Re: [PATCHv3 1/2] dt-bindings: mfd: syscon: Add ti,j721e-acspcie-proxy-ctrl compatible

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On Wed, Jan 08, 2025 at 09:09:37AM -0600, Andrew Davis wrote:

Hello Andrew,

> On 1/8/25 7:11 AM, Nishanth Menon wrote:
> > On 14:46-20250107, Kevin Hilman wrote:
> > > Nishanth Menon <nm@xxxxxx> writes:
> > > 
> > > > On 15:07-20241205, Kevin Hilman wrote:
> > > > > 
> > > > > On Mon, 02 Dec 2024 15:33:30 +0100, Romain Naour wrote:
> > > > > > The ACSPCIE_PROXY_CTRL registers within the CTRL_MMR space of TI's J721e
> > > > > > SoC are used to drive the reference clock to the PCIe Endpoint device via
> > > > > > the PAD IO Buffers. Add the compatible for allowing the PCIe driver to
> > > > > > obtain the regmap for the ACSPCIE_CTRL register within the System
> > > > > > Controller device-tree node in order to enable the PAD IO Buffers.
> > > > > > 
> > > > > > The Technical Reference Manual for J721e SoC with details of the
> > > > > > ASCPCIE_CTRL registers is available at:
> > > > > > https://www.ti.com/lit/zip/spruil1
> > > > > > 
> > > > > > [...]
> > > > > 
> > > > > Applied, thanks!
> > > > > 
> > > > > [1/2] dt-bindings: mfd: syscon: Add ti,j721e-acspcie-proxy-ctrl compatible
> > > > >        commit: d8efc0b428856137608ffcbb6994da6041c9fe2a
> > > > > [2/2] arm64: dts: ti: k3-j721e-beagleboneai64: Enable ACSPCIE output for PCIe1
> > > > >        commit: 1d5e14a20dc60b440c60bec8489acfd45cdf7508
> > > > > 
> > > > > Best regards,
> > > > > -- 
> > > > > Kevin Hilman <khilman@xxxxxxxxxxxx>
> > > > > 
> > > > This will need a bit of fixup - See along the lines of the following.
> > > > Additionally, we should be a bit careful about the dependency of dts
> > > > mix up from two trees.
> > > 
> > > sorry, these should be going through your tree in the first place.  They
> > > are now dropped from my tree, please go ahead and take them along with
> > > Andrews fixup.  Sorry for complicating things.
> > 
> > 
> > Romain,
> > 
> > There is additional fixups needed, unfortunately as well: syscon yaml
> > has two lists based on which dt-schema version you use.. your patch
> > fixed one list, but missed the other as well. Could you integrate the
> > fixes and resubmit, please?
> > 
> > 
> 
> Or since we already have 'ti,j784s4-acspcie-proxy-ctrl' for the same
> reason, you could drop the first patch and re-use this compatible.

I had suggested this in the past since the ACSPCIE IP on J784S4 and J721E
is the same, but Krzysztof insists that there will be hardware differences
in the ACSPCIE block across J784S4 and J721E irrespective of what the
datasheet says, as mentioned by Krzysztof at:
https://lore.kernel.org/r/1bfdf1f1-7542-4149-a85d-2ac4b659b26b@xxxxxxxxxx/
Therefore Romain had to introduce a new compatible for J721E.

Regards,
Siddharth.




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