[PATCH] cmd_dtc: Enable generation of device tree symbols

[Frank Rowand]

+frank

On 1/25/21 5:15 AM, Cyril Brulebois wrote:
> Hi,
> 
> Uwe Kleine-König <uwe at kleine-koenig.org> (2021-01-25):
>> Adding the -@ switch to dtc results in the binary devicetrees containing
>> a list of symbolic references and their paths. This is necessary to
>> apply device tree overlays e.g. on Raspberry Pi as described on
>> https://www.raspberrypi.org/documentation/configuration/device-tree.md.
>>
>> Obviously the downside of this change is an increas of the size of the
> 
> (as spotted by Uwe right after sending →) increase
> 
>> generated dtbs, for an arm out-of-tree build (multi_v7_defconfig):
>>
>> 	$ du -s arch/arm/boot/dts*
>> 	101380	arch/arm/boot/dts-pre
>> 	114308	arch/arm/boot/dts-post
>>
>> so this is in average an increase of 12.8% in size.
>>
>> Signed-off-by: Uwe Kleine-König <uwe at kleine-koenig.org>
> 
> Tested-by: Cyril Brulebois <cyril at debamax.com>
> 
> with:
>  - a Raspberry Pi CM3
>  - a carrier board designed after the official IO Board V3
>  - an RTC accessible over I²C, made functional via a DTB overlay, that
>    can only be enabled once bcm2710-rpi-cm3.dtb has been generated with
>    this patch applied.
> 
> 
> Cheers,
> 
> 
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