Hi!

On Tue, Feb 18, 2020 at 8:55 PM Mark Brown [off-list ref] 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.

quoted

3. removing the old driver. I'll create this commit after 1 and 2 are
   applied to avoid possible rebasing due to any changes in the old
   driver.

This isn't great as it means we have a period with two drivers for the
same thing in tree which is at best going to be confusing.  There's no
advantage to splitting this out.

Got it. I'll add this patch in v2.

--
Regards,
Chuanhong Guo

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