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 regmap_config = &wm5110_spi_regmap; 48 break; 49 #endif 50 default: 51 dev_err(&spi->dev, "Unknown device type %ld\n", 52 id->driver_data); 53 return -EINVAL; 54 } 55 56 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL); 57 if (arizona == NULL) 58 return -ENOMEM; 59 60 arizona->regmap = devm_regmap_init_spi(spi, regmap_config); 61 if (IS_ERR(arizona->regmap)) { 62 ret = PTR_ERR(arizona->regmap); 63 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 64 ret); 65 return ret; 66 } 67 68 arizona->type = id->driver_data; 69 arizona->dev = &spi->dev; 70 arizona->irq = spi->irq; 71 72 return arizona_dev_init(arizona); 73 } 74 75 static int arizona_spi_remove(struct spi_device *spi) 76 { 77 struct arizona *arizona = spi_get_drvdata(spi); 78 79 arizona_dev_exit(arizona); 80 81 return 0; 82 } 83 84 static const struct spi_device_id arizona_spi_ids[] = { 85 { "wm5102", WM5102 }, 86 { "wm5110", WM5110 }, 87 { }, 88 }; 89 MODULE_DEVICE_TABLE(spi, arizona_spi_ids); 90 91 static struct spi_driver arizona_spi_driver = { 92 .driver = { 93 .name = "arizona", 94 .owner = THIS_MODULE, 95 .pm = &arizona_pm_ops, 96 .of_match_table = of_match_ptr(arizona_of_match), 97 }, 98 .probe = arizona_spi_probe, 99 .remove = arizona_spi_remove, 100 .id_table = arizona_spi_ids, 101 }; 102 103 module_spi_driver(arizona_spi_driver); 104 105 MODULE_DESCRIPTION("Arizona SPI bus interface"); 106 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 107 MODULE_LICENSE("GPL"); 108