linux-kernel - Re: [PATCH v2 22/35] nds32: Device tree support

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Date:   Mon, 27 Nov 2017 13:14:28 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Greentime Hu <green.hu@...il.com>
Cc:     greentime@...estech.com,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        netdev <netdev@...r.kernel.org>, deanbo422@...il.com,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        David Howells <dhowells@...hat.com>,
        Will Deacon <will.deacon@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        Vincent Chen <vincentc@...estech.com>
Subject: Re: [PATCH v2 22/35] nds32: Device tree support

On Mon, Nov 27, 2017 at 1:07 PM, Rob Herring <robh+dt@...nel.org> wrote:
> On Mon, Nov 27, 2017 at 6:28 AM, Greentime Hu <green.hu@...il.com> wrote:
>> From: Greentime Hu <greentime@...estech.com>
>>
>> This patch adds support for device tree.
>>
>> Signed-off-by: Vincent Chen <vincentc@...estech.com>
>> Signed-off-by: Greentime Hu <greentime@...estech.com>
>> ---
>>  arch/nds32/boot/dts/Makefile   |    8 ++++++
>>  arch/nds32/boot/dts/ae3xx.dts  |   55 ++++++++++++++++++++++++++++++++++++
>>  arch/nds32/boot/dts/ag101p.dts |   60 ++++++++++++++++++++++++++++++++++++++++
>>  arch/nds32/kernel/devtree.c    |   45 ++++++++++++++++++++++++++++++
>>  4 files changed, 168 insertions(+)
>>  create mode 100644 arch/nds32/boot/dts/Makefile
>>  create mode 100644 arch/nds32/boot/dts/ae3xx.dts
>>  create mode 100644 arch/nds32/boot/dts/ag101p.dts
>>  create mode 100644 arch/nds32/kernel/devtree.c
>>
>> diff --git a/arch/nds32/boot/dts/Makefile b/arch/nds32/boot/dts/Makefile
>> new file mode 100644
>> index 0000000..d31faa8
>> --- /dev/null
>> +++ b/arch/nds32/boot/dts/Makefile
>> @@ -0,0 +1,8 @@
>> +ifneq '$(CONFIG_NDS32_BUILTIN_DTB)' '""'
>
> Built-in dtb's are really for legacy bootloader cases where the
> bootloader doesn't understand dtbs. Do you have that here?
>
> Plus, I don't see any code here to handle the built-in dtb.

I see it is in patch 2. That means patch 2 won't actually compile. You
should move the devtree.c parts at least and maybe the Makefile
infrastructure part too to patch 2. I don't think you need to split
things up so much, but I'll defer to Arnd on that.

Rob