On 03.09.19 16:03, Anson Huang wrote:
NXP i.MX8QXP is an ARMv8 SoC with a Cortex-M4 core inside as
system controller, the system controller is in charge of system
power, clock and power key event etc. management, Linux kernel
has to communicate with system controller via MU (message unit)
IPC to get power key event, add binding doc for i.MX system
controller power key driver.
Signed-off-by: Anson Huang <Anson.Huang@xxxxxxx>
---
Changes since V1:
- remove "wakeup-source" property, as it is NOT needed for SCU interrupt;
- remove "status" in example.
---
.../devicetree/bindings/arm/freescale/fsl,scu.txt | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
index c149fad..f93e2e4 100644
--- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
+++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
@@ -157,6 +157,15 @@ Required properties:
Optional properties:
- timeout-sec: contains the watchdog timeout in seconds.
+Power key bindings based on SCU Message Protocol
+------------------------------------------------------------
+
+Required properties:
+- compatible: should be:
+ "fsl,imx8qxp-sc-pwrkey"
+ followed by "fsl,imx-sc-pwrkey";
+- linux,keycodes: See Documentation/devicetree/bindings/input/keys.txt
linux,keycodes is required parameter. So, this kay cab be anything. Why the compatible is
called pwrkey? Probably it is better to call it "*-sc-key"
+
Example (imx8qxp):
-------------
aliases {
@@ -220,6 +229,11 @@ firmware {
compatible = "fsl,imx8qxp-sc-rtc";
};
+ scu_pwrkey: scu-pwrkey {
+ compatible = "fsl,imx8qxp-sc-pwrkey", "fsl,imx-sc-pwrkey";
+ linux,keycode = <KEY_POWER>;
+ };
+
watchdog {
compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt";
timeout-sec = <60>;
Kind regards,
Oleksij Rempel
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
