[PATCH 3/3] arm64: dts: rockchip: remove always-on and boot-on from vcc_sd

Shawn Lin shawn.lin at rock-chips.com
Wed Sep 21 21:02:19 PDT 2016


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 at rock-chips.com>
---

 arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts        | 2 --
 arch/arm64/boot/dts/rockchip/rk3368-orion-r68-meta.dts | 2 --
 arch/arm64/boot/dts/rockchip/rk3368-px5-evb.dts        | 2 --
 3 files changed, 6 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts b/arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts
index 46cdddf..353314c 100644
--- a/arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts
@@ -258,8 +258,6 @@
 			};
 
 			vcc_sd: SWITCH_REG1 {
-				regulator-always-on;
-				regulator-boot-on;
 				regulator-name = "vcc_sd";
 			};
 
diff --git a/arch/arm64/boot/dts/rockchip/rk3368-orion-r68-meta.dts b/arch/arm64/boot/dts/rockchip/rk3368-orion-r68-meta.dts
index 5797933..13b7f1ed 100644
--- a/arch/arm64/boot/dts/rockchip/rk3368-orion-r68-meta.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3368-orion-r68-meta.dts
@@ -152,8 +152,6 @@
 		gpio = <&gpio3 11 GPIO_ACTIVE_LOW>;
 		regulator-min-microvolt = <1800000>;
 		regulator-max-microvolt = <3300000>;
-		regulator-always-on;
-		regulator-boot-on;
 		vin-supply = <&vcc_io>;
 	};
 
diff --git a/arch/arm64/boot/dts/rockchip/rk3368-px5-evb.dts b/arch/arm64/boot/dts/rockchip/rk3368-px5-evb.dts
index f59049b..8c47b01 100644
--- a/arch/arm64/boot/dts/rockchip/rk3368-px5-evb.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3368-px5-evb.dts
@@ -236,8 +236,6 @@
 			};
 
 			vcc_sd: SWITCH_REG1 {
-				regulator-always-on;
-				regulator-boot-on;
 				regulator-name = "vcc_sd";
 			};
 
-- 
2.3.7





More information about the Linux-rockchip mailing list