netdev - Re: [RFC PATCH net-next 1/4] net: phy: used the genphy_soft

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Date:   Wed, 2 Mar 2022 10:04:07 +0000
From:   <Arun.Ramadoss@...rochip.com>
To:     <andrew@...n.ch>
CC:     <linux@...linux.org.uk>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <davem@...emloft.net>,
        <hkallweit1@...il.com>, <kuba@...nel.org>
Subject: Re: [RFC PATCH net-next 1/4] net: phy: used the genphy_soft_reset for
 phy reset in Lan87xx

On Wed, 2022-03-02 at 04:19 +0100, Andrew Lunn wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you
> know the content is safe
> 
> On Mon, Feb 28, 2022 at 07:35:07PM +0530, Arun Ramadoss wrote:
> > Replaced current code for soft resetting phy to genphy_soft_reset
> > function. And added the macro for LAN87xx Phy ID.
> 
> Hi Arun
> 
> Please don't mix multiple things in one patch.
> 
> Looking at the actual path, you have:
> 
> > +#define LAN87XX_PHY_ID                       0x0007c150
> > +#define MICROCHIP_PHY_ID_MASK                0xfffffff0
> 
> Part of macros for PHY ID.
> 
> > +
> >  /* External Register Control Register */
> >  #define LAN87XX_EXT_REG_CTL                     (0x14)
> >  #define LAN87XX_EXT_REG_CTL_RD_CTL              (0x1000)
> > @@ -197,20 +200,10 @@ static int lan87xx_phy_init(struct phy_device
> > *phydev)
> >       if (rc < 0)
> >               return rc;
> > 
> > -     /* Soft Reset the SMI block */
> > -     rc = access_ereg_modify_changed(phydev, PHYACC_ATTR_BANK_SMI,
> > -                                     0x00, 0x8000, 0x8000);
> > -     if (rc < 0)
> > -             return rc;
> > -
> > -     /* Check to see if the self-clearing bit is cleared */
> > -     usleep_range(1000, 2000);
> > -     rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
> > -                      PHYACC_ATTR_BANK_SMI, 0x00, 0);
> > +     /* phy Soft reset */
> > +     rc = genphy_soft_reset(phydev);
> >       if (rc < 0)
> >               return rc;
> > -     if ((rc & 0x8000) != 0)
> > -             return -ETIMEDOUT;
> 
> Soft reset.
> 
> > 
> >       /* PHY Initialization */
> >       for (i = 0; i < ARRAY_SIZE(init); i++) {
> > @@ -273,6 +266,9 @@ static int lan87xx_config_init(struct
> > phy_device *phydev)
> >  {
> >       int rc = lan87xx_phy_init(phydev);
> > 
> > +     if (rc < 0)
> > +             phydev_err(phydev, "failed to initialize phy\n");
> > +
> 
> A new error message.
> 
> >       return rc < 0 ? rc : 0;
> >  }
> > 
> > @@ -506,18 +502,14 @@ static int
> > lan87xx_cable_test_get_status(struct phy_device *phydev,
> > 
> >  static struct phy_driver microchip_t1_phy_driver[] = {
> >       {
> > -             .phy_id         = 0x0007c150,
> > -             .phy_id_mask    = 0xfffffff0,
> > -             .name           = "Microchip LAN87xx T1",
> > +             .phy_id         = LAN87XX_PHY_ID,
> > +             .phy_id_mask    = MICROCHIP_PHY_ID_MASK,
> 
> 2nd part of the PHY ID macros.
> 
> > +             .name           = "LAN87xx T1",
> 
> A change in name.
> 
> >               .flags          = PHY_POLL_CABLE_TEST,
> > -
> >               .features       = PHY_BASIC_T1_FEATURES,
> > -
> >               .config_init    = lan87xx_config_init,
> > -
> >               .config_intr    = lan87xx_phy_config_intr,
> >               .handle_interrupt = lan87xx_handle_interrupt,
> > -
> 
> White space changes.
> 
> You can also use PHY_ID_MATCH_MODEL().
> 
>     Andrew
Thanks for the comment. I will keep one change per patch and split this
patch & resend.