[PATCH] arm64: dts: rockchip: rock-3b: Add phy-supply to pcie30phy

From: MidG971 <midgy971@gmail.com>
To: linux-rockchip@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	heiko@sntech.de, jonas@kwiboo.se, MidG971 <midgy971@gmail.com>,
	Claude <noreply@anthropic.com>
Subject: [PATCH] arm64: dts: rockchip: rock-3b: Add phy-supply to pcie30phy
Date: Fri, 13 Feb 2026 16:14:52 +0100	[thread overview]
Message-ID: <20260213151452.535527-1-midgy971@gmail.com> (raw)

The PCIe 3.0 PHY requires its power supply regulator to be enabled
before initialization. Without the phy-supply property, the PHY
driver does not ensure the regulator is enabled, causing SRAM
initialization to timeout with "lock failed" errors:

  phy phy-fe8c0000.phy.1: phy poweron failed --> -110
  rockchip-snps-pcie3-phy fe8c0000.phy: PCIe3PHY lock failed 0x6890000
  rockchip-pcie fe280000.pcie: phy init failed: -110

This results in NVMe devices in the M.2 slot not being detected.

Add phy-supply referencing vcc3v3_pi6c_03 regulator (which controls
the PI6C PCIe clock generator power via GPIO0_D4) to ensure proper
power sequencing during PHY initialization.

Fixes: 846ef7748fa9 ("arm64: dts: rockchip: Add Radxa ROCK 3B")
Signed-off-by: MidG971 <midgy971@gmail.com>
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Claude <noreply@anthropic.com>
---
 arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts
index c5f67dd6dfd9..a1b2c3d4e5f6 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts
@@ -404,6 +404,7 @@ &pcie2x1 {
 };

 &pcie30phy {
+	phy-supply = <&vcc3v3_pi6c_03>;
 	status = "okay";
 };

--
2.39.5

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