linux-kernel - [PATCH 1/4] arm64: dts: meson: bananapi-m5: switch VDDIO_C pin to OPEN

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230127100236.3385154-2-christianshewitt@gmail.com>
Date:   Fri, 27 Jan 2023 10:02:33 +0000
From:   Christian Hewitt <christianshewitt@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Christian Hewitt <christianshewitt@...il.com>
Subject: [PATCH 1/4] arm64: dts: meson: bananapi-m5: switch VDDIO_C pin to OPEN_DRAIN

For proper warm (re)boot from SD card the BPI-M5 board requires TFLASH_VDD_EN
and VDDIO_C pins to be switched to high impedance mode. This can be achieved
using OPEN_DRAIN instead of ACTIVE_HIGH to leave the GPIO pins in input mode
and retain high state (pin has the pull-up).

This change is inspired by meson-sm1-odroid.dtsi where OPEN_DRAIN has been
used to resolve similar problems with the Odroid C4 board (TF_IO in the C4
dts is the equivalent regulator).

Fixes 976e920183e4 ("arm64: dts: meson-sm1: add Banana PI BPI-M5 board dts")
Suggested-by: Neil Armstrong <neil.armstrong@...aro.org>
Signed-off-by: Christian Hewitt <christianshewitt@...il.com>
---
 arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts b/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts
index 028220ed45ad..3c1267a7ffef 100644
--- a/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts
@@ -123,7 +123,7 @@ vddio_c: regulator-vddio_c {
 		regulator-min-microvolt = <1800000>;
 		regulator-max-microvolt = <3300000>;
 
-		enable-gpio = <&gpio_ao GPIOE_2 GPIO_ACTIVE_HIGH>;
+		enable-gpio = <&gpio_ao GPIOE_2 GPIO_OPEN_DRAIN>;
 		enable-active-high;
 		regulator-always-on;
 
-- 
2.34.1