From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH 0/2] rewrite mtk-quadspi spi-nor driver with spi-mem
Date: Thu, 20 Feb 2020 19:51:22 +0000
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To: Chuanhong Guo <gch981213-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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On Thu, Feb 20, 2020 at 07:58:06AM +0800, Chuanhong Guo wrote:
> On Tue, Feb 18, 2020 at 8:55 PM Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:

> > This is an ABI break so you shouldn't be doing this, if the existing
> > binding works it should continue to work.

> The missing spi-max-frequency is the only part preventing old
> device tree to work with this driver.
> If the goal is to make existing dt binding work, I could patch dt using
> of_add_property in v2. I saw similar device tree patching for legacy
> bindings in pinctrl-single driver.

That's fine I think, so long as old DTs continue to work.

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