linux-kernel - Re: [PATCH v4 2/2] PCI: mediatek-gen3: Add support for restricting link width

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Message-ID: <20241106140217.GA2745640@rocinante>
Date: Wed, 6 Nov 2024 23:02:17 +0900
From: Krzysztof Wilczyński <kw@...ux.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: linux-pci@...r.kernel.org, ryder.lee@...iatek.com,
	jianjun.wang@...iatek.com, lpieralisi@...nel.org, robh@...nel.org,
	bhelgaas@...gle.com, matthias.bgg@...il.com,
	linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, kernel@...labora.com,
	fshao@...omium.org,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: Re: [PATCH v4 2/2] PCI: mediatek-gen3: Add support for restricting
 link width

Hello,

> > Does this make sense here?  Thoughts?
[...]
> There's a problem here: this property has to be optional - and if you change that
> to return like that, you're breaking compatibility with older device trees, which
> are not specifying any "num-lanes" property.

Makes sense.  I will keep your version.  Thank you!

	Krzysztof