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Mon, 16 Mar 2026 00:36:32 -0700 (PDT) Received: from rockpi-5b ([45.112.0.200]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82a07244071sm12933375b3a.6.2026.03.16.00.36.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Mar 2026 00:36:31 -0700 (PDT) From: Anand Moon To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , FUKAUMI Naoki , Nicolas Frattaroli , Sebastian Reichel , Diederik de Haas , devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Rockchip SoC support), linux-rockchip@lists.infradead.org (open list:ARM/Rockchip SoC support), linux-kernel@vger.kernel.org (open list) Cc: Anand Moon , Shawn Lin Subject: [PATCH v2] arm64: dts: rockchip: Enable PCIe CLKREQ# for RK3588 on Rock 5b-5bp-5t series Date: Mon, 16 Mar 2026 13:03:55 +0530 Message-ID: <20260316073621.39027-1-linux.amoon@gmail.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- 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 @@ -468,7 +468,8 @@ map1 { =20 &pcie2x1l0 { pinctrl-names =3D "default"; - pinctrl-0 =3D <&pcie2_0_rst>; + pinctrl-0 =3D <&pcie2_0_rst>, <&pcie30x1m1_0_clkreqn>; + supports-clkreq; reset-gpios =3D <&gpio4 RK_PA5 GPIO_ACTIVE_HIGH>; vpcie3v3-supply =3D <&vcc3v3_pcie2x1l0>; status =3D "okay"; @@ -476,7 +477,8 @@ &pcie2x1l0 { =20 &pcie2x1l2 { pinctrl-names =3D "default"; - pinctrl-0 =3D <&pcie2_2_rst>; + pinctrl-0 =3D <&pcie2_2_rst>, <&pcie20x1m0_clkreqn>; + supports-clkreq; reset-gpios =3D <&gpio3 RK_PB0 GPIO_ACTIVE_HIGH>; vpcie3v3-supply =3D <&vcc3v3_pcie2x1l2>; status =3D "okay"; base-commit: f338e77383789c0cae23ca3d48adcc5e9e137e3c --=20 2.50.1