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 = NULL; 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 case WM5102: 41 if (IS_ENABLED(CONFIG_MFD_WM5102)) 42 regmap_config = &wm5102_spi_regmap; 43 break; 44 case WM5110: 45 case WM8280: 46 if (IS_ENABLED(CONFIG_MFD_WM5110)) 47 regmap_config = &wm5110_spi_regmap; 48 break; 49 default: 50 dev_err(&spi->dev, "Unknown device type %ld\n", type); 51 return -EINVAL; 52 } 53 54 if (!regmap_config) { 55 dev_err(&spi->dev, 56 "No kernel support for device type %ld\n", type); 57 return -EINVAL; 58 } 59 60 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL); 61 if (arizona == NULL) 62 return -ENOMEM; 63 64 arizona->regmap = devm_regmap_init_spi(spi, regmap_config); 65 if (IS_ERR(arizona->regmap)) { 66 ret = PTR_ERR(arizona->regmap); 67 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 68 ret); 69 return ret; 70 } 71 72 arizona->type = type; 73 arizona->dev = &spi->dev; 74 arizona->irq = spi->irq; 75 76 return arizona_dev_init(arizona); 77 } 78 79 static int arizona_spi_remove(struct spi_device *spi) 80 { 81 struct arizona *arizona = spi_get_drvdata(spi); 82 83 arizona_dev_exit(arizona); 84 85 return 0; 86 } 87 88 static const struct spi_device_id arizona_spi_ids[] = { 89 { "wm5102", WM5102 }, 90 { "wm5110", WM5110 }, 91 { "wm8280", WM8280 }, 92 { }, 93 }; 94 MODULE_DEVICE_TABLE(spi, arizona_spi_ids); 95 96 static struct spi_driver arizona_spi_driver = { 97 .driver = { 98 .name = "arizona", 99 .pm = &arizona_pm_ops, 100 .of_match_table = of_match_ptr(arizona_of_match), 101 }, 102 .probe = arizona_spi_probe, 103 .remove = arizona_spi_remove, 104 .id_table = arizona_spi_ids, 105 }; 106 107 module_spi_driver(arizona_spi_driver); 108 109 MODULE_DESCRIPTION("Arizona SPI bus interface"); 110 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 111 MODULE_LICENSE("GPL"); 112