[PATCH] ARM: dts: rockchip: remove always-on and boot-on from vcc_sd for px3-evb

Shawn Lin
2016-09-23T00:09:10Z

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 <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
---

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 c1e41b8..62cbdd5 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";
--
2.3.7