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1// SPDX-License-Identifier: GPL-2.02//3// Analog Devices ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C4//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_MAPLE,47 .max_register = ADAU7118_REG_RESET,48 .volatile_reg = adau7118_volatile,49};50 51static 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 64static const struct of_device_id adau7118_of_match[] = {65 { .compatible = "adi,adau7118" },66 {}67};68MODULE_DEVICE_TABLE(of, adau7118_of_match);69 70static const struct i2c_device_id adau7118_id[] = {71 {"adau7118"},72 {}73};74MODULE_DEVICE_TABLE(i2c, adau7118_id);75 76static struct i2c_driver adau7118_driver = {77 .driver = {78 .name = "adau7118",79 .of_match_table = adau7118_of_match,80 },81 .probe = adau7118_probe_i2c,82 .id_table = adau7118_id,83};84module_i2c_driver(adau7118_driver);85 86MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>");87MODULE_DESCRIPTION("ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C");88MODULE_LICENSE("GPL");89