netdev - Re: [PATCH 2/2] net: dsa: b53: mdio: add support for BCM53134

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Date:   Thu, 23 Mar 2023 17:49:04 +0100
From:   Álvaro Fernández Rojas <noltari@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     paul.geurts@...drive-technologies.com, jonas.gorski@...il.com,
        andrew@...n.ch, olteanv@...il.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] net: dsa: b53: mdio: add support for BCM53134

El jue, 23 mar 2023 a las 17:43, Florian Fainelli
(<f.fainelli@...il.com>) escribió:
>
> On 3/23/23 05:18, Álvaro Fernández Rojas wrote:
> > From: Paul Geurts <paul.geurts@...drive-technologies.com>
> >
> > Add support for the BCM53134 Ethernet switch in the existing b53 dsa driver.
> > BCM53134 is very similar to the BCM58XX series.
> >
> > Signed-off-by: Paul Geurts <paul.geurts@...drive-technologies.com>
> > Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
> > ---
> >   drivers/net/dsa/b53/b53_common.c | 53 +++++++++++++++++++++++++++++++-
> >   drivers/net/dsa/b53/b53_mdio.c   |  5 ++-
> >   drivers/net/dsa/b53/b53_priv.h   |  9 +++++-
> >   3 files changed, 64 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
> > index 1f9b251a5452..aaa0813e6f59 100644
> > --- a/drivers/net/dsa/b53/b53_common.c
> > +++ b/drivers/net/dsa/b53/b53_common.c
> > @@ -1282,6 +1282,42 @@ static void b53_adjust_link(struct dsa_switch *ds, int port,
> >       if (is63xx(dev) && port >= B53_63XX_RGMII0)
> >               b53_adjust_63xx_rgmii(ds, port, phydev->interface);
> >
> > +     if (is53134(dev) && phy_interface_is_rgmii(phydev)) {
>
> Why is not this in the same code block as the one for the is531x5()
> device like this:

This is what I asked on the cover letter:
> I also added a separate RGMII handling block for is53134() since according to
> Paul, BCM53134 doesn't support RGMII_CTRL_TIMING_SEL as opposed to is531x5().

Should I add it to the same block and avoid adding
RGMII_CTRL_TIMING_SEL if is53134() or is it compatible with
RGMII_CTRL_TIMING_SEL?

>
> diff --git a/drivers/net/dsa/b53/b53_common.c
> b/drivers/net/dsa/b53/b53_common.c
> index 59cdfc51ce06..1c64b6ce7e78 100644
> --- a/drivers/net/dsa/b53/b53_common.c
> +++ b/drivers/net/dsa/b53/b53_common.c
> @@ -1235,7 +1235,7 @@ static void b53_adjust_link(struct dsa_switch *ds,
> int port,
>                                tx_pause, rx_pause);
>          b53_force_link(dev, port, phydev->link);
>
> -       if (is531x5(dev) && phy_interface_is_rgmii(phydev)) {
> +       if ((is531x5(dev) || is53134(dev)) &&
> phy_interface_is_rgmii(phydev)) {
>                  if (port == dev->imp_port)
>                          off = B53_RGMII_CTRL_IMP;
>                  else
>
> Other than that, LGTM!
> --
> Florian
>

--
Álvaro.