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Subject[PATCH V8 1/4] dt-bindings: watchdog: add i.MX system controller watchdog
Add i.MX system controller watchdog binding doc.

Signed-off-by: Anson Huang <>
New patch, as watchdog node is moved out of SCU, so we need to add binding doc for it.
.../devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
create mode 100644 Documentation/devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt

diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt b/Documentation/devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt
new file mode 100644
index 0000000..e461c85
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt
@@ -0,0 +1,20 @@
+* Freescale i.MX System Controller Watchdog
+i.MX system controller watchdog is for i.MX SoCs with system controller inside,
+the watchdog is managed by system controller, users can ONLY communicate with
+system controller from secure mode for watchdog operations, so Linux i.MX system
+controller watchdog driver will call ARM SMC API and trap into ARM-Trusted-Firmware
+for watchdog operations, ARM-Trusted-Firmware is running at secure EL3 mode and
+it will request system controller to execute the watchdog operation passed from
+Linux kernel.
+Required properties:
+- compatible: Should be :
+ "fsl,imx8qxp-sc-wdt"
+ followed by "fsl,imx-sc-wdt";
+watchdog {
+ compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt";
 \ /
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