[PATCH] arm: apple: t602x: Add missing MMIO regions to memmap

[Janne Grunau]

Hej Mark,

On Thu, Nov 30, 2023, at 21:45, Mark Kettenis wrote:
>> From: Janne Grunau via B4 Relay <devnull+j.jannau.net at kernel.org>
>> Date: Thu, 30 Nov 2023 13:42:22 +0100
>> 
>> From: Janne Grunau <j at jannau.net>
>> 
>> The memory maps for Apple's M2 Pro/Max/Ultra left MMIO space out which
>> was not used by any driver at the time. The display out exposed as
>> simple-framebuffer use a power-domain controlled by a device in an
>> unmapped region.
>> Add a map covering this region as well as another MMIO region in the
>> range 0x4'0000'0000 - 0x5'0000'0000. The added regions cover all MMIO
>> annotated in Apple's device tree in this range.
>> 
>> Signed-off-by: Janne Grunau <j at jannau.net>
>> ---
>>  arch/arm/mach-apple/board.c | 48 +++++++++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 48 insertions(+)
>
> Hi Janne,
>
> Is there a reason why you can't use a SZ_1G mapping for the blocks
> where you're using a SZ_512M mapping?  With SZ_1G the mapping code
> will use a 1G block descriptor which avoids another level of page
> tables.

no reason except that SZ_512M was sufficient to cover all devices in Apple DT.
Shall I resend the patch?

Janne