On 2021/4/21 4:02, Rob Herring wrote: > On Thu, Apr 15, 2021 at 03:31:05PM +0800, Zhen Lei wrote: >> When there is more than one pl011 serial port present, the label property >> allows a custom name to be used for briefly describe the usage or position >> of each serial port. >> >> Without this "label" property, many dtbs_check warnings similar to the >> following are reported: >> arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dt.yaml: \ >> serial@ffd74000: Additional properties are not allowed ('label' was unexpected) >> From schema: Documentation/devicetree/bindings/serial/pl011.yaml > > I think this should go into serial.yaml instead. Yes,But if I add "label: true" into serial.yaml, it doesn't work. I haven't figured out why. By the way, should "$ref: /schemas/serial.yaml#" be replaced with "$ref: /schemas/serial/serial.yaml#"? > >> >> Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx> >> --- >> Documentation/devicetree/bindings/serial/pl011.yaml | 3 +++ >> 1 file changed, 3 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/serial/pl011.yaml b/Documentation/devicetree/bindings/serial/pl011.yaml >> index 1f8e9f2644b6b80..303c7746423f503 100644 >> --- a/Documentation/devicetree/bindings/serial/pl011.yaml >> +++ b/Documentation/devicetree/bindings/serial/pl011.yaml >> @@ -34,6 +34,9 @@ properties: >> reg: >> maxItems: 1 >> >> + label: >> + maxItems: 1 > > label is always a single string and so 'maxItems' is always 1. Just > need: > > label: true OK > >> + >> interrupts: >> maxItems: 1 >> >> -- >> 2.26.0.106.g9fadedd >> >> > > . >