1 /* 2 * SPI access for Dialog DA9052 PMICs. 3 * 4 * Copyright(c) 2011 Dialog Semiconductor Ltd. 5 * 6 * Author: David Dajun Chen <dchen@diasemi.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 as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 */ 14 15 #include <linux/device.h> 16 #include <linux/module.h> 17 #include <linux/input.h> 18 #include <linux/mfd/core.h> 19 #include <linux/spi/spi.h> 20 #include <linux/err.h> 21 22 #include <linux/mfd/da9052/da9052.h> 23 24 static int da9052_spi_probe(struct spi_device *spi) 25 { 26 int ret; 27 const struct spi_device_id *id = spi_get_device_id(spi); 28 struct da9052 *da9052; 29 30 da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL); 31 if (!da9052) 32 return -ENOMEM; 33 34 spi->mode = SPI_MODE_0 | SPI_CPOL; 35 spi->bits_per_word = 8; 36 spi_setup(spi); 37 38 da9052->dev = &spi->dev; 39 da9052->chip_irq = spi->irq; 40 41 spi_set_drvdata(spi, da9052); 42 43 da9052_regmap_config.read_flag_mask = 1; 44 da9052_regmap_config.write_flag_mask = 0; 45 46 da9052->regmap = devm_regmap_init_spi(spi, &da9052_regmap_config); 47 if (IS_ERR(da9052->regmap)) { 48 ret = PTR_ERR(da9052->regmap); 49 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 50 ret); 51 return ret; 52 } 53 54 ret = da9052_device_init(da9052, id->driver_data); 55 if (ret != 0) 56 return ret; 57 58 return 0; 59 } 60 61 static int da9052_spi_remove(struct spi_device *spi) 62 { 63 struct da9052 *da9052 = spi_get_drvdata(spi); 64 65 da9052_device_exit(da9052); 66 return 0; 67 } 68 69 static struct spi_device_id da9052_spi_id[] = { 70 {"da9052", DA9052}, 71 {"da9053-aa", DA9053_AA}, 72 {"da9053-ba", DA9053_BA}, 73 {"da9053-bb", DA9053_BB}, 74 {"da9053-bc", DA9053_BC}, 75 {} 76 }; 77 78 static struct spi_driver da9052_spi_driver = { 79 .probe = da9052_spi_probe, 80 .remove = da9052_spi_remove, 81 .id_table = da9052_spi_id, 82 .driver = { 83 .name = "da9052", 84 .owner = THIS_MODULE, 85 }, 86 }; 87 88 static int __init da9052_spi_init(void) 89 { 90 int ret; 91 92 ret = spi_register_driver(&da9052_spi_driver); 93 if (ret != 0) { 94 pr_err("Failed to register DA9052 SPI driver, %d\n", ret); 95 return ret; 96 } 97 98 return 0; 99 } 100 subsys_initcall(da9052_spi_init); 101 102 static void __exit da9052_spi_exit(void) 103 { 104 spi_unregister_driver(&da9052_spi_driver); 105 } 106 module_exit(da9052_spi_exit); 107 108 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); 109 MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC"); 110 MODULE_LICENSE("GPL"); 111