1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * arizona-spi.c -- Arizona SPI bus interface 4 * 5 * Copyright 2012 Wolfson Microelectronics plc 6 * 7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 8 */ 9 10 #include <linux/err.h> 11 #include <linux/module.h> 12 #include <linux/pm_runtime.h> 13 #include <linux/regmap.h> 14 #include <linux/regulator/consumer.h> 15 #include <linux/slab.h> 16 #include <linux/spi/spi.h> 17 #include <linux/of.h> 18 19 #include <linux/mfd/arizona/core.h> 20 21 #include "arizona.h" 22 23 static int arizona_spi_probe(struct spi_device *spi) 24 { 25 const struct spi_device_id *id = spi_get_device_id(spi); 26 struct arizona *arizona; 27 const struct regmap_config *regmap_config = NULL; 28 unsigned long type; 29 int ret; 30 31 if (spi->dev.of_node) 32 type = arizona_of_get_type(&spi->dev); 33 else 34 type = id->driver_data; 35 36 switch (type) { 37 case WM5102: 38 if (IS_ENABLED(CONFIG_MFD_WM5102)) 39 regmap_config = &wm5102_spi_regmap; 40 break; 41 case WM5110: 42 case WM8280: 43 if (IS_ENABLED(CONFIG_MFD_WM5110)) 44 regmap_config = &wm5110_spi_regmap; 45 break; 46 case WM1831: 47 case CS47L24: 48 if (IS_ENABLED(CONFIG_MFD_CS47L24)) 49 regmap_config = &cs47l24_spi_regmap; 50 break; 51 default: 52 dev_err(&spi->dev, "Unknown device type %ld\n", type); 53 return -EINVAL; 54 } 55 56 if (!regmap_config) { 57 dev_err(&spi->dev, 58 "No kernel support for device type %ld\n", type); 59 return -EINVAL; 60 } 61 62 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL); 63 if (arizona == NULL) 64 return -ENOMEM; 65 66 arizona->regmap = devm_regmap_init_spi(spi, regmap_config); 67 if (IS_ERR(arizona->regmap)) { 68 ret = PTR_ERR(arizona->regmap); 69 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 70 ret); 71 return ret; 72 } 73 74 arizona->type = type; 75 arizona->dev = &spi->dev; 76 arizona->irq = spi->irq; 77 78 return arizona_dev_init(arizona); 79 } 80 81 static int arizona_spi_remove(struct spi_device *spi) 82 { 83 struct arizona *arizona = spi_get_drvdata(spi); 84 85 arizona_dev_exit(arizona); 86 87 return 0; 88 } 89 90 static const struct spi_device_id arizona_spi_ids[] = { 91 { "wm5102", WM5102 }, 92 { "wm5110", WM5110 }, 93 { "wm8280", WM8280 }, 94 { "wm1831", WM1831 }, 95 { "cs47l24", CS47L24 }, 96 { }, 97 }; 98 MODULE_DEVICE_TABLE(spi, arizona_spi_ids); 99 100 static struct spi_driver arizona_spi_driver = { 101 .driver = { 102 .name = "arizona", 103 .pm = &arizona_pm_ops, 104 .of_match_table = of_match_ptr(arizona_of_match), 105 }, 106 .probe = arizona_spi_probe, 107 .remove = arizona_spi_remove, 108 .id_table = arizona_spi_ids, 109 }; 110 111 module_spi_driver(arizona_spi_driver); 112 113 MODULE_DESCRIPTION("Arizona SPI bus interface"); 114 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 115 MODULE_LICENSE("GPL"); 116