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From c3b04609d32488d0fb5f83905134e6c2af59f9a5 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Mon, 1 Apr 2024 00:20:56 +0200
Subject: arm64: dts: rockchip: Remove unsupported node from the Pinebook Pro
dts
From: Dragan Simic <dsimic@manjaro.org>
[ Upstream commit 43853e843aa6c3d47ff2b0cce898318839483d05 ]
Remove a redundant node from the Pine64 Pinebook Pro dts, which is intended
to provide a value for the delay in PCI Express enumeration, but that isn't
supported without additional out-of-tree kernel patches.
There were already efforts to upstream those kernel patches, because they
reportedly make some PCI Express cards (such as LSI SAS HBAs) usable in
Pine64 RockPro64 (which is also based on the RK3399); otherwise, those PCI
Express cards fail to enumerate. However, providing the required background
and explanations proved to be a tough nut to crack, which is the reason why
those patches remain outside of the kernel mainline for now.
If those out-of-tree patches eventually become upstreamed, the resulting
device-tree changes will almost surely belong to the RK3399 SoC dtsi. Also,
the above-mentioned unusable-without-out-of-tree-patches PCI Express devices
are in all fairness not usable in a Pinebook Pro without some extensive
hardware modifications, which is another reason to delete this redundant
node. When it comes to the Pinebook Pro, only M.2 NVMe SSDs can be installed
out of the box (using an additional passive adapter PCB sold separately by
Pine64), which reportedly works fine with no additional patches.
Fixes: 5a65505a6988 ("arm64: dts: rockchip: Add initial support for Pinebook Pro")
Signed-off-by: Dragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/0f82c3f97cb798d012270d13b34d8d15305ef293.1711923520.git.dsimic@manjaro.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
index 194e48c755f6b..a51e8d0493cab 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
@@ -789,7 +789,6 @@
};
&pcie0 {
- bus-scan-delay-ms = <1000>;
ep-gpios = <&gpio2 RK_PD4 GPIO_ACTIVE_HIGH>;
num-lanes = <4>;
pinctrl-names = "default";
--
2.43.0
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