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From:   Rob Herring <robh+dt@kernel.org>
Date:   Mon, 5 Mar 2018 08:05:22 -0600
Message-ID: <CAL_JsqLJc53uDBeXAa=Sa=2E6x=r6uYy9GBjH0qwvO0+MVmSCg@mail.gmail.com>
Subject: Re: [PATCH v2 1/8] dt-bindings: scsi: hisi_sas: add an property of
 signal attenuation
To:     John Garry <john.garry@huawei.com>
Cc:     "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Mark Rutland <mark.rutland@arm.com>,
        linux-scsi@vger.kernel.org, devicetree@vger.kernel.org,
        Linuxarm <linuxarm@huawei.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Xiaofei Tan <tanxiaofei@huawei.com>
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On Fri, Mar 2, 2018 at 10:10 AM, John Garry <john.garry@huawei.com> wrote:
> On 02/03/2018 15:57, Rob Herring wrote:
>>
>> On Fri, Mar 2, 2018 at 9:06 AM, John Garry <john.garry@huawei.com> wrote:
>>>
>>> > From: Xiaofei Tan <tanxiaofei@huawei.com>
>>> >
>>> > For some new boards with hip07 chipset we are required to
>>> > set PHY config registers differently. The hw property which
>>> > determines how to set these registers is in the PHY signal
>>> > attenuation readings.
>>> >
>>> > This patch add an devicetree property, hisi-signal-attenuation,
>>> > which is used to describe the signal attenuation of an board.
>>> >
>>> > Cc: Rob Herring <robh+dt@kernel.org>
>>> > Cc: Mark Rutland <mark.rutland@arm.com>
>>> > Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
>>> > Signed-off-by: John Garry <john.garry@huawei.com>
>>> > ---
>>> >  Documentation/devicetree/bindings/scsi/hisilicon-sas.txt | 7 +++++++
>>> >  1 file changed, 7 insertions(+)
>>> >
>>> > diff --git a/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
>>> > b/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
>>> > index df3bef7..6f6876a 100644
>>> > --- a/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
>>> > +++ b/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
>>> > @@ -53,6 +53,13 @@ Main node required properties:
>>> >  Optional main node properties:
>>> >   - hip06-sas-v2-quirk-amt : when set, indicates that the v2 controller
>>> > has the
>>> >                             "am-max-transmissions" limitation.
>>> > + - hisi-signal-attenuation : array of 3 32-bit values, containing
>>> > de-emphasis,
>>
>> The format for vendor prefixes is: <vendor prefix>,property-name
>>
>> And should only be ones defined in vendor-prefixes.txt
>
>
> Hi Rob,
>
> To save a v4, that would be "hisilicon,signal-attenuation", right?

Right.

Rob