From: Greentime Hu <redacted>

This patch adds support for device tree.

Signed-off-by: Vincent Chen <redacted>
Signed-off-by: Greentime Hu <redacted>
---
 arch/nds32/boot/dts/Makefile   |    8 ++++++
 arch/nds32/boot/dts/ae3xx.dts  |   55 ++++++++++++++++++++++++++++++++++++
 arch/nds32/boot/dts/ag101p.dts |   60 ++++++++++++++++++++++++++++++++++++++++
 arch/nds32/kernel/devtree.c    |   45 ++++++++++++++++++++++++++++++
 4 files changed, 168 insertions(+)
 create mode 100644 arch/nds32/boot/dts/Makefile
 create mode 100644 arch/nds32/boot/dts/ae3xx.dts
 create mode 100644 arch/nds32/boot/dts/ag101p.dts
 create mode 100644 arch/nds32/kernel/devtree.c

diff --git a/arch/nds32/boot/dts/Makefile b/arch/nds32/boot/dts/Makefile
new file mode 100644
index 0000000..d31faa8
--- /dev/null
+++ b/arch/nds32/boot/dts/Makefile

@@ -0,0 +1,8 @@
+ifneq '$(CONFIG_NDS32_BUILTIN_DTB)' '""'

+BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_NDS32_BUILTIN_DTB)).dtb.o
+else
+BUILTIN_DTB :=
+endif
+obj-$(CONFIG_OF) += $(BUILTIN_DTB)
+
+clean-files := *.dtb *.dtb.S

diff --git a/arch/nds32/boot/dts/ae3xx.dts b/arch/nds32/boot/dts/ae3xx.dts
new file mode 100644
index 0000000..4181060
--- /dev/null
+++ b/arch/nds32/boot/dts/ae3xx.dts

@@ -0,0 +1,55 @@
+/dts-v1/;
+/ {
+       compatible = "nds32 ae3xx";

+               compatible = "andestech,atmac100";
+               reg = <0xe0100000 0x1000>;
+               interrupts = <18>;
+       };
+
+};

diff --git a/arch/nds32/boot/dts/ag101p.dts b/arch/nds32/boot/dts/ag101p.dts
new file mode 100644
index 0000000..f1cb540
--- /dev/null
+++ b/arch/nds32/boot/dts/ag101p.dts

@@ -0,0 +1,60 @@
+/dts-v1/;
+/ {
+       compatible = "nds32 ag101p";

+       #address-cells = <1>;
+       #size-cells = <1>;
+       interrupt-parent = <&intc>;
+
+       chosen {
+               bootargs = "earlycon console=ttyS0,38400n8 debug loglevel=7";
+               stdout-path = &serial0;
+       };
+
+       memory@0 {
+               device_type = "memory";
+               reg = <0x00000000 0x40000000>;
+       };
+
+       cpu@0 {
+               device_type = "cpu";
+               compatible = "andestech,n13";
+               clock-frequency = <60000000>;
+               next-level-cache = <&L2>;
+       };
+
+       intc: interrupt-controller {
+               compatible = "andestech,ativic32";
+               #interrupt-cells = <2>;
+               interrupt-controller;
+       };
+
+       serial0: serial@99600000 {
+               compatible = "andestech,uart16550", "ns16550a";
+               reg = <0x99600000 0x1000>;
+               interrupts = <7 4>;
+               clock-frequency = <14745600>;
+               reg-shift = <2>;
+               no-loopback-test = <1>;
+       };
+
+       timer0: timer@98400000 {
+               compatible = "andestech,atftmr010";
+               reg = <0x98400000 0x1000>;
+               interrupts = <19 4>;
+               clock-frequency = <15000000>;
+               cycle-count-offset = <0x20>;
+       };
+
+       mac0: mac@90900000 {
+               compatible = "andestech,atmac100";
+               reg = <0x90900000 0x1000>;
+               interrupts = <25 4>;
+       };
+
+       L2: l2-cache {
+               compatible = "andestech,atl2c";
+               reg = <0x90f00000 0x1000>;
+               cache-unified;
+               cache-level = <2>;
+       };
+};

diff --git a/arch/nds32/kernel/devtree.c b/arch/nds32/kernel/devtree.c
new file mode 100644
index 0000000..2af0f1c
--- /dev/null
+++ b/arch/nds32/kernel/devtree.c

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2005-2017 Andes Technology Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/memblock.h>
+#include <linux/of_fdt.h>
+#include <linux/bootmem.h>
+
+void __init early_init_dt_add_memory_arch(u64 base, u64 size)
+{
+       size &= PAGE_MASK;
+       memblock_add_node(base, size, 0);
+}
+
+void *__init early_init_dt_alloc_memory_arch(u64 size, u64 align)
+{
+       return alloc_bootmem_align(size, align);
+}