linux-kernel - Re: [PATCH v2 0/3] riscv: dts: starfive: add Milkv Mars board device tree

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Message-ID: <ZZ6iXsDJVs3FIrOl@xhacker>
Date: Wed, 10 Jan 2024 21:57:50 +0800
From: Jisheng Zhang <jszhang@...nel.org>
To: Conor Dooley <conor@...nel.org>
Cc: Emil Renner Berthing <emil.renner.berthing@...onical.com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Emil Renner Berthing <kernel@...il.dk>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 0/3] riscv: dts: starfive: add Milkv Mars board device
 tree

On Wed, Jan 10, 2024 at 01:53:11PM +0000, Conor Dooley wrote:
> On Sat, Dec 02, 2023 at 02:07:50PM -0800, Emil Renner Berthing wrote:
> > Jisheng Zhang wrote:
> > > The Milkv Mars is a development board based on the Starfive JH7110 SoC.
> > > The board features:
> > >
> > > - JH7110 SoC
> > > - 1/2/4/8 GiB LPDDR4 DRAM
> > > - AXP15060 PMIC
> > > - 40 pin GPIO header
> > > - 3x USB 3.0 host port
> > > - 1x USB 2.0 host port
> > > - 1x M.2 E-Key
> > > - 1x eMMC slot
> > > - 1x MicroSD slot
> > > - 1x QSPI Flash
> > > - 1x 1Gbps Ethernet port
> > > - 1x HDMI port
> > > - 1x 2-lane DSI and 1x 4-lane DSI
> > > - 1x 2-lane CSI
> > >
> > > patch1 adds 'cpus' label
> > > patch2 adds "milkv,mars" board dt-binding
> > > patch3 adds the devicetree file describing the currently supported
> > > features:
> > > Namely PMIC, UART, I2C, GPIO, SD card, QSPI Flash, eMMC and Ethernet.
> > >
> > > Since v1:
> > >  - add two new patches which add "cpus" label and board dt-binding
> > >  - adopt Krzysztof's suggestions, thanks
> > >
> > > Hi Conor,
> > >
> > > I see you have sent a patch which moves the timebase-frequency property
> > > to soc dtsi, but this series doesn't rebase on that. I can update it
> > > once your patch is merged.
> > 
> > Hi Jisheng,
> > 
> > Thanks for working on this! On the JH7110 the mtime derives almost directly
> > from the external oscillator like this:
> > 
> > osc (24MHz) -> rtc_toggle (div 6) -> mtime (4MHz)
> > 
> > So to me it makes sense to define the timebase-frequency in the same file as
> > the frequency of the external oscillator.
> > 
> > In general it looks good, but if you do
> > 
> >   diff -Naur jh7110-{starfive-visionfive-2.dtsi,milkv-mars.dts}
> > 
> > you'll see that those two files are almost identical. Even external clock
> > speeds and all the pin configuration are the same. I'd strongly prefer to have
> > all that factored out in a common .dtsi so fixes don't get out of sync.
> 
> I'm gonna mark this as changes requested on patchwork because of this
> comment. LMK if you don't think this is worth another version Emil.

Yeah a new version is needed. And I think it's a bit late for this
window, so the new version will be out once v6.8-rc1 is out.

Thanks