netdev - Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

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Date:	Tue, 5 Nov 2013 16:16:08 -0800
From:	Florian Fainelli <f.fainelli@...il.com>
To:	Alistair Popple <alistair@...ple.id.au>
Cc:	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	"David S. Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM
 emac driver

2013/11/5 Alistair Popple <alistair@...ple.id.au>:
> On Tue, 5 Nov 2013 10:47:22 Florian Fainelli wrote:
>> [snip]
>>
>> > +/* RGMII bridge supports only GMII/TBI and RGMII/RTBI PHYs */
>> > +static inline int rgmii_valid_mode(int phy_mode)
>> > +{
>> > +       return  phy_mode == PHY_MODE_GMII ||
>> > +               phy_mode == PHY_MODE_MII ||
>> > +               phy_mode == PHY_MODE_RGMII ||
>> > +               phy_mode == PHY_MODE_TBI ||
>> > +               phy_mode == PHY_MODE_RTBI;
>> > +}
>> > +
>> > +static inline const char *rgmii_mode_name(int mode)
>> > +{
>> > +       switch (mode) {
>> > +       case PHY_MODE_RGMII:
>> > +               return "RGMII";
>> > +       case PHY_MODE_TBI:
>> > +               return "TBI";
>> > +       case PHY_MODE_GMII:
>> > +               return "GMII";
>> > +       case PHY_MODE_MII:
>> > +               return "MII";
>> > +       case PHY_MODE_RTBI:
>> > +               return "RTBI";
>> > +       default:
>> > +               BUG();
>> > +       }
>>
>> Any reasons why you are duplicating what is available in
>> drivers/of/of_net.c ::of_get_phy_mode()?
>
> Unless I'm missing something of_get_phy_mode() is going the other way.
> rgmii_mode_name() is converting PHY_MODE_* into a human-readable string. I
> couldn't find any obvious kernel method to do this but maybe I missed it?

Right, rgmii_mode_name() just has informative purposes and should be
removed, I would suggest using standard device tree bindings property
(phy-mode) anyway such that you could use of_get_phy_mode() and use
phy_interface_t types.
-- 
Florian
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