cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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da9052-spi.c (2280B)

      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
     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");
    105MODULE_LICENSE("GPL");