linux-kernel - Re: [PATCH v2] Since am437x have the same clock structure with am335x [1][2], reuse the code from Tony Lindgren's patch [3] to fix dcan probe failed on am437x platform.

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Message-ID: <CAL9mu0L5=khi2oXaei=EhTmRJC5mC1hj5gZVBHJgowi_3vxk=Q@mail.gmail.com>
Date:   Tue, 14 Jul 2020 13:21:07 +0800
From:   dillon min <dillon.minfei@...il.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Benoit Cousson <bcousson@...libre.com>, tony@...mide.com,
        Rob Herring <robh+dt@...nel.org>, linux-omap@...r.kernel.org,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] Since am437x have the same clock structure with am335x
 [1][2], reuse the code from Tony Lindgren's patch [3] to fix dcan probe
 failed on am437x platform.

On Tue, Jul 14, 2020 at 11:54 AM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi Dillon,
>
> On Tue, 14 Jul 2020 11:43:31 +0800 dillon min <dillon.minfei@...il.com> wrote:
> >
> > On Tue, Jul 14, 2020 at 11:38 AM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> > >
> > > On Tue, 14 Jul 2020 11:23:18 +0800 dillon.minfei@...il.com wrote:
> > > >
> > > > From: dillon min <dillon.minfei@...il.com>
> > > >
> > > > Fixes: 1a5cd7c23cc5 ("bus: ti-sysc: Enable all clocks directly during init to read revision")
> > > >
> > > > [1]: https://www.ti.com/lit/pdf/spruh73 Chapter-23, Figure 23-1. DCAN
> > > > Integration
> > > > [2]: https://www.ti.com/lit/pdf/spruhl7 Chapter-25, Figure 25-1. DCAN
> > > > Integration
> > > > [3]: commit 516f1117d0fb ("ARM: dts: Configure osc clock for d_can on am335x")
> > > >
> > > > Signed-off-by: dillon min <dillon.minfei@...il.com>
> > > > ---
> > > >
> > > > Hi Stephen,
> > > >
> > > > This changes correct commit messages based on your reviewing.
> > > > make Fixes tags to oneline.
> > > > make all commit message tags at the end of commit message
> > >
> > > But the Fixes: line should be down with the Signed-off-by: line ...
> > >
> > Ok, should it be like this，i will resubmit it.
> >
> > Subject: [PATCH v2] Since am437x have the same clock structure with am335x
> >  [1][2], reuse the code from Tony Lindgren's patch [3] to fix dcan
> >  probe failed on the am437x platform.
>
> You should have a shorter subject and maybe the above could be the
> first paragraph of the commit message.
>
> >
> > [1]: https://www.ti.com/lit/pdf/spruh73 Chapter-23, Figure 23-1. DCAN
> > Integration
> > [2]: https://www.ti.com/lit/pdf/spruhl7 Chapter-25, Figure 25-1. DCAN
> > Integration
> > [3]: commit 516f1117d0fb ("ARM: dts: Configure osc clock for d_can on am335x")
> >
> > Signed-off-by: dillon min <dillon.minfei@...il.com>
> > Fixes: 1a5cd7c23cc5 ("bus: ti-sysc: Enable all clocks directly during
> > init to read revision")
>
> No wrapping the the Fixes line, please and it would usually go before
> your Signed=off-by line

Hi Stephen,

Thanks, how about the below commit message.

Subject: [PATCH v4] Fix dcan driver probe failed on am437x platform

Got following d_can probe errors with kernel 5.8-rc1 on am437x

[   10.730822] CAN device driver interface
Starting Wait for Network to be Configured...
[  OK  ] Reached target Network.
[   10.787363] c_can_platform 481cc000.can: probe failed
[   10.792484] c_can_platform: probe of 481cc000.can failed with
error -2
[   10.799457] c_can_platform 481d0000.can: probe failed
[   10.804617] c_can_platform: probe of 481d0000.can failed with
error -2

actually, Tony has fixed this issue on am335x with the patch [3]

Since am437x has the same clock structure with am335x
[1][2], so reuse the code from Tony Lindgren's patch [3] to fix it.


[1]: https://www.ti.com/lit/pdf/spruh73 Chapter-23, Figure 23-1. DCAN
Integration
[2]: https://www.ti.com/lit/pdf/spruhl7 Chapter-25, Figure 25-1. DCAN
Integration
[3]: commit 516f1117d0fb ("ARM: dts: Configure osc clock for d_can on am335x")

Fixes: 1a5cd7c23cc5 ("bus: ti-sysc: Enable all clocks directly during
init to read revision")
Signed-off-by: dillon min <dillon.minfei@...il.com>
---

Hi Stephen,

This changes correct commit messages based on your reviewing.
make Fixes tags to oneline.
make all commit message tags at the end of commit message
make Fixes tags before Signed-off-by line.
add probe failed log to commit message.


> --
> Cheers,
> Stephen Rothwell