[PATCH v3 7/7] ARM: dts: imx50-kobo-aura: Add Netronix embedded controller

From: "Jonathan Neuschäfer" <j.neuschaefer@gmx.net>
To: linux-kernel@vger.kernel.org
Cc: "Alexandre Belloni" <alexandre.belloni@bootlin.com>,
	"Heiko Stuebner" <heiko@sntech.de>,
	linux-pwm@vger.kernel.org,
	"Linus Walleij" <linus.walleij@linaro.org>,
	"Thierry Reding" <thierry.reding@gmail.com>,
	"Fabio Estevam" <festevam@gmail.com>,
	linux-rtc@vger.kernel.org, "Arnd Bergmann" <arnd@arndb.de>,
	"Mauro Carvalho Chehab" <mchehab+huawei@kernel.org>,
	"Sam Ravnborg" <sam@ravnborg.org>,
	"Daniel Palmer" <daniel@0x0f.com>,
	"Andy Shevchenko" <andy.shevchenko@gmail.com>,
	"Andreas Kemnade" <andreas@kemnade.info>,
	"NXP Linux Team" <linux-imx@nxp.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	devicetree@vger.kernel.org,
	"Stephan Gerhold" <stephan@gerhold.net>,
	allen <allen.chen@ite.com.tw>,
	"Sascha Hauer" <s.hauer@pengutronix.de>,
	"Jonathan Neuschäfer" <j.neuschaefer@gmx.net>,
	"Lubomir Rintel" <lkundrak@v3.sk>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Lee Jones" <lee.jones@linaro.org>,
	linux-arm-kernel@lists.infradead.org,
	"Alessandro Zummo" <a.zummo@towertech.it>,
	"Mark Brown" <broonie@kernel.org>,
	"Pengutronix Kernel Team" <kernel@pengutronix.de>,
	"Heiko Stuebner" <heiko.stuebner@theobroma-systems.com>,
	"Josua Mayer" <josua.mayer@jm0.eu>,
	"Shawn Guo" <shawnguo@kernel.org>,
	"David S. Miller" <davem@davemloft.net>
Subject: [PATCH v3 7/7] ARM: dts: imx50-kobo-aura: Add Netronix embedded controller
Date: Fri, 25 Sep 2020 07:08:18 +0200	[thread overview]
Message-ID: <20200925050818.2512375-1-j.neuschaefer@gmx.net> (raw)
In-Reply-To: <20200924192455.2484005-1-j.neuschaefer@gmx.net>

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 Neuschäfer <j.neuschaefer@gmx.net>
---

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)
---
 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/imx50-kobo-aura.dts
index a0eaf869b9135..2d1a59091a37c 100644
--- 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 = "Kobo Aura (N514)";
@@ -135,10 +136,24 @@ &i2c3 {
 	pinctrl-0 = <&pinctrl_i2c3>;
 	status = "okay";

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

 &iomuxc {
+	pinctrl_ec: ec {
+		fsl,pins = <
+			MX50_PAD_CSPI_SS0__GPIO4_11		0x0	/* INT */
+		>;
+	};
+
 	pinctrl_gpiokeys: gpiokeys {
 		fsl,pins = <
 			MX50_PAD_CSPI_MISO__GPIO4_10		0x0
--
2.28.0


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