Re: [PATCH 2/2] ASoC: DA7219: Implement error check on reg read and write

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, Dec 05, 2018 at 10:21:04AM +0000, Adam Thomson wrote:

> If the previous I2C access failed, how can we be sure that the write back to HW
> of 0xFF even succeeds? More importantly these error returns won't necessarily
> stop subsequent calls to controls within the Codec I believe, so you could still
> see unwanted writes to HW via I2C, if I2C is sporadically operational. Again I
> don't see this update resolving that. The key thing is to resolve why even just
> one I2C transaction fails.

Right, it's just not clear what we can constructively do if the I2C bus
falls to bits other than log things and the I2C controllers will
generally do that themselves.  There's no guarantee what made it
through to the device or what will in future make it through to the
device.

Attachment: signature.asc
Description: PGP signature

_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

[Index of Archives]     [ALSA User]     [Linux Audio Users]     [Pulse Audio]     [Kernel Archive]     [Asterisk PBX]     [Photo Sharing]     [Linux Sound]     [Video 4 Linux]     [Gimp]     [Yosemite News]

  Powered by Linux