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(sdev: spi); |
24 | struct da9052 *da9052; |
25 | |
26 | da9052 = devm_kzalloc(dev: &spi->dev, size: 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, data: 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(ptr: da9052->regmap)) { |
49 | ret = PTR_ERR(ptr: 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, chip_id: 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(sdrv: &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 | |