From 3c4b46cd26fbfa24f525e702d6e8ed9111922202 Mon Sep 17 00:00:00 2001 From: Anand Moon Date: Mon, 16 Mar 2026 13:03:55 +0530 Subject: [PATCH] arm64: dts: rockchip: Enable PCIe CLKREQ# for RK3588 on Rock 5b-5bp-5t series Add supports-clkreq and the corresponding pinmux configurations for PCIe ASPM L1 substates on the Rock 5B, 5B+ and 5T. The supports-clkreq flag informs the PCIe controller that the hardware routing for the CLKREQ# sideband signal is present. This enables support for PCIe ASPM (Active State Power Management) L1 substates, allowing for better power efficiency. Cc: Shawn Lin Signed-off-by: Anand Moon Reviewed-by: Shawn Lin Link: https://patch.msgid.link/20260316073621.39027-1-linux.amoon@gmail.com Signed-off-by: Heiko Stuebner --- arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi index b3e76ad2d869..bf4a1d2e55ca 100644 --- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi @@ -468,7 +468,8 @@ map1 { &pcie2x1l0 { pinctrl-names = "default"; - pinctrl-0 = <&pcie2_0_rst>; + pinctrl-0 = <&pcie2_0_rst>, <&pcie30x1m1_0_clkreqn>; + supports-clkreq; reset-gpios = <&gpio4 RK_PA5 GPIO_ACTIVE_HIGH>; vpcie3v3-supply = <&vcc3v3_pcie2x1l0>; status = "okay"; @@ -476,7 +477,8 @@ &pcie2x1l0 { &pcie2x1l2 { pinctrl-names = "default"; - pinctrl-0 = <&pcie2_2_rst>; + pinctrl-0 = <&pcie2_2_rst>, <&pcie20x1m0_clkreqn>; + supports-clkreq; reset-gpios = <&gpio3 RK_PB0 GPIO_ACTIVE_HIGH>; vpcie3v3-supply = <&vcc3v3_pcie2x1l2>; status = "okay";