Commit d2db0d78 authored Jun 02, 2025 by Frank Li Committed by Greg Kroah-Hartman Jun 29, 2025

dt-bindings: serial: 8250: allow clock 'uartclk' and 'reg' for nxp,lpc1850-uart



Allow clock 'uartclk' and 'reg' for nxp,lpc1850-uart to align existed
driver and dts. It is really old platform. Keep the same restriction for
others.

Allow dmas and dma-names property, which allow maxItems 4 because very old
platform (arch/arm/boot/dts/nxp/lpc/lpc18xx.dtsi) use duplicate "tx", "rx",
"tx", "rx" as dma-names.

Fix below CHECK_DTB warnings:
  arch/arm/boot/dts/nxp/lpc/lpc4337-ciaa.dtb: serial@40081000 (nxp,lpc1850-uart): clock-names: ['uartclk', 'reg'] is too long

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Acked-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://lore.kernel.org/r/20250602142745.942568-1-Frank.Li@nxp.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 6241b495

Documentation/devicetree/bindings/serial/8250.yaml

+37 −4

Original line number	Diff line number	Diff line
		@@ -49,6 +49,24 @@ allOf:
		- required: [ clock-frequency ]
		- required: [ clocks ]

		- if:
		properties:
		compatible:
		contains:
		const: nxp,lpc1850-uart
		then:
		properties:
		clock-names:
		items:
		- const: uartclk
		- const: reg
		else:
		properties:
		clock-names:
		items:
		- const: core
		- const: bus

		properties:
		compatible:
		oneOf:
		@@ -142,9 +160,22 @@ properties:

		clock-names:
		minItems: 1
		items:
		maxItems: 2
		oneOf:
		- items:
		- const: core
		- const: bus
		- items:
		- const: uartclk
		- const: reg

		dmas:
		minItems: 1
		maxItems: 4

		dma-names:
		minItems: 1
		maxItems: 4

		resets:
		maxItems: 1
		@@ -237,7 +268,9 @@ if:
		properties:
		compatible:
		contains:
		const: spacemit,k1-uart
		enum:
		- spacemit,k1-uart
		- nxp,lpc1850-uart
		then:
		required: [clock-names]
		properties: