Re: [PATCH 3/4] dt-bindings: spi: add binding doc for spi-mtk-snfi

[Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>]

On 03/04/2022 17:45, Chuanhong Guo wrote:
> Hi!
> 
> On Sun, Apr 3, 2022 at 11:37 PM Krzysztof Kozlowski
> <krzysztof.kozlowski@linaro.org> wrote:
>> [...]
>>> +  compatible:
>>> +    enum:
>>> +      - mediatek,mt7622-snand
>>> +      - mediatek,mt7629-snand
>>
>> One blank line, please.
> 
> I'll fix this in the next version.
> 
>>
>>> +  reg:
>>> +    items:
>>> +      - description: core registers
>>> +
>>> +  interrupts:
>>> +    items:
>>> +      - description: NFI interrupt
>>> +
>>> +  clocks:
>>> +    items:
>>> +      - description: clock used for the controller
>>> +      - description: clock used for the SPI bus
>>> +
>>> +  clock-names:
>>> +    items:
>>> +      - const: nfi_clk
>>> +      - const: pad_clk
>>> +
>>> +  ecc-engine:
>>
>> The nand-chip.yaml defines a nand-ecc-engine, so how about using that
>> one? I know mtk-nand.txt uses ecc-engine, but for new schema better to
>> use properties from existing YAML.
> 
> The ecc-engine code is shared between mtk_nand.c and this driver, and
> the property name is defined in the shared part. I left it as-is so that
> existing dt for mtk_nand doesn't break.

This can be easily fixed with:
	np = of_parse_phandle(of_node, "nand-ecc-engine", 0);
	if (!np) {
		/* Backwards compatible */
		np = of_parse_phandle(of_node, "ecc-engine", 0);
	}

I would like to avoid having one property in generic NAND schema and
keep adding something slightly different everywhere else.

Best regards,
Krzysztof