On 11/29/19 11:26 AM, Chen-Yu Tsai wrote:
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.
My bad. Don't know how I've missed that.
Stefan
+ 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
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