On 2019-10-03 10:50 pm, Soeren Moch wrote:
According to the RockPro64 schematic [1] the rk3399 sdmmc controller is connected to a microSD (TF card) slot, which cannot be switched to 1.8V.
Really? AFAICS the SDMMC0 wiring looks pretty much identical to the NanoPC-T4 schematic (it's the same reference design, after all), and I know that board can happily drive a UHS-I microSD card with 1.8v I/Os, because mine's doing so right now.
Robin.
So also configure the vcc_sdio regulator, which drives the i/o voltage of the sdmmc controller, accordingly. While at it, also remove the cap-mmc-highspeed property of the sdmmc controller, since no mmc card can be connected here. [1] http://files.pine64.org/doc/rockpro64/rockpro64_v21-SCH.pdf Fixes: e4f3fb490967 ("arm64: dts: rockchip: add initial dts support for Rockpro64") Signed-off-by: Soeren Moch <smoch@xxxxxx> --- Cc: Heiko Stuebner <heiko@xxxxxxxxx> Cc: linux-rockchip@xxxxxxxxxxxxxxxxxxx Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx --- arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts index 2e44dae4865a..084f1d994a50 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts +++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts @@ -353,7 +353,7 @@ regulator-name = "vcc_sdio"; regulator-always-on; regulator-boot-on; - regulator-min-microvolt = <1800000>; + regulator-min-microvolt = <3000000>; regulator-max-microvolt = <3000000>; regulator-state-mem { regulator-on-in-suspend; @@ -624,7 +624,6 @@ &sdmmc { bus-width = <4>; - cap-mmc-highspeed; cap-sd-highspeed; cd-gpios = <&gpio0 7 GPIO_ACTIVE_LOW>; disable-wp; -- 2.17.1 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-rockchip
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