sound/soc/codecs/adau7118-i2c.c

   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
  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
  51 static int adau7118_probe_i2c(struct i2c_client *i2c,
  52                               const struct i2c_device_id *id)
  53 {
  54         struct regmap *map;
  55
  56         map = devm_regmap_init_i2c(i2c, &adau7118_regmap_config);
  57         if (IS_ERR(map)) {
  58                 dev_err(&i2c->dev, "Failed to init regmap %ld\n", PTR_ERR(map));
  59                 return PTR_ERR(map);
  60         }
  61
  62         return adau7118_probe(&i2c->dev, map, false);
  63 }
  64
  65 static const struct of_device_id adau7118_of_match[] = {
  66         { .compatible = "adi,adau7118" },
  67         {}
  68 };
  69 MODULE_DEVICE_TABLE(of, adau7118_of_match);
  70
  71 static const struct i2c_device_id adau7118_id[] = {
  72         {"adau7118", 0},
  73         {}
  74 };
  75 MODULE_DEVICE_TABLE(i2c, adau7118_id);
  76
  77 static struct i2c_driver adau7118_driver = {
  78         .driver = {
  79                 .name = "adau7118",
  80                 .of_match_table = adau7118_of_match,
  81         },
  82         .probe = adau7118_probe_i2c,
  83         .id_table = adau7118_id,
  84 };
  85 module_i2c_driver(adau7118_driver);
  86
  87 MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>");
  88 MODULE_DESCRIPTION("ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C");
  89 MODULE_LICENSE("GPL");