> From: Guenter Roeck [mailto:groeck7@xxxxxxxxx] On Behalf Of Guenter > Roeck> > On 2/22/19 11:52 AM, Rob Herring wrote: > > On Mon, Feb 18, 2019 at 06:53:48AM +0000, Anson Huang wrote: > >> Add i.MX8QXP system controller watchdog binding. > >> > >> Signed-off-by: Anson Huang <Anson.Huang@xxxxxxx> > >> --- > >> Changes since V1: > >> - update dts node name to "watchdog"; > >> --- > >> Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt | 10 > ++++++++++ > >> 1 file changed, 10 insertions(+) > >> > >> diff --git > >> a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > >> b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > >> index 4b79751..f388ec6 100644 > >> --- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > >> +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > >> @@ -136,6 +136,12 @@ Required properties: > >> resource id for thermal driver to get temperature via > >> SCU IPC. > >> > >> +Watchdog bindings based on SCU Message Protocol > >> +------------------------------------------------------------ > >> + > >> +Required properties: > >> +- compatible: should be "fsl,imx8qxp-sc-wdt"; > >> + > >> Example (imx8qxp): > >> ------------- > >> lsio_mu1: mailbox@5d1c0000 { > >> @@ -188,6 +194,10 @@ firmware { > >> tsens-num = <1>; > >> #thermal-sensor-cells = <1>; > >> }; > >> + > >> + watchdog: watchdog { > >> + compatible = "fsl,imx8qxp-sc-wdt"; > > > > As-is, there's no reason for this to be in DT. The parent node's > > driver can instantiate the wdog. > > > > As the driver is currently written, you are correct, since it doesn't accept > watchdog timeout configuration through devicetree. > > Question is if that is intended. Is it ? > Per my understanding, if the protocol is unlike to change, it can be instantiated by portent node's driver. Hope Rob can help give a more general explanation. Regards Dong Aisheng > Thanks, > Guenter
