From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- sound/soc/codecs/adau1781-spi.c | 75 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 sound/soc/codecs/adau1781-spi.c (limited to 'sound/soc/codecs/adau1781-spi.c') diff --git a/sound/soc/codecs/adau1781-spi.c b/sound/soc/codecs/adau1781-spi.c new file mode 100644 index 000000000..194686716 --- /dev/null +++ b/sound/soc/codecs/adau1781-spi.c @@ -0,0 +1,75 @@ +/* + * Driver for ADAU1381/ADAU1781 CODEC + * + * Copyright 2014 Analog Devices Inc. + * Author: Lars-Peter Clausen + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include + +#include "adau1781.h" + +static void adau1781_spi_switch_mode(struct device *dev) +{ + struct spi_device *spi = to_spi_device(dev); + + /* + * To get the device into SPI mode CLATCH has to be pulled low three + * times. Do this by issuing three dummy reads. + */ + spi_w8r8(spi, 0x00); + spi_w8r8(spi, 0x00); + spi_w8r8(spi, 0x00); +} + +static int adau1781_spi_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + struct regmap_config config; + + if (!id) + return -EINVAL; + + config = adau1781_regmap_config; + config.val_bits = 8; + config.reg_bits = 24; + config.read_flag_mask = 0x1; + + return adau1781_probe(&spi->dev, + devm_regmap_init_spi(spi, &config), + id->driver_data, adau1781_spi_switch_mode); +} + +static int adau1781_spi_remove(struct spi_device *spi) +{ + snd_soc_unregister_codec(&spi->dev); + return 0; +} + +static const struct spi_device_id adau1781_spi_id[] = { + { "adau1381", ADAU1381 }, + { "adau1781", ADAU1781 }, + { } +}; +MODULE_DEVICE_TABLE(spi, adau1781_spi_id); + +static struct spi_driver adau1781_spi_driver = { + .driver = { + .name = "adau1781", + .owner = THIS_MODULE, + }, + .probe = adau1781_spi_probe, + .remove = adau1781_spi_remove, + .id_table = adau1781_spi_id, +}; +module_spi_driver(adau1781_spi_driver); + +MODULE_DESCRIPTION("ASoC ADAU1381/ADAU1781 CODEC SPI driver"); +MODULE_AUTHOR("Lars-Peter Clausen "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3-54-g00ecf