[Letux-kernel] [PATCH v3 0/3] mach-omap2: handle autoidle denial

Tony Lindgren tony at atomide.com
Mon Jan 21 20:58:03 CET 2019


* Andreas Kemnade <andreas at kemnade.info> [190116 14:04]:
> On the gta04 with a dm3730 omap_hdq does not work properly when the
> device enters lower power states. Idling uart1 and 2 is enough
> to show up that problem, if there are no other things enabled.
> Further research reveals that hdq iclk must not be turned off during
> transfers, also according to the TRM. That fact is also correctly described
> in the flags but the code to handle that is incomplete.
> 
> To handle multiple users of a single ick, autoidle is disabled
> when a user of that ick requires that (has the OCPIF_SWSUP_IDLE))
> 
> Changes v3:
> - replace CLK_IS_BASIC
> 
> Changes v2:
> - uses spinlocks instead of mutexes
> - invert counter logic
> - check whether clock type is basic

For this series it's best to merge it all via the
clock tree along with the related clock patches:

Acked-by: Tony Lindgren <tony at atomide.com>


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