[PATCH v2 10/10] ARM: dts: imx50-kobo-aura: Add Netronix embedded controller

Jonathan Neuschäfer
2020-09-05T14:49:42Z

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>
---

v2:
- Fix pwm-cells property (should be 2, not 1)
---
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/imx50-kobo-aura.dts
index a0eaf869b9135..003a7d894902c 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 +136,34 @@ &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>;
+ interrupt-controller;
+ #interrupt-cells = <1>;
+
+ ec_pwm: pwm {
+ compatible = "netronix,ntxec-pwm";
+ #pwm-cells = <2>;
+ };
+
+ rtc {
+ compatible = "netronix,ntxec-rtc";
+ };
+ };
};

&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