linux-kernel - [PATCH 0/1] riscv: dts: spacemit: Disable ETH PHY sleep mode for OrangePi

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Message-Id: <20260120100001.1285624-1-amadeus@jmu.edu.cn>
Date: Tue, 20 Jan 2026 18:00:00 +0800
From: Chukun Pan <amadeus@....edu.cn>
To: Yixun Lan <dlan@...nel.org>
Cc: Rob Herring <robh@...nel.org>,
	Paul Walmsley <pjw@...nel.org>,
	Alexandre Ghiti <alex@...ti.fr>,
	Albert Ou <aou@...s.berkeley.edu>,
	Palmer Dabbelt <palmer@...belt.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	spacemit@...ts.linux.dev,
	Chukun Pan <amadeus@....edu.cn>
Subject: [PATCH 0/1] riscv: dts: spacemit: Disable ETH PHY sleep mode for OrangePi

On OrangePi R2S and RV2 boards, when the interface link down,
reading statistics will print several timeout logs:

root@...nWrt:~# ethtool -S eth1
[   71.725539] k1_emac cac81000.ethernet eth1: Read stat timeout
NIC statistics:
     rx_drp_fifo_full_pkts: 0
     rx_truncate_fifo_full_pkts: 0

Both OrangePi R2S and RV2 use the YT8531C PHY. The same issue occurs
when enabling ALDPS mode (Link Down Power Saving Mode) on other boards
that use the RTL8211F PHY, such as the BananaPi BPI-F3 board [1].

So disable PHY sleep mode for OrangePi R2S and RV2 to avoid this problem.

[1] https://lore.kernel.org/all/f63d455c-7593-4382-86ef-9c31a1ebd283@iscas.ac.cn/

Chukun Pan (1):
  riscv: dts: spacemit: Disable ETH PHY sleep mode for OrangePi

 arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts | 2 ++
 arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 2 ++
 2 files changed, 4 insertions(+)

-- 
2.25.1