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[ALSA] ALSA sound driver for the AT73C213 DAC using Atmel SSC driver

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This patch adds support for the AT73C213 DAC using the misc Atmel SSC driver in
I2S mode. The driver also requires a SPI to setup the registers and control
volume.
It has been tested with an AT32AP7000 on the ATSTK1000 development board. The
driver should also work with any Atmel device with an SSC module supported by
the Atmel SSC driver (atmel-ssc).
The atmel-ssc driver is just submitted to the Linux kernel. Please see mail
thread http://lkml.org/lkml/2007/7/16/32

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Hans-Christian Egtvedt 2007-07-23 16:01:38 +02:00 • committed by Jaroslav Kysela
parent 3b0a899ca0
commit eafe570847
5 changed files with 1301 additions and 0 deletions
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25
include/linux/spi/at73c213.h Normal file
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/*
* Board-specific data used to set up AT73c213 audio DAC driver.
*/
#ifndef __LINUX_SPI_AT73C213_H
#define __LINUX_SPI_AT73C213_H
/**
* at73c213_board_info - how the external DAC is wired to the device.
*
* @ssc_id: SSC platform_driver id the DAC shall use to stream the audio.
* @dac_clk: the external clock used to provide master clock to the DAC.
* @shortname: a short discription for the DAC, seen by userspace tools.
*
* This struct contains the configuration of the hardware connection to the
* external DAC. The DAC needs a master clock and a I2S audio stream. It also
* provides a name which is used to identify it in userspace tools.
*/
struct at73c213_board_info {
int ssc_id;
struct clk *dac_clk;
char shortname[32];
};
#endif /* __LINUX_SPI_AT73C213_H */