text: // SPDX-License-Identifier: GPL-2.0
  //
  // Analog Devices ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C
  //
  // Copyright 2019 Analog Devices Inc.
  
  #include <linux/i2c.h>
  #include <linux/module.h>
  #include <linux/regmap.h>
  
  #include "adau7118.h"
  
  static const struct reg_default adau7118_reg_defaults[] = {
  	{ ADAU7118_REG_VENDOR_ID, 0x41 },
  	{ ADAU7118_REG_DEVICE_ID1, 0x71 },
  	{ ADAU7118_REG_DEVICE_ID2, 0x18 },
  	{ ADAU7118_REG_REVISION_ID, 0x00 },
  	{ ADAU7118_REG_ENABLES, 0x3F },
  	{ ADAU7118_REG_DEC_RATIO_CLK_MAP, 0xC0 },
  	{ ADAU7118_REG_HPF_CONTROL, 0xD0 },
  	{ ADAU7118_REG_SPT_CTRL1, 0x41 },
  	{ ADAU7118_REG_SPT_CTRL2, 0x00 },
  	{ ADAU7118_REG_SPT_CX(0), 0x01 },
  	{ ADAU7118_REG_SPT_CX(1), 0x11 },
  	{ ADAU7118_REG_SPT_CX(2), 0x21 },
  	{ ADAU7118_REG_SPT_CX(3), 0x31 },
  	{ ADAU7118_REG_SPT_CX(4), 0x41 },
  	{ ADAU7118_REG_SPT_CX(5), 0x51 },
  	{ ADAU7118_REG_SPT_CX(6), 0x61 },
  	{ ADAU7118_REG_SPT_CX(7), 0x71 },
  	{ ADAU7118_REG_DRIVE_STRENGTH, 0x2a },
  	{ ADAU7118_REG_RESET, 0x00 },
  };
  
  static const struct regmap_config adau7118_regmap_config = {
  	.reg_bits = 8,
  	.val_bits = 8,
  	.reg_defaults = adau7118_reg_defaults,
  	.num_reg_defaults = ARRAY_SIZE(adau7118_reg_defaults),
  	.cache_type = REGCACHE_RBTREE,
  	.max_register = ADAU7118_REG_RESET,
  };
  
  static int adau7118_probe_i2c(struct i2c_client *i2c,
  			      const struct i2c_device_id *id)
  {
  	struct regmap *map;
  
  	map = devm_regmap_init_i2c(i2c, &adau7118_regmap_config);
  	if (IS_ERR(map)) {
  		dev_err(&i2c->dev, "Failed to init regmap %ld\n", PTR_ERR(map));
  		return PTR_ERR(map);
  	}
  
  	return adau7118_probe(&i2c->dev, map, false);
  }
  
  static const struct of_device_id adau7118_of_match[] = {
  	{ .compatible = "adi,adau7118" },
  	{}
  };
  MODULE_DEVICE_TABLE(of, adau7118_of_match);
  
  static const struct i2c_device_id adau7118_id[] = {
  	{"adau7118", 0},
  	{}
  };
  MODULE_DEVICE_TABLE(i2c, adau7118_id);
  
  static struct i2c_driver adau7118_driver = {
  	.driver = {
  		.name = "adau7118",
  		.of_match_table = adau7118_of_match,
  	},
  	.probe = adau7118_probe_i2c,
  	.id_table = adau7118_id,
  };
  module_i2c_driver(adau7118_driver);
  
  MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>");
  MODULE_DESCRIPTION("ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C");
  MODULE_LICENSE("GPL");
  