1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun //
3*4882a593Smuzhiyun // Analog Devices ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C
4*4882a593Smuzhiyun //
5*4882a593Smuzhiyun // Copyright 2019 Analog Devices Inc.
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <linux/i2c.h>
8*4882a593Smuzhiyun #include <linux/module.h>
9*4882a593Smuzhiyun #include <linux/regmap.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include "adau7118.h"
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun static const struct reg_default adau7118_reg_defaults[] = {
14*4882a593Smuzhiyun { ADAU7118_REG_VENDOR_ID, 0x41 },
15*4882a593Smuzhiyun { ADAU7118_REG_DEVICE_ID1, 0x71 },
16*4882a593Smuzhiyun { ADAU7118_REG_DEVICE_ID2, 0x18 },
17*4882a593Smuzhiyun { ADAU7118_REG_REVISION_ID, 0x00 },
18*4882a593Smuzhiyun { ADAU7118_REG_ENABLES, 0x3F },
19*4882a593Smuzhiyun { ADAU7118_REG_DEC_RATIO_CLK_MAP, 0xC0 },
20*4882a593Smuzhiyun { ADAU7118_REG_HPF_CONTROL, 0xD0 },
21*4882a593Smuzhiyun { ADAU7118_REG_SPT_CTRL1, 0x41 },
22*4882a593Smuzhiyun { ADAU7118_REG_SPT_CTRL2, 0x00 },
23*4882a593Smuzhiyun { ADAU7118_REG_SPT_CX(0), 0x01 },
24*4882a593Smuzhiyun { ADAU7118_REG_SPT_CX(1), 0x11 },
25*4882a593Smuzhiyun { ADAU7118_REG_SPT_CX(2), 0x21 },
26*4882a593Smuzhiyun { ADAU7118_REG_SPT_CX(3), 0x31 },
27*4882a593Smuzhiyun { ADAU7118_REG_SPT_CX(4), 0x41 },
28*4882a593Smuzhiyun { ADAU7118_REG_SPT_CX(5), 0x51 },
29*4882a593Smuzhiyun { ADAU7118_REG_SPT_CX(6), 0x61 },
30*4882a593Smuzhiyun { ADAU7118_REG_SPT_CX(7), 0x71 },
31*4882a593Smuzhiyun { ADAU7118_REG_DRIVE_STRENGTH, 0x2a },
32*4882a593Smuzhiyun { ADAU7118_REG_RESET, 0x00 },
33*4882a593Smuzhiyun };
34*4882a593Smuzhiyun
adau7118_volatile(struct device * dev,unsigned int reg)35*4882a593Smuzhiyun static bool adau7118_volatile(struct device *dev, unsigned int reg)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun return (reg == ADAU7118_REG_RESET);
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun static const struct regmap_config adau7118_regmap_config = {
42*4882a593Smuzhiyun .reg_bits = 8,
43*4882a593Smuzhiyun .val_bits = 8,
44*4882a593Smuzhiyun .reg_defaults = adau7118_reg_defaults,
45*4882a593Smuzhiyun .num_reg_defaults = ARRAY_SIZE(adau7118_reg_defaults),
46*4882a593Smuzhiyun .cache_type = REGCACHE_RBTREE,
47*4882a593Smuzhiyun .max_register = ADAU7118_REG_RESET,
48*4882a593Smuzhiyun .volatile_reg = adau7118_volatile,
49*4882a593Smuzhiyun };
50*4882a593Smuzhiyun
adau7118_probe_i2c(struct i2c_client * i2c,const struct i2c_device_id * id)51*4882a593Smuzhiyun static int adau7118_probe_i2c(struct i2c_client *i2c,
52*4882a593Smuzhiyun const struct i2c_device_id *id)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun struct regmap *map;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun map = devm_regmap_init_i2c(i2c, &adau7118_regmap_config);
57*4882a593Smuzhiyun if (IS_ERR(map)) {
58*4882a593Smuzhiyun dev_err(&i2c->dev, "Failed to init regmap %ld\n", PTR_ERR(map));
59*4882a593Smuzhiyun return PTR_ERR(map);
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun return adau7118_probe(&i2c->dev, map, false);
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun static const struct of_device_id adau7118_of_match[] = {
66*4882a593Smuzhiyun { .compatible = "adi,adau7118" },
67*4882a593Smuzhiyun {}
68*4882a593Smuzhiyun };
69*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, adau7118_of_match);
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun static const struct i2c_device_id adau7118_id[] = {
72*4882a593Smuzhiyun {"adau7118", 0},
73*4882a593Smuzhiyun {}
74*4882a593Smuzhiyun };
75*4882a593Smuzhiyun MODULE_DEVICE_TABLE(i2c, adau7118_id);
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun static struct i2c_driver adau7118_driver = {
78*4882a593Smuzhiyun .driver = {
79*4882a593Smuzhiyun .name = "adau7118",
80*4882a593Smuzhiyun .of_match_table = adau7118_of_match,
81*4882a593Smuzhiyun },
82*4882a593Smuzhiyun .probe = adau7118_probe_i2c,
83*4882a593Smuzhiyun .id_table = adau7118_id,
84*4882a593Smuzhiyun };
85*4882a593Smuzhiyun module_i2c_driver(adau7118_driver);
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>");
88*4882a593Smuzhiyun MODULE_DESCRIPTION("ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C");
89*4882a593Smuzhiyun MODULE_LICENSE("GPL");
90