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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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 19static 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 58static 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 65static 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 74static 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 83static 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}95subsys_initcall(da9052_spi_init);96 97static void __exit da9052_spi_exit(void)98{99 spi_unregister_driver(&da9052_spi_driver);100}101module_exit(da9052_spi_exit);102 103MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");104MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");105