From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Marc Zyngier <maz@kernel.org>, Maulik Shah <mkshah@codeaurora.org>
Cc: swboyd@chromium.org, linux-arm-msm@vger.kernel.org,
linux-kernel@vger.kernel.org, robh+dt@kernel.org,
dianders@chromium.org, rnayak@codeaurora.org,
lsrao@codeaurora.org, devicetree@vger.kernel.org
Subject: Re: [PATCH 1/3] arm64: dts: qcom: sm8350: Remove second reg from pdc
Date: Wed, 17 Mar 2021 13:08:02 -0500 [thread overview]
Message-ID: <YFJFgvLQfr49EvWE@builder.lan> (raw)
In-Reply-To: <87czvxj2t9.wl-maz@kernel.org>
On Wed 17 Mar 09:02 CDT 2021, Marc Zyngier wrote:
> On Wed, 17 Mar 2021 09:48:09 +0000,
> Maulik Shah <mkshah@codeaurora.org> wrote:
> >
> > Hi Marc,
> >
> > On 3/17/2021 2:47 PM, Marc Zyngier wrote:
> > > On Wed, 17 Mar 2021 05:29:54 +0000,
> > > Maulik Shah <mkshah@codeaurora.org> wrote:
> > >> PDC interrupt controller driver do not use second reg. Remove it.
> > > This is a DT file, not a driver. What the driver does is irrelevant.
> > >
> > > The real question is: what does this range do?
> > >
> > > Thanks,
> > >
> > > M.
> >
> > This is to set interrupt type in SPI config for which there was a
> > change [1] but has not gone in for upstream PDC driver.
> >
> > The second reg is not used in upstream PDC driver, probably when
> > posting downstream DT changes for sm8350/sm8250 it was carried in
> > device node as is.
> >
> > As its not mentioned in bindigs as well, dtbs_check reports it as
> > additional reg when converted to yaml.
>
> Then I'd rather you provide accurate documentation in the binding
> rather than changing the DT files. Other operating systems may use it,
> and it isn't unlikely that Linux could use the feature at some point.
>
I agree. Maulik, please update the DT binding to document this region as
well.
It also seems relevant to pursue getting [1] into the upstream Linux
kernel. Is this something that you use downstream Maulik?
Regards,
Bjorn
next prev parent reply other threads:[~2021-03-17 18:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-17 5:29 [PATCH 1/3] arm64: dts: qcom: sm8350: Remove second reg from pdc Maulik Shah
2021-03-17 5:29 ` [PATCH 2/3] arm64: dts: qcom: sm8250: " Maulik Shah
2021-03-17 5:29 ` [PATCH 3/3] dt-bindings: interrupt-controller: Convert bindings to yaml for qcom,pdc Maulik Shah
2021-03-17 9:17 ` [PATCH 1/3] arm64: dts: qcom: sm8350: Remove second reg from pdc Marc Zyngier
2021-03-17 9:48 ` Maulik Shah
2021-03-17 14:02 ` Marc Zyngier
2021-03-17 18:08 ` Bjorn Andersson [this message]
2021-03-22 10:26 ` Maulik Shah
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