linux-kernel - [PATCH v2 06/24] ARM: dts: imx7-colibri: improve wake-up with gpio key

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Date:   Mon, 16 May 2022 15:47:16 +0200
From:   Marcel Ziswiler <marcel@...wiler.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Oleksandr Suvorov <oleksandr.suvorov@...adex.com>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Fabio Estevam <festevam@...il.com>,
        Frank Rowand <frowand.list@...il.com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 06/24] ARM: dts: imx7-colibri: improve wake-up with gpio key

From: Oleksandr Suvorov <oleksandr.suvorov@...adex.com>

The pin GPIO1_IO01 externally pulls down, it is required to sequentially
connect this pin (signal WAKE_MICO#) to +3v3 and then disconnect it to
trigger a wakeup interrupt.
Adding the flag GPIO_PULL_DOWN allows the system to be woken up just
connecting the pin GPIO1_IO01 to +3v3.

Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@...adex.com>
---

(no changes since v1)

 arch/arm/boot/dts/imx7-colibri-aster.dtsi   | 2 +-
 arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/imx7-colibri-aster.dtsi b/arch/arm/boot/dts/imx7-colibri-aster.dtsi
index bfadb3a3124a..9148c54403f3 100644
--- a/arch/arm/boot/dts/imx7-colibri-aster.dtsi
+++ b/arch/arm/boot/dts/imx7-colibri-aster.dtsi
@@ -15,7 +15,7 @@ gpio-keys {
 
 		power {
 			label = "Wake-Up";
-			gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
+			gpios = <&gpio1 1 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;
 			linux,code = <KEY_WAKEUP>;
 			debounce-interval = <10>;
 			wakeup-source;
diff --git a/arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi b/arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi
index 074c96f09191..4a7e593e9ac6 100644
--- a/arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi
+++ b/arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi
@@ -34,7 +34,7 @@ gpio-keys {
 
 		power {
 			label = "Wake-Up";
-			gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
+			gpios = <&gpio1 1 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;
 			linux,code = <KEY_WAKEUP>;
 			debounce-interval = <10>;
 			wakeup-source;
-- 
2.35.1