linux-kernel - Re: [PATCH] can: xilinx_can: Add Transmitter delay compensation (TDC) feature support

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Message-ID: <20220513115628.tiplo5wtucri6hy2@pengutronix.de>
Date:   Fri, 13 May 2022 13:56:28 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Vincent Mailhol <vincent.mailhol@...il.com>
Cc:     Srinivas Neeli <srinivas.neeli@...inx.com>, wg@...ndegger.com,
        davem@...emloft.net, edumazet@...gle.com,
        appana.durga.rao@...inx.com, sgoud@...inx.com,
        michal.simek@...inx.com, kuba@...nel.org, pabeni@...hat.com,
        linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        git@...inx.com
Subject: Re: [PATCH] can: xilinx_can: Add Transmitter delay compensation
 (TDC) feature support

On 13.05.2022 10:24:06, Vincent Mailhol wrote:
> >  #define XCAN_BTR_SJW_SHIFT             7  /* Synchronous jump width */
> >  #define XCAN_BTR_TS2_SHIFT             4  /* Time segment 2 */
> >  #define XCAN_BTR_SJW_SHIFT_CANFD       16 /* Synchronous jump width */
> > @@ -259,7 +261,7 @@ static const struct can_bittiming_const xcan_bittiming_const_canfd2 = {
> >         .tseg2_min = 1,
> >         .tseg2_max = 128,
> >         .sjw_max = 128,
> > -       .brp_min = 2,
> > +       .brp_min = 1,
> 
> Was there any reason to have brp_min = 2 in the first place?
> I think this change  should be a different patch. If the brp_min = 2
> is just a typo, you might also want to backport it to stable branches.

+1

Marc

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