[PATCH v2] arm64: dts: rockchip: Enable PCIe CLKREQ# for RK3588 on Rock 5b-5bp-5t series

[Shawn Lin]

在 2026/03/16 星期一 15:33, Anand Moon 写道:
> 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 <shawn.lin at rock-chips.com>
> Signed-off-by: Anand Moon <linux.amoon at gmail.com>
> ---
> Rock5b schematics.
> [1]  https://dl.radxa.com/rock5/5b+/docs/hw/radxa_rock5bp_v1.2_schematic.pdf
> v2: drop the clkreq pinctrl for pcie3x4 as suggeested by Shwan Lin.
> [2] https://lore.kernel.org/all/20260311115502.7353-1-linux.amoon@gmail.com/
> ---
>   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 b3e76ad2d8694..bf4a1d2e55ca3 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

Reviewed-by: Shawn Lin <shawn.lin at rock-chips.com>

Thanks.

> @@ -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";
> 
> base-commit: f338e77383789c0cae23ca3d48adcc5e9e137e3c
>