On Fri, Nov 29, 2019 at 5:14 PM Stefan Mavrodiev <[email protected]> wrote: > > A64-OLinuXino-eMMC uses 1.8V for eMMC supply. This is done via a triple > jumper, which sets VCC-PL to either 1.8V or 3.3V. This setting is different > for boards with and without eMMC. > > This is not a big issue for DDR52 mode, however the eMMC will not work in > HS200/HS400, since these modes explicitly requires 1.8V. > > Signed-off-by: Stefan Mavrodiev <[email protected]> > --- > arch/arm64/boot/dts/allwinner/sun50i-a64-olinuxino-emmc.dts | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-olinuxino-emmc.dts > b/arch/arm64/boot/dts/allwinner/sun50i-a64-olinuxino-emmc.dts > index 96ab0227e82d..7d135decbd53 100644 > --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-olinuxino-emmc.dts > +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-olinuxino-emmc.dts > @@ -14,8 +14,8 @@ > &mmc2 { > pinctrl-names = "default"; > pinctrl-0 = <&mmc2_pins>; > - vmmc-supply = <®_dcdc1>; > - vqmmc-supply = <®_dcdc1>; > + vmmc-supply = <®_eldo1>;
If I'm reading the schematics correctly, VCC on the eMMC is from 3.3V. This corresponds to the vmmc-supply property. So you shouldn't change it. > + vqmmc-supply = <®_eldo1>; vqmmc-supply is from the VCC-PC rail, which is the one you say is triple- jumpered. So this change makes sense. 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/CAGb2v64oCx90LQScKTiHVyHLd6c7Rgs_g5L79Yr1J8kgS8-Kyg%40mail.gmail.com.
