 38 39 return 0; 40 } 41 42 static void cs42xx8_i2c_remove(struct i2c_client *i2c) 43 { 44 pm_runtime_disable(&i2c->dev); 45 } 46 47 static const struct of_device_id cs42xx8_of_match[] = { 48 { .compatible = "cirrus,cs42448", .data = &cs42448_data, }, 49 { .compatible = "cirrus,cs42888", .data = &cs42888_data, }, 50 { /* sentinel */ } 51 }; 52 MODULE_DEVICE_TABLE(of, cs42xx8_of_match); 53 54 static const struct i2c_device_id cs42xx8_i2c_id[] = { 55 {"cs42448", (kernel_ulong_t)&cs42448_data}, 56 {"cs42888", (kernel_ulong_t)&cs42888_data}, 57 {} 58 }; 59 MODULE_DEVICE_TABLE(i2c, cs42xx8_i2c_id); 60 61 static struct i2c_driver cs42xx8_i2c_driver = { 62 .driver = { 63 .name = "cs42xx8", 64 .pm = &cs42xx8_pm, 65 .of_match_table = cs42xx8_of_match, 66 }, 67 .probe = cs42xx8_i2c_probe, 68 .remove = cs42xx8_i2c_remove, 69 .id_table = cs42xx8_i2c_id, 70 }; 71 72 module_i2c_driver(cs42xx8_i2c_driver); 73 74 MODULE_DESCRIPTION("Cirrus Logic CS42448/CS42888 ALSA SoC Codec I2C Driver"); 75 MODULE_AUTHOR("Freescale Semiconductor, Inc."); 76 MODULE_LICENSE("GPL"); 77