On 20 September 2016 at 04:29, Ziyuan Xu <xzy.xu@xxxxxxxxxxxxxx> wrote: > hi Ulf, > > > On 2016年09月17日 16:49, Ulf Hansson wrote: >> >> On 17 September 2016 at 04:32, Ziyuan Xu <xzy.xu@xxxxxxxxxxxxxx> wrote: >>> >>> Add power domain as a optional property for sdhci-of-arasan, which can >>> be turned off in the so-called unused condition, such as suspend and >>> remove. Aim to lower power requirements. >> >> I assume runtime suspend make sense as well? > > > Sorry to reply this mail after a long time. > > On rk3399 platform, there is a eMMC-phy which is in charge of eMMC's logic > interface. We should guarantee that phy is ready before cmd/data transfer. > I mean that I need to consider about the resume latency, so that I can land > RPM for arasan-of-sdhci. > I intend to use auto-suspend for arasan-of-sdhci. > Okay! >> >> Moreover, perhaps you could share a little information here about what >> needs to be done at the driver level which controls the mmc IP. More >> precisely, what do you need to do at runtime_suspend, suspend, >> runtime_resume, and resume? > > > Invoke sdhci_runtime_suspend_host, disable relevant clock in > rumtime_suspend, deprocessing in runtime_resume. > Is that ok? Okay! [...] Thanks for sharing some more information, could you please re-spin with an updated change log? Kind regards Uffe -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
