From bb83520d269536f5d48b609a23ec0a1fdabbe503 Mon Sep 17 00:00:00 2001 From: Anson Huang Date: Thu, 21 Mar 2019 02:26:38 +0000 Subject: dt-bindings: watchdog: add i.MX system controller watchdog Add i.MX system controller watchdog binding doc. Signed-off-by: Anson Huang Acked-by: Rob Herring Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- .../bindings/watchdog/fsl-imx-sc-wdt.txt | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt (limited to '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 000000000000..02b87e92ae68 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/fsl-imx-sc-wdt.txt @@ -0,0 +1,24 @@ +* 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"; + +Optional properties: +- timeout-sec : Contains the watchdog timeout in seconds. + +Examples: + +watchdog { + compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt"; + timeout-sec = <60>; +}; -- cgit v1.2.3-55-g7522