From d1fc19265ab7f85c9a254a7c278069ef8a6ecfdb Mon Sep 17 00:00:00 2001
From: John Crispin <john@openwrt.org>
Date: Mon, 5 Oct 2015 10:27:41 +0000
Subject: [PATCH] brcm2708: add support for device tree overlays
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Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

SVN-Revision: 47125
---
 target/linux/brcm2708/image/Makefile   | 7 +++++++
 target/linux/brcm2708/image/config.txt | 9 +++++++++
 2 files changed, 16 insertions(+)

diff --git a/target/linux/brcm2708/image/Makefile b/target/linux/brcm2708/image/Makefile
index 7a68c506cfb..3744cace58c 100644
--- a/target/linux/brcm2708/image/Makefile
+++ b/target/linux/brcm2708/image/Makefile
@@ -21,6 +21,12 @@ else
   endef
 endif
 
+define Image/Prepare
+	rm -rf $(KDIR)/overlays
+	mkdir -p $(KDIR)/overlays
+	$(CP) $(DTS_DIR)/overlays/*.dtb $(KDIR)/overlays/
+endef
+
 ### Image scripts ###
 define Build/gen-cfg
 	cat config.txt > $@.config
@@ -41,6 +47,7 @@ define Build/boot-img
 	mcopy -i $@.boot $@.config ::config.txt
 	mcopy -i $@.boot $(word 1,$^) ::kernel.img
 	mcopy -i $@.boot $(DTS_DIR)/$(DEVICE_DTS).dtb ::$(DEVICE_DTS).dtb
+	mcopy -s -i $@.boot $(KDIR)/overlays ::
 endef
 
 define Build/sdcard-img
diff --git a/target/linux/brcm2708/image/config.txt b/target/linux/brcm2708/image/config.txt
index f66f6bc3f32..1fb880f9be5 100644
--- a/target/linux/brcm2708/image/config.txt
+++ b/target/linux/brcm2708/image/config.txt
@@ -927,3 +927,12 @@ init_uart_clock=3000000
 ################################################################################
 
 dtparam=random=on,watchdog=on,audio=on,i2c0=on,i2c1=on,spi=on
+
+#dtoverlay=hifiberry-amp-overlay
+#dtoverlay=hifiberry-dac-overlay
+#dtoverlay=hifiberry-dacplus-overlay
+#dtoverlay=hifiberry-digi-overlay
+#dtoverlay=iqaudio-dac-overlay
+#dtoverlay=iqaudio-dacplus-overlay
+#dtoverlay=raspidac3-overlay
+#dtoverlay=rpi-proto-overlay