linux-kernel - [PATCH v4 4/8] arm64: dts: librem5-devkit: allow modem to wake the system from suspend

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Date:   Thu, 27 Feb 2020 14:17:29 +0100
From:   Martin Kepplinger <martin.kepplinger@...i.sm>
To:     robh@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com
Cc:     linux-imx@....com, Anson.Huang@....com, devicetree@...r.kernel.org,
        kernel@...i.sm, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        "Angus Ainslie (Purism)" <angus@...ea.ca>,
        Martin Kepplinger <martin.kepplinger@...i.sm>
Subject: [PATCH v4 4/8] arm64: dts: librem5-devkit: allow modem to wake the system from suspend

From: "Angus Ainslie (Purism)" <angus@...ea.ca>

Connect the WoWWAN signal to a gpio key to wake up the system from suspend.

Signed-off-by: Angus Ainslie (Purism) <angus@...ea.ca>
Signed-off-by: Martin Kepplinger <martin.kepplinger@...i.sm>
---
 .../arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
index 84443e4857d5..823d5c60a8fa 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
@@ -55,6 +55,15 @@
 			wakeup-source;
 			linux,code = <KEY_HP>;
 		};
+
+		wwan-wake {
+			label = "WWAN_WAKE";
+			gpios = <&gpio3 8 GPIO_ACTIVE_LOW>;
+			interrupt-parent = <&gpio3>;
+			interrupts = <8 GPIO_ACTIVE_LOW>;
+			wakeup-source;
+			linux,code = <KEY_PHONE>;
+		};
 	};
 
 	leds {
@@ -576,6 +585,7 @@
 			MX8MQ_IOMUXC_SAI2_RXFS_GPIO4_IO21	0x16
 			MX8MQ_IOMUXC_SAI2_RXC_GPIO4_IO22	0x16
 			MX8MQ_IOMUXC_SAI5_RXC_GPIO3_IO20	0x180  /* HP_DET */
+			MX8MQ_IOMUXC_NAND_DATA02_GPIO3_IO8	0x80   /* nWoWWAN */
 		>;
 	};
 
-- 
2.20.1