linux-kernel - [PATCH v2 2/3] arm64: dts: rockchip: enable internal pull-up on PCIE

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Date: Fri, 08 Mar 2024 16:46:08 +0100
From: Quentin Schulz <foss+kernel@...il.net>
To: Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: Klaus Goger <klaus.goger@...obroma-systems.com>, 
 Quentin Schulz <foss+kernel@...il.net>, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, 
 Quentin Schulz <quentin.schulz@...obroma-systems.com>
Subject: [PATCH v2 2/3] arm64: dts: rockchip: enable internal pull-up on
 PCIE_WAKE# for RK3399 Puma

From: Quentin Schulz <quentin.schulz@...obroma-systems.com>

The PCIE_WAKE# has a diode used as a level-shifter, and is used as an
input pin. While the SoC default is to enable the pull-up, the core
rk3399 pinconf for this pin opted for pull-none. So as to not disturb
the behaviour of other boards which may rely on pull-none instead of
pull-up, set the needed pull-up only for RK3399 Puma.

Fixes: 60fd9f72ce8a ("arm64: dts: rockchip: add Haikou baseboard with RK3399-Q7 SoM")
Signed-off-by: Quentin Schulz <quentin.schulz@...obroma-systems.com>
---
 arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi
index a51ebb8f8b80f..2484ad2bd86fc 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi
@@ -416,6 +416,11 @@ &io_domains {
 	gpio1830-supply = <&vcc_1v8>;
 };
 
+&pcie_clkreqn_cpm {
+	rockchip,pins =
+		<2 RK_PD2 RK_FUNC_GPIO &pcfg_pull_up>;
+};
+
 &pinctrl {
 	pinctrl-names = "default";
 	pinctrl-0 = <&q7_thermal_pin>;

-- 
2.44.0