linux-kernel - [PATCH 10/23] arm64: zynqmp: Add linux,code for gpio button

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Message-ID: <4e20661f43b1fb8432fa5fcda5c1cb50d0a27475.1683034376.git.michal.simek@amd.com>
Date:   Tue, 2 May 2023 15:35:38 +0200
From:   Michal Simek <michal.simek@....com>
To:     <linux-kernel@...r.kernel.org>, <monstr@...str.eu>,
        <michal.simek@...inx.com>, <git@...inx.com>
CC:     Srinivas Neeli <srinivas.neeli@...inx.com>,
        Amit Kumar Mahapatra <amit.kumar-mahapatra@...inx.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Parth Gajjar <parth.gajjar@....com>,
        "Rob Herring" <robh+dt@...nel.org>,
        Vishal Sagar <vishal.sagar@....com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH 10/23] arm64: zynqmp: Add linux,code for gpio button

From: Srinivas Neeli <srinivas.neeli@...inx.com>

BTN_MISC looks like the most reasonable option for this button.
Button is used by firmware to indicate (after reset, power up) that user
wants to do firmware upgrade via firmware update utility.
For bootloader or OS is this just user button which is worth to have it
mapped.
Also button can be used as a wakeup source and pressing it for more time
can generate more chars that's why also adding wakeup-source and autorepeat
properties.

Signed-off-by: Srinivas Neeli <srinivas.neeli@...inx.com>
Signed-off-by: Michal Simek <michal.simek@....com>
---

 arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts b/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts
index 3862168fa026..340a5c43a8b6 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts
@@ -55,6 +55,9 @@ gpio-keys {
 		key-fwuen {
 			label = "fwuen";
 			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_MISC>;
+			wakeup-source;
+			autorepeat;
 		};
 	};
 
-- 
2.36.1