MIME-Version: 1.0
In-Reply-To: <24438c4d-21c8-6302-acd4-4f0e223232ce@huawei.com>
References: <20170616065119.10704-1-butao@hisilicon.com> <20170616065119.10704-3-butao@hisilicon.com>
 <CAK8P3a2aPorzpUzwL=dkUkYNCGkhQMDPOkKRW1-=Hf=yCdvTsQ@mail.gmail.com>
 <0f79aeea-53e3-6bea-ffa6-0e057f2ff83b@huawei.com> <CAK8P3a2z7VbPb95Ltj=Duh1v_Yqxedb_g=ADNPWOrpEz1dCTuw@mail.gmail.com>
 <24438c4d-21c8-6302-acd4-4f0e223232ce@huawei.com>
From: Arnd Bergmann <arnd@arndb.de>
Date: Thu, 22 Jun 2017 14:15:54 +0200
Message-ID: <CAK8P3a1MRx5zRp5-7iDY32+6PGsyHFaOom-bkWmftpLUS=8gBA@mail.gmail.com>
Subject: Re: [PATCH v2 2/5] dt-bindings: scsi: ufs: add document for hi3660-ufs
To: Bu Tao <butao@huawei.com>
Cc: Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
        Wei Xu <xuwei5@hisilicon.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        Vinayak Holikatti <vinholikatti@gmail.com>,
        "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Kevin Hilman <khilman@baylibre.com>,
        Gregory CLEMENT <gregory.clement@free-electrons.com>,
        Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Riku Voipio <riku.voipio@linaro.org>,
        Thierry Reding <treding@nvidia.com>,
        Krzysztof Kozlowski <krzk@kernel.org>, Eric Anholt <eric@anholt.net>,
        devicetree@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        linux-scsi@vger.kernel.org, Guodong Xu <guodong.xu@linaro.org>,
        suzhuangluan@hisilicon.com, kongfei@hisilicon.com
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Content-Transfer-Encoding: 8bit
Content-Length: 1517
Lines: 44

On Thu, Jun 22, 2017 at 1:58 PM, Bu Tao <butao@huawei.com> wrote:
> 在 2017/6/22 19:51, Arnd Bergmann 写道:
>> On Thu, Jun 22, 2017 at 1:44 PM, Bu Tao <butao@huawei.com> wrote:
>>> 在 2017/6/17 5:51, Arnd Bergmann 写道:
>>>> On Fri, Jun 16, 2017 at 8:51 AM, Bu Tao <butao@hisilicon.com> wrote:
>>>
>>> I do not know wheher other SoC need to use the optional properties as
>>> abover. So here the name of the optional properties has "hi3660".
>>
>>
>> They should not have "hi3660" in their names either way, independent
>> of where they are used.
>
>
> Oh, change the "hi3660" to "hisilicon"?
> e.g. ufs-hi3660-use-rate-B  -->  ufs-hisilicon-use-rate-B

No, just 'use-rate-B', no prefix for this.

>>>> (note: this is different from the value of the "compatible" property
>>>> that
>>>> is meant to be as specific as possible".
>>>>
>>>> Also, please clarify how your binding relates to the ufshcd binding
>>>> in Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt: does
>>>> hi3660 implement any registers that are shared with ufshcd, or does
>>>> it use the same physical interface with a different register set?
>>>
>>>
>>> No, only show how to use the dt-binding for hi3660 SoC
>>
>>
>> My question was about the hardware: does hi3660 implement ufshcd
>> or not?
>
>
> YES

Ok, then the properties should be documented as optional in the
Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt file for anything
that has a proper interpretation in the context of the generic ufshcd
driver.

      Arnd