Re: [PATCH] arm64: dts: renesas: Add /soc dma-ranges

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On 9/9/19 10:19 AM, Geert Uytterhoeven wrote:
> Hi Marek,

Hi,

> On Sat, Sep 7, 2019 at 6:16 PM <marek.vasut@xxxxxxxxx> wrote:
>> From: Marek Vasut <marek.vasut+renesas@xxxxxxxxx>
>>
>> Add dma-ranges property into /soc node to describe the DMA capabilities
>> of the bus. This is currently needed to translate PCI DMA ranges, which
>> are limited to 32bit addresses.
>>
>> Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxx>
> 
> Thanks for your patch!
> 
>> NOTE: This is needed for the following patches to work correctly:
>>       https://patchwork.ozlabs.org/patch/1144870/
>>       https://patchwork.ozlabs.org/patch/1144871/
> 
> What happens with the above patches applied, and without this one?

It triggers https://patchwork.kernel.org/patch/11087391/#22811745

> As PCI/OF driver patches go in through different trees, is it safe to apply
> this patch now?
> Should they go in together?

I didn't get any feedback on the other two patches, but this one here is
safe to go in either way.

>>  arch/arm64/boot/dts/renesas/r8a7795.dtsi  | 1 +
>>  arch/arm64/boot/dts/renesas/r8a7796.dtsi  | 1 +
>>  arch/arm64/boot/dts/renesas/r8a77965.dtsi | 1 +
> 
> Do we need similar patches for the other R-Car Gen3 and RZ/G2 DTS files?
> What about R-Car Gen2 and RZ/G1?
I suspect we need such patches for any ARM64 machine with PCIe with this
32bit limitation.

-- 
Best regards,
Marek Vasut



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