| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | // |
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| 3 | // Analog Devices ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C |
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| 4 | // |
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| 5 | // Copyright 2019 Analog Devices Inc. |
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| 6 | |
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| 7 | #include <linux/i2c.h> |
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| 8 | #include <linux/module.h> |
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| 9 | #include <linux/regmap.h> |
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| 10 | |
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| 11 | #include "adau7118.h" |
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| 12 | |
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| 13 | static const struct reg_default adau7118_reg_defaults[] = { |
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| 14 | { ADAU7118_REG_VENDOR_ID, 0x41 }, |
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| 15 | { ADAU7118_REG_DEVICE_ID1, 0x71 }, |
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| 16 | { ADAU7118_REG_DEVICE_ID2, 0x18 }, |
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| 17 | { ADAU7118_REG_REVISION_ID, 0x00 }, |
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| 18 | { ADAU7118_REG_ENABLES, 0x3F }, |
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| 19 | { ADAU7118_REG_DEC_RATIO_CLK_MAP, 0xC0 }, |
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| 20 | { ADAU7118_REG_HPF_CONTROL, 0xD0 }, |
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| 21 | { ADAU7118_REG_SPT_CTRL1, 0x41 }, |
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| 22 | { ADAU7118_REG_SPT_CTRL2, 0x00 }, |
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| 23 | { ADAU7118_REG_SPT_CX(0), 0x01 }, |
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| 24 | { ADAU7118_REG_SPT_CX(1), 0x11 }, |
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| 25 | { ADAU7118_REG_SPT_CX(2), 0x21 }, |
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| 26 | { ADAU7118_REG_SPT_CX(3), 0x31 }, |
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| 27 | { ADAU7118_REG_SPT_CX(4), 0x41 }, |
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| 28 | { ADAU7118_REG_SPT_CX(5), 0x51 }, |
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| 29 | { ADAU7118_REG_SPT_CX(6), 0x61 }, |
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| 30 | { ADAU7118_REG_SPT_CX(7), 0x71 }, |
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| 31 | { ADAU7118_REG_DRIVE_STRENGTH, 0x2a }, |
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| 32 | { ADAU7118_REG_RESET, 0x00 }, |
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| 33 | }; |
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| 34 | |
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| 35 | static bool adau7118_volatile(struct device *dev, unsigned int reg) |
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| 36 | { |
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| 37 | return (reg == ADAU7118_REG_RESET); |
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| 38 | } |
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| 39 | |
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| 40 | |
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| 41 | static const struct regmap_config adau7118_regmap_config = { |
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| 42 | .reg_bits = 8, |
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| 43 | .val_bits = 8, |
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| 44 | .reg_defaults = adau7118_reg_defaults, |
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| 45 | .num_reg_defaults = ARRAY_SIZE(adau7118_reg_defaults), |
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| 46 | .cache_type = REGCACHE_MAPLE, |
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| 47 | .max_register = ADAU7118_REG_RESET, |
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| 48 | .volatile_reg = adau7118_volatile, |
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| 49 | }; |
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| 50 | |
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| 51 | static int adau7118_probe_i2c(struct i2c_client *i2c) |
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| 52 | { |
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| 53 | struct regmap *map; |
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| 54 | |
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| 55 | map = devm_regmap_init_i2c(i2c, &adau7118_regmap_config); |
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| 56 | if (IS_ERR(ptr: map)) { |
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| 57 | dev_err(&i2c->dev, "Failed to init regmap %ld\n" , PTR_ERR(map)); |
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| 58 | return PTR_ERR(ptr: map); |
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| 59 | } |
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| 60 | |
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| 61 | return adau7118_probe(dev: &i2c->dev, map, hw_mode: false); |
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| 62 | } |
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| 63 | |
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| 64 | static const struct of_device_id adau7118_of_match[] = { |
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| 65 | { .compatible = "adi,adau7118" }, |
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| 66 | {} |
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| 67 | }; |
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| 68 | MODULE_DEVICE_TABLE(of, adau7118_of_match); |
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| 69 | |
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| 70 | static const struct i2c_device_id adau7118_id[] = { |
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| 71 | {"adau7118" , 0}, |
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| 72 | {} |
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| 73 | }; |
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| 74 | MODULE_DEVICE_TABLE(i2c, adau7118_id); |
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| 75 | |
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| 76 | static struct i2c_driver adau7118_driver = { |
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| 77 | .driver = { |
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| 78 | .name = "adau7118" , |
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| 79 | .of_match_table = adau7118_of_match, |
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| 80 | }, |
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| 81 | .probe = adau7118_probe_i2c, |
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| 82 | .id_table = adau7118_id, |
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| 83 | }; |
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| 84 | module_i2c_driver(adau7118_driver); |
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| 85 | |
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| 86 | MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>" ); |
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| 87 | MODULE_DESCRIPTION("ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C" ); |
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| 88 | MODULE_LICENSE("GPL" ); |
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| 89 | |
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