linux-kernel - Re: [PATCH 2/6] can: rcar_canfd: Add support for RZ/G2L family

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Message-ID: <CA+V-a8tgF6nDKHnEG429cj=+YDNvP0jF0Wz+r2sO-FU_f7dJUg@mail.gmail.com>
Date:   Fri, 16 Jul 2021 09:32:48 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Rob Herring <robh+dt@...nel.org>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        linux-can@...r.kernel.org, netdev <netdev@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH 2/6] can: rcar_canfd: Add support for RZ/G2L family

Hi Geert,

On Fri, Jul 16, 2021 at 8:47 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Thu, Jul 15, 2021 at 8:21 PM Lad Prabhakar
> <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> > CANFD block on RZ/G2L SoC is almost identical to one found on
> > R-Car Gen3 SoC's.
> >
> > On RZ/G2L SoC interrupt sources for each channel are split into
> > different sources, irq handlers for the same are added.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
>
> Thanks for your patch!
>
> > --- a/drivers/net/can/rcar/rcar_canfd.c
> > +++ b/drivers/net/can/rcar/rcar_canfd.c
> > @@ -1070,6 +1077,56 @@ static void rcar_canfd_tx_done(struct net_device *ndev)
> >         can_led_event(ndev, CAN_LED_EVENT_TX);
> >  }
> >
> > +static irqreturn_t rcar_canfd_global_err_interrupt(int irq, void *dev_id)
> > +{
>
> > +static irqreturn_t rcar_canfd_global_recieve_fifo_interrupt(int irq, void *dev_id)
> > +{
>
> >  static irqreturn_t rcar_canfd_global_interrupt(int irq, void *dev_id)
> >  {
> >         struct rcar_canfd_global *gpriv = dev_id;
> > @@ -1139,6 +1196,56 @@ static void rcar_canfd_state_change(struct net_device *ndev,
> >         }
> >  }
> >
> > +static irqreturn_t rcar_canfd_channel_tx_interrupt(int irq, void *dev_id)
> > +{
>
> > +static irqreturn_t rcar_canfd_channel_err_interrupt(int irq, void *dev_id)
> > +{
>
> It looks like the new split interrupt handlers duplicate code from
> the existing unified interrupt handlers.  Perhaps the latter can be
> made to call the former instead?
>
Agreed.

Cheers,
Prabhakar

> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds