c2f5940db3
DTB Overlays are useful to change/add nodes to a dtb without the need to modify it. Add support for building dtbo during buildkernel. The goal of DTBO present in the FreeBSD source tree is to fill a gap in time when we submit changes upstream (Linux). Instead of waiting 2 to 4 months we can add a DTBO in tree in the meantime. This is not for adding DTBO for capes/hat/addon boards, those will be better to put in a ports. This is also not for enabling a i2c/spi/pwm controller on certain pins, each user have a different use case for those (which pins to use etc ...) and we cannot have all possible configuration. Add a dtbo for sun8i-h3-sid which add the SID node missing in upstream dts. Reviewed by: kevans Differential Revision: https://reviews.freebsd.org/D14782
101 lines
2.8 KiB
Makefile
101 lines
2.8 KiB
Makefile
# $FreeBSD$
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#
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# The include file <dtb.mk> handles building and installing dtb files.
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#
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# +++ variables +++
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#
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# DTC The Device Tree Compiler to use
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#
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# DTS List of the dts files to build and install.
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#
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# DTBDIR Base path for dtb modules [/boot/dtb]
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#
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# DTBOWN .dtb file owner. [${BINOWN}]
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#
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# DTBGRP .dtb file group. [${BINGRP}]
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#
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# DTBMODE Module file mode. [${BINMODE}]
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#
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# DESTDIR The tree where the module gets installed. [not set]
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#
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# +++ targets +++
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#
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# install:
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# install the kernel module; if the Makefile
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# does not itself define the target install, the targets
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# beforeinstall and afterinstall may also be used to cause
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# actions immediately before and after the install target
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# is executed.
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#
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.include <bsd.init.mk>
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# Grab all the options for a kernel build. For backwards compat, we need to
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# do this after bsd.own.mk.
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.include "kern.opts.mk"
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DTC?= dtc
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# Search for kernel source tree in standard places.
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.for _dir in ${.CURDIR}/../.. ${.CURDIR}/../../.. /sys /usr/src/sys
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.if !defined(SYSDIR) && exists(${_dir}/kern/)
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SYSDIR= ${_dir:tA}
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.endif
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.endfor
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.if !defined(SYSDIR) || !exists(${SYSDIR}/kern/)
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.error "can't find kernel source tree"
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.endif
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.SUFFIXES: .dtb .dts .dtbo .dtso
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.PATH: ${SYSDIR}/gnu/dts/${MACHINE} ${SYSDIR}/dts/${MACHINE} ${SYSDIR}/dts/${MACHINE}/overlays
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DTB=${DTS:R:S/$/.dtb/}
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DTBO=${DTSO:R:S/$/.dtbo/}
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all: ${DTB} ${DTBO}
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.if defined(DTS)
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.export DTC
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.for _dts in ${DTS}
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${_dts:R:S/$/.dtb/}: ${_dts} ${OP_META}
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@echo Generating ${.TARGET} from ${_dts}
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@${SYSDIR}/tools/fdt/make_dtb.sh ${SYSDIR} ${_dts} ${.OBJDIR}
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CLEANFILES+=${_dts:R:S/$/.dtb/}
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.endfor
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.endif
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.if defined(DTSO)
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.export DTC
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.for _dtso in ${DTSO}
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${_dtso:R:S/$/.dtbo/}: ${_dtso} ${OP_META}
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@echo Generating ${.TARGET} from ${_dtso}
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@${SYSDIR}/tools/fdt/make_dtbo.sh ${SYSDIR} overlays/${_dtso} ${.OBJDIR}
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CLEANFILES+=${_dtso:R:S/$/.dtbo/}
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.endfor
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.endif
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.if !target(install)
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.if !target(realinstall)
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realinstall: _dtbinstall
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.ORDER: beforeinstall _kmodinstall
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_dtbinstall:
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# Need to create this because installkernel doesn't invoke mtree with BSD.root.mtree
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# to make sure the tree is setup properly. We don't recreate it to avoid duplicate
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# entries in the NO_ROOT case.
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test -d ${DESTDIR}${DTBDIR} || ${INSTALL} -d -o ${DTBOWN} -g ${DTBGRP} ${DESTDIR}${DTBDIR}
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.for _dtb in ${DTB}
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${INSTALL} -o ${DTBOWN} -g ${DTBGRP} -m ${DTBMODE} \
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${_INSTALLFLAGS} ${_dtb} ${DESTDIR}${DTBDIR}/
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.endfor
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test -d ${DESTDIR}${DTBODIR} || ${INSTALL} -d -o ${DTBOWN} -g ${DTBGRP} ${DESTDIR}${DTBODIR}
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.for _dtbo in ${DTBO}
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${INSTALL} -o ${DTBOWN} -g ${DTBGRP} -m ${DTBMODE} \
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${_INSTALLFLAGS} ${_dtbo} ${DESTDIR}${DTBODIR}/
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.endfor
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.endif # !target(realinstall)
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.endif # !target(install)
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.include <bsd.dep.mk>
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.include <bsd.obj.mk>
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.include <bsd.links.mk>
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