[PATCH v2 2/2] arm: omap3: am35x: Disable hlt when using Davinci EMAC

Kevin Hilman khilman at ti.com
Thu May 31 14:58:43 EDT 2012


"Mark A. Greer" <mgreer at animalcreek.com> writes:

> From: "Mark A. Greer" <mgreer at animalcreek.com>
>
> The am35x family of SoCs has a Davinci EMAC ethernet
> controller on-chip.  Unfortunately, the EMAC is unable
> to wake the PRCM when there is network activity which
> leads to a hung or extremely slow system when the MPU
> has executed a 'wfi' instruction (because of pm_idle
> or CPUidle).  To prevent this, add hooks to the EMAC
> pm_runtime suspend/resume calls so that hlt is disabled
> whenever the EMAC is in use.
>
> Signed-off-by: Mark A. Greer <mgreer at animalcreek.com>

Looks good,

Acked-by: Kevin Hilman <khilman at ti.com>




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