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