linux-kernel - Re: [PATCH 09/15] dt-bindings: serial: add support for Ambarella

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Date:   Wed, 25 Jan 2023 10:56:15 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Li Chen <me@...ux.beauty>
Cc:     Li Chen <lchen@...arella.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        "moderated list:ARM/Ambarella SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 09/15] dt-bindings: serial: add support for Ambarella

On 25/01/2023 10:54, Li Chen wrote:
> 
> Hi Krzysztof Kozlowski,
> 
> Sorry for my late reply.
> 
> On Mon, 23 Jan 2023 16:11:52 +0800,
> Krzysztof Kozlowski wrote:
>>
>> On 23/01/2023 08:32, Li Chen wrote:
>>> Add compatible for Ambarella.
>>>
>>> Signed-off-by: Li Chen <lchen@...arella.com>
>>> Change-Id: I32513d98f52af0311dfb55dd5c4739a58f6b9fc1
>>> ---
>>>  .../bindings/serial/ambarella_uart.yaml       | 57 +++++++++++++++++++
>>>  MAINTAINERS                                   |  1 +
>>>  2 files changed, 58 insertions(+)
>>>  create mode 100644 Documentation/devicetree/bindings/serial/ambarella_uart.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/serial/ambarella_uart.yaml b/Documentation/devicetree/bindings/serial/ambarella_uart.yaml
>>> new file mode 100644
>>> index 000000000000..238d68078270
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/serial/ambarella_uart.yaml
>>> @@ -0,0 +1,57 @@
>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/serial/ambarella_uart.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Ambarella S6LM SoC UART Controller
>>> +
>>> +maintainers:
>>> +  - Li Chen <lchen@...arella.com>
>>> +
>>> +properties:
>>> +  compatible:
>>> +    const: ambarella,uart
>>> +
>>> +  reg:
>>> +    maxItems: 1
>>> +
>>> +  amb,ignore-fe:
>>> +    description: |
>>> +      ignore frame error report for CV2/CV22/CV25/S6LM because it's
>>> +      checked too strict so that normal stop may be treated as frame error.
>>
>> Missing type. I don't understand why this is property of DT.
> 
> Ok, I will add "type: boolean" to it.

I still do not understand why this is a property of DT. You need to
justify it.

Otherwise: No. drop it.

Best regards,
Krzysztof