netdev - Re: [PATCH 3/4] dt-bindings: net: can: Document transceiver implementation as phy

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Date:   Wed, 14 Apr 2021 12:19:43 +0530
From:   Aswath Govindraju <a-govindraju@...com>
To:     Rob Herring <robh@...nel.org>
CC:     Vignesh Raghavendra <vigneshr@...com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Lokesh Vutla <lokeshvutla@...com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Faiz Abbas <faiz_abbas@...com>,
        Chandrasekar Ramakrishnan <rcsekar@...sung.com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Vinod Koul <vkoul@...nel.org>,
        Sriram Dash <sriram.dash@...sung.com>,
        <linux-can@...r.kernel.org>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-phy@...ts.infradead.org>
Subject: Re: [PATCH 3/4] dt-bindings: net: can: Document transceiver
 implementation as phy

Hi Rob,

On 12/04/21 11:21 pm, Rob Herring wrote:
> On Fri, Apr 09, 2021 at 07:10:53PM +0530, Aswath Govindraju wrote:
>> From: Faiz Abbas <faiz_abbas@...com>
>>
>> Some transceivers need a configuration step (for example, pulling the
>> standby or enable lines) for them to start sending messages. The
>> transceiver can be implemented as a phy with the configuration done in the
>> phy driver. The bit rate limitation can the be obtained by the driver using
>> the phy node.
>>
>> Document the above implementation in the bosch mcan bindings
>>
>> Signed-off-by: Faiz Abbas <faiz_abbas@...com>
>> Signed-off-by: Aswath Govindraju <a-govindraju@...com>
>> ---
>>  Documentation/devicetree/bindings/net/can/bosch,m_can.yaml | 6 ++++++
>>  1 file changed, 6 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
>> index 798fa5fb7bb2..2c01899b1a3e 100644
>> --- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
>> +++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
>> @@ -109,6 +109,12 @@ properties:
>>    can-transceiver:
>>      $ref: can-transceiver.yaml#
>>  
>> +  phys:
>> +    minItems: 1
> 
> maxItems: 1

Will add this in the respin.

> 
>> +
>> +  phy-names:
>> +    const: can_transceiver
> 
> Kind of a pointless name. You don't really need a name if there's a 
> single entry.
> 

This name used by devm_phy_optional_get() in m_can driver to get the phy
data structure.

Thank you for the review.

Regards,
Aswath

>> +
>>  required:
>>    - compatible
>>    - reg
>> -- 
>> 2.17.1
>>