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 #include <linux/of.h> 21 22 #include <linux/mfd/arizona/core.h> 23 24 #include "arizona.h" 25 26 static int arizona_spi_probe(struct spi_device *spi) 27 { 28 const struct spi_device_id *id = spi_get_device_id(spi); 29 struct arizona *arizona; 30 const struct regmap_config *regmap_config; 31 unsigned long type; 32 int ret; 33 34 if (spi->dev.of_node) 35 type = arizona_of_get_type(&spi->dev); 36 else 37 type = id->driver_data; 38 39 switch (type) { 40 #ifdef CONFIG_MFD_WM5102 41 case WM5102: 42 regmap_config = &wm5102_spi_regmap; 43 break; 44 #endif 45 #ifdef CONFIG_MFD_WM5110 46 case WM5110: 47 case WM8280: 48 regmap_config = &wm5110_spi_regmap; 49 break; 50 #endif 51 default: 52 dev_err(&spi->dev, "Unknown device type %ld\n", 53 id->driver_data); 54 return -EINVAL; 55 } 56 57 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL); 58 if (arizona == NULL) 59 return -ENOMEM; 60 61 arizona->regmap = devm_regmap_init_spi(spi, regmap_config); 62 if (IS_ERR(arizona->regmap)) { 63 ret = PTR_ERR(arizona->regmap); 64 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 65 ret); 66 return ret; 67 } 68 69 arizona->type = id->driver_data; 70 arizona->dev = &spi->dev; 71 arizona->irq = spi->irq; 72 73 return arizona_dev_init(arizona); 74 } 75 76 static int arizona_spi_remove(struct spi_device *spi) 77 { 78 struct arizona *arizona = spi_get_drvdata(spi); 79 80 arizona_dev_exit(arizona); 81 82 return 0; 83 } 84 85 static const struct spi_device_id arizona_spi_ids[] = { 86 { "wm5102", WM5102 }, 87 { "wm5110", WM5110 }, 88 { "wm8280", WM8280 }, 89 { }, 90 }; 91 MODULE_DEVICE_TABLE(spi, arizona_spi_ids); 92 93 static struct spi_driver arizona_spi_driver = { 94 .driver = { 95 .name = "arizona", 96 .owner = THIS_MODULE, 97 .pm = &arizona_pm_ops, 98 .of_match_table = of_match_ptr(arizona_of_match), 99 }, 100 .probe = arizona_spi_probe, 101 .remove = arizona_spi_remove, 102 .id_table = arizona_spi_ids, 103 }; 104 105 module_spi_driver(arizona_spi_driver); 106 107 MODULE_DESCRIPTION("Arizona SPI bus interface"); 108 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 109 MODULE_LICENSE("GPL"); 110