[V3,1/5] dt-bindings: fsl: scu: add scu key binding

Commit Message

Anson Huang Sept. 3, 2019, 9:36 p.m. UTC

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 scu key event etc. management, Linux kernel has
to communicate with system controller via MU (message unit) IPC
to get scu key event, add binding doc for i.MX system controller
key driver.

Signed-off-by: Anson Huang <[e-mail]>
---
Changes since V2:
	- use "key" instead of "pwrkey" as the key function can be defined in DT.
---
 .../devicetree/bindings/arm/freescale/fsl,scu.txt          | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Comments

Rob Herring Sept. 3, 2019, 6:01 p.m. UTC | #1

On Tue,  3 Sep 2019 17:36:36 -0400, 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 scu key event etc. management, Linux kernel has
> to communicate with system controller via MU (message unit) IPC
> to get scu key event, add binding doc for i.MX system controller
> key driver.
> 
> Signed-off-by: Anson Huang <[e-mail]>
> ---
> Changes since V2:
> 	- use "key" instead of "pwrkey" as the key function can be defined in DT.
> ---
>  .../devicetree/bindings/arm/freescale/fsl,scu.txt          | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 

Reviewed-by: Rob Herring <[e-mail]>

Patch

diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
index c149fad..5eab7d0 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.
 
+SCU key bindings based on SCU Message Protocol
+------------------------------------------------------------
+
+Required properties:
+- compatible: should be:
+              "fsl,imx8qxp-sc-key"
+              followed by "fsl,imx-sc-key";
+- linux,keycodes: See Documentation/devicetree/bindings/input/keys.txt
+
 Example (imx8qxp):
 -------------
 aliases {
@@ -220,6 +229,11 @@  firmware {
 			compatible = "fsl,imx8qxp-sc-rtc";
 		};
 
+		scu_key: scu-key {
+			compatible = "fsl,imx8qxp-sc-key", "fsl,imx-sc-key";
+			linux,keycode = <KEY_POWER>;
+		};
+
 		watchdog {
 			compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt";
 			timeout-sec = <60>;