Hi Simon,
On Wed, Nov 25, 2015 at 2:50 AM, Simon Horman <horms@xxxxxxxxxxxx> wrote:
> On Mon, Nov 23, 2015 at 02:55:58PM +0100, Geert Uytterhoeven wrote:
>> This patch series add minimal L1 and L2 cache descriptions to DT for
>> r8a7740 and sh73a0, and migrates the shmobile DT-based generic r8a7740
>> platform from calling l2x0_of_init() to the generic l2c OF
>> initialization.
>>
>> Note that the conversion to the generic l2c OF initialization is not
>> done yet for sh73a0, as this initializes the L2 cache earlier, breaking
>> the (fragile) sh73a0 secondary CPU bringup code.
>>
>> Also note that this conversion should be done on r8a7778, and r8a7779,
>> too.
>
> Based on your work I have prepared a DT patch for the r8a7779.
Thanks for following up.
> I don't think that a C patch is necessary, please correct me if I am wrong.
Yes you do!
Without machine_desc.l2x_aux_{val,mask}, the information in DT is not used.
Cfr. arch/arm/mach-shmobile/setup-r8a7740.c
> Regarding the r8a7778: My reading of the documentation is that although a
> pl310 L2 cache controller is present it is not available for use as there
> is no L2 cache memory present. For this reason I do not think any patches
> are required for the r8a7798.
I agree after consulting the datasheet.
>> Dependencies:
>> - This series applies to renesas-devel-20151123-v4.4-rc2,
>> - Patch 3 depends on patch 1,
>> - Patch 4 depends on patch 3.
>>
>> Given C code changesets depending on DT changesets in the same branch
>> are frowned upon, you may want to postpone patches 3 and 4 to v4.6.
>> Of course I'll sleep better if you just apply all 4 of them now ;-)
>
> I have queued up the DT changes for v4.5.
> And tentatively queued up the C changes for v4.6.
Thank you!
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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