From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= <j.neuschaefer@gmx.net>
Subject: [RFC PATCH 10/10] ARM: dts: imx50-kobo-aura: Add Netronix embedded controller
Date: Sun, 21 Jun 2020 00:42:21 +0200
Message-ID: <20200620224222.1312520-9-j.neuschaefer@gmx.net>
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Cc: Lee Jones <lee.jones@linaro.org>, Rob Herring <robh+dt@kernel.org>, =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= <j.neuschaefer@gmx.net>, Thierry Reding <thierry.reding@gmail.com>, =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>, Alessandro Zummo <a.zummo@towertech.it>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix Kernel Team <kernel@pengutronix.de>, Fabio Estevam <festevam@gmail.com>, NXP Linux Team <linux-imx@nxp.com>, Sam Ravnborg <sam@ravnborg.org>, Linus Walleij <linus.walleij@linaro.org>, Heiko Stuebner <heiko.stuebner@theobroma-systems.com>, Stephan Gerhold <stephan@gerhold.net>, Lubomir Rintel <lkundrak@v3.sk>, Mark Brown <broonie@kernel.>

Enable the Netronix EC on the Kobo Aura ebook reader.

Several features are still missing:
 - Frontlight/backlight. The vendor kernel drives the frontlight LED
   using the PWM output of the EC and an additional boost pin that
   increases the brightness.
 - Battery monitoring
 - Interrupts for RTC alarm and low-battery events

Signed-off-by: Jonathan Neusch=C3=A4fer <j.neuschaefer@gmx.net>
=2D--
 arch/arm/boot/dts/imx50-kobo-aura.dts | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx50-kobo-aura.dts b/arch/arm/boot/dts/imx=
50-kobo-aura.dts
index a0eaf869b9135..003a7d894902c 100644
=2D-- a/arch/arm/boot/dts/imx50-kobo-aura.dts
+++ b/arch/arm/boot/dts/imx50-kobo-aura.dts
@@ -6,6 +6,7 @@
 /dts-v1/;
 #include "imx50.dtsi"
 #include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/irq.h>

 / {
 	model =3D "Kobo Aura (N514)";
@@ -135,10 +136,34 @@ &i2c3 {
 	pinctrl-0 =3D <&pinctrl_i2c3>;
 	status =3D "okay";

-	/* TODO: embedded controller at 0x43 */
+	embedded-controller@43 {
+		pinctrl-names =3D "default";
+		pinctrl-0 =3D <&pinctrl_ec>;
+		compatible =3D "netronix,ntxec";
+		reg =3D <0x43>;
+		system-power-controller;
+		interrupts-extended =3D <&gpio4 11 IRQ_TYPE_EDGE_FALLING>;
+		interrupt-controller;
+		#interrupt-cells =3D <1>;
+
+		ec_pwm: pwm {
+			compatible =3D "netronix,ntxec-pwm";
+			#pwm-cells =3D <2>;
+		};
+
+		rtc {
+			compatible =3D "netronix,ntxec-rtc";
+		};
+	};
 };

 &iomuxc {
+	pinctrl_ec: ec {
+		fsl,pins =3D <
+			MX50_PAD_CSPI_SS0__GPIO4_11		0x0	/* INT */
+		>;
+	};
+
 	pinctrl_gpiokeys: gpiokeys {
 		fsl,pins =3D <
 			MX50_PAD_CSPI_MISO__GPIO4_10		0x0
=2D-
2.27.0