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Subject: [PATCH v3 7/7] ARM: dts: imx50-kobo-aura: Add Netronix embedded controller
Date:   Fri, 25 Sep 2020 07:08:18 +0200
Message-Id: <20200925050818.2512375-1-j.neuschaefer@gmx.net>
In-Reply-To: <20200924192455.2484005-1-j.neuschaefer@gmx.net>
References: <20200924192455.2484005-1-j.neuschaefer@gmx.net>
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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--

v3:
- Remove interrupt-controller property from embedded-controller node
- subnodes of embedded-controller node in to the main node

v2:
- https://lore.kernel.org/lkml/20200905144503.1067124-3-j.neuschaefer@gmx.=
net/
- Fix pwm-cells property (should be 2, not 1)
=2D--
 arch/arm/boot/dts/imx50-kobo-aura.dts | 17 ++++++++++++++++-
 1 file changed, 16 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..2d1a59091a37c 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 +136,24 @@ &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>;
+		#pwm-cells =3D <2>;
+	};
 };

 &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-
2.28.0