Date: Sun, 31 May 2015 01:12:03 -0600 From: Warner Losh <imp@bsdimp.com> To: Jeroen Hofstee <linux-arm@myspectrum.nl> Cc: Yann Droneaud <ydroneaud@opteya.com>, Rob Herring <robherring2@gmail.com>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, freebsd-arm@freebsd.org, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org> Subject: Re: Device Tree Blob (DTB) licence Message-ID: <8F98C0FD-D60D-46CB-A42D-10690A097573@bsdimp.com> In-Reply-To: <556A169E.8030909@myspectrum.nl> References: <1430820315.19516.26.camel@opteya.com> <CAL_Jsq%2BT5c7qornpRVCduEjUSCeM%2B0xqbtVYovtH76y=4BqhLQ@mail.gmail.com> <1432289148.5304.58.camel@opteya.com> <556A169E.8030909@myspectrum.nl>
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[-- Attachment #1 --] > On May 30, 2015, at 1:59 PM, Jeroen Hofstee <linux-arm@myspectrum.nl> wrote: > > Hi, > > On 22-05-15 12:05, Yann Droneaud wrote: >> Le mardi 05 mai 2015 à 11:41 -0500, Rob Herring a écrit : >>> On Tue, May 5, 2015 at 5:05 AM, Yann Droneaud <ydroneaud@opteya.com> >>> wrote: >>>> I believe Device Tree Blob (.dtb file) built from kernel's Device >>>> Tree >>>> Sources (.dts, which #include .dtsi, which #include .h) using >>>> Device >>>> Tree Compiler (dtc) are covered by GNU General Public Licence v2 >>>> (GPLv2), but cannot find any reference. >>> By default yes, but we've been steering people to dual license them >>> GPL/BSD. >>> >> > > obviously these files should be reusable. If there is a license issue > with that it should be fixed. cc-ing freebsd-arm@freebsd.org. FreeBSD segregates the files that its contributors have written and are under BSDL from those that are received from upstream and may be under BSDL+GPL or just GPL in its source tree. The source is shipped, the binaries are not, at least by the FreeBSD project. The FreeBSD project used to create its own custom dts files that were incompatible with anything except FreeBSD. However, apart from a few stragglers, we’ve converted all our supported platforms to using the ‘vendor supplied’ dts files, which means we follow the documented conventions found in Linux, as well as many of the strange Linuxisms that seep into this or that .dts file. Following the standard here and accepting some potentially GPLd code into the tree given its limited scope and already segregated nature. It is an open question to what extent the mere-aggregation clause would apply to the typical use of placing the dtb into a filesystem that u-boot then passes along applies. And if that same reasoning applies to a binary bundle containing both the kernel and the dtb file. It’s also an open question the extent to which copyright applies to the dts files since they are, in theory at least, just an expression of facts and there’s generally only one way to correctly express those facts in a dts file. The GPL’d files aren’t stopping anybody from creating proprietary software. People that really care will rewrite the files from scratch anyway. People that don’t care.. well, one need look no further than the difficulty of getting source code to different SoC support packages for the kernel in the Android world to see how much some people care about GPL compliance and how much it really stops them from doing what they want. Than again, I’m not a lawyer, and this isn’t legal advice. Warner [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJVarREAAoJEGwc0Sh9sBEAKL4P/1YbK+3LRuBImjlERUmmqYOY DXKAJxwINF/VkjUo3Z+/T92G+41N32f+fa2LpWsD/trRYnG1xBTnHVULBLNQsOtw gz6YSietcdzSx6xyHqtD4AzdROWh1NYzjhA/dxm3l0/YeLx3g2XuRMqWaYN0NPG/ 7UlMraYOCaGhU4DaoiDcMj7hVrNwIrbLDLMrItfb+Jq7MIdi+H0GIaNtQy2mvUZv 8DU6ycB8isCZSoUIIRfdfmiLdFhQNYUInGWjcgw8s7zPPo/703Vegf0wtRqZ1JcS PUIt56tauJoJlPkckCR12WciWnfsz7EHGEYLTsuV7fiMixOkRJH1eY1VaI9zSYU+ i0qWZSF1GGZEXEdVpKwbqCBgJiGhnyaFz7plKcmudXUiXbWAkPkrxV7CIPQb7xHs ZLe6rP3wVOE+yad+69k8WhznQjWoszUNPwnm82jwIJy3LF8Ew6rGSOpxvVZgnLbl juf7ee8Q5N683kUy9scyR1EY+NyyHu2NApeFnOpuD2w5CBY/b6eOqWwpDTgF0qn5 GctT0WfY9vfkG2YPudhZMQbhaoVgFMwmfKzevly1ymXYAwwmm2CtYklVX1JlQD4u CqkfaGnEVHsteQOsYII1KtfQT9be58ZzpFmh2gnNlhgL/Q2xl1fEdNhmeX9jMjvv Hv+Hq31kimjlzH6B6hD2 =etBv -----END PGP SIGNATURE-----help
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