On Mon, 9 Feb 2015 16:18:44 -0800 Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > + /* Platform read function, else default if mmio setup */ > > + if (pdata->plat_read) > > + rtc->read = pdata->plat_read; > > I'm trying to understand how this works and I'm not getting very far. oop, never mind, it's there in patch 2/2.