[alsa-devel] [PATCH] ALSA: ASoC: add codec driver for TI TAS5086

[jonsmirl at gmail.com]

On Fri, Mar 8, 2013 at 6:07 AM, Daniel Mack <zonque at gmail.com> wrote:
> This patch adds a driver for TI's TA5086 6-channel PWM processor.
>
> This chip has a very unusual register layout, specifically because the
> registers are of unequal size, and multi-byte registers require bulk
> writes to take effect. Regmap does not support these kind of mappings.
>
> Currently, the driver does not touch any of the registers >= 0x20, so
> it doesn't matter, because the register map is mapped to an 8-bit array.
> In case more features will be added in the future that require access
> to higher registers, the entire regmap H/W I/O routines have to be
> open-coded.

Check out my tas5504 driver from a long time ago. It dealt with those registers.

https://github.com/jonsmirl/mpc5200/blob/master/sound/soc/codecs/tas5504.c
https://github.com/jonsmirl/mpc5200/blob/master/sound/soc/codecs/tas5504.h

--
Jon Smirl
jonsmirl at gmail.com