From 4f5efcb39b25a2a9c24c36c467e7f14ce6e818a5 Mon Sep 17 00:00:00 2001
From: John Klug <john.klug@multitech.com>
Date: Fri, 10 May 2019 17:10:10 -0500
Subject: Device Tree Overlay Example

---
 Makefile | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 Makefile

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..5679f26
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,26 @@
+CC?=$(CROSS_COMPILE)gcc
+DTC_OPTIONS?=-@
+DTC_OPTIONS += -Wno-unit_address_vs_reg -Wno-graph_child_address -Wno-pwms_property
+KERNEL_DIR?=../linux
+KERNEL_BUILD_DIR?=$(KERNEL_DIR)
+# Need a dtc new enough to handle the DTC options.
+DTC?=/usr/bin/dtc
+
+MTCDT_DTBO_OBJECTS:= $(patsubst %.dtso,%.dtbo,$(wildcard mtcdt/*.dtso))
+MTRV1_DTBO_OBJECTS:= $(patsubst %.dtso,%.dtbo,$(wildcard mtrv1/*.dtso))
+
+%.pre.dtso: %.dtso
+	$(CC) -E -nostdinc -I$(KERNEL_DIR)/include -I$(KERNEL_DIR)/arch/arm/boot/dts -x assembler-with-cpp -undef -o $@ $^
+
+%.dtbo: %.pre.dtso
+	$(DTC) $(DTC_OPTIONS) -I dts -O dtb -o $@ $^
+
+%.itb: %.its %_dtbos
+	mkimage -D "-i$(KERNEL_BUILD_DIR)/arch/arm/boot/ -i$(KERNEL_BUILD_DIR)/arch/arm/boot/dts -p 1000 $(DTC_OPTIONS)" -f $< $@
+
+mtcdt_dtbos: $(MTCDT_DTBO_OBJECTS)
+mtrv1_dtbos: $(MTRV1_DTBO_OBJECTS)
+
+.PHONY: clean
+clean:
+	rm -f */*.dtbo *.itb
-- 
cgit v1.2.3