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Message-ID: <20200512154544.GA823@bogus>
Date:   Tue, 12 May 2020 10:45:44 -0500
From:   Rob Herring <robh@...nel.org>
To:     ansuelsmth@...il.com
Cc:     'Bjorn Andersson' <bjorn.andersson@...aro.org>,
        'Andy Gross' <agross@...nel.org>,
        'Bjorn Helgaas' <bhelgaas@...gle.com>,
        'Mark Rutland' <mark.rutland@....com>,
        'Stanimir Varbanov' <svarbanov@...sol.com>,
        'Lorenzo Pieralisi' <lorenzo.pieralisi@....com>,
        'Andrew Murray' <amurray@...goodpenguin.co.uk>,
        'Philipp Zabel' <p.zabel@...gutronix.de>,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: R: [PATCH v3 08/11] devicetree: bindings: pci: document PARF
 params bindings

On Thu, May 07, 2020 at 09:34:35PM +0200, ansuelsmth@...il.com wrote:
> > On Fri, May 01, 2020 at 12:06:15AM +0200, Ansuel Smith wrote:
> > > It is now supported the editing of Tx De-Emphasis, Tx Swing and
> > > Rx equalization params on ipq8064. Document this new optional params.
> > >
> > > Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> > > ---
> > >  .../devicetree/bindings/pci/qcom,pcie.txt     | 36 +++++++++++++++++++
> > >  1 file changed, 36 insertions(+)
> > >
> > > diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.txt
> > b/Documentation/devicetree/bindings/pci/qcom,pcie.txt
> > > index 6efcef040741..8cc5aea8a1da 100644
> > > --- a/Documentation/devicetree/bindings/pci/qcom,pcie.txt
> > > +++ b/Documentation/devicetree/bindings/pci/qcom,pcie.txt
> > > @@ -254,6 +254,42 @@
> > >  			- "perst-gpios"	PCIe endpoint reset signal line
> > >  			- "wake-gpios"	PCIe endpoint wake signal line
> > >
> > > +- qcom,tx-deemph-gen1:
> > > +	Usage: optional (available for ipq/apq8064)
> > > +	Value type: <u32>
> > > +	Definition: Gen1 De-emphasis value.
> > > +		    For ipq806x should be set to 24.
> > 
> > Unless these need to be tuned per board, then the compatible string for
> > ipq806x should imply all these settings.
> > 
> 
> It was requested by v2 to make this settings tunable. These don't change are
> all the same for every ipq806x SoC. The original implementation had this 
> value hardcoded for ipq806x. Should I restore this and drop this patch? 

Yes, please.

Rob

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