From: <Sergiu.Moga@microchip.com>
To: <krzysztof.kozlowski@linaro.org>, <lee@kernel.org>,
<robh+dt@kernel.org>, <krzysztof.kozlowski+dt@linaro.org>,
<Nicolas.Ferre@microchip.com>, <alexandre.belloni@bootlin.com>,
<Claudiu.Beznea@microchip.com>, <richard.genoud@gmail.com>,
<radu_nicolae.pirea@upb.ro>, <gregkh@linuxfoundation.org>,
<broonie@kernel.org>, <mturquette@baylibre.com>,
<sboyd@kernel.org>, <jirislaby@kernel.org>, <admin@hifiphile.com>,
<Kavyasree.Kotagiri@microchip.com>, <Tudor.Ambarus@microchip.com>
Cc: <devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <linux-spi@vger.kernel.org>,
<linux-serial@vger.kernel.org>, <linux-clk@vger.kernel.org>
Subject: Re: [PATCH v2 05/13] dt-bindings: serial: atmel,at91-usart: convert to json-schema
Date: Thu, 8 Sep 2022 15:27:46 +0000 [thread overview]
Message-ID: <753d73d0-44b9-9fba-1ed8-53691ecf2ee7@microchip.com> (raw)
In-Reply-To: <1d3904d9-7fec-2e61-f999-61b89c4becb6@linaro.org>
On 08.09.2022 18:10, Krzysztof Kozlowski wrote:
> On 08/09/2022 17:06, Sergiu.Moga@microchip.com wrote:
>> On 08.09.2022 15:29, Krzysztof Kozlowski wrote:
>
>>>> +required:
>>>> + - compatible
>>>> + - reg
>>>> + - interrupts
>>>> + - clock-names
>>>> + - clocks
>>>> +
>>>> +allOf:
>>>> + - if:
>>>> + properties:
>>>> + $nodename:
>>>> + pattern: "^serial@[0-9a-f]+$"
>>>
>>> You should rather check value of atmel,usart-mode, because now you won't
>>> properly match device nodes called "foobar". Since usart-mode has only
>>> two possible values, this will nicely simplify you if-else.
>>>
>>>
>>
>>
>> I did think of that but the previous binding specifies that
>> atmel,usart-mode is required only for the SPI mode and it is optional
>> for the USART mode. That is why I went for the node's regex since I
>> thought it is something that both nodes would have.
>
> I think it should be explicit - you configure node either to this or
> that, so the property should be always present.
No DT of ours has that property atm, since they are all on USART mode by
default. If I were to make it required. all nodes would fail so I would
have to add it to each of them.
> The node name should not
> be responsible for it, even though we want node names to match certain
> patterns.
>
Does checkig for the node's pattern not make it better then? Since it
imposes an additional check? If it would not have a conventional
pattern, it would fail through unevaluatedProperies:false at the end,
since it would have properties that were contained inside a branch that
the validation of the node would not have gone through since it contains
a pattern that does not match the conditions of that branch.
>>
>>
>>>> + then:
>>>> + allOf:
>>>> + - $ref: /schemas/serial/serial.yaml#
>>>> + - $ref: /schemas/serial/rs485.yaml#
>>>> +
>>>> + properties:
>>>> + atmel,use-dma-rx:
>>>> + type: boolean
>>>> + description: use of PDC or DMA for receiving data
>>>> +
>>>> + atmel,use-dma-tx:
>>>> + type: boolean
>>>> + description: use of PDC or DMA for transmitting data
>>>> +
>>>> + atmel,fifo-size:
>>>> + $ref: /schemas/types.yaml#/definitions/uint32
>>>> + description:
>>>> + Maximum number of data the RX and TX FIFOs can store for FIFO
>>>> + capable USARTS.
>>>> + enum: [ 16, 32 ]
>>>
>>> I did not mention it last time, but I think it should follow generic
>>> practice, so define all properties top-level and disallow them for other
>>> type. This allows you to simply use additionalProperties:false at the end.
>>>
>>
>>
>> What would be a good example binding in this case?
>
> The example binding.
>
> https://elixir.bootlin.com/linux/v5.19/source/Documentation/devicetree/bindings/example-schema.yaml#L212
>
Ah, I understand now. I did not get what you meant by "disallow", I
guess it's just a "property-name: false".
Thanks!
>>
>>
>>>> +
>>>> + else:
>>>> + if:
>>>> + properties:
>>>> + $nodename:
>>>> + pattern: "^spi@[0-9a-f]+$"
>>>> + then:
>>>> + allOf:
>>>> + - $ref: /schemas/spi/spi-controller.yaml#
>>>> +
>>>> + properties:
>>>> + atmel,usart-mode:
>>>> + const: 1
>>>> +
>>>> + "#size-cells":
>>>> + const: 0
>>>> +
>>>> + "#address-cells":
>>>> + const: 1
>>>
>>> The same - top level and disallow them for uart.
>>>
>>
>>
>> These values of #size-cells and #address-cells are only meant for the
>> SPI so I guess I would still have to specify their mandatory const
>> values here.
>
> Sure, ok.
>
>>
>>
>>>> +
>>>> + required:
>>>> + - atmel,usart-mode
>>>> + - "#size-cells"
>>>> + - "#address-cells"
>>>
>>> End else in this branch is what?
>>>
>>
>>
>> You are right, I will remove the useless if: after else:
>
> Best regards,
> Krzysztof
Regards,
Sergiu
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next prev parent reply other threads:[~2022-09-08 15:38 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-06 13:54 [PATCH v2 00/13] Make atmel serial driver aware of GCLK Sergiu Moga
2022-09-06 13:55 ` [PATCH v2 01/13] spi: dt-bindings: atmel,at91rm9200-spi: Add DMA related properties Sergiu Moga
2022-09-06 15:12 ` Mark Brown
2022-09-06 21:41 ` Rob Herring
2022-09-07 7:54 ` Sergiu.Moga
2022-09-08 12:23 ` Krzysztof Kozlowski
2022-09-06 13:55 ` [PATCH v2 02/13] ARM: dts: at91: sama7g5: Swap rx and tx for spi11 Sergiu Moga
2022-09-06 13:55 ` [PATCH v2 03/13] dt-bindings: mfd: atmel,sama5d2-flexcom: Add SPI child node ref binding Sergiu Moga
2022-09-08 12:23 ` Krzysztof Kozlowski
2022-09-06 13:55 ` [PATCH v2 04/13] ARM: dts: at91: sam9x60ek: Add DBGU compatibles to uart1 Sergiu Moga
2022-09-06 13:55 ` [PATCH v2 05/13] dt-bindings: serial: atmel,at91-usart: convert to json-schema Sergiu Moga
2022-09-08 12:29 ` Krzysztof Kozlowski
2022-09-08 15:06 ` Sergiu.Moga
2022-09-08 15:10 ` Krzysztof Kozlowski
2022-09-08 15:27 ` Sergiu.Moga [this message]
2022-09-08 16:05 ` Krzysztof Kozlowski
2022-09-06 13:55 ` [PATCH v2 06/13] dt-bindings: serial: atmel,at91-usart: Add SAM9260 compatibles to SAM9x60 Sergiu Moga
2022-09-08 12:30 ` Krzysztof Kozlowski
2022-09-08 15:15 ` Sergiu.Moga
2022-09-09 1:36 ` Rob Herring
2022-09-12 7:45 ` Sergiu.Moga
2022-09-12 10:44 ` Krzysztof Kozlowski
2022-09-12 13:09 ` Sergiu.Moga
2022-09-13 8:58 ` Krzysztof Kozlowski
2022-09-13 9:19 ` Sergiu.Moga
2022-09-13 9:30 ` Krzysztof Kozlowski
2022-09-13 9:35 ` Sergiu.Moga
2022-09-06 13:55 ` [PATCH v2 07/13] dt-bindings: mfd: atmel,sama5d2-flexcom: Add USART child node ref binding Sergiu Moga
2022-09-08 12:33 ` Krzysztof Kozlowski
2022-09-06 13:55 ` [PATCH v2 08/13] tty: serial: atmel: Define GCLK as USART baudrate source clock Sergiu Moga
2022-09-07 9:21 ` Ilpo Järvinen
2022-09-07 9:37 ` Sergiu.Moga
2022-09-06 13:55 ` [PATCH v2 09/13] tty: serial: atmel: Define BRSRCCK bitmask of UART IP's Mode Register Sergiu Moga
2022-09-07 9:24 ` Ilpo Järvinen
2022-09-06 13:55 ` [PATCH v2 10/13] tty: serial: atmel: Only divide Clock Divisor if the IP is USART Sergiu Moga
2022-09-07 9:23 ` Ilpo Järvinen
2022-09-07 9:34 ` Sergiu.Moga
2022-09-06 13:55 ` [PATCH v2 11/13] clk: at91: sama5d2: Add Generic Clocks for UART/USART Sergiu Moga
2022-09-06 13:55 ` [PATCH v2 12/13] tty: serial: atmel: Make the driver aware of the existence of GCLK Sergiu Moga
2022-09-07 9:36 ` Ilpo Järvinen
2022-09-07 11:11 ` Sergiu.Moga
2022-09-07 11:29 ` Ilpo Järvinen
2022-09-12 8:06 ` Claudiu.Beznea
2022-09-06 13:55 ` [PATCH v2 13/13] dt-bindings: serial: atmel,at91-usart: Add gclk as a possible USART clock Sergiu Moga
2022-09-08 12:35 ` Krzysztof Kozlowski
2022-09-08 15:33 ` Sergiu.Moga
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