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Message-ID: <20251109222858.3085488-4-michael.opdenacker@rootcommit.com>
Date: Sun,  9 Nov 2025 22:30:09 +0000 (UTC)
From: michael.opdenacker@...tcommit.com
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Yixun Lan <dlan@...too.org>,
	Paul Walmsley <pjw@...nel.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alex@...ti.fr>
Cc: Michael Opdenacker <michael.opdenacker@...tcommit.com>,
	devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	spacemit@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] riscv: dts: spacemit: add Gigabit Ethernet and PDMA to OrangePi R2S

From: Michael Opdenacker <michael.opdenacker@...tcommit.com>

The OrangePi R2S board includes two RGMII ethernet ports
supporting Gigabit Ethernet operation.

They have an external Motorcomm YT8531C PHY attached,
the PHY uses GPIO for reset pin control. Their description
was reused from the DTS from the OrangePi RV2 board.

Enable PDMA for the SpacemiT K1-based SoC.

Signed-off-by: Michael Opdenacker <michael.opdenacker@...tcommit.com>

---

tests on eth0
-------------

root@...ngepi-rv2-mainline:~# iperf3 -c 172.24.0.1
Connecting to host 172.24.0.1, port 5201
[ 5] local 172.24.0.2 port 51354 connected to 172.24.0.1 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 113 MBytes 947 Mbits/sec 0 395 KBytes
[ 5] 1.00-2.00 sec 113 MBytes 945 Mbits/sec 0 395 KBytes
[ 5] 2.00-3.00 sec 112 MBytes 936 Mbits/sec 0 395 KBytes
[ 5] 3.00-4.00 sec 112 MBytes 942 Mbits/sec 0 395 KBytes
[ 5] 4.00-5.00 sec 112 MBytes 941 Mbits/sec 0 395 KBytes
[ 5] 5.00-6.00 sec 112 MBytes 940 Mbits/sec 0 409 KBytes
[ 5] 6.00-7.00 sec 113 MBytes 948 Mbits/sec 0 409 KBytes
[ 5] 7.00-8.00 sec 112 MBytes 940 Mbits/sec 0 409 KBytes
[ 5] 8.00-9.00 sec 112 MBytes 941 Mbits/sec 0 414 KBytes
[ 5] 9.00-10.03 sec 113 MBytes 919 Mbits/sec 0 414 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.03 sec 1.10 GBytes 940 Mbits/sec 0 sender
[ 5] 0.00-10.04 sec 1.10 GBytes 939 Mbits/sec receiver

iperf Done.
root@...ngepi-rv2-mainline:~# iperf3 -s
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 172.24.0.1, port 38326
[ 5] local 172.24.0.2 port 5201 connected to 172.24.0.1 port 38332
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 112 MBytes 935 Mbits/sec
[ 5] 1.00-2.00 sec 112 MBytes 942 Mbits/sec
[ 5] 2.00-3.00 sec 112 MBytes 941 Mbits/sec
[ 5] 3.00-4.00 sec 112 MBytes 941 Mbits/sec
[ 5] 4.00-5.00 sec 112 MBytes 942 Mbits/sec
[ 5] 5.00-6.00 sec 112 MBytes 942 Mbits/sec
[ 5] 6.00-7.00 sec 112 MBytes 942 Mbits/sec
[ 5] 7.00-8.00 sec 112 MBytes 942 Mbits/sec
[ 5] 8.00-9.00 sec 112 MBytes 941 Mbits/sec
[ 5] 9.00-10.00 sec 112 MBytes 943 Mbits/sec
[ 5] 10.00-10.01 sec 384 KBytes 725 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.01 sec 1.10 GBytes 941 Mbits/sec receiver

Tests on eth1
------------------

root@...ngepi-rv2-mainline:~# iperf3 -c 172.24.0.1
Connecting to host 172.24.0.1, port 5201
[ 5] local 172.24.0.2 port 60564 connected to 172.24.0.1 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 113 MBytes 947 Mbits/sec 0 423 KBytes
[ 5] 1.00-2.00 sec 113 MBytes 945 Mbits/sec 0 423 KBytes
[ 5] 2.00-3.00 sec 112 MBytes 943 Mbits/sec 0 423 KBytes
[ 5] 3.00-4.00 sec 112 MBytes 938 Mbits/sec 0 423 KBytes
[ 5] 4.00-5.00 sec 112 MBytes 944 Mbits/sec 0 423 KBytes
[ 5] 5.00-6.00 sec 112 MBytes 936 Mbits/sec 0 423 KBytes
[ 5] 6.00-7.00 sec 112 MBytes 943 Mbits/sec 0 423 KBytes
[ 5] 7.00-8.00 sec 112 MBytes 940 Mbits/sec 0 423 KBytes
[ 5] 8.00-9.00 sec 113 MBytes 951 Mbits/sec 0 639 KBytes
[ 5] 9.00-10.01 sec 112 MBytes 934 Mbits/sec 0 639 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.01 sec 1.10 GBytes 943 Mbits/sec 0 sender
[ 5] 0.00-10.02 sec 1.10 GBytes 940 Mbits/sec receiver

iperf Done.
root@...ngepi-rv2-mainline:~# iperf3 -s 172.24.0.1
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 172.24.0.1, port 49628
[ 5] local 172.24.0.2 port 5201 connected to 172.24.0.1 port 49640
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 112 MBytes 934 Mbits/sec
[ 5] 1.00-2.00 sec 112 MBytes 942 Mbits/sec
[ 5] 2.00-3.00 sec 112 MBytes 942 Mbits/sec
[ 5] 3.00-4.00 sec 112 MBytes 942 Mbits/sec
[ 5] 4.00-5.00 sec 112 MBytes 941 Mbits/sec
[ 5] 5.00-6.00 sec 112 MBytes 942 Mbits/sec
[ 5] 6.00-7.00 sec 112 MBytes 942 Mbits/sec
[ 5] 7.00-8.00 sec 112 MBytes 942 Mbits/sec
[ 5] 8.00-9.00 sec 112 MBytes 942 Mbits/sec
[ 5] 9.00-10.00 sec 112 MBytes 941 Mbits/sec
[ 5] 10.00-10.01 sec 640 KBytes 1.14 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.01 sec 1.10 GBytes 941 Mbits/sec receiver
---
 .../boot/dts/spacemit/k1-orangepi-r2s.dts     | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
index 902cb6702fbf..a4007a7a1656 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
@@ -14,6 +14,8 @@ / {
 
 	aliases {
 		serial0 = &uart0;
+		ethernet0 = &eth0;
+		ethernet1 = &eth1;
 	};
 
 	chosen {
@@ -21,6 +23,56 @@ chosen {
 	};
 };
 
+&eth0 {
+	phy-handle = <&rgmii0>;
+	phy-mode = "rgmii-id";
+	pinctrl-names = "default";
+	pinctrl-0 = <&gmac0_cfg>;
+	rx-internal-delay-ps = <0>;
+	tx-internal-delay-ps = <0>;
+	status = "okay";
+
+	mdio-bus {
+		#address-cells = <0x1>;
+		#size-cells = <0x0>;
+
+		reset-gpios = <&gpio K1_GPIO(110) GPIO_ACTIVE_LOW>;
+		reset-delay-us = <10000>;
+		reset-post-delay-us = <100000>;
+
+		rgmii0: phy@1 {
+			reg = <0x1>;
+		};
+	};
+};
+
+&eth1 {
+	phy-handle = <&rgmii1>;
+	phy-mode = "rgmii-id";
+	pinctrl-names = "default";
+	pinctrl-0 = <&gmac1_cfg>;
+	rx-internal-delay-ps = <0>;
+	tx-internal-delay-ps = <250>;
+	status = "okay";
+
+	mdio-bus {
+		#address-cells = <0x1>;
+		#size-cells = <0x0>;
+
+		reset-gpios = <&gpio K1_GPIO(115) GPIO_ACTIVE_LOW>;
+		reset-delay-us = <10000>;
+		reset-post-delay-us = <100000>;
+
+		rgmii1: phy@1 {
+			reg = <0x1>;
+		};
+	};
+};
+
+&pdma {
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_2_cfg>;

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