1 /* 2 * arizona-spi.c -- Arizona SPI bus interface 3 * 4 * Copyright 2012 Wolfson Microelectronics plc 5 * 6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/err.h> 14 #include <linux/module.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/regmap.h> 17 #include <linux/regulator/consumer.h> 18 #include <linux/slab.h> 19 #include <linux/spi/spi.h> 20 21 #include <linux/mfd/arizona/core.h> 22 23 #include "arizona.h" 24 25 static int arizona_spi_probe(struct spi_device *spi) 26 { 27 const struct spi_device_id *id = spi_get_device_id(spi); 28 struct arizona *arizona; 29 const struct regmap_config *regmap_config; 30 int ret; 31 32 switch (id->driver_data) { 33 #ifdef CONFIG_MFD_WM5102 34 case WM5102: 35 regmap_config = &wm5102_spi_regmap; 36 break; 37 #endif 38 #ifdef CONFIG_MFD_WM5110 39 case WM5110: 40 regmap_config = &wm5110_spi_regmap; 41 break; 42 #endif 43 default: 44 dev_err(&spi->dev, "Unknown device type %ld\n", 45 id->driver_data); 46 return -EINVAL; 47 } 48 49 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL); 50 if (arizona == NULL) 51 return -ENOMEM; 52 53 arizona->regmap = devm_regmap_init_spi(spi, regmap_config); 54 if (IS_ERR(arizona->regmap)) { 55 ret = PTR_ERR(arizona->regmap); 56 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 57 ret); 58 return ret; 59 } 60 61 arizona->type = id->driver_data; 62 arizona->dev = &spi->dev; 63 arizona->irq = spi->irq; 64 65 return arizona_dev_init(arizona); 66 } 67 68 static int arizona_spi_remove(struct spi_device *spi) 69 { 70 struct arizona *arizona = spi_get_drvdata(spi); 71 arizona_dev_exit(arizona); 72 return 0; 73 } 74 75 static const struct spi_device_id arizona_spi_ids[] = { 76 { "wm5102", WM5102 }, 77 { "wm5110", WM5110 }, 78 { }, 79 }; 80 MODULE_DEVICE_TABLE(spi, arizona_spi_ids); 81 82 static struct spi_driver arizona_spi_driver = { 83 .driver = { 84 .name = "arizona", 85 .owner = THIS_MODULE, 86 .pm = &arizona_pm_ops, 87 }, 88 .probe = arizona_spi_probe, 89 .remove = arizona_spi_remove, 90 .id_table = arizona_spi_ids, 91 }; 92 93 module_spi_driver(arizona_spi_driver); 94 95 MODULE_DESCRIPTION("Arizona SPI bus interface"); 96 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 97 MODULE_LICENSE("GPL"); 98