From a5587d67f9f8ac5971f073fdfbf4cb0e69fc2bd7 Mon Sep 17 00:00:00 2001
From: imp <imp@FreeBSD.org>
Date: Tue, 2 Jun 2015 21:24:47 +0000
Subject: [PATCH] MFC:

Merge r276846: Add infrastructure to build dtb files from dts files.
---
 share/mk/Makefile              |  1 +
 share/mk/bsd.dtb.mk            | 17 ++++++++
 sys/arm/conf/ATMEL             |  2 +-
 sys/conf/dtb.mk                | 75 ++++++++++++++++++++++++++++++++++
 sys/modules/dtb/atmel/Makefile |  9 ++++
 5 files changed, 103 insertions(+), 1 deletion(-)
 create mode 100644 share/mk/bsd.dtb.mk
 create mode 100644 sys/conf/dtb.mk
 create mode 100644 sys/modules/dtb/atmel/Makefile

diff --git a/share/mk/Makefile b/share/mk/Makefile
index 75b45e8d36b..d0234d8c1d4 100644
--- a/share/mk/Makefile
+++ b/share/mk/Makefile
@@ -11,6 +11,7 @@ FILES=	\
 	bsd.crunchgen.mk \
 	bsd.dep.mk \
 	bsd.doc.mk \
+	bsd.dtb.mk \
 	bsd.endian.mk \
 	bsd.files.mk \
 	bsd.incs.mk \
diff --git a/share/mk/bsd.dtb.mk b/share/mk/bsd.dtb.mk
new file mode 100644
index 00000000000..24e6930f8fe
--- /dev/null
+++ b/share/mk/bsd.dtb.mk
@@ -0,0 +1,17 @@
+# $FreeBSD$
+
+# Search for kernel source tree in standard places.
+.for _dir in ${.CURDIR}/../.. ${.CURDIR}/../../.. ${.CURDIR}/../../../.. \
+    ${.CURDIR}/../../../../.. /sys /usr/src/sys
+.if !defined(SYSDIR) && exists(${_dir}/kern/) && exists(${_dir}/conf/kmod.mk)
+SYSDIR=	${_dir}
+.endif
+.endfor
+.if !defined(SYSDIR) || !exists(${SYSDIR}/kern/) || \
+    !exists(${SYSDIR}/conf/kmod.mk)
+.error Unable to locate the kernel source tree. Set SYSDIR to override.
+.endif
+
+.include "${SYSDIR}/conf/dtb.mk"
+
+.include <bsd.sys.mk>
diff --git a/sys/arm/conf/ATMEL b/sys/arm/conf/ATMEL
index 59ef417e36c..04b8367402b 100644
--- a/sys/arm/conf/ATMEL
+++ b/sys/arm/conf/ATMEL
@@ -15,7 +15,7 @@ makeoptions	KERNVIRTADDR=0xc0000000
 options 	KERNPHYSADDR=0x20000000
 options 	KERNVIRTADDR=0xc0000000
 
-makeoptions	MODULES_OVERRIDE=""
+makeoptions	MODULES_OVERRIDE="dtb/atmel"
 
 # list all boards here, but not just yet (no multiboard in mainline).
 options 	ARM_MANY_BOARD
diff --git a/sys/conf/dtb.mk b/sys/conf/dtb.mk
new file mode 100644
index 00000000000..9822f46c2ab
--- /dev/null
+++ b/sys/conf/dtb.mk
@@ -0,0 +1,75 @@
+# $FreeBSD$
+#
+# The include file <dtb.mk> handles building and installing dtb files.
+#
+# +++ variables +++
+#
+# DTS		List of the dts files to build and install.
+#
+# DTBDIR	Base path for dtb modules [/boot/dtb]
+#
+# DTBOWN	.dtb file owner. [${BINOWN}]
+#
+# DTBGRP	.dtb file group. [${BINGRP}]
+#
+# DTBMODE	Module file mode. [${BINMODE}]
+#
+# DESTDIR	The tree where the module gets installed. [not set]
+#
+# +++ targets +++
+#
+# 	install:
+#               install the kernel module; if the Makefile
+#               does not itself define the target install, the targets
+#               beforeinstall and afterinstall may also be used to cause
+#               actions immediately before and after the install target
+#		is executed.
+#
+
+.include <bsd.init.mk>
+# Grab all the options for a kernel build. For backwards compat, we need to
+# do this after bsd.own.mk.
+#.include "kern.opts.mk" # commented out to minize difference with 11.x and newer
+
+# Search for kernel source tree in standard places.
+.for _dir in ${.CURDIR}/../.. ${.CURDIR}/../../.. /sys /usr/src/sys
+.if !defined(SYSDIR) && exists(${_dir}/kern/)
+SYSDIR=	${_dir}
+.endif
+.endfor
+.if !defined(SYSDIR) || !exists(${SYSDIR}/kern/)
+.error "can't find kernel source tree"
+.endif
+
+.SUFFIXES: .dtb .dts
+
+.PATH: ${SYSDIR}/gnu/dts/${MACHINE} ${SYSDIR}/boot/fdt/dts/${MACHINE}
+
+DTBDIR?=/boot/dtb
+DTB=${DTS:R:S/$/.dtb/}
+
+all: ${DTB}
+
+.if defined(DTS)
+.for _dts in ${DTS}
+${_dts:R:S/$/.dtb/}:	${_dts}
+	@echo Generating ${.TARGET} from ${_dts}
+	@${SYSDIR}/tools/fdt/make_dtb.sh ${SYSDIR} ${_dts} ${.OBJDIR}
+CLEANFILES+=${_dts:R:S/$/.dtb/}
+.endfor
+.endif
+
+.if !target(install)
+.if !target(realinstall)
+realinstall: _dtbinstall
+.ORDER: beforeinstall _kmodinstall
+_dtbinstall:
+.for _dtb in ${DTB}
+	${INSTALL} -o ${DTBOWN} -g ${DTBGRP} -m ${DTBMODE} \
+	    ${_INSTALLFLAGS} ${_dtb} ${DESTDIR}${DTBDIR}
+.endfor
+.endif # !target(realinstall)
+.endif # !target(install)
+
+.include <bsd.dep.mk>
+.include <bsd.obj.mk>
diff --git a/sys/modules/dtb/atmel/Makefile b/sys/modules/dtb/atmel/Makefile
new file mode 100644
index 00000000000..99ae4cb1f98
--- /dev/null
+++ b/sys/modules/dtb/atmel/Makefile
@@ -0,0 +1,9 @@
+# $FreeBSD$
+# All the dts files for the boards we might likely support made by Atmel,
+# plus the SAMA5 offerings.
+DTS=at91-sama5d3_xplained.dts at91sam9g20ek.dts ethernut5.dts \
+	at91-qil_a9260.dts sama5d31ek.dts sama5d33ek.dts  sama5d34ek.dts \
+	sama5d35ek.dts sama5d36ek.dts tny_a9260.dts tny_a9g20.dts \
+	usb_a9260.dts usb_a9g20.dts
+
+.include <bsd.dtb.mk>
-- 
2.45.2