On Thu, Oct 27, 2016 at 11:15:05AM +0200, Andrew Lunn wrote:
> On Wed, Oct 26, 2016 at 03:35:57PM -0400, Jon Mason wrote:
> > From: Vikas Soni <vsoni@xxxxxxxxxxxx>
> >
> > Add BCM54810 phy entry
>
> Hi Jon, Vikis
>
> The subject line is a bit misleading. It does more than add a PHY ID
> entry.
All of the parts are related to adding the BCM54810 Phy, but I agree it
could be more verbose about what is happening.
> > Signed-off-by: Vikas Soni <vsoni@xxxxxxxxxxxx>
> > Signed-off-by: Jon Mason <jon.mason@xxxxxxxxxxxx>
> > ---
> > drivers/net/phy/Kconfig | 2 +-
> > drivers/net/phy/broadcom.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++
> > include/linux/brcmphy.h | 7 +++++
> > 3 files changed, 73 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
> > index 45f68ea..31967ca 100644
> > --- a/drivers/net/phy/Kconfig
> > +++ b/drivers/net/phy/Kconfig
> > @@ -217,7 +217,7 @@ config BROADCOM_PHY
> > select BCM_NET_PHYLIB
> > ---help---
> > Currently supports the BCM5411, BCM5421, BCM5461, BCM54616S, BCM5464,
> > - BCM5481 and BCM5482 PHYs.
> > + BCM5481, BCM54810 and BCM5482 PHYs.
> >
> > config CICADA_PHY
> > tristate "Cicada PHYs"
> > diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c
> > index 870327e..cdce761 100644
> > --- a/drivers/net/phy/broadcom.c
> > +++ b/drivers/net/phy/broadcom.c
> > @@ -35,6 +35,35 @@ static int bcm54xx_auxctl_write(struct phy_device *phydev, u16 regnum, u16 val)
> > return phy_write(phydev, MII_BCM54XX_AUX_CTL, regnum | val);
> > }
> >
> > +static int bcm54810_config(struct phy_device *phydev)
> > +{
> > + int rc;
> > +
> > + /* Disable BroadR-Reach */
> > + rc = bcm_phy_write_exp(phydev, BCM54810_EXP_BROADREACH_LRE_MISC_CTL, 0);
> > + if (rc < 0)
> > + return rc;
> > +
> > + /* SKEW DISABLE */
> > + rc = bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC,
> > + 0xF0E0);
> > + if (rc < 0)
> > + return rc;
> > +
> > + /* DELAY DISABLE */
> > + rc = bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC,
> > + 0x7000);
>
> This driver mostly uses symbolic names, not #defines. Please can you
> use #defines here and else were in this patch.
Will do. After looking at this, this appears to be setup for a read
that doesn't follow. I'll audit this, clean it up and resend.
> > + if (rc < 0)
> > + return rc;
> > +
> > + /* DELAY DISABLE */
> > + rc = bcm_phy_write_shadow(phydev, BCM54810_SHD_CLK_CTL, 0);
> > + if (rc < 0)
> > + return rc;
>
> Twice the same comment?
>
> > +
> > + return 0;
> > +}
> > +
> > /* Needs SMDSP clock enabled via bcm54xx_phydsp_config() */
> > static int bcm50610_a0_workaround(struct phy_device *phydev)
> > {
> > @@ -207,6 +236,20 @@ static int bcm54xx_config_init(struct phy_device *phydev)
> > (phydev->dev_flags & PHY_BRCM_AUTO_PWRDWN_ENABLE))
> > bcm54xx_adjust_rxrefclk(phydev);
> >
> > + if (BRCM_PHY_MODEL(phydev) == PHY_ID_BCM54810) {
> > + err = bcm54810_config(phydev);
> > + if (err)
> > + return err;
> > +
> > + reg = phy_read(phydev, MII_BMCR);
> > + if (reg < 0)
> > + return reg;
> > +
> > + err = phy_write(phydev, MII_BMCR, reg & ~BMCR_PDOWN);
> > + if (err)
> > + return err;
>
> This seems a bit odd. I would expect the PHY core correctly handles
> the PHY being powered down. Can you explain this a bit more, why it is
> needed.
I believe it was needed in earlier versions of the code, but doesn't
seem to be needed anymore. Removing.
>
> Thanks
> Andrew
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