[U-Boot] [PATCH V2 5/6] P2571: dts: Add DT files for Tegra210/P2571 board

[Stephen Warren]

On 07/23/2015 11:44 AM, Tom Warren wrote:
> Stephen,
>
>> -----Original Message-----
>> From: Stephen Warren [mailto:swarren at wwwdotorg.org]
>> Sent: Wednesday, July 22, 2015 11:17 AM
>> To: Tom Warren
>> Cc: u-boot at lists.denx.de; Thierry Reding; Stephen Warren;
>> tomcwarren3959 at gmail.com
>> Subject: Re: [U-Boot] [PATCH V2 5/6] P2571: dts: Add DT files for
>> Tegra210/P2571 board
>>
>> On 07/20/2015 01:50 PM, Tom Warren wrote:
>>> Based on T124 Venice2. SDMMC1 is SD-card slot.
>>
>>>    arch/arm/dts/{tegra124.dtsi => tegra210.dtsi}      | 153 ++++-----------------
>>
>> There's also a lot of stuff in that file that isn't used in U-Boot or isn't validated
>> yet (audio, SPI?, PWM, I2C?, APBDMA, PCIe). I'd suggest trimming the DT down
>> to the absolute bare minimum for what U-Boot is using right now. That will help
>> prevent any inconsistencies between the U-Boot and kernel DT files for
>> Tegra210.
 >
> Audio, PCIE make sense. UART and SPI both have DMA properties, so I can' t remove APBDMA. I'll do a cleanup run and see what shakes out.

I believe the DMA properties should be optional in the bindings for UART 
and SPI. So, you should be able to remove the DMA properties from the 
client nodes and hence also the APBDMA node. (Especially given that the 
U-Boot drivers those HW blocks don't do DMA).