From: Christian Hewitt <christianshewitt@gmail.com>
To: Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: Christian Hewitt <christianshewitt@gmail.com>
Subject: [PATCH 1/4] arm64: dts: meson: bananapi-m5: switch VDDIO_C pin to OPEN_DRAIN
Date: Fri, 27 Jan 2023 10:02:33 +0000 [thread overview]
Message-ID: <20230127100236.3385154-2-christianshewitt@gmail.com> (raw)
In-Reply-To: <20230127100236.3385154-1-christianshewitt@gmail.com>
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@linaro.org>
Signed-off-by: Christian Hewitt <christianshewitt@gmail.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
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next prev parent reply other threads:[~2023-01-27 10:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-27 10:02 [PATCH 0/4] arm64: dts: meson: fix BPI-M5 and add BPI-M2-PRO Christian Hewitt
2023-01-27 10:02 ` Christian Hewitt [this message]
2023-01-27 10:02 ` [PATCH 2/4] arm64: dts: meson: meson-sm1-bananapi-m5: convert to dtsi Christian Hewitt
2023-01-27 10:02 ` [PATCH 3/4] dt-bindings: arm: amlogic: add support for BananaPi M2-Pro Christian Hewitt
2023-01-27 10:06 ` Krzysztof Kozlowski
2023-01-27 10:02 ` [PATCH 4/4] arm64: dts: meson: " Christian Hewitt
2023-01-27 10:06 ` Krzysztof Kozlowski
2023-01-27 10:08 ` Neil Armstrong
2023-01-27 10:19 ` Christian Hewitt
2023-01-27 13:01 ` Krzysztof Kozlowski
2023-01-27 14:26 ` Christian Hewitt
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