1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Driver for ADAU1361/ADAU1461/ADAU1761/ADAU1961 codec
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2014 Analog Devices Inc.
6*4882a593Smuzhiyun * Author: Lars-Peter Clausen <lars@metafoo.de>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/mod_devicetable.h>
10*4882a593Smuzhiyun #include <linux/module.h>
11*4882a593Smuzhiyun #include <linux/regmap.h>
12*4882a593Smuzhiyun #include <linux/spi/spi.h>
13*4882a593Smuzhiyun #include <sound/soc.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "adau1761.h"
16*4882a593Smuzhiyun
adau1761_spi_switch_mode(struct device * dev)17*4882a593Smuzhiyun static void adau1761_spi_switch_mode(struct device *dev)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun struct spi_device *spi = to_spi_device(dev);
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /*
22*4882a593Smuzhiyun * To get the device into SPI mode CLATCH has to be pulled low three
23*4882a593Smuzhiyun * times. Do this by issuing three dummy reads.
24*4882a593Smuzhiyun */
25*4882a593Smuzhiyun spi_w8r8(spi, 0x00);
26*4882a593Smuzhiyun spi_w8r8(spi, 0x00);
27*4882a593Smuzhiyun spi_w8r8(spi, 0x00);
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun
adau1761_spi_probe(struct spi_device * spi)30*4882a593Smuzhiyun static int adau1761_spi_probe(struct spi_device *spi)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun const struct spi_device_id *id = spi_get_device_id(spi);
33*4882a593Smuzhiyun struct regmap_config config;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun if (!id)
36*4882a593Smuzhiyun return -EINVAL;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun config = adau1761_regmap_config;
39*4882a593Smuzhiyun config.val_bits = 8;
40*4882a593Smuzhiyun config.reg_bits = 24;
41*4882a593Smuzhiyun config.read_flag_mask = 0x1;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun return adau1761_probe(&spi->dev,
44*4882a593Smuzhiyun devm_regmap_init_spi(spi, &config),
45*4882a593Smuzhiyun id->driver_data, adau1761_spi_switch_mode);
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
adau1761_spi_remove(struct spi_device * spi)48*4882a593Smuzhiyun static int adau1761_spi_remove(struct spi_device *spi)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun adau17x1_remove(&spi->dev);
51*4882a593Smuzhiyun return 0;
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun static const struct spi_device_id adau1761_spi_id[] = {
55*4882a593Smuzhiyun { "adau1361", ADAU1361 },
56*4882a593Smuzhiyun { "adau1461", ADAU1761 },
57*4882a593Smuzhiyun { "adau1761", ADAU1761 },
58*4882a593Smuzhiyun { "adau1961", ADAU1361 },
59*4882a593Smuzhiyun { }
60*4882a593Smuzhiyun };
61*4882a593Smuzhiyun MODULE_DEVICE_TABLE(spi, adau1761_spi_id);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun #if defined(CONFIG_OF)
64*4882a593Smuzhiyun static const struct of_device_id adau1761_spi_dt_ids[] = {
65*4882a593Smuzhiyun { .compatible = "adi,adau1361", },
66*4882a593Smuzhiyun { .compatible = "adi,adau1461", },
67*4882a593Smuzhiyun { .compatible = "adi,adau1761", },
68*4882a593Smuzhiyun { .compatible = "adi,adau1961", },
69*4882a593Smuzhiyun { },
70*4882a593Smuzhiyun };
71*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, adau1761_spi_dt_ids);
72*4882a593Smuzhiyun #endif
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun static struct spi_driver adau1761_spi_driver = {
75*4882a593Smuzhiyun .driver = {
76*4882a593Smuzhiyun .name = "adau1761",
77*4882a593Smuzhiyun .of_match_table = of_match_ptr(adau1761_spi_dt_ids),
78*4882a593Smuzhiyun },
79*4882a593Smuzhiyun .probe = adau1761_spi_probe,
80*4882a593Smuzhiyun .remove = adau1761_spi_remove,
81*4882a593Smuzhiyun .id_table = adau1761_spi_id,
82*4882a593Smuzhiyun };
83*4882a593Smuzhiyun module_spi_driver(adau1761_spi_driver);
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun MODULE_DESCRIPTION("ASoC ADAU1361/ADAU1461/ADAU1761/ADAU1961 CODEC SPI driver");
86*4882a593Smuzhiyun MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
87*4882a593Smuzhiyun MODULE_LICENSE("GPL");
88