netdev - Re: [PATCHv2 1/3] dt-bindings: net: Add DT bindings for Socionext Netsec

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Date:   Wed, 20 Dec 2017 13:32:19 +0530
From:   Jassi Brar <jassisinghbrar@...il.com>
To:     Mark Rutland <mark.rutland@....com>
Cc:     "<netdev@...r.kernel.org>" <netdev@...r.kernel.org>,
        Devicetree List <devicetree@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Arnd Bergmann <arnd.bergmann@...aro.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Masami Hiramatsu <masami.hiramatsu@...aro.org>
Subject: Re: [PATCHv2 1/3] dt-bindings: net: Add DT bindings for Socionext Netsec

Hi Mark,

On Tue, Dec 12, 2017 at 10:59 PM, Mark Rutland <mark.rutland@....com> wrote:
> Hi,
>
> On Tue, Dec 12, 2017 at 10:45:21PM +0530, jassisinghbrar@...il.com wrote:
>> From: Jassi Brar <jassisinghbrar@...il.com>
>>
>> This patch adds documentation for Device-Tree bindings for the
>> Socionext NetSec Controller driver.
>>
>> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
>> Signed-off-by: Jassi Brar <jaswinder.singh@...aro.org>
>> ---
>>  .../devicetree/bindings/net/socionext-netsec.txt   | 43 ++++++++++++++++++++++
>>  1 file changed, 43 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/net/socionext-netsec.txt
>>
>> diff --git a/Documentation/devicetree/bindings/net/socionext-netsec.txt b/Documentation/devicetree/bindings/net/socionext-netsec.txt
>> new file mode 100644
>> index 0000000..4695969
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/net/socionext-netsec.txt
>> @@ -0,0 +1,45 @@
>> +* Socionext NetSec Ethernet Controller IP
>> +
>> +Required properties:
>> +- compatible: Should be "socionext,synquacer-netsec"
>> +- reg: Address and length of the control register area, followed by the
>> +       address and length of the EEPROM holding the MAC address and
>> +       microengine firmware
>> +- interrupts: Should contain ethernet controller interrupt
>> +- clocks: phandle to the PHY reference clock, and any other clocks to be
>> +          switched by runtime_pm
>> +- clock-names: Required only if more than a single clock is listed in 'clocks'.
>> +               The PHY reference clock must be named 'phy_refclk'
>
> Please define the full set of clocks (and their names) explicitly. This
> should be well-known.
>
The issue is some implementations have just the 'rate-reference' clock
going in, while others may also have 1or2 optional 'enable' clocks
(which may go to other devices as well).
The driver only needs to know which clock to read the freq from, so it
expects that clock to be named 'phy_refclk', while the 'enable' clocks
can be named anything.

Thanks