[PATCH v7 4/7] MIPS: Loongson: introduce dts for lemote A1901 3a4000 motherboard

[Sui Jingfeng]

From: suijingfeng <suijingfeng at loongson.cn>

This board has only one VGA output which is connected to DVO1 of
the display controller. More details about this motherboard can be
read from [1].

    +------+            +-----------------------------------+
    | DDR4 |            |  +-------------------+            |
    +------+            |  | PCIe Root complex |   LS7A1000 |
       || MC0           |  +--++---------++----+            |
  +----------+  HT 3.0  |     ||         ||                 |
  | LS3A4000 |<-------->| +---++---+  +--++--+    +---------+   +------+
  |   CPU    |<-------->| | GC1000 |  | LSDC |<-->| DDR3 MC |<->| VRAM |
  +----------+          | +--------+  +-+--+-+    +---------+   +------+
       || MC1           +---------------|--|----------------+
    +------+                            |  |
    | DDR4 |       DVO0 is not get used |  |  DVO1   +-------+
    +------+       <--------------------+  +-------->|ADV7125|---> VGA
                                                     +-------+

Note, LEMOTE corporation is one of the downstream board manufacturer of
LOONGSON. The model property can be used to tell the kernel board specific
information.

[1] https://wiki.godson.ac.cn/device:lemote_a1901

Signed-off-by: suijingfeng <suijingfeng at loongson.cn>
Signed-off-by: Sui Jingfeng <15330273260 at 189.cn>
---
 arch/mips/boot/dts/loongson/lemote_a1901.dts | 59 ++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 arch/mips/boot/dts/loongson/lemote_a1901.dts

diff --git a/arch/mips/boot/dts/loongson/lemote_a1901.dts b/arch/mips/boot/dts/loongson/lemote_a1901.dts
new file mode 100644
index 000000000000..ca57c27ad845
--- /dev/null
+++ b/arch/mips/boot/dts/loongson/lemote_a1901.dts
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/dts-v1/;
+
+#include "loongson64g-package.dtsi"
+#include "ls7a-pch.dtsi"
+
+/ {
+	model = "LX-6901";
+};
+
+&package0 {
+	htvec: interrupt-controller at efdfb000080 {
+		compatible = "loongson,htvec-1.0";
+		reg = <0xefd 0xfb000080 0x40>;
+		interrupt-controller;
+		#interrupt-cells = <1>;
+
+		interrupt-parent = <&liointc>;
+		interrupts = <24 IRQ_TYPE_LEVEL_HIGH>,
+			     <25 IRQ_TYPE_LEVEL_HIGH>,
+			     <26 IRQ_TYPE_LEVEL_HIGH>,
+			     <27 IRQ_TYPE_LEVEL_HIGH>,
+			     <28 IRQ_TYPE_LEVEL_HIGH>,
+			     <29 IRQ_TYPE_LEVEL_HIGH>,
+			     <30 IRQ_TYPE_LEVEL_HIGH>,
+			     <31 IRQ_TYPE_LEVEL_HIGH>;
+	};
+};
+
+&pch {
+	msi: msi-controller at 2ff00000 {
+		compatible = "loongson,pch-msi-1.0";
+		reg = <0 0x2ff00000 0 0x8>;
+		interrupt-controller;
+		msi-controller;
+		loongson,msi-base-vec = <64>;
+		loongson,msi-num-vecs = <192>;
+		interrupt-parent = <&htvec>;
+	};
+};
+
+&lsdc {
+	output-ports = <&dvo0 &dvo1>;
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	dvo0: dvo at 0 {
+		reg = <0>;
+		status = "disabled";
+	};
+
+	dvo1: dvo at 1 {
+		reg = <1>;
+		connector = "vga-connector";
+		status = "okay";
+	};
+};
-- 
2.25.1