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From:   Marcel Ziswiler <marcel@ziswiler.com>
To:     devicetree@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-imx@nxp.com, Marcel Ziswiler <marcel.ziswiler@toradex.com>,
        Fabio Estevam <festevam@gmail.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Rob Herring <robh+dt@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Shawn Guo <shawnguo@kernel.org>
Subject: [PATCH v1 1/4] ARM: dts: colibri-imx6: improve wake-up with gpio key
Date:   Mon,  9 Jan 2023 14:19:58 +0100
Message-Id: <20230109132001.43489-2-marcel@ziswiler.com>
In-Reply-To: <20230109132001.43489-1-marcel@ziswiler.com>
References: <20230109132001.43489-1-marcel@ziswiler.com>
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From: Marcel Ziswiler <marcel.ziswiler@toradex.com>

The pin GPIO2_IO22 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 GPIO2_IO22 to +3v3.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
---

 arch/arm/boot/dts/imx6qdl-colibri.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6qdl-colibri.dtsi b/arch/arm/boot/dts/imx6qdl-colibri.dtsi
index d8f985f297e4..9abce6bc6dd4 100644
--- a/arch/arm/boot/dts/imx6qdl-colibri.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-colibri.dtsi
@@ -38,7 +38,7 @@ gpio-keys {
 
 		wakeup {
 			debounce-interval = <10>;
-			gpios = <&gpio2 22 GPIO_ACTIVE_HIGH>; /* SODIMM 45 */
+			gpios = <&gpio2 22 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* SODIMM 45 */
 			label = "Wake-Up";
 			linux,code = <KEY_WAKEUP>;
 			wakeup-source;
-- 
2.35.1