From 3a2766cc68e7caa564e1bd56376d2a13cfa687c4 Mon Sep 17 00:00:00 2001 From: Shawn Lin Date: Fri, 23 Sep 2016 08:09:10 +0800 Subject: [PATCH] ARM: dts: rockchip: remove always-on and boot-on from vcc_sd for px3-evb Please don't add these for vcc_sd, and mmc-core/driver will control it. Otherwise, it will waste energy even without sdmmc in slot. Moreover, it will causes a bug: If we insert/remove sd card, we could see [9.337271] mmc0: new ultra high speed SDR25 SDHC card at address 0007 [9.345144] mmcblk0: mmc0:0007 SD32G 29.3 GiB This is okay for normal sd insert/remove test, but when I debug some issues for sdmmc, I did unbind/bind test. And there is a interesting phenomenon when we bind the driver again: [58.314069] mmc0: new high speed SDHC card at address 0007 [58.320282] mmcblk0: mmc0:0007 SD32G 29.3 GiB So the sd card could just support high speed without power cycle since the vcc_sd is always on, which makes the sd card fail to reinit its internal ocr mask. Signed-off-by: Shawn Lin Signed-off-by: Heiko Stuebner --- arch/arm/boot/dts/rk3188-px3-evb.dts | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm/boot/dts/rk3188-px3-evb.dts b/arch/arm/boot/dts/rk3188-px3-evb.dts index 79a5f17b1694..df727bafd6dc 100644 --- a/arch/arm/boot/dts/rk3188-px3-evb.dts +++ b/arch/arm/boot/dts/rk3188-px3-evb.dts @@ -219,8 +219,6 @@ }; vcc_sd: LDO_REG7 { - regulator-always-on; - regulator-boot-on; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <3300000>; regulator-name = "vcc_sd"; -- 2.20.1