[PATCH v2 2/3] arm64: dts: rockchip: enable internal pull-up on PCIE_WAKE# for RK3399 Puma

From: Quentin Schulz <foss+kernel@0leil.net>
To: Rob Herring <robh+dt@kernel.org>,
	 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	 Conor Dooley <conor+dt@kernel.org>,
	Heiko Stuebner <heiko@sntech.de>
Cc: Klaus Goger <klaus.goger@theobroma-systems.com>,
	 Quentin Schulz <foss+kernel@0leil.net>,
	devicetree@vger.kernel.org,
	 linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org,
	 linux-kernel@vger.kernel.org,
	 Quentin Schulz <quentin.schulz@theobroma-systems.com>
Subject: [PATCH v2 2/3] arm64: dts: rockchip: enable internal pull-up on PCIE_WAKE# for RK3399 Puma
Date: Fri, 08 Mar 2024 16:46:08 +0100	[thread overview]
Message-ID: <20240308-puma-diode-pu-v2-2-309f83da110a@theobroma-systems.com> (raw)
In-Reply-To: <20240308-puma-diode-pu-v2-0-309f83da110a@theobroma-systems.com>

From: Quentin Schulz <quentin.schulz@theobroma-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@theobroma-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

