[PATCH v1] arm64: dts: rockchip: Enable PCIe CLKREQ# for RK3588 on Rock 5b-5bp-5t series

[Anand Moon]

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>
---
 arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi | 9 ++++++---
 1 file changed, 6 insertions(+), 3 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..668b19c05f7e 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";
@@ -488,7 +490,8 @@ &pcie30phy {
 
 &pcie3x4 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&pcie3_rst>;
+	pinctrl-0 = <&pcie3_rst>, <&pcie30x4m1_clkreqn>;
+	supports-clkreq;
 	reset-gpios = <&gpio4 RK_PB6 GPIO_ACTIVE_HIGH>;
 	vpcie3v3-supply = <&vcc3v3_pcie30>;
 	status = "okay";

base-commit: b29fb8829bff243512bb8c8908fd39406f9fd4c3
-- 
2.50.1