[alsa-devel] [PATCH] sh: add SuperH DAC audio driver for ALSA V4

Paul Mundt lethal at linux-sh.org
Wed Nov 4 04:13:09 CET 2009

On Tue, Nov 03, 2009 at 05:16:27PM -0300, Rafael Ignacio Zurita wrote:
> This is a port of the sound/oss/sh_dac_audio.c driver.
> The driver uses an on-chip 8-bit D/A converter, which has a speaker connected
> to one of its channels, found in several ancient HP machines.
> For interrupts it uses a high-resolution timer (hrtimer).
> Tested on SH7709 based hp6xx (HP Jornada 680/690 and HP Palmtop 620lx/660lx).
> Also, since OSS Emulation works, the old OSS sound/oss/sh_dac_audio.c driver
> would be obsolete soon, and it could be removed.
> Changes since V3:
>  - renamed sound/sh/snd_sh_dac_audio.c to sound/sh/sh_dac_audio.c
> Changes since V2:
>  - renamed include/sound/dac_audio.h to include/sound/sh_dac_audio.h
> Changes since V1:
>  - moved the platform device code into board code.
>  - dropped dac_audio_sync(), since that code is not needed (it was inherited of
>    the old oss driver).
>  - rewrote the code with style problems.
> Signed-off-by: Rafael Ignacio Zurita <rizurita at yahoo.com>

Acked-by: Paul Mundt <lethal at linux-sh.org>

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