[U-Boot] [PATCH] net: phy: marvell: Add functions to read PHY's extended registers

[Lukasz Majewski]

On Thu, 26 Oct 2017 15:05:18 +0000
York Sun <york.sun at nxp.com> wrote:

> On 09/29/2017 07:48 AM, Lukasz Majewski wrote:
> > This commit allows extended Marvell registers to be read with:
> > 
> > foo > mdio rx FEC 3.10
> > Reading from bus FEC
> > PHY at address 0:
> > 3.16 - 0x1063
> > foo > mdio wx FEC 3.10 0x1011
> > 
> > The above code changes the way ETH connector LEDs blink.
> > 
> > Signed-off-by: Lukasz Majewski <lukma at denx.de>
> > ---
> >  drivers/net/phy/marvell.c | 27 +++++++++++++++++++++++++++
> >  1 file changed, 27 insertions(+)
> > 
> > diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
> > index b7f300e..a167c34 100644
> > --- a/drivers/net/phy/marvell.c
> > +++ b/drivers/net/phy/marvell.c
> > @@ -104,6 +104,31 @@
> >  #define MIIM_88E151x_MODE_SGMII		1
> >  #define MIIM_88E151x_RESET_OFFS		15
> >  
> > +static int m88e1xxx_phy_extread(struct phy_device *phydev, int
> > addr,
> > +				int devaddr, int regnum)
> > +{
> > +	int oldpage = phy_read(phydev, MDIO_DEVAD_NONE,
> > MII_MARVELL_PHY_PAGE);
> > +	int val;
> > +
> > +	phy_write(phydev, MDIO_DEVAD_NONE, MII_MARVELL_PHY_PAGE,
> > devaddr);
> > +	val = phy_read(phydev, MDIO_DEVAD_NONE, regnum);
> > +	phy_write(phydev, MDIO_DEVAD_NONE, MII_MARVELL_PHY_PAGE,
> > oldpage); +
> > +	return val;
> > +}
> > +
> > +static int m88e1xxx_phy_extwrite(struct phy_device *phydev, int
> > addr,
> > +				 int devaddr, int regnum, u16 val)
> > +{
> > +	int oldpage = phy_read(phydev, MDIO_DEVAD_NONE,
> > MII_MARVELL_PHY_PAGE); +
> > +	phy_write(phydev, MDIO_DEVAD_NONE, MII_MARVELL_PHY_PAGE,
> > devaddr);
> > +	phy_write(phydev, MDIO_DEVAD_NONE, regnum, val);
> > +	phy_write(phydev, MDIO_DEVAD_NONE, MII_MARVELL_PHY_PAGE,
> > oldpage); +
> > +	return 0;
> > +}
> > +
> >  /* Marvell 88E1011S */
> >  static int m88e1011s_config(struct phy_device *phydev)
> >  {
> > @@ -669,6 +694,8 @@ static struct phy_driver M88E1510_driver = {
> >  	.config = &m88e1510_config,
> >  	.startup = &m88e1011s_startup,
> >  	.shutdown = &genphy_shutdown,
> > +	.readext = &m88e1xxx_phy_extread,
> > +	.writeext = &m88e1xxx_phy_extwrite,
> >  };
> >  
> >  /*
> > 
> 
> 
> I guess this feature is usable. You only enable it for M88E1510. Can
> the same be applied to other Marvell PHYs?

It should work...

However, in this patch I've only enabled one - which I could test.....

I can enable more if you can help me with debugging.

> 
> York




Best regards,

Lukasz Majewski

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