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

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Message-ID: <CAMuHMdXB-kEU7QVuMH1SNrwg+VPbHeOVQS3rjhcgQRFwoMsgdA@mail.gmail.com>
Date:   Fri, 16 Jul 2021 09:47:17 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     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>,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH 2/6] can: rcar_canfd: Add support for RZ/G2L family

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?

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