[PATCH 00/33] ARM: at91: Switch remaining SoCs and boards to CCF

Alexandre Belloni
2014-07-01T16:48:51Z

Hi,

On 01/07/2014 at 18:35:50 +0200, Arnd Bergmann wrote :
> On Tuesday 01 July 2014 16:12:09 Alexandre Belloni wrote:
> Looks good overall, but I think this Kconfig snippet should be cleaned
> up a little now:
>
> config AT91_USE_OLD_CLK
> bool
>
> config AT91_PMC_UNIT
> bool
> default !ARCH_AT91X40
>
> config COMMON_CLK_AT91
> bool
> default AT91_PMC_UNIT && USE_OF && !AT91_USE_OLD_CLK
> select COMMON_CLK
>
> config OLD_CLK_AT91
> bool
> default AT91_PMC_UNIT && AT91_USE_OLD_CLK
>
>
> If I read this right, disabling 'USE_OF' results in still using
> the old clock interface. Is that intentional? If you want to always
> use COMMON_CLK now, the above can probably be simplified to
>
> config AT91_PMC_UNIT
> def_bool !ARCH_AT91X40
> select COMMON_CLK
>
> and all references to AT91_USE_OLD_CLK, COMMON_CLK_AT91 and
> OLD_CLK_AT91 be removed.

Yeah, this is intentional we still have 30 or so boards that we have to
migrate to DT. Until then, we want to be able to boot a kernel without
CCF. The next step in the migration is to switch those boards to DT,
possibly using an hybrid DT/pdata approach until we can get rid of the
board files. Then, we will be able to get rid of the old clk
implementation (and a few other drivers still living in mach-at91).

--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering