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, type; 31 32 if (spi->dev.of_node) 33 type = arizona_of_get_type(&spi->dev); 34 else 35 type = id->driver_data; 36 37 switch (type) { 38 #ifdef CONFIG_MFD_WM5102 39 case WM5102: 40 regmap_config = &wm5102_spi_regmap; 41 break; 42 #endif 43 #ifdef CONFIG_MFD_WM5110 44 case WM5110: 45 regmap_config = &wm5110_spi_regmap; 46 break; 47 #endif 48 default: 49 dev_err(&spi->dev, "Unknown device type %ld\n", 50 id->driver_data); 51 return -EINVAL; 52 } 53 54 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL); 55 if (arizona == NULL) 56 return -ENOMEM; 57 58 arizona->regmap = devm_regmap_init_spi(spi, regmap_config); 59 if (IS_ERR(arizona->regmap)) { 60 ret = PTR_ERR(arizona->regmap); 61 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 62 ret); 63 return ret; 64 } 65 66 arizona->type = id->driver_data; 67 arizona->dev = &spi->dev; 68 arizona->irq = spi->irq; 69 70 return arizona_dev_init(arizona); 71 } 72 73 static int arizona_spi_remove(struct spi_device *spi) 74 { 75 struct arizona *arizona = spi_get_drvdata(spi); 76 arizona_dev_exit(arizona); 77 return 0; 78 } 79 80 static const struct spi_device_id arizona_spi_ids[] = { 81 { "wm5102", WM5102 }, 82 { "wm5110", WM5110 }, 83 { }, 84 }; 85 MODULE_DEVICE_TABLE(spi, arizona_spi_ids); 86 87 static struct spi_driver arizona_spi_driver = { 88 .driver = { 89 .name = "arizona", 90 .owner = THIS_MODULE, 91 .pm = &arizona_pm_ops, 92 .of_match_table = of_match_ptr(arizona_of_match), 93 }, 94 .probe = arizona_spi_probe, 95 .remove = arizona_spi_remove, 96 .id_table = arizona_spi_ids, 97 }; 98 99 module_spi_driver(arizona_spi_driver); 100 101 MODULE_DESCRIPTION("Arizona SPI bus interface"); 102 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 103 MODULE_LICENSE("GPL"); 104