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Date: Mon, 15 Jan 2018 13:53:34 +0800
From: Greentime Hu <green.hu@...il.com>
To: greentime@...estech.com, linux-kernel@...r.kernel.org,
arnd@...db.de, linux-arch@...r.kernel.org, tglx@...utronix.de,
jason@...edaemon.net, marc.zyngier@....com, robh+dt@...nel.org,
netdev@...r.kernel.org, deanbo422@...il.com,
devicetree@...r.kernel.org, viro@...iv.linux.org.uk,
dhowells@...hat.com, will.deacon@....com,
daniel.lezcano@...aro.org, linux-serial@...r.kernel.org,
geert.uytterhoeven@...il.com, linus.walleij@...aro.org,
mark.rutland@....com, greg@...ah.com, ren_guo@...ky.com,
rdunlap@...radead.org, davem@...emloft.net, jonas@...thpole.se,
stefan.kristiansson@...nalahti.fi, shorne@...il.com
Cc: green.hu@...il.com, Vincent Chen <vincentc@...estech.com>
Subject: [PATCH v6 26/36] nds32: Device tree support
From: Greentime Hu <greentime@...estech.com>
This patch adds support for device tree.
Signed-off-by: Vincent Chen <vincentc@...estech.com>
Signed-off-by: Greentime Hu <greentime@...estech.com>
---
arch/nds32/boot/dts/Makefile | 8 ++++
arch/nds32/boot/dts/ae3xx.dts | 85 +++++++++++++++++++++++++++++++++++++++++
arch/nds32/kernel/devtree.c | 19 +++++++++
3 files changed, 112 insertions(+)
create mode 100644 arch/nds32/boot/dts/Makefile
create mode 100644 arch/nds32/boot/dts/ae3xx.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..bb39749
--- /dev/null
+++ b/arch/nds32/boot/dts/ae3xx.dts
@@ -0,0 +1,85 @@
+/dts-v1/;
+/ {
+ compatible = "andestech,ae3xx";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ interrupt-parent = <&intc>;
+
+ chosen {
+ stdout-path = &serial0;
+ };
+
+ memory@0 {
+ device_type = "memory";
+ reg = <0x00000000 0x40000000>;
+ };
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cpu@0 {
+ device_type = "cpu";
+ compatible = "andestech,n13", "andestech,nds32v3";
+ reg = <0>;
+ clock-frequency = <60000000>;
+ next-level-cache = <&L2>;
+ };
+ };
+
+ intc: interrupt-controller {
+ compatible = "andestech,ativic32";
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+
+ clock: clk {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <30000000>;
+ };
+
+ apb {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ serial0: serial@...00000 {
+ compatible = "andestech,uart16550", "ns16550a";
+ reg = <0xf0300000 0x1000>;
+ interrupts = <8>;
+ clock-frequency = <14745600>;
+ reg-shift = <2>;
+ reg-offset = <32>;
+ no-loopback-test = <1>;
+ };
+
+ timer0: timer@...00000 {
+ compatible = "andestech,atcpit100";
+ reg = <0xf0400000 0x1000>;
+ interrupts = <2>;
+ clocks = <&clock>;
+ clock-names = "PCLK";
+ };
+ };
+
+ ahb {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ L2: cache-controller@...00000 {
+ compatible = "andestech,atl2c";
+ reg = <0xe0500000 0x1000>;
+ cache-unified;
+ cache-level = <2>;
+ };
+
+ mac0: ethernet@...00000 {
+ compatible = "andestech,atmac100";
+ reg = <0xe0100000 0x1000>;
+ interrupts = <18>;
+ };
+ };
+};
diff --git a/arch/nds32/kernel/devtree.c b/arch/nds32/kernel/devtree.c
new file mode 100644
index 0000000..bdce0fe
--- /dev/null
+++ b/arch/nds32/kernel/devtree.c
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+#include <linux/bug.h>
+#include <linux/printk.h>
+#include <linux/of_fdt.h>
+
+void __init early_init_devtree(void *params)
+{
+ if (!params || !early_init_dt_scan(params)) {
+ pr_crit("\n"
+ "Error: invalid device tree blob at (virtual address 0x%p)\n"
+ "\nPlease check your bootloader.", params);
+
+ BUG_ON(1);
+ }
+
+ dump_stack_set_arch_desc("%s (DT)", of_flat_dt_get_machine_name());
+}
--
1.7.9.5
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