[alsa-devel] Is that reasonable to support pinctrl PM in ASoC core?
b42378 at freescale.com
Thu Oct 24 13:07:43 CEST 2013
It's quite popular that more drivers are using pinctrl PM, for example:
(Documentation/devicetree/bindings/arm/primecell.txt). Just like what
runtime PM does, it would de-active and en-active pin group depending
on whether it's being used or not.
And I think this pinctrl PM might be also beneficial to cpu dai drivers
since they might have actual pins, and they can hypnotize/wake them up
along with runtime PM:
@@ -183,6 +183,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
int ret = 0;
As pinctrl PM is also reference counted and would return 0 if there
is no pinctrl settings, this would not break current ASoC subsystem
and any cpu dai driver.
So I just want to ask if it's reasonable to add it. Or another one:
is there anything similar to sleep pins? Although I've searched the
whole ./sound directory, it seems no drivers under it is using this
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