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74 lines
1.6 KiB
74 lines
1.6 KiB
/* |
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* Driver for ADAU1381/ADAU1781 CODEC |
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* |
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* Copyright 2014 Analog Devices Inc. |
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* Author: Lars-Peter Clausen <lars@metafoo.de> |
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* |
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* Licensed under the GPL-2. |
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*/ |
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#include <linux/mod_devicetable.h> |
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#include <linux/module.h> |
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#include <linux/regmap.h> |
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#include <linux/spi/spi.h> |
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#include <sound/soc.h> |
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#include "adau1781.h" |
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static void adau1781_spi_switch_mode(struct device *dev) |
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{ |
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struct spi_device *spi = to_spi_device(dev); |
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/* |
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* To get the device into SPI mode CLATCH has to be pulled low three |
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* times. Do this by issuing three dummy reads. |
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*/ |
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spi_w8r8(spi, 0x00); |
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spi_w8r8(spi, 0x00); |
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spi_w8r8(spi, 0x00); |
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} |
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static int adau1781_spi_probe(struct spi_device *spi) |
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{ |
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const struct spi_device_id *id = spi_get_device_id(spi); |
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struct regmap_config config; |
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if (!id) |
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return -EINVAL; |
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config = adau1781_regmap_config; |
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config.val_bits = 8; |
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config.reg_bits = 24; |
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config.read_flag_mask = 0x1; |
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return adau1781_probe(&spi->dev, |
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devm_regmap_init_spi(spi, &config), |
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id->driver_data, adau1781_spi_switch_mode); |
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} |
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static int adau1781_spi_remove(struct spi_device *spi) |
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{ |
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snd_soc_unregister_codec(&spi->dev); |
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return 0; |
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} |
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static const struct spi_device_id adau1781_spi_id[] = { |
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{ "adau1381", ADAU1381 }, |
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{ "adau1781", ADAU1781 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(spi, adau1781_spi_id); |
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static struct spi_driver adau1781_spi_driver = { |
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.driver = { |
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.name = "adau1781", |
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}, |
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.probe = adau1781_spi_probe, |
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.remove = adau1781_spi_remove, |
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.id_table = adau1781_spi_id, |
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}; |
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module_spi_driver(adau1781_spi_driver); |
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MODULE_DESCRIPTION("ASoC ADAU1381/ADAU1781 CODEC SPI driver"); |
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); |
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MODULE_LICENSE("GPL");
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