[v2 4/4] sata: imx: add ahci sata support on imx platforms

[Tejun Heo]

On Mon, Jul 01, 2013 at 06:02:55PM +0800, Richard Zhu wrote:
> imx6q contains one Synopsys AHCI SATA controller,
> But it can't shares ahci_platform driver with other
> controllers.
> Because there are some misalignments of the bits
> definitions of the HBA registers and the Vendor
> Specific registers
>  - CAP_SSS(bit20) of the HOST_CAP is writable, default
>  value is '0', should be configured to be '1'
>  - bit0 (only one AHCI SATA port on imx6q) of the
>  HOST_PORTS_IMPL should be set to be '1'.(default 0)
>  - One Vendor Specific register HOST_TIMER1MS(offset:0xe0)
>  should be configured regarding to the frequency of AHB
>  bus clock.

If these are the only differences, can't you make ahci_platform deal
with different variants?  That's how we deal with subtly different
variants of about the same controllers.

Thanks.

-- 
tejun