90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Analog Devices ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C
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//
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// Copyright 2019 Analog Devices Inc.
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include "adau7118.h"
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static const struct reg_default adau7118_reg_defaults[] = {
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{ ADAU7118_REG_VENDOR_ID, 0x41 },
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{ ADAU7118_REG_DEVICE_ID1, 0x71 },
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{ ADAU7118_REG_DEVICE_ID2, 0x18 },
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{ ADAU7118_REG_REVISION_ID, 0x00 },
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{ ADAU7118_REG_ENABLES, 0x3F },
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{ ADAU7118_REG_DEC_RATIO_CLK_MAP, 0xC0 },
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{ ADAU7118_REG_HPF_CONTROL, 0xD0 },
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{ ADAU7118_REG_SPT_CTRL1, 0x41 },
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{ ADAU7118_REG_SPT_CTRL2, 0x00 },
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{ ADAU7118_REG_SPT_CX(0), 0x01 },
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{ ADAU7118_REG_SPT_CX(1), 0x11 },
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{ ADAU7118_REG_SPT_CX(2), 0x21 },
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{ ADAU7118_REG_SPT_CX(3), 0x31 },
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{ ADAU7118_REG_SPT_CX(4), 0x41 },
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{ ADAU7118_REG_SPT_CX(5), 0x51 },
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{ ADAU7118_REG_SPT_CX(6), 0x61 },
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{ ADAU7118_REG_SPT_CX(7), 0x71 },
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{ ADAU7118_REG_DRIVE_STRENGTH, 0x2a },
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{ ADAU7118_REG_RESET, 0x00 },
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};
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static bool adau7118_volatile(struct device *dev, unsigned int reg)
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{
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return (reg == ADAU7118_REG_RESET);
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}
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static const struct regmap_config adau7118_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.reg_defaults = adau7118_reg_defaults,
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.num_reg_defaults = ARRAY_SIZE(adau7118_reg_defaults),
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.cache_type = REGCACHE_RBTREE,
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.max_register = ADAU7118_REG_RESET,
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.volatile_reg = adau7118_volatile,
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};
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static int adau7118_probe_i2c(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct regmap *map;
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map = devm_regmap_init_i2c(i2c, &adau7118_regmap_config);
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if (IS_ERR(map)) {
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dev_err(&i2c->dev, "Failed to init regmap %ld\n", PTR_ERR(map));
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return PTR_ERR(map);
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}
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return adau7118_probe(&i2c->dev, map, false);
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}
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static const struct of_device_id adau7118_of_match[] = {
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{ .compatible = "adi,adau7118" },
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{}
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};
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MODULE_DEVICE_TABLE(of, adau7118_of_match);
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static const struct i2c_device_id adau7118_id[] = {
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{"adau7118", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, adau7118_id);
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static struct i2c_driver adau7118_driver = {
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.driver = {
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.name = "adau7118",
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.of_match_table = adau7118_of_match,
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},
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.probe = adau7118_probe_i2c,
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.id_table = adau7118_id,
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};
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module_i2c_driver(adau7118_driver);
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MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>");
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MODULE_DESCRIPTION("ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C");
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MODULE_LICENSE("GPL");
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