From: Marek Vasut <marek.vasut+renesas@gmail.com>
Date: Mon, 18 Mar 2019 02:20:31 +0000 (+0100)
Subject: ARM: dts: rmobile: Increase off-on delay on the SD Vcc regulator
X-Git-Tag: v2019.04~19^2~5
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=c49d0ac38a76;p=oweals%2Fu-boot.git

ARM: dts: rmobile: Increase off-on delay on the SD Vcc regulator

An ADATA 16GB Industrial MLC card has so much capacitance on the Vcc
pin that the usual toggling of regulator to power the card off and on
is insufficient. When the card is calibrated into UHS SDR104 mode, it
will remain in that mode across the power cycle and subsequent attempt
to communicate with the card will fail.

The test with this card is to insert it into an SDHI slot and perform
"mmc dev 0 ; mmc dev 0", where the second "mmc dev 0" will fail.

Fix this problem by increasing the off-on delay from 0 to 20 mS.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
---

diff --git a/arch/arm/dts/r8a7795-h3ulcb-u-boot.dts b/arch/arm/dts/r8a7795-h3ulcb-u-boot.dts
index ebbd234d78..3de640724d 100644
--- a/arch/arm/dts/r8a7795-h3ulcb-u-boot.dts
+++ b/arch/arm/dts/r8a7795-h3ulcb-u-boot.dts
@@ -19,6 +19,10 @@
 	};
 };
 
+&vcc_sdhi0 {
+	u-boot,off-on-delay-us = <20000>;
+};
+
 &sdhi2_pins {
 	groups = "sdhi2_data8", "sdhi2_ctrl", "sdhi2_ds";
 	power-source = <1800>;
diff --git a/arch/arm/dts/r8a7795-salvator-x-u-boot.dts b/arch/arm/dts/r8a7795-salvator-x-u-boot.dts
index 8be5e41a51..a22028bb31 100644
--- a/arch/arm/dts/r8a7795-salvator-x-u-boot.dts
+++ b/arch/arm/dts/r8a7795-salvator-x-u-boot.dts
@@ -8,6 +8,14 @@
 #include "r8a7795-salvator-x.dts"
 #include "r8a7795-u-boot.dtsi"
 
+&vcc_sdhi0 {
+	u-boot,off-on-delay-us = <20000>;
+};
+
+&vcc_sdhi3 {
+	u-boot,off-on-delay-us = <20000>;
+};
+
 &sdhi2_pins {
 	groups = "sdhi2_data8", "sdhi2_ctrl", "sdhi2_ds";
 	power-source = <1800>;
diff --git a/arch/arm/dts/r8a7796-m3ulcb-u-boot.dts b/arch/arm/dts/r8a7796-m3ulcb-u-boot.dts
index 4e960081f9..612cc87c71 100644
--- a/arch/arm/dts/r8a7796-m3ulcb-u-boot.dts
+++ b/arch/arm/dts/r8a7796-m3ulcb-u-boot.dts
@@ -19,6 +19,10 @@
 	};
 };
 
+&vcc_sdhi0 {
+	u-boot,off-on-delay-us = <20000>;
+};
+
 &sdhi2_pins {
 	groups = "sdhi2_data8", "sdhi2_ctrl", "sdhi2_ds";
 	power-source = <1800>;
diff --git a/arch/arm/dts/r8a7796-salvator-x-u-boot.dts b/arch/arm/dts/r8a7796-salvator-x-u-boot.dts
index 44b2f9fb37..c730b90a42 100644
--- a/arch/arm/dts/r8a7796-salvator-x-u-boot.dts
+++ b/arch/arm/dts/r8a7796-salvator-x-u-boot.dts
@@ -8,6 +8,14 @@
 #include "r8a7796-salvator-x.dts"
 #include "r8a7796-u-boot.dtsi"
 
+&vcc_sdhi0 {
+	u-boot,off-on-delay-us = <20000>;
+};
+
+&vcc_sdhi3 {
+	u-boot,off-on-delay-us = <20000>;
+};
+
 &sdhi2_pins {
 	groups = "sdhi2_data8", "sdhi2_ctrl", "sdhi2_ds";
 	power-source = <1800>;
diff --git a/arch/arm/dts/r8a77965-salvator-x-u-boot.dts b/arch/arm/dts/r8a77965-salvator-x-u-boot.dts
index 9e0cd26f40..cfc0f74081 100644
--- a/arch/arm/dts/r8a77965-salvator-x-u-boot.dts
+++ b/arch/arm/dts/r8a77965-salvator-x-u-boot.dts
@@ -8,6 +8,14 @@
 #include "r8a77965-salvator-x.dts"
 #include "r8a77965-u-boot.dtsi"
 
+&vcc_sdhi0 {
+	u-boot,off-on-delay-us = <20000>;
+};
+
+&vcc_sdhi3 {
+	u-boot,off-on-delay-us = <20000>;
+};
+
 &sdhi2_pins {
 	groups = "sdhi2_data8", "sdhi2_ctrl", "sdhi2_ds";
 	power-source = <1800>;
diff --git a/arch/arm/dts/r8a77990-ebisu-u-boot.dts b/arch/arm/dts/r8a77990-ebisu-u-boot.dts
index b030d5c649..4c1669e022 100644
--- a/arch/arm/dts/r8a77990-ebisu-u-boot.dts
+++ b/arch/arm/dts/r8a77990-ebisu-u-boot.dts
@@ -36,6 +36,7 @@
 
 		gpio = <&gpio5 17 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
+		u-boot,off-on-delay-us = <20000>;
 	};
 
 	vccq_sdhi0: regulator-vccq-sdhi0 {
@@ -60,6 +61,7 @@
 
 		gpio = <&gpio0 4 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
+		u-boot,off-on-delay-us = <20000>;
 	};
 
 	vccq_sdhi1: regulator-vccq-sdhi1 {