/* * Driver for ADAU1381/ADAU1781 CODEC * * Copyright 2014 Analog Devices Inc. * Author: Lars-Peter Clausen <lars@metafoo.de> * * Licensed under the GPL-2. */ #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/regmap.h> #include <linux/spi/spi.h> #include <sound/soc.h> #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) { adau17x1_remove(&spi->dev); return 0; } static const struct spi_device_id adau1781_spi_id[] = { { "adau1381", ADAU1381 }, { "adau1781", ADAU1781 }, { } }; MODULE_DEVICE_TABLE(spi, adau1781_spi_id); #if defined(CONFIG_OF) static const struct of_device_id adau1781_spi_dt_ids[] = { { .compatible = "adi,adau1381", }, { .compatible = "adi,adau1781", }, { }, }; MODULE_DEVICE_TABLE(of, adau1781_spi_dt_ids); #endif static struct spi_driver adau1781_spi_driver = { .driver = { .name = "adau1781", .of_match_table = of_match_ptr(adau1781_spi_dt_ids), }, .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 <lars@metafoo.de>"); MODULE_LICENSE("GPL");