linux-stable/sound/soc/codecs/rt5677-spi.h
Ben Zhang 7d4d443eb4 ASoC: rt5677: Allow arbitrary block read/write via SPI
Added rt5677_spi_read() and refactored rt5677_spi_write() so that
an arbitrary block in the DSP address space can be read/written
via SPI. For example, this allows us to load an ELF DSP firmware
with sparse sections, and stream audio samples from DSP ring buffer.

Signed-off-by: Ben Zhang <benzh@chromium.org>
Acked-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-25 17:34:30 +01:00

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/*
* rt5677-spi.h -- RT5677 ALSA SoC audio codec driver
*
* Copyright 2013 Realtek Semiconductor Corp.
* Author: Oder Chiou <oder_chiou@realtek.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __RT5677_SPI_H__
#define __RT5677_SPI_H__
int rt5677_spi_read(u32 addr, void *rxbuf, size_t len);
int rt5677_spi_write(u32 addr, const void *txbuf, size_t len);
int rt5677_spi_write_firmware(u32 addr, const struct firmware *fw);
#endif /* __RT5677_SPI_H__ */