[U-Boot] [PATCH] Revert "sunxi: dram: Use divisor P=1 for PLL5"

[Hans de Goede]

Hi,

On 10/22/2014 11:19 AM, Ian Campbell wrote:
> On Wed, 2014-10-22 at 10:35 +0200, Hans de Goede wrote:
>> Hi,
>>
>> On 10/22/2014 10:14 AM, Ian Campbell wrote:
>>> On Tue, 2014-10-21 at 16:58 -0400, Tom Rini wrote:
>>>> We should be doing things right, in mainline.  To bring up a different
>>>> example, on TI OMAP4 parts at least for a long time in order to use
>>>> mainline U-Boot on older kernels you had to manually add
>>>> CONFIG_SOMETHING_OR_ANOTHER to enable additional clocks/mux that the old
>>>> kernels had incorrectly relied on U-Boot to set.  If we must do strange
>>>> things to support old and incorrect but in the wild kernels we need to
>>>> (a) make it opt-in (easier now with Kconfig!) and (b) schedule a removal
>>>> of the hack all the same.
>>>
>>> A Kconfig option does sound like a reasonable compromise.
>>
>> Ok, I will look into this, my plan for now is to call it OLD_KERNEL_COMPAT,
>> so that if we come across more cases like this we've one config option for
>> them, rather then a ton of small isolated config options.
> 
> Is it particular to "old" kernels as such, or is it more to do with
> Allwinner SDK (and derived) kernels? Is it worth trying to keep
> workarounds for such kernels separated from workarounds for old mainline
> kernels?

AFAIK the first mainline kernels with sunxi support are recent enough that they
don't need any workarounds. TBH I don't think differentiating between the 2
brings us anything.

Regards,

Hans