linux-kernel - [PATCH v2] arm64: dts: rockchip: Add missing pinctrl for PCIe30x4 node

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Message-ID: <20240711060939.1128-1-linux.amoon@gmail.com>
Date: Thu, 11 Jul 2024 11:39:34 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>
Cc: Anand Moon <linux.amoon@...il.com>,
	Jonas Karlman <jonas@...boo.se>,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] arm64: dts: rockchip: Add missing pinctrl for PCIe30x4 node

Add missing pinctrl settings for PCIe 3.0 x4 clock request and wake
signals.Each component of PCIe communication have the following control
signals: PERST, WAKE, CLKREQ, and REFCLK. These signals work to generate
high-speed signals and communicate with other PCIe devices.
Used by root complex to endpoint depending on the power state.

PERST is referred to as a fundamental reset. PERST should be held low
until all the power rails in the system and the reference clock are stable.
A transition from low to high in this signal usually indicates the
beginning of link initialization.

WAKE signal is an active-low signal that is used to return the PCIe
interface to an active state when in a low-power state.

CLKREQ signal is also an active-low signal and is used to request the
reference clock.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
V2: Update the commit messge to describe the changs.
    use pinctl group as its pre define in pinctl dtsi
---
 arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
index 2e7512676b7e..ab3a20986c6a 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
@@ -301,7 +301,7 @@ &pcie30phy {

 &pcie3x4 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&pcie3_rst>;
+	pinctrl-0 = <&pcie30x4m1_pins>;
 	reset-gpios = <&gpio4 RK_PB6 GPIO_ACTIVE_HIGH>;
 	vpcie3v3-supply = <&vcc3v3_pcie30>;
 	status = "okay";
@@ -341,10 +341,6 @@ pcie2_2_rst: pcie2-2-rst {
 	};

 	pcie3 {
-		pcie3_rst: pcie3-rst {
-			rockchip,pins = <4 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>;
-		};
-
 		pcie3_vcc3v3_en: pcie3-vcc3v3-en {
 			rockchip,pins = <1 RK_PA4 RK_FUNC_GPIO &pcfg_pull_none>;
 		};

base-commit: 34afb82a3c67f869267a26f593b6f8fc6bf35905
-- 
2.44.0