LXR linux/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
  13static 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
  35static bool adau7118_volatile(struct device *dev, unsigned int reg)
  36{
  37        return (reg == ADAU7118_REG_RESET);
  38}
  39
  40
  41static 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
  51static 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
  65static const struct of_device_id adau7118_of_match[] = {
  66        { .compatible = "adi,adau7118" },
  67        {}
  68};
  69MODULE_DEVICE_TABLE(of, adau7118_of_match);
  70
  71static const struct i2c_device_id adau7118_id[] = {
  72        {"adau7118", 0},
  73        {}
  74};
  75MODULE_DEVICE_TABLE(i2c, adau7118_id);
  76
  77static 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};
  85module_i2c_driver(adau7118_driver);
  86
  87MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>");
  88MODULE_DESCRIPTION("ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C");
  89MODULE_LICENSE("GPL");
  90