netdev - RE: [PATCH 3/9] ravb: Separate use of GIC reg for PTME from multi

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Date:   Thu, 5 May 2022 08:26:20 +0000
From:   Phil Edworthy <phil.edworthy@...esas.com>
To:     Sergey Shtylyov <s.shtylyov@....ru>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>
CC:     Biju Das <biju.das.jz@...renesas.com>,
        Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>
Subject: RE: [PATCH 3/9] ravb: Separate use of GIC reg for PTME from
 multi_irqs

Hi Sergey,

On 04 May 2022 21:40 Sergey Shtylyov wrote:
> On 5/4/22 5:54 PM, Phil Edworthy wrote:
> 
> > When the HW has a single interrupt, the driver currently uses the
> > PTME (Presentation Time Match Enable) bit in the GIC register to
> > enable/disable the PTM irq. Otherwise, it uses the GIE/GID registers.
> >
> > However, other SoCs, e.g. RZ/V2M, have multiple irqs and use the GIC
> > register PTME bit, so separate it out as it's own feature.
> >
> > Signed-off-by: Phil Edworthy <phil.edworthy@...esas.com>
> > Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
> > ---
> >  drivers/net/ethernet/renesas/ravb.h      | 1 +
> >  drivers/net/ethernet/renesas/ravb_main.c | 1 +
> >  drivers/net/ethernet/renesas/ravb_ptp.c  | 4 ++--
> >  3 files changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/renesas/ravb.h
> b/drivers/net/ethernet/renesas/ravb.h
> > index 08062d73df10..15aa09d93ff0 100644
> > --- a/drivers/net/ethernet/renesas/ravb.h
> > +++ b/drivers/net/ethernet/renesas/ravb.h
> > @@ -1029,6 +1029,7 @@ struct ravb_hw_info {
> >  	unsigned multi_irqs:1;		/* AVB-DMAC and E-MAC has multiple
> irqs */
> >  	unsigned gptp:1;		/* AVB-DMAC has gPTP support */
> >  	unsigned ccc_gac:1;		/* AVB-DMAC has gPTP support active in
> config mode */
> > +	unsigned gptp_ptm_gic:1;	/* gPTP enables Presentation Time
> Match irq via GIC */
> 
>    I think this needs to be controlled by the 'irq_en_dis' feature bit
> from the patch #4.
Good point, I'll fix and squash the two patches.

Thanks
Phil