[PATCH V3 7/8] arm64: dts: imx8qm-mek: Describe the PCIe M.2 Key E connector
From: Sherry Sun (OSS) <hidden>
Date: 2026-06-26 02:31:17
Also in:
imx, linux-bluetooth, linux-devicetree, linux-pci, linux-pm, lkml
Subsystem:
arm/freescale imx / mxc arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
From: Sherry Sun <redacted> The i.MX8QM-MEK has the PCIe M.2 Mechanical Key E connector to connect wireless connectivity cards over PCIe and UART interfaces. Hence, describe the connector node and link it with the PCIe a Root Port and LPUART1 nodes through graph port/endpoint. The M.2 Key E connector is powered by a 3.3V fixed regulator (reg_3v3) on board. Signed-off-by: Sherry Sun <redacted> --- arch/arm64/boot/dts/freescale/imx8qm-mek.dts | 58 +++++++++++++++----- 1 file changed, 43 insertions(+), 15 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
index 5e725ad8aef9..4c02592cfe14 100644
--- a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts@@ -32,6 +32,39 @@ memory@80000000 { reg = <0x00000000 0x80000000 0 0x40000000>; }; + m2-connector { + compatible = "pcie-m2-e-connector"; + pinctrl-0 = <&pinctrl_pciea_reg>; + pinctrl-names = "default"; + vpcie3v3-supply = <®_3v3>; + w-disable1-gpios = <&lsio_gpio1 13 GPIO_ACTIVE_LOW>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0>; + m2_e_pcie_ep: endpoint@0 { + reg = <0>; + remote-endpoint = <&pciea_port0_ep>; + }; + }; + + port@3 { + #address-cells = <1>; + #size-cells = <0>; + reg = <3>; + m2_e_uart_ep: endpoint@0 { + reg = <0>; + remote-endpoint = <&lpuart1_ep>; + }; + }; + }; + }; + xtal24m: clock-xtal24m { compatible = "fixed-clock"; #clock-cells = <0>;
@@ -320,17 +353,6 @@ reg_can2_stby: regulator-can2-stby { vin-supply = <®_can2_en>; }; - reg_pciea: regulator-pcie { - compatible = "regulator-fixed"; - pinctrl-0 = <&pinctrl_pciea_reg>; - pinctrl-names = "default"; - regulator-max-microvolt = <3300000>; - regulator-min-microvolt = <3300000>; - regulator-name = "mpcie_3v3"; - gpio = <&lsio_gpio1 13 GPIO_ACTIVE_HIGH>; - enable-active-high; - }; - reg_usb_otg1_vbus: regulator-usbotg1-vbus { compatible = "regulator-fixed"; regulator-name = "usb_otg1_vbus";
@@ -718,8 +740,10 @@ &lpuart1 { pinctrl-0 = <&pinctrl_lpuart1>; status = "okay"; - bluetooth { - compatible = "nxp,88w8987-bt"; + port { + lpuart1_ep: endpoint { + remote-endpoint = <&m2_e_uart_ep>; + }; }; };
@@ -818,8 +842,12 @@ &pciea { &pciea_port0 { reset-gpios = <&lsio_gpio4 29 GPIO_ACTIVE_LOW>; - vpcie-supply = <®_pciea>; - vpcie3v3aux-supply = <®_pciea>; + + port { + pciea_port0_ep: endpoint { + remote-endpoint = <&m2_e_pcie_ep>; + }; + }; }; &pcieb {
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2.50.1