netdev - RE: [PATCH net-next v2 7/8] ravb: Add internal delay hw feature to struct ravb_hw

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Message-ID: <OS0PR01MB5922974FA17E6ABB4697B6B986F19@OS0PR01MB5922.jpnprd01.prod.outlook.com>
Date:   Wed, 4 Aug 2021 05:13:12 +0000
From:   Biju Das <biju.das.jz@...renesas.com>
To:     Sergei Shtylyov <sergei.shtylyov@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
CC:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Sergey Shtylyov <s.shtylyov@...russia.ru>,
        Adam Ford <aford173@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Yuusuke Ashizuka <ashiduka@...itsu.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: RE: [PATCH net-next v2 7/8] ravb: Add internal delay hw feature to
 struct ravb_hw_info

Hi Sergei,

Thanks for the feedback

> Subject: Re: [PATCH net-next v2 7/8] ravb: Add internal delay hw feature
> to struct ravb_hw_info
> 
> On 8/2/21 1:26 PM, Biju Das wrote:
> 
> > R-Car Gen3 supports TX and RX clock internal delay modes, whereas
> > R-Car
> > Gen2 and RZ/G2L do not support it.
> > Add an internal_delay hw feature bit to struct ravb_hw_info to enable
> > this only for R-Car Gen3.
> >
> > Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > ---
> > v2:
> >  * Incorporated Andrew and Sergei's review comments for making it
> smaller patch
> >    and provided detailed description.
> > ---
> >  drivers/net/ethernet/renesas/ravb.h      | 3 +++
> >  drivers/net/ethernet/renesas/ravb_main.c | 6 ++++--
> >  2 files changed, 7 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/renesas/ravb.h
> > b/drivers/net/ethernet/renesas/ravb.h
> > index 3df813b2e253..0d640dbe1eed 100644
> > --- a/drivers/net/ethernet/renesas/ravb.h
> > +++ b/drivers/net/ethernet/renesas/ravb.h
> > @@ -998,6 +998,9 @@ struct ravb_hw_info {
> >  	int num_tx_desc;
> >  	int stats_len;
> >  	size_t skb_sz;
> > +
> > +	/* hardware features */
> > +	unsigned internal_delay:1;	/* RAVB has internal delays */
> 
>    Oops, missed it initially:
>    RAVB? That's not a device name, according to the manuals. It seems to
> be the driver's name.

OK. will change it to AVB-DMAC has internal delays.

Cheers,
Biju