Re: [PATCH 3/4] dt-bindings: arm: qcom,ids: Add a bunch of older SoCs

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On 08/01/2023 23:40, Rob Herring wrote:
On Wed, Jan 04, 2023 at 12:53:47PM +0100, Stephan Gerhold wrote:
Sync the SoC IDs in qcom,ids.h with relevant entries from Qualcomm's LK
bootloader [1] that is used for almost all older Qualcomm SoCs.

Several of these are already supported, e.g.:
   - MSM8960 -> APQ8060, MSM8260, ...
   - MSM8976 -> APQ8076
   - MSM8956 -> APQ8056
Others are currently being worked on, e.g.:
   - MSM8909(W) -> APQ8009(W), MSM8905, MSM8209, ...
   - MSM8939 -> MSM8239, ...

And even all remaining ones added are close enough to what is already
supported so that future support is realistic (if someone steps up to
do the work).

Add all of them at once to avoid having to add them one by one in the
future. This will also benefit other projects making use of the same
dt-bindings, e.g. bootloaders where adding support for all these SoCs
is a bit easier than on Linux.

The promise was in accepting the properties upstream is we'd only be
adding these for bootloaders with dtbs that we can't otherwise update or
change. Do all of those meet this criteria? Seems unlikely.


Most of Qualcomm platforms come with the signed bootloader, so it is impossible to change it without vendor keys. This might sound bad for you, but I fear that this list would include most of the platforms until Qualcomm agrees to rework kernel-bootloader-dtb interaction.

--
With best wishes
Dmitry




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