1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * SPI access for Dialog DA9052 PMICs.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright(c) 2011 Dialog Semiconductor Ltd.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Author: David Dajun Chen <dchen@diasemi.com>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/device.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/input.h>
13*4882a593Smuzhiyun #include <linux/mfd/core.h>
14*4882a593Smuzhiyun #include <linux/spi/spi.h>
15*4882a593Smuzhiyun #include <linux/err.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #include <linux/mfd/da9052/da9052.h>
18*4882a593Smuzhiyun
da9052_spi_probe(struct spi_device * spi)19*4882a593Smuzhiyun static int da9052_spi_probe(struct spi_device *spi)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun struct regmap_config config;
22*4882a593Smuzhiyun int ret;
23*4882a593Smuzhiyun const struct spi_device_id *id = spi_get_device_id(spi);
24*4882a593Smuzhiyun struct da9052 *da9052;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL);
27*4882a593Smuzhiyun if (!da9052)
28*4882a593Smuzhiyun return -ENOMEM;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun spi->mode = SPI_MODE_0;
31*4882a593Smuzhiyun spi->bits_per_word = 8;
32*4882a593Smuzhiyun spi_setup(spi);
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun da9052->dev = &spi->dev;
35*4882a593Smuzhiyun da9052->chip_irq = spi->irq;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun spi_set_drvdata(spi, da9052);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun config = da9052_regmap_config;
40*4882a593Smuzhiyun config.read_flag_mask = 1;
41*4882a593Smuzhiyun config.reg_bits = 7;
42*4882a593Smuzhiyun config.pad_bits = 1;
43*4882a593Smuzhiyun config.val_bits = 8;
44*4882a593Smuzhiyun config.use_single_read = true;
45*4882a593Smuzhiyun config.use_single_write = true;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun da9052->regmap = devm_regmap_init_spi(spi, &config);
48*4882a593Smuzhiyun if (IS_ERR(da9052->regmap)) {
49*4882a593Smuzhiyun ret = PTR_ERR(da9052->regmap);
50*4882a593Smuzhiyun dev_err(&spi->dev, "Failed to allocate register map: %d\n",
51*4882a593Smuzhiyun ret);
52*4882a593Smuzhiyun return ret;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun return da9052_device_init(da9052, id->driver_data);
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
da9052_spi_remove(struct spi_device * spi)58*4882a593Smuzhiyun static int da9052_spi_remove(struct spi_device *spi)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun struct da9052 *da9052 = spi_get_drvdata(spi);
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun da9052_device_exit(da9052);
63*4882a593Smuzhiyun return 0;
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun static const struct spi_device_id da9052_spi_id[] = {
67*4882a593Smuzhiyun {"da9052", DA9052},
68*4882a593Smuzhiyun {"da9053-aa", DA9053_AA},
69*4882a593Smuzhiyun {"da9053-ba", DA9053_BA},
70*4882a593Smuzhiyun {"da9053-bb", DA9053_BB},
71*4882a593Smuzhiyun {"da9053-bc", DA9053_BC},
72*4882a593Smuzhiyun {}
73*4882a593Smuzhiyun };
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun static struct spi_driver da9052_spi_driver = {
76*4882a593Smuzhiyun .probe = da9052_spi_probe,
77*4882a593Smuzhiyun .remove = da9052_spi_remove,
78*4882a593Smuzhiyun .id_table = da9052_spi_id,
79*4882a593Smuzhiyun .driver = {
80*4882a593Smuzhiyun .name = "da9052",
81*4882a593Smuzhiyun },
82*4882a593Smuzhiyun };
83*4882a593Smuzhiyun
da9052_spi_init(void)84*4882a593Smuzhiyun static int __init da9052_spi_init(void)
85*4882a593Smuzhiyun {
86*4882a593Smuzhiyun int ret;
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun ret = spi_register_driver(&da9052_spi_driver);
89*4882a593Smuzhiyun if (ret != 0) {
90*4882a593Smuzhiyun pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
91*4882a593Smuzhiyun return ret;
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun return 0;
95*4882a593Smuzhiyun }
96*4882a593Smuzhiyun subsys_initcall(da9052_spi_init);
97*4882a593Smuzhiyun
da9052_spi_exit(void)98*4882a593Smuzhiyun static void __exit da9052_spi_exit(void)
99*4882a593Smuzhiyun {
100*4882a593Smuzhiyun spi_unregister_driver(&da9052_spi_driver);
101*4882a593Smuzhiyun }
102*4882a593Smuzhiyun module_exit(da9052_spi_exit);
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
105*4882a593Smuzhiyun MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
106*4882a593Smuzhiyun MODULE_LICENSE("GPL");
107