linux-kernel - Re: [PATCH v2 1/2] dt-bindings: nvmem: Add binding for RAVE SP EEPROM driver

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Message-ID: <CAHQ1cqFep9Xs3_hsz1EiDwu8mcDDzbFs4H-kLnKkj=iokX=fCg@mail.gmail.com>
Date:   Thu, 26 Apr 2018 23:05:18 -0700
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Aleksander Morgado <aleksander@...ksander.es>,
        Mark Rutland <mark.rutland@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: nvmem: Add binding for RAVE SP EEPROM driver

On Mon, Apr 16, 2018 at 8:05 AM, Rob Herring <robh@...nel.org> wrote:
> On Tue, Apr 10, 2018 at 06:59:47PM -0700, Andrey Smirnov wrote:
>> Add Device Tree bindings for RAVE SP EEPROM driver - an MFD cell of
>> parent RAVE SP driver (documented in
>> Documentation/devicetree/bindings/mfd/zii,rave-sp.txt).
>>
>> Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>> Cc: linux-kernel@...r.kernel.org
>> Cc: Chris Healy <cphealy@...il.com>
>> Cc: Lucas Stach <l.stach@...gutronix.de>
>> Cc: Aleksander Morgado <aleksander@...ksander.es>
>> Cc: Rob Herring <robh+dt@...nel.org>
>> Cc: Mark Rutland <mark.rutland@....com>
>> Cc: devicetree@...r.kernel.org
>> Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
>> ---
>>  .../bindings/nvmem/zii,rave-sp-eeprom.txt          | 29 ++++++++++++++++++++++
>>  1 file changed, 29 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/nvmem/zii,rave-sp-eeprom.txt
>>
>> diff --git a/Documentation/devicetree/bindings/nvmem/zii,rave-sp-eeprom.txt b/Documentation/devicetree/bindings/nvmem/zii,rave-sp-eeprom.txt
>> new file mode 100644
>> index 000000000000..a4e838c30b67
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/nvmem/zii,rave-sp-eeprom.txt
>> @@ -0,0 +1,29 @@
>> +Zodiac Inflight Innovations RAVE EEPROM Bindings
>> +
>> +RAVE SP EEPROM device is a "MFD cell" device exposing physical EEPROM
>> +attached to RAVE Supervisory Processor. It is expected that its Device
>> +Tree node is specified as a child of the node corresponding to the
>> +parent RAVE SP device (as documented in
>> +Documentation/devicetree/bindings/mfd/zii,rave-sp.txt)
>> +
>> +Required properties:
>> +
>> +- compatible: Should be "zii,rave-sp-eeprom"
>
> Need to state somewhere this follows the bindings/nvmem/nvmem.txt
> binding.
>

OK, will fix in v3.

>> +
>> +Example:
>> +
>> +     rave-sp {
>> +             compatible = "zii,rave-sp-rdu1";
>> +             current-speed = <38400>;
>> +
>> +             main-eeprom {
>
> eeprom@a4

Any chance I can keep it as is? I am asking because this node name is
used by the driver as device name which is how it also appears in
sysfs. Reason for that being that "main-eeprom" and "dds-eeprom"
(second EEPROM in the system) are easier to rembmer and tell apart
than "eeprom@a4" and "eeprom@a5". Granted, I can divorce naming scheme
in the driver from device node name, but then I'd have to keep a
"address -> deivce name" lookup table which I was hoping to avoid.

>
>> +                     compatible = "zii,rave-sp-eeprom";
>> +                     reg = <0xA4 0x4000>;
>
> lowercase hex please.

OK, will do in v3.

Thanks,
Andrey Smirnov