// SPDX-License-Identifier: GPL-2.0-only /* * Driver for ADAU1372 codec * * Copyright 2016 Analog Devices Inc. * Author: Lars-Peter Clausen <lars@metafoo.de> */ #include <linux/module.h> #include <linux/regmap.h> #include <linux/spi/spi.h> #include <sound/soc.h> #include "adau1372.h" static void adau1372_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 adau1372_spi_probe(struct spi_device *spi) { struct regmap_config config; config = adau1372_regmap_config; config.read_flag_mask = 0x1; return adau1372_probe(&spi->dev, devm_regmap_init_spi(spi, &config), adau1372_spi_switch_mode); } static const struct spi_device_id adau1372_spi_id[] = { { "adau1372", 0 }, { } }; MODULE_DEVICE_TABLE(spi, adau1372_spi_id); static struct spi_driver adau1372_spi_driver = { .driver = { .name = "adau1372", .of_match_table = adau1372_of_match, }, .probe = adau1372_spi_probe, .id_table = adau1372_spi_id, }; module_spi_driver(adau1372_spi_driver); MODULE_DESCRIPTION("ASoC ADAU1372 CODEC SPI driver"); MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); MODULE_LICENSE("GPL v2");