Hi Neil,
On 4/10/24 16:50, neil.armstrong@xxxxxxxxxx wrote:
On 10/04/2024 15:11, Vladimir Zapolskiy wrote:
On 4/10/24 10:52, Neil Armstrong wrote:
Hi,
On 10/04/2024 09:49, Vladimir Zapolskiy wrote:
Qualcomm SM8650 SoC has three CCI controllers with two I2C busses
connected to each of them.
The CCI controllers on SM8650 are compatible with the ones found on
many other older generations of Qualcomm SoCs.
Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@xxxxxxxxxx>
---
The change is based and depends on a patch series from Jagadeesh Kona:
https://lore.kernel.org/linux-arm-msm/20240321092529.13362-1-quic_jkona@xxxxxxxxxxx/
It might be an option to add this change right to the series,
since it anyway requires a respin.
A new compatible value "qcom,sm8650-cci" is NOT added to
Documentation/devicetree/bindings/i2c/qcom,i2c-cci.yaml , because
the controller IP description and selection is covered by a generic
compatible value "qcom,msm8996-cci".
You'll still need to add qcom,sm8650-cci to the "CCI v2" list in qcom,i2c-cci.yaml,
otherwise the DTBS check fail, even if the fallback is already present.
I do recognize the problem related to a build time warning, my motivation was
to follow the rationale described in commit 3e383dce513f
("Revert "dt-bindings: i2c: qcom-cci: Document sc8280xp compatible"").
For a similar sc8280xp-cci case it was asked by Konrad to drop a new
compatible, I kindly ask the reviewers and maintainers to stick to one
of the two contradicting asks.
This is totally different, this commit added a new compatible that is used in the driver,
while here, you use a per-soc compatible that is (for now), only used in DT and uses
I'm confused, please elaborate what do you mean above by "this commit" and "here".
Could you please be more specific to avoid any possible disambiguation?
If you refer to the driver drivers/i2c/busses/i2c-qcom-cci.c, then there is no
difference between sc8280xp-cci and sm8650-cci. What is the total difference,
which you found?
the generic "qcom,msm8996-cci" as a fallback because it is considered as beeing 99%
compatible and no software change is needed.
I have no objections to revert a "Revert "dt-bindings: i2c: qcom-cci: Document sc8280xp compatible""
commit and to update the change for sm8650-cci accordingly, but as I've
already said it would be good to have and follow one common approach for both
cases, since I based my change on the maintainer's decision from the past.
--
Best wishes,
Vladimir
