1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * SPI access for Dialog DA9052 PMICs. 4 * 5 * Copyright(c) 2011 Dialog Semiconductor Ltd. 6 * 7 * Author: David Dajun Chen <dchen@diasemi.com> 8 */ 9 10 #include <linux/device.h> 11 #include <linux/module.h> 12 #include <linux/input.h> 13 #include <linux/mfd/core.h> 14 #include <linux/spi/spi.h> 15 #include <linux/err.h> 16 17 #include <linux/mfd/da9052/da9052.h> 18 19 static int da9052_spi_probe(struct spi_device *spi) 20 { 21 struct regmap_config config; 22 int ret; 23 const struct spi_device_id *id = spi_get_device_id(spi); 24 struct da9052 *da9052; 25 26 da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL); 27 if (!da9052) 28 return -ENOMEM; 29 30 spi->mode = SPI_MODE_0; 31 spi->bits_per_word = 8; 32 spi_setup(spi); 33 34 da9052->dev = &spi->dev; 35 da9052->chip_irq = spi->irq; 36 37 spi_set_drvdata(spi, da9052); 38 39 config = da9052_regmap_config; 40 config.read_flag_mask = 1; 41 config.reg_bits = 7; 42 config.pad_bits = 1; 43 config.val_bits = 8; 44 config.use_single_read = true; 45 config.use_single_write = true; 46 47 da9052->regmap = devm_regmap_init_spi(spi, &config); 48 if (IS_ERR(da9052->regmap)) { 49 ret = PTR_ERR(da9052->regmap); 50 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 51 ret); 52 return ret; 53 } 54 55 return da9052_device_init(da9052, id->driver_data); 56 } 57 58 static void da9052_spi_remove(struct spi_device *spi) 59 { 60 struct da9052 *da9052 = spi_get_drvdata(spi); 61 62 da9052_device_exit(da9052); 63 } 64 65 static const struct spi_device_id da9052_spi_id[] = { 66 {"da9052", DA9052}, 67 {"da9053-aa", DA9053_AA}, 68 {"da9053-ba", DA9053_BA}, 69 {"da9053-bb", DA9053_BB}, 70 {"da9053-bc", DA9053_BC}, 71 {} 72 }; 73 74 static struct spi_driver da9052_spi_driver = { 75 .probe = da9052_spi_probe, 76 .remove = da9052_spi_remove, 77 .id_table = da9052_spi_id, 78 .driver = { 79 .name = "da9052", 80 }, 81 }; 82 83 static int __init da9052_spi_init(void) 84 { 85 int ret; 86 87 ret = spi_register_driver(&da9052_spi_driver); 88 if (ret != 0) { 89 pr_err("Failed to register DA9052 SPI driver, %d\n", ret); 90 return ret; 91 } 92 93 return 0; 94 } 95 subsys_initcall(da9052_spi_init); 96 97 static void __exit da9052_spi_exit(void) 98 { 99 spi_unregister_driver(&da9052_spi_driver); 100 } 101 module_exit(da9052_spi_exit); 102 103 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); 104 MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC"); 105