Re: dtc fails to compile <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>

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On Mon, Apr 3, 2017 at 6:25 AM, Waldemar Rymarkiewicz
<waldemar.rymarkiewicz@xxxxxxxxx> wrote:
> On 31 March 2017 at 18:31, Rob Herring <robh@xxxxxxxxxx> wrote:
>> On Fri, Mar 31, 2017 at 3:25 AM, Waldemar Rymarkiewicz
>> <waldemar.rymarkiewicz@xxxxxxxxx> wrote:
>>> On 30 March 2017 at 17:39, Rob Herring <robh@xxxxxxxxxx> wrote:
>>>> On Thu, Mar 30, 2017 at 4:20 AM, Waldemar Rymarkiewicz
>>>> <waldemar.rymarkiewicz@xxxxxxxxx> wrote:
>>>>> Hi,
>>>>>
>>>>> I build DT for thermal zone according to
>>>>>
>>>>> http://lxr.free-electrons.com/source/Documentation/devicetree/bindings/thermal/thermal.txt#L261
>>>>>
>>>>> but dtc (DTC 1.4.1-g53bf130b) fails with syntax error.
>>>>>
>>>>>     Error: ../dts/xrx500.dtsi:1060.14-15 syntax error
>>>>>     FATAL ERROR: Unable to parse input tree
>>>>>
>>>>> The problem is with cooling-device property
>>>>>
>>>>>       cooling-maps {
>>>>> 295                         map0 {
>>>>> 296                                 trip = <&cpu_alert0>;
>>>>> 297                                 cooling-device =
>>>>> 298                                     <&cpu0 THERMAL_NO_LIMIT
>>>>> THERMAL_NO_LIMIT>;
>>>>> 299                         };
>>>>> 300                 };
>>>>>
>>>>> if I use phandle like <&cpu0> it compiles but  <&cpu0 THERMAL_NO_LIMIT
>>>>> THERMAL_NO_LIMIT>; fails.
>>>>>
>>>>> What could be a reason? any hint ?
>>>>
>>>> Did you run it thru the C preprocessor first? Simple #defines are
>>>> supported in dts files, but you have to use the C preprocessor before
>>>> passing to dtc. The builds of dts files in the kernel tree do this for
>>>> you.
>>>
>>> Yes,  but preprocessor does not resolve  THERMAL_NO_LIMIT which is
>>> located in include/linux/thermal.h as far as I can see.
>>
>> That's by design. dts files should only include include/dt-bindings/*
>> as they are part of the ABI.
>
> So, why does dtc fails on  THERMAL_NO_LIMIT if this is defined in
> include/dt-bindings/thermal/thermal.h?

It is and there are there are lots of users in the tree that all
compile. Maybe something mips specific is not picking up the include
path?

Rob
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