MicroSD card slot in the Pinebook Pro is located on a separate
daughterboard that's connected to the mainboard using a rather
long flat cable. The resulting signal degradation causes many
perfectly fine microSD cards not to work in the Pinebook Pro,
which is a common source of frustration among the owners.
Changing the mode and lowering the speed reportedly fixes this
issue and makes many microSD cards work as expected.
Co-developed-by: Dragan Simic <dragan.simic@xxxxxxxxx>
Signed-off-by: Dragan Simic <dragan.simic@xxxxxxxxx>
Tested-by: JR Gonzalez <jrg@xxxxxxxxxxxxx>
Signed-off-by: Dan Johansen <strit@xxxxxxxxxxx>
---
Changes since v1:
Use correct Co-developed-by and add missing Signed-off-by.
arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
index 194e48c755f6..54bb0398128f 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
@@ -943,7 +943,7 @@ &sdmmc {
disable-wp;
pinctrl-names = "default";
pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_bus4>;
- sd-uhs-sdr104;
+ sd-uhs-sdr50;
vmmc-supply = <&vcc3v0_sd>;
vqmmc-supply = <&vcc_sdio>;
status = "okay";
--
2.39.2
