[alsa-devel] [PATCH] [ALSA] Allow setting codec register with sys filesystem

Mark Brown broonie at sirena.org.uk
Mon Oct 6 11:58:57 CEST 2008

On Sat, Oct 04, 2008 at 04:54:09PM -0700, Troy Kisky wrote:
> i.e. echo 6 59 >/sys/devices/platform/soc-audio.0/codec_reg
> will set register 0x06 to a value of 0x59

> Signed-off-by: Troy Kisky <troy.kisky at boundarydevices.com>

I'd probably take a patch to do this in debugfs but I don't think it is
appropriate to do this in sysfs.  Writing to the registers outside the
control of the drivers can seriously interfere with their operation and
confuse user space - it's something you can get away with if you know
what you're doing but it's not something that should be available as a
standard, advertised interface.  There's also the possibility of the
driver trampling over any settings made with this interface which
wouldn't be helpful either.

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