Date: Sun, 2 Mar 2014 09:30:07 -0700 From: Warner Losh <imp@bsdimp.com> To: Ian Lepore <ian@FreeBSD.org> Cc: Tim Kientzle <tim@kientzle.com>, freebsd-arm <freebsd-arm@FreeBSD.org> Subject: Re: A unified imx6 kernel config, old WANDBOARD-* configs going away Message-ID: <9BF14340-2267-473E-B047-E377AA258713@bsdimp.com> In-Reply-To: <1393731762.1149.233.camel@revolution.hippie.lan> References: <1393594966.1149.161.camel@revolution.hippie.lan> <F38D0A2F-D2AF-426D-8515-BD111501B2A2@kientzle.com> <CAB3ij4Dd1jq-_v7LVZ75skA3tZVOb=03vJ5JkSCb-7FL8FMrLg@mail.gmail.com> <1393731762.1149.233.camel@revolution.hippie.lan>
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On Mar 1, 2014, at 8:42 PM, Ian Lepore <ian@FreeBSD.org> wrote: > On Sat, 2014-03-01 at 18:01 -0700, Tom Everett wrote: >> I'm looking at the crochet code, and I see in freebsd_install_fdt = that both >> *.dtb and *.dts are supported. However on the source tree it's = imx6.dtsi. >> What's the difference b/t a dts file and a dtsi file? >=20 > A .dtsi file is an include file used by .dts files. A .dtb is the > binary (compiled) form used by the kernel. >=20 > So there are several wandboard-something.dts files, each of which > includes imx6.dtsi where all the common parts live. For a new imx6 > device, a new board-named file similar to one of the wandboard files = is > necessary, and it would also include imx6.dtsi. As would other boards that use the imx6 SoC. They=92d have their own = .dts file that included the imx6.dsti and customized it for how they are = wired together. > We're pushing hard towards just using the standard dtb files from > vendors, but we've got a bit of work to do before we're there. I have some rough changes that allow us to build N different DTBs as = part of the kernel build, but not glom them into the kernel. Not strictly = required for this, but helpful. I=92m planning on having Atmel use 100% vendor supplied files as well. It is a very good goal. There=92s also efforts on the linux side to = separate out the device-trees from the linux kernel, which is where I grabbed the = recent /vendor/device-tree stuff from. Warner
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