Re: [PATCH 06/12] arm64: dts: zynqmp: Add label for zynqmp_ipi

[Michal Simek]

On 06. 12. 20 23:48, Laurent Pinchart wrote:
> On Mon, Dec 07, 2020 at 12:46:56AM +0200, Laurent Pinchart wrote:
>> Hi Michal,
>>
>> Thank you for the patch.
>>
>> On Wed, Dec 02, 2020 at 03:06:05PM +0100, Michal Simek wrote:
>>> Add label which is used by bootloader for adding bootloader specific flag.
>>>
>>> Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx>
>>> ---
>>>
>>> U-Boot needs to add u-boot,dm-pre-reloc; property
>>
>> I'm not entirely sure what best practice rules are in this area, but
>> shouldn't U-Boot locate the node by name instead of label ?
> 
> And regardless of what mechanism is used, it should be documented in the
> bindings.

I don't think we should be documenting labels because names can be
whatever. DT binding spec is just talking about name rules.

6.2 chapter.

A label shall be between - 1 to 31 characters in length, be composed
only of the characters in the set Table 6.1, and must not start with a
number.

- Table 6.1: Valid characters for DTS labels
Character	Description
0-9		digit
a-z		lowercase letter
A-Z		uppercase letter
_		underscore

Thanks,
Michal