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From: Petr Kulhavy <petr@barix•com>
To: Andrew Lunn <andrew@lunn•ch>
Cc: netdev@vger•kernel.org
Subject: Re: davinci-mdio: failing to connect to PHY
Date: Mon, 4 Apr 2016 15:50:02 +0200	[thread overview]
Message-ID: <5702710A.5010804@barix.com> (raw)
In-Reply-To: <20160404123145.GE21828@lunn.ch>



On 04.04.2016 14:31, Andrew Lunn wrote:
>   
> Hi Petr
>
> You might want to take a look at:
>
> http://lxr.free-electrons.com/source/drivers/net/ethernet/ti/davinci_mdio.c#L137
>
> It seems to be asking the hardware about the phy mask.
>
>     Andrew

Hi Andrew,

thanks a lot for the link. In the meantime I've understood the issue 
better. It is due to the fact that the PHY is pin-strapped to address 1 
and broadcast (at address 0) is  enabled. The Micrel driver's 
config_init() disables the broadcast and the PHY stops responding, which 
causes the troubles. The kernel 3.17 didn't disable the broadcast and 
therefore it worked.

I'm wondering how to solve or workaround this...

Petr

next prev parent reply	other threads:[~2016-04-04 13:50 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-04  8:18 davinci-mdio: failing to connect to PHY Petr Kulhavy
2016-04-04 12:31 ` Andrew Lunn
2016-04-04 13:50   ` Petr Kulhavy [this message]
2016-04-04 13:58     ` Andrew Lunn
2016-04-04 14:01       ` Petr Kulhavy
  -- strict thread matches above, loose matches on Subject: below --
2016-04-01 15:24 Petr Kulhavy

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