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