[PATCH V4 07/11] arm64: dts: imx8mm: Add Root Port node and PERST property
From: Sherry Sun <hidden>
Date: 2026-02-09 08:24:38
Also in:
imx, linux-devicetree, linux-pci, lkml
Subsystem:
arm/freescale imx / mxc arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
Since describing the PCIe PERST# property under Host Bridge node is now deprecated, it is recommended to add it to the Root Port node, so creating the Root Port node and add the reset-gpios property in Root Port. Signed-off-by: Sherry Sun <redacted> --- arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 5 +++++ arch/arm64/boot/dts/freescale/imx8mm.dtsi | 11 +++++++++++ 2 files changed, 16 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
index 6eab8a6001db..060860f24e7a 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi@@ -533,6 +533,7 @@ &pcie_phy { &pcie0 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_pcie0>; + /* This property is deprecated, use reset-gpios from the Root Port node. */ reset-gpio = <&gpio4 21 GPIO_ACTIVE_LOW>; clocks = <&clk IMX8MM_CLK_PCIE1_ROOT>, <&pcie0_refclk>, <&clk IMX8MM_CLK_PCIE1_AUX>;
@@ -559,6 +560,10 @@ &pcie0_ep { status = "disabled"; }; +&pcie0_port0 { + reset-gpios = <&gpio4 21 GPIO_ACTIVE_LOW>; +}; + &sai2 { #sound-dai-cells = <0>; pinctrl-names = "default";
diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index 9f49c0b386d3..1204cc4d3f37 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi@@ -1369,6 +1369,17 @@ pcie0: pcie@33800000 { phys = <&pcie_phy>; phy-names = "pcie-phy"; status = "disabled"; + + pcie0_port0: pcie@0 { + compatible = "pciclass,0604"; + device_type = "pci"; + reg = <0x0 0x0 0x0 0x0 0x0>; + bus-range = <0x01 0xff>; + + #address-cells = <3>; + #size-cells = <2>; + ranges; + }; }; pcie0_ep: pcie-ep@33800000 {
--
2.37.1