Hi,
* Peter Ujfalusi peter.ujfalusi@ti.com [191025 13:05]:
McPDM module receives it's functional clock from external source. This clock is the pdmclk provided by the twl6040 audio IC. If the clock is not available all register accesses to McPDM fails and the module is not operational.
this has been lurking in my next-wip branch for some time... It might not needed anymore as I have not heard about issues with McPDM for a while.
It was dropped back then because some core parts were not picked in time and this caused some issues, but can not find the exact reason
Yes it's a strange solution to clock the internal mcpdm module externally :)
AFAIK it's now already handled properly by ti-sysc. We have a common omap4-mcpdm.dtsi configure mcpdm clock forthe module, then ti-sysc driver defers probe until the mcpdm clock is available. And for omap5 we have omap5-board-common.dtsi configure it.
So probably the only thing omap-mcpdm.c driver needs to do is to call PM runtime functions, maybe it's already doing that.
Regards,
Tony