linux-kernel - [PATCH v8 10/13] arm64: dts: freescale: sl28: map GPIOs to input events

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Message-Id: <20200813124832.17349-11-michael@walle.cc>
Date:   Thu, 13 Aug 2020 14:48:29 +0200
From:   Michael Walle <michael@...le.cc>
To:     linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org,
        linux-pwm@...r.kernel.org, linux-watchdog@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Lee Jones <lee.jones@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Shawn Guo <shawnguo@...nel.org>, Li Yang <leoyang.li@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>, Mark Brown <broonie@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Pavel Machek <pavel@....cz>,
        Michael Walle <michael@...le.cc>
Subject: [PATCH v8 10/13] arm64: dts: freescale: sl28: map GPIOs to input events

Now that we have support for GPIO lines of the SMARC connector, map the
sleep, power and lid switch signals to the corresponding keys using the
gpio-keys and gpio-keys-polled drivers. The power and sleep signals have
dedicated interrupts, thus we use these ones. The lid switch is just
mapped to a GPIO input and needs polling.

Signed-off-by: Michael Walle <michael@...le.cc>
---
Changes since v7:
 - none

Changes since v6:
 - none

Changes since v5:
 - none

Changes since v4:
 - none

Changes since v3:
 - see cover letter

 .../freescale/fsl-ls1028a-kontron-sl28.dts    | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts
index 9f9834eafe65..17a2f5dacc3f 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts
@@ -9,6 +9,8 @@
 /dts-v1/;
 #include "fsl-ls1028a.dtsi"
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
 
 / {
 	model = "Kontron SMARC-sAL28";
@@ -23,6 +25,36 @@
 		spi1 = &dspi2;
 	};
 
+	buttons0 {
+		compatible = "gpio-keys";
+
+		power-button {
+			interrupts-extended = <&sl28cpld_intc
+					       4 IRQ_TYPE_EDGE_BOTH>;
+			linux,code = <KEY_POWER>;
+			label = "Power";
+		};
+
+		sleep-button {
+			interrupts-extended = <&sl28cpld_intc
+					       5 IRQ_TYPE_EDGE_BOTH>;
+			linux,code = <KEY_SLEEP>;
+			label = "Sleep";
+		};
+	};
+
+	buttons1 {
+		compatible = "gpio-keys-polled";
+		poll-interval = <200>;
+
+		lid-switch {
+			linux,input-type = <EV_SW>;
+			linux,code = <SW_LID>;
+			gpios = <&sl28cpld_gpio3 4 GPIO_ACTIVE_LOW>;
+			label = "Lid";
+		};
+	};
+
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
-- 
2.20.1