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The following rules define how the L1.1 and L1.2 substates are entered: Both the Upstream and Downstream Ports must monitor the logical state of the CLKREQ# signal. Typical implement is using open drain, which connect RC's clkreq# to EP's clkreq# together and pull up clkreq#. imx95-19x19-evk matches this requirement, so add supports-clkreq to allow PCIe device enter ASPM L1 Sub-State. Signed-off-by: Richard Zhu --- arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts index 9f968feccef67..0f470d3eb9af4 100644 --- a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts +++ b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts @@ -542,6 +542,7 @@ &pcie0 { pinctrl-names = "default"; reset-gpio = <&i2c7_pcal6524 5 GPIO_ACTIVE_LOW>; vpcie-supply = <®_pcie0>; + supports-clkreq; status = "okay"; }; -- 2.37.1