[PATCH v2 0/2] riscv: spacemit: initial support for OrangePi R2S

Mon Nov 10 02:11:19 PST 2025

From: Michael Opdenacker <michael.opdenacker at rootcommit.com>

This adds initial support for the OrangePi R2S board [1], which
is marketed as using the Ky X1 SoC but is in fact identical to
the SpacemiT K1 SoC [2].

What makes this board attractive is its 4 Ethernet ports
(2 x Gigagit RGMII with an external Motorcomm YT8531C PHY,
and 2 x 2.5 Gigabit Ethernet with RTL8125BG on an internal
PCI Express bus), its small form factor and its attractive
pricing like other OrangePi boards.

What is supported:
- Serial console on serial UART
- 8 GB eMMC
- 2x Gigabit RGMII Ethernet ports

This patch series is based on Spacemit's Linux tree,
"linux-for-next" branch [3]

Link: http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/Orange-Pi-R2S.html [1]
Link: https://www.spacemit.com/en/key-stone-k1 [2]
Link: https://github.com/spacemit-com/linux/commits/k1/dt-for-next [3]

Changes in V2
- Squash 3 commits for initial DTS, Ethernet & PDMA, and eMMC

==========
eMMC tests
==========

Read tests
----------

hdparm -t --direct /dev/mmcblk0

/dev/mmcblk0:
Timing O_DIRECT disk reads: 846 MB in 3.01 seconds = 281.52 MB/sec

Write tests
-----------

dd if=/dev/zero of=/dev/mmcblk0p2 bs=4M oflag=direct status=progress
7600078848 bytes (7.6 GB, 7.1 GiB) copied, 127 s, 59.8 MB/s
dd: error writing '/dev/mmcblk0p2': No space left on device
1825+0 records in
1824+0 records out
7650410496 bytes (7.7 GB, 7.1 GiB) copied, 127.866 s, 59.8 MB/s

==============
Ethernet tests
==============

Tests on eth0
-------------

root at orangepi-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 at orangepi-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 at orangepi-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 at orangepi-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

Michael Opdenacker (2):
  dt-bindings: riscv: spacemit: Add OrangePi R2S board
  riscv: dts: spacemit: Add OrangePi R2S board device tree

 .../devicetree/bindings/riscv/spacemit.yaml   |  1 +
 arch/riscv/boot/dts/spacemit/Makefile         |  1 +
 .../boot/dts/spacemit/k1-orangepi-r2s.dts     | 90 +++++++++++++++++++
 3 files changed, 92 insertions(+)
 create mode 100644 arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts