linux-kernel - [PATCH 5.19 0206/1157] ARM: dts: imx7-colibri: improve wake-up with gpio key

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Date:   Mon, 15 Aug 2022 19:52:42 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Oleksandr Suvorov <oleksandr.suvorov@...adex.com>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 0206/1157] ARM: dts: imx7-colibri: improve wake-up with gpio key

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

[ Upstream commit fd5d2974652c96935d94301af6eaf6b3585ab330 ]

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>
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 950b4e5f6cf4..69ee85084ad4 100644
--- a/arch/arm/boot/dts/imx7-colibri-aster.dtsi
+++ b/arch/arm/boot/dts/imx7-colibri-aster.dtsi
@@ -16,7 +16,7 @@ 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 17ad9065646d..d6775e3c64f1 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