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");
105