linux-kernel - Re: [PATCH v2] dt-bindings: serial: Convert snps,arc-uart to DT schema

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Message-ID: <68eeeb84-5df1-4647-b247-6fdf87658c5a@kernel.org>
Date: Sat, 24 May 2025 19:46:06 -0700
From: Vineet Gupta <vgupta@...nel.org>
To: "Rob Herring (Arm)" <robh@...nel.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Jiri Slaby <jirislaby@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Vineet Gupta <vgupta@...nel.org>
Cc: Thierry Reding <treding@...dia.com>, linux-kernel@...r.kernel.org,
 linux-serial@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2] dt-bindings: serial: Convert snps,arc-uart to DT
 schema

On 5/7/25 08:49, Rob Herring (Arm) wrote:
> Convert the Synopsys ARC UART binding to DT schema. Drop the "aliases"
> portion which is not relevant to this schema.
>
> Reviewed-by: Thierry Reding <treding@...dia.com>
> Signed-off-by: Rob Herring (Arm) <robh@...nel.org>

Acked-by: Vineet Gupta <vgupta@...nel.org>

Thx,
-Vineet

> ---
> v2:
>  - Fix $id path
> ---
>  .../devicetree/bindings/serial/arc-uart.txt   | 25 ---------
>  .../bindings/serial/snps,arc-uart.yaml        | 51 +++++++++++++++++++
>  2 files changed, 51 insertions(+), 25 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/serial/arc-uart.txt
>  create mode 100644 Documentation/devicetree/bindings/serial/snps,arc-uart.yaml
>
> diff --git a/Documentation/devicetree/bindings/serial/arc-uart.txt b/Documentation/devicetree/bindings/serial/arc-uart.txt
> deleted file mode 100644
> index 256cc150ca7e..000000000000
> --- a/Documentation/devicetree/bindings/serial/arc-uart.txt
> +++ /dev/null
> @@ -1,25 +0,0 @@
> -* Synopsys ARC UART : Non standard UART used in some of the ARC FPGA boards
> -
> -Required properties:
> -- compatible		: "snps,arc-uart"
> -- reg			: offset and length of the register set for the device.
> -- interrupts		: device interrupt
> -- clock-frequency	: the input clock frequency for the UART
> -- current-speed		: baud rate for UART
> -
> -e.g.
> -
> -arcuart0: serial@...c1000 {
> -	compatible = "snps,arc-uart";
> -	reg = <0xc0fc1000 0x100>;
> -	interrupts = <5>;
> -	clock-frequency = <80000000>;
> -	current-speed = <115200>;
> -};
> -
> -Note: Each port should have an alias correctly numbered in "aliases" node.
> -
> -e.g.
> -aliases {
> -	serial0 = &arcuart0;
> -};
> diff --git a/Documentation/devicetree/bindings/serial/snps,arc-uart.yaml b/Documentation/devicetree/bindings/serial/snps,arc-uart.yaml
> new file mode 100644
> index 000000000000..dd3096fbfb6a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/snps,arc-uart.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/serial/snps,arc-uart.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Synopsys ARC UART
> +
> +maintainers:
> +  - Vineet Gupta <vgupta@...nel.org>
> +
> +description:
> +  Synopsys ARC UART is a non-standard UART used in some of the ARC FPGA boards.
> +
> +allOf:
> +  - $ref: /schemas/serial/serial.yaml#
> +
> +properties:
> +  compatible:
> +    const: snps,arc-uart
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clock-frequency:
> +    description: the input clock frequency for the UART
> +
> +  current-speed:
> +    description: baud rate for UART
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clock-frequency
> +  - current-speed
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    serial@...c1000 {
> +        compatible = "snps,arc-uart";
> +        reg = <0xc0fc1000 0x100>;
> +        interrupts = <5>;
> +        clock-frequency = <80000000>;
> +        current-speed = <115200>;
> +    };