[PATCH v9 7/7] ARM: dts: imx50-kobo-aura: Add Netronix embedded controller

Jonathan Neuschäfer
2021-01-24T22:46:02Z

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>
---
v5-v9:
- no changes

v4:
- https://lore.kernel.org/lkml/20201123000913.1506944-1-j.neuschaefer@gmx.net/
- Add 'grp' suffix to pinctrl node

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

v2:
- Fix pwm-cells property (should be 2, not 1)
---
arch/arm/boot/dts/imx50-kobo-aura.dts | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx50-kobo-aura.dts b/arch/arm/boot/dts/imx50-kobo-aura.dts
index 97cfd970fe742..82ce8c43be867 100644
--- a/arch/arm/boot/dts/imx50-kobo-aura.dts
+++ b/arch/arm/boot/dts/imx50-kobo-aura.dts
@@ -143,10 +143,24 @@ &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: ecgrp {
+ fsl,pins = <
+ MX50_PAD_CSPI_SS0__GPIO4_11 0x0 /* INT */
+ >;
+ };
+
pinctrl_gpiokeys: gpiokeysgrp {
fsl,pins = <
MX50_PAD_CSPI_MISO__GPIO4_10 0x0
--
2.29.2