Hi, On 19/03/2015 04:29, Frank Rowand wrote: > Rob, > > Can this be added to the next trees to get some test exposure before submitting > to Linus? > > There is currently no way to tie a device tree blob (DTB) back to the source > and environment used to create it. Add this information, including a DTB > version number, which is somewhat analogous to the Linux kernel version number. > > The DTB version number is independent of the kernel version number, and is > incremented for each make of one or more DTBs. > > The DTB information is placed in node /chosen/dtb-info. The data for this > node will be automatically generated by the .dtb make system for any .dts > that includes arch/arm/boot/dts/skeleton.dtsi, either directly or indirectly. > This means that architectures other than arm will not receive this feature. > This can be added to other architectures by modifying their skeleton.dtsi. > > There are 70 of the 557 arm .dts files that do not include skeleton.dtsi. > Thus the .dtb files created for these systems will not have the > /chosen/dtb-info node: About the following list some of them use skeleton64.dtsi instead of skeleton.dtsi. All the armada-xp-*.dts uses it and also axm5516-amarillo.dts (through axm55xx.dtsi), the ls1021a-*.dts, the mt8127-moose.dts, the mt8135-evbp1.dts and the sun9i-a80-optimus.dts. So maybe it would worth updating skeleton64.dtsi. For the other ones it seems that actually they use skeleton.dtsi but not through a dtsi file. Thanks, Gregory > > armada-xp-axpwifiap.dts > armada-xp-db.dts > armada-xp-gp.dts > armada-xp-lenovo-ix4-300d.dts > armada-xp-matrix.dts > armada-xp-netgear-rn2120.dts > armada-xp-openblocks-ax3-4.dts > armada-xp-synology-ds414.dts > atlas6-evb.dts > atlas7-evb.dts > axm5516-amarillo.dts > bcm2835-rpi-b-plus.dts > bcm2835-rpi-b.dts > ea3250.dts > ecx-2000.dts > highbank.dts > hip04-d01.dts > integratorap.dts > integratorcp.dts > ls1021a-qds.dts > ls1021a-twr.dts > meson6-atv1200.dts > moxart-uc7112lx.dts > mt8127-moose.dts > mt8135-evbp1.dts > nspire-clp.dts > nspire-cx.dts > nspire-tp.dts > phy3250.dts > picoxcell-pc7302-pc3x2.dts > picoxcell-pc7302-pc3x3.dts > prima2-evb.dts > r7s72100-genmai.dts > r8a73a4-ape6evm-reference.dts > r8a73a4-ape6evm.dts > r8a7790-lager.dts > r8a7791-henninger.dts > r8a7791-koelsch.dts > r8a7794-alt.dts > spear1310-evb.dts > spear1340-evb.dts > spear300-evb.dts > spear310-evb.dts > spear320-evb.dts > spear320-hmi.dts > spear600-evb.dts > stih407-b2120.dts > stih410-b2120.dts > stih415-b2000.dts > stih415-b2020.dts > stih416-b2000.dts > stih416-b2020.dts > stih416-b2020e.dts > stih418-b2199.dts > sun9i-a80-optimus.dts > vexpress-v2p-ca15-tc1.dts > vexpress-v2p-ca15_a7.dts > vexpress-v2p-ca5s.dts > vexpress-v2p-ca9.dts > vt8500-bv07.dts > wm8505-ref.dts > wm8650-mid.dts > wm8750-apc8750.dts > wm8850-w70v2.dts > xenvm-4.2.dts > zynq-parallella.dts > zynq-zc702.dts > zynq-zc706.dts > zynq-zed.dts > zynq-zybo.dts > > > > An example of the DTB information reported is: > > $ echo ; cat /proc/version; echo ; echo ; dmesg | grep DTB > > Linux version 4.0.0-rc4-dirty (frank@buildhost) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #5 SMP PREEMPT Wed Mar 18 20:04:48 PDT 2015 > > > DTB version 4.0.0-rc4-dirty (frank@buildhost) (DTC 1.4.0-dirty) #4 Wed Mar 18 20:04:11 PDT 2015 > DTB linux version 4.0.0-rc4-dirty (frank@build_host) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #3 SMP PREEMPT Wed Mar 18 20:02:46 PDT 2015 > DTB source /local/nobackup/src/git_linus/linux--4.0/arch/arm/boot/dts/qcom-apq8074-dragonboard.dts > DTB blob arch/arm/boot/dts/qcom-apq8074-dragonboard.dtb > > > The values of the /chosen/dtb-info/ properties are also available in > /proc/device-tree/chosen/dtb-info/ > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
