1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Driver for ADAU1381/ADAU1781 CODEC |
4 | * |
5 | * Copyright 2014 Analog Devices Inc. |
6 | * Author: Lars-Peter Clausen <lars@metafoo.de> |
7 | */ |
8 | |
9 | #include <linux/mod_devicetable.h> |
10 | #include <linux/module.h> |
11 | #include <linux/regmap.h> |
12 | #include <linux/spi/spi.h> |
13 | #include <sound/soc.h> |
14 | |
15 | #include "adau1781.h" |
16 | |
17 | static void adau1781_spi_switch_mode(struct device *dev) |
18 | { |
19 | struct spi_device *spi = to_spi_device(dev); |
20 | |
21 | /* |
22 | * To get the device into SPI mode CLATCH has to be pulled low three |
23 | * times. Do this by issuing three dummy reads. |
24 | */ |
25 | spi_w8r8(spi, cmd: 0x00); |
26 | spi_w8r8(spi, cmd: 0x00); |
27 | spi_w8r8(spi, cmd: 0x00); |
28 | } |
29 | |
30 | static int adau1781_spi_probe(struct spi_device *spi) |
31 | { |
32 | const struct spi_device_id *id = spi_get_device_id(sdev: spi); |
33 | struct regmap_config config; |
34 | |
35 | if (!id) |
36 | return -EINVAL; |
37 | |
38 | config = adau1781_regmap_config; |
39 | config.val_bits = 8; |
40 | config.reg_bits = 24; |
41 | config.read_flag_mask = 0x1; |
42 | |
43 | return adau1781_probe(dev: &spi->dev, |
44 | devm_regmap_init_spi(spi, &config), |
45 | type: id->driver_data, switch_mode: adau1781_spi_switch_mode); |
46 | } |
47 | |
48 | static void adau1781_spi_remove(struct spi_device *spi) |
49 | { |
50 | adau17x1_remove(dev: &spi->dev); |
51 | } |
52 | |
53 | static const struct spi_device_id adau1781_spi_id[] = { |
54 | { "adau1381" , ADAU1381 }, |
55 | { "adau1781" , ADAU1781 }, |
56 | { } |
57 | }; |
58 | MODULE_DEVICE_TABLE(spi, adau1781_spi_id); |
59 | |
60 | #if defined(CONFIG_OF) |
61 | static const struct of_device_id adau1781_spi_dt_ids[] = { |
62 | { .compatible = "adi,adau1381" , }, |
63 | { .compatible = "adi,adau1781" , }, |
64 | { }, |
65 | }; |
66 | MODULE_DEVICE_TABLE(of, adau1781_spi_dt_ids); |
67 | #endif |
68 | |
69 | static struct spi_driver adau1781_spi_driver = { |
70 | .driver = { |
71 | .name = "adau1781" , |
72 | .of_match_table = of_match_ptr(adau1781_spi_dt_ids), |
73 | }, |
74 | .probe = adau1781_spi_probe, |
75 | .remove = adau1781_spi_remove, |
76 | .id_table = adau1781_spi_id, |
77 | }; |
78 | module_spi_driver(adau1781_spi_driver); |
79 | |
80 | MODULE_DESCRIPTION("ASoC ADAU1381/ADAU1781 CODEC SPI driver" ); |
81 | MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>" ); |
82 | MODULE_LICENSE("GPL" ); |
83 | |