On 13 July 2017 at 00:16, Zhoujie Wu <zjwu@xxxxxxxxxxx> wrote: > From: Hu Ziji <huziji@xxxxxxxxxxx> > > Add Xenon specific system-level suspend and resume support. > Especially during resume, re-configure Xenon specific registers > since registers setting will be lost in suspend if Xenon is power off. I recommend to start with deploying runtime PM support instead of system PM support. Then on top of such change, you should make use of the runtime PM centric path to get system sleep support for "free" (and thus all the nice benefits). Please have a look at sdhci-of-at91 for a good reference. Regarding sdhci-of-at91, there is currently a patch [1], which adds dealing with restoring context of registers after a system resume. Similar to what you need. Kind regards Uffe [1] https://patchwork.kernel.org/patch/9837951/ [...] Kind regards Uffe -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
