[V2,1/4] dt-bindings: fsl: scu: add watchdog binding

Commit Message

Anson Huang April 28, 2019, 3:27 a.m. UTC

i.MX system controller watchdog has pretimeout function which
depends on i.MX SCU driver, so watchdog DT node needs to be
subnode of SCU, this patch adds i.MX system controller watchdog
binding to SCU binding doc.

Signed-off-by: Anson Huang <[e-mail]>
---
New patch.
---
 .../devicetree/bindings/arm/freescale/fsl,scu.txt         | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

Comments

Rob Herring (Arm) May 1, 2019, 8:10 p.m. UTC | #1

On Sun, Apr 28, 2019 at 03:27:00AM +0000, Anson Huang wrote:
> i.MX system controller watchdog has pretimeout function which
> depends on i.MX SCU driver, so watchdog DT node needs to be
> subnode of SCU, this patch adds i.MX system controller watchdog
> binding to SCU binding doc.
> 
> Signed-off-by: Anson Huang <[e-mail]>
> ---
> New patch.
> ---
>  .../devicetree/bindings/arm/freescale/fsl,scu.txt         | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> index 5d7dbab..1b56557 100644
> --- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> @@ -133,6 +133,16 @@ RTC bindings based on SCU Message Protocol
>  Required properties:
>  - compatible: should be "fsl,imx8qxp-sc-rtc";
>  
> +Watchdog bindings based on SCU Message Protocol
> +------------------------------------------------------------
> +
> +Required properties:
> +- compatible: should be:
> +              "fsl,imx8qxp-sc-wdt"
> +              followed by "fsl,imx-sc-wdt";
> +Optional properties:
> +- timeout-sec: contains the watchdog timeout in seconds.

This should be the time to reset the system, but the subject talks about 
the pre-timeout which I guess is just an interrupt. If it is pre-timeout 
you want add a new property and don't abuse the existing one.

Rob

Patch

diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
index 5d7dbab..1b56557 100644
--- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
+++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
@@ -133,6 +133,16 @@  RTC bindings based on SCU Message Protocol
 Required properties:
 - compatible: should be "fsl,imx8qxp-sc-rtc";
 
+Watchdog bindings based on SCU Message Protocol
+------------------------------------------------------------
+
+Required properties:
+- compatible: should be:
+              "fsl,imx8qxp-sc-wdt"
+              followed by "fsl,imx-sc-wdt";
+Optional properties:
+- timeout-sec: contains the watchdog timeout in seconds.
+
 Example (imx8qxp):
 -------------
 aliases {
@@ -185,6 +195,11 @@  firmware {
 		rtc: rtc {
 			compatible = "fsl,imx8qxp-sc-rtc";
 		};
+
+		watchdog {
+			compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt";
+			timeout-sec = <60>;
+		};
 	};
 };