linux-kernel - [PATCH] arm64: dts: rockchip: remove startup-delay-us from vcc3v3

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Date: Mon,  1 Apr 2024 16:13:02 +0800
From: Jianfeng Liu <liujianfeng1994@...il.com>
To: devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: robh@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org,
	heiko@...ech.de,
	sfr@...b.auug.org.au,
	liujianfeng1994@...il.com
Subject: [PATCH] arm64: dts: rockchip: remove startup-delay-us from vcc3v3_pcie2x1l0 on rock-5b

Property startup-delay-us is copied from vendor dts and it will
make kernel not detect pcie wifi device. If I run command:
"echo 1 > /sys/bus/pci/rescan", pcie wifi device is detected, but
my wifi device RTL8822CE failed to load driver. Another device
RTL8723BE can load driver but no wifi signal is detected.

Removing this property will fix issues above.

Signed-off-by: Jianfeng Liu <liujianfeng1994@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
index d6bf2ee07..a9af654a0 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
@@ -76,7 +76,6 @@ vcc3v3_pcie2x1l0: vcc3v3-pcie2x1l0-regulator {
 		regulator-boot-on;
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
-		startup-delay-us = <50000>;
 		vin-supply = <&vcc5v0_sys>;
 	};

--
2.34.1