Dove clock support

[Andrew Lunn]

On Tue, Jun 19, 2012 at 12:10:16AM +0200, Sebastian Hesselbarh wrote:
> On 06/18/2012 11:41 PM, Simon Baatz wrote:
> >This is not potentially a problem, this is definitively a problem (on kirkwood):
> >
> >[   12.280783] sata_mv sata_mv.0: cannot get optional clkdev
> >[   12.286314] sata_mv sata_mv.0: slots 32 ports 2
> >...
> >[   12.665882] ata1: SATA link down (SStatus 0 SControl F300)
> >[   13.015881] ata2: SATA link down (SStatus 0 SControl F300)
> 
> Is this because of some bug in kirkwood soc or missing code in
> sata_mv.c?
> 
> According to the functional specification of kirkwood there is a
> PhyShutdown bit in it's registers. Dove also has this register bit.
> 
> Up to now it looks like the SATA PHY can only be disabled in code,
> but there should be an phy_enable, too.

Correct.

When moving from kirkwoods old clock management to the generic clock
framework, i kept the functionality the same. The old code would turn
the PHYs off, but have no way to turn them back on again. The new code
is the same.

	Andrew