From: Frank Rowand <frowand.list@gmail.com>
To: "Cyril Brulebois" <cyril@debamax.com>,
"Uwe Kleine-König" <uwe@kleine-koenig.org>,
"Frank Rowand" <frowand.list@gmail.com>
Cc: Michal Marek <michal.lkml@markovi.net>,
Arnd Bergmann <arnd@arndb.de>,
linux-kbuild@vger.kernel.org,
Masahiro Yamada <masahiroy@kernel.org>,
linux-kernel@vger.kernel.org, Maxime Ripard <mripard@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] cmd_dtc: Enable generation of device tree symbols
Date: Tue, 26 Jan 2021 12:01:55 -0600 [thread overview]
Message-ID: <e7e0751f-991f-baa5-0c76-598542d5fdd5@gmail.com> (raw)
In-Reply-To: <20210125111520.mgqe7u7fh5425ywl@debamax.com>
+frank
On 1/25/21 5:15 AM, Cyril Brulebois wrote:
> Hi,
>
> Uwe Kleine-König <uwe@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@kleine-koenig.org>
>
> Tested-by: Cyril Brulebois <cyril@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,
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
next prev parent reply other threads:[~2021-01-26 18:18 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-25 10:57 [PATCH] cmd_dtc: Enable generation of device tree symbols Uwe Kleine-König
2021-01-25 11:15 ` Cyril Brulebois
2021-01-26 18:01 ` Frank Rowand [this message]
2021-01-25 21:53 ` Masahiro Yamada
2021-01-26 7:20 ` Uwe Kleine-König
2021-01-26 8:43 ` Geert Uytterhoeven
2021-01-26 18:03 ` Frank Rowand
2021-01-26 13:42 ` Rob Herring
2021-01-26 18:03 ` Frank Rowand
2021-01-26 18:26 ` Frank Rowand
2021-01-26 18:02 ` Frank Rowand
2021-01-26 18:01 ` Frank Rowand
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