[U-Boot] [PATCH 2/5] net: phy: micrel: Separate KSZ9000 drivers from KSZ8000 drivers

[Tom Rini <trini@konsulko.com>]

On Fri, Jul 07, 2017 at 10:13:09PM +0200, Marek Vasut wrote:
> On 07/07/2017 08:36 PM, Alexandru Gagniuc wrote:
> > The KS8721BL and KSZ9021 PHYs are software-incompatible, yet they
> > share the same ID. Drivers for bothe PHYs cannot safely coexist, so
> > the solution was to use #ifdefs to select between the two drivers.
> > 
> > As a result KSZ9031, which has a unique ID, is now caught in the
> > crossfire. Unless CONFIG_PHY_MICREL_KSZ9031 is defined, the KSZ9031
> > will not function properly, as some essential configuration code is
> > ifdef'd-out.
> > 
> > To prevent such situations, move the KSZ9000 drivers to a separate
> > file, and place them under a separate Kconfig option. While it is
> > possible to enable both KSZ8000 and KSZ9000 drivers at the same time,
> > the assumption is that it is highly unlikely for a system to contain
> > both a KSZ8000 and a KSZ9000 PHY, and that only one of the drivers
> > will be enabled at any given time.
> > 
> > Signed-off-by: Alexandru Gagniuc <alex.g@adaptrum.com>
> 
> The solution would be to either specify the PHY type in DT or platform
> data. This shuffling of ifdefs is IMO pointless.

That sounds like a good long term solution since we can't do things like
that until phylib is DMified.

-- 
Tom
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