Commit 2c0594f9 authored by Alex Elder's avatar Alex Elder Committed by Greg Kroah-Hartman
Browse files

dt-bindings: serial: 8250: support an optional second clock 



The SpacemiT UART driver requires a bus clock to be enabled in addition
to the primary function clock.  Add the option to specify two clocks
for an 8250-compatible UART, named "core" and "bus".  If both are needed,
require them to be named.

Signed-off-by: default avatarAlex Elder <elder@riscstar.com>
Reviewed-by: default avatarRob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250409192213.1130181-2-elder@riscstar.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0ed22827

Documentation/devicetree/bindings/serial/8250.yaml

+29 −1
Original line number Diff line number Diff line
@@ -135,7 +135,16 @@ properties: 
  clock-frequency: true



  clocks:

    maxItems: 1

    minItems: 1

    items:

      - description: The core function clock

      - description: An optional bus clock



  clock-names:

    minItems: 1

    items:

      - const: core

      - const: bus



  resets:

    maxItems: 1
@@ -224,6 +233,25 @@ required: 
  - reg

  - interrupts



if:

  properties:

    compatible:

      contains:

        const: spacemit,k1-uart

then:

  required: [clock-names]

  properties:

    clocks:

      minItems: 2

    clock-names:

      minItems: 2

else:

  properties:

    clocks:

      maxItems: 1

    clock-names:

      maxItems: 1



unevaluatedProperties: false



examples: