| Message ID | 1437461725-12364-1-git-send-email-s.hauer@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/arch/arm64/boot/dts/mediatek/mt8173-evb.dts b/arch/arm64/boot/dts/mediatek/mt8173-evb.dts index 459ce6d..1c9dd84 100644 --- a/arch/arm64/boot/dts/mediatek/mt8173-evb.dts +++ b/arch/arm64/boot/dts/mediatek/mt8173-evb.dts @@ -317,6 +317,8 @@ cap-mmc-highspeed; vmmc-supply = <&mt6397_vemc_3v3_reg>; non-removable; + /* Only MT8173 E1 needs USB power domain enabled for MMC */ + power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>; }; &mmc1 { @@ -331,6 +333,8 @@ cd-gpios = <&pio 132 0>; vmmc-supply = <&mt6397_vmch_reg>; vqmmc-supply = <&mt6397_vmc_reg>; + /* Only MT8173 E1 needs USB power domain enabled for MMC */ + power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>; }; &pio {
The MT8173 E1 chip has a silicon bug which breaks MMC when the USB power domain is disabled. The E1 chip is only found on the MT8173-evb board and this board only has the E1 chip, so we can implement this as a board specific workaround. This patch adds the MMC ports to the USB power domain to enable the domain whenever MMC is active. Since people tend to copy-paste add a comment so hopefully people will drop this line for other boards. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> --- This fixes MMC support in conjunction with the SCPSYS power domain driver currently sitting in Matthias' tree, so this is best fitted in Matthias' v4.2-next/arm64 branch arch/arm64/boot/dts/mediatek/mt8173-evb.dts | 4 ++++ 1 file changed, 4 insertions(+)