linux-kernel - Re: [PATCH] dt-bindings: serial: brcm,bcm2835-aux-uart: convert to dtschema

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Message-ID: <aa85caaa-5bfb-4a7c-9a46-a628b50e78e4@broadcom.com>
Date: Mon, 15 Apr 2024 08:17:09 -0700
From: Florian Fainelli <florian.fainelli@...adcom.com>
To: Pratik Farkase <pratikfarkase94@...il.com>
Cc: Pratik Farkase <pratik.farkase@...sweden.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Jiri Slaby <jirislaby@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>, Ray Jui <rjui@...adcom.com>,
 Scott Branden <sbranden@...adcom.com>, linux-kernel@...r.kernel.org,
 linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
 linux-rpi-kernel@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] dt-bindings: serial: brcm,bcm2835-aux-uart: convert to
 dtschema



On 4/15/2024 8:00 AM, Pratik Farkase wrote:
> Convert the Broadcom BCM2835 Auxiliar UART to newer DT schema.
> Created DT schema based on the .txt file which had
> `compatible`, `reg` `clocks` and `interrupts` as the
> required properties. This binding is used by Broadcom BCM2835
> SOC used in some Raspberry PI boards.
> Changes from original file:
> Implemented complete example which the original txt binding lacked.
> 
> Signed-off-by: Pratik Farkase <pratik.farkase@...sweden.com>
> ---
>   .../bindings/serial/brcm,bcm2835-aux-uart.txt | 18 --------
>   .../serial/brcm,bcm2835-aux-uart.yaml         | 46 +++++++++++++++++++
>   2 files changed, 46 insertions(+), 18 deletions(-)
>   delete mode 100644 Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt
>   create mode 100644 Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml
> 
> diff --git a/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt b/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt
> deleted file mode 100644
> index b5cc6297cd1b..000000000000
> --- a/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt
> +++ /dev/null
> @@ -1,18 +0,0 @@
> -* BCM2835 AUXILIAR UART
> -
> -Required properties:
> -
> -- compatible: "brcm,bcm2835-aux-uart"
> -- reg: The base address of the UART register bank.
> -- interrupts: A single interrupt specifier.
> -- clocks: Clock driving the hardware; used to figure out the baud rate
> -  divisor.
> -
> -Example:
> -
> -	uart1: serial@...15040 {
> -		compatible = "brcm,bcm2835-aux-uart";
> -		reg = <0x7e215040 0x40>;
> -		interrupts = <1 29>;
> -		clocks = <&aux BCM2835_AUX_CLOCK_UART>;
> -	};
> diff --git a/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml b/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml
> new file mode 100644
> index 000000000000..c52ba2e33f28
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml
> @@ -0,0 +1,46 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/serial/brcm,bcm2835-aux-uart.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: BCM2835 AUXILIAR UART

AUXILIARY (it was already a typo in the previous binding document, but 
let's fix it).

> +
> +maintainers:
> +  - Pratik Farkase <pratikfarkase94@...il.com>

Could you also add Stefan Wahren and myself to this list?

> +
> +allOf:
> +  - $ref: serial.yaml
> +
> +properties:
> +  compatible:
> +    const: brcm,bcm2835-aux-uart
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/bcm2835.h>
> +    #include <dt-bindings/clock/bcm2835-aux.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    uart1: serial@...15040 {
> +        compatible = "brcm,bcm2835-aux-uart";
> +        reg = <0x7e215040 0x40>;
> +        interrupts = <1 29>;
> +        clocks = <&aux BCM2835_AUX_CLOCK_UART>;
> +    };

-- 
Florian

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