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 struct regmap_config config; 27 int ret; 28 const struct spi_device_id *id = spi_get_device_id(spi); 29 struct da9052 *da9052; 30 31 da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL); 32 if (!da9052) 33 return -ENOMEM; 34 35 spi->mode = SPI_MODE_0; 36 spi->bits_per_word = 8; 37 spi_setup(spi); 38 39 da9052->dev = &spi->dev; 40 da9052->chip_irq = spi->irq; 41 42 spi_set_drvdata(spi, da9052); 43 44 config = da9052_regmap_config; 45 config.read_flag_mask = 1; 46 config.reg_bits = 7; 47 config.pad_bits = 1; 48 config.val_bits = 8; 49 config.use_single_rw = 1; 50 51 da9052->regmap = devm_regmap_init_spi(spi, &config); 52 if (IS_ERR(da9052->regmap)) { 53 ret = PTR_ERR(da9052->regmap); 54 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 55 ret); 56 return ret; 57 } 58 59 return da9052_device_init(da9052, id->driver_data); 60 } 61 62 static int da9052_spi_remove(struct spi_device *spi) 63 { 64 struct da9052 *da9052 = spi_get_drvdata(spi); 65 66 da9052_device_exit(da9052); 67 return 0; 68 } 69 70 static const struct spi_device_id da9052_spi_id[] = { 71 {"da9052", DA9052}, 72 {"da9053-aa", DA9053_AA}, 73 {"da9053-ba", DA9053_BA}, 74 {"da9053-bb", DA9053_BB}, 75 {"da9053-bc", DA9053_BC}, 76 {} 77 }; 78 79 static struct spi_driver da9052_spi_driver = { 80 .probe = da9052_spi_probe, 81 .remove = da9052_spi_remove, 82 .id_table = da9052_spi_id, 83 .driver = { 84 .name = "da9052", 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