On Wed, Aug 28, 2019 at 9:43 PM Maxime Ripard <[email protected]> wrote: > > On Wed, Aug 28, 2019 at 09:29:32PM +0800, Chen-Yu Tsai wrote: > > On Wed, Aug 28, 2019 at 8:52 PM Linus Walleij <[email protected]> > > wrote: > > > > > > On Sun, Aug 25, 2019 at 5:06 PM Alejandro González > > > <[email protected]> wrote: > > > > > > > Jernej Skrabec compared the BSP driver with this > > > > driver, and found that the BSP driver configures pinctrl to operate at > > > > 1.8 V when entering DDR mode (although 3.3 V operation is supported), > > > > while > > > > the mainline kernel lacks any mechanism to switch voltages dynamically. > > > > AFAIK The Pine H64 does not have the ability to switch I/O voltages. It is > > fixed to either 1.8V (the default based on the schematics) or 3.3V. > > Should that be handled at the board level then maybe?
Yeah. You'd specify which one using vqmmc-supply in the mmc node and vcc-pc-supply in the pinctrl node. ChenYu -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/CAGb2v67hS1a2iNJYgc97vwpg6hZwxjoxRhdMb5PjHmMrOC1jNA%40mail.gmail.com.
