netdev - Re: [PATCH net-next 03/13] ravb: Add no_ptp_cfg_active to struct ravb_hw

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Message-ID: <9264c6ca-7c98-d320-c808-1677fb62ed47@omp.ru>
Date:   Wed, 25 Aug 2021 23:17:47 +0300
From:   Sergey Shtylyov <s.shtylyov@....ru>
To:     Biju Das <biju.das.jz@...renesas.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
CC:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Andrew Lunn <andrew@...n.ch>,
        Sergei Shtylyov <sergei.shtylyov@...il.com>,
        "Geert Uytterhoeven" <geert+renesas@...der.be>,
        Adam Ford <aford173@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        <netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>
Subject: Re: [PATCH net-next 03/13] ravb: Add no_ptp_cfg_active to struct
 ravb_hw_info

On 8/25/21 10:01 AM, Biju Das wrote:

> There are some H/W differences for the gPTP feature between
> R-Car Gen3, R-Car Gen2, and RZ/G2L as below.
> 
> 1) On R-Car Gen2, gPTP support is not active in config mode.
> 2) On R-Car Gen3, gPTP support is active in config mode.
> 3) RZ/G2L does not support the gPTP feature.
> 
> Add a no_ptp_cfg_active hw feature bit to struct ravb_hw_info for
> handling gPTP for R-Car Gen2.
> 
> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
>  drivers/net/ethernet/renesas/ravb.h      |  1 +
>  drivers/net/ethernet/renesas/ravb_main.c | 20 ++++++++++++--------
>  2 files changed, 13 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
> index da486e06b322..9ecf1a8c3ca8 100644
> --- a/drivers/net/ethernet/renesas/ravb.h
> +++ b/drivers/net/ethernet/renesas/ravb.h
> @@ -998,6 +998,7 @@ struct ravb_hw_info {
>  	unsigned internal_delay:1;	/* AVB-DMAC has internal delays */
>  	unsigned tx_counters:1;		/* E-MAC has TX counters */
>  	unsigned multi_irqs:1;		/* AVB-DMAC and E-MAC has multiple irqs */
> +	unsigned no_ptp_cfg_active:1;	/* AVB-DMAC does not support gPTP active in config mode */

   Isn't this better to name it 'ptp_active_cfg' -- positive, instead of negative?

[...]

MBR, Sergey