Refer to PCI Express M.2 Specification r5.1 sec3.1.1 Power Sources and
Grounds.

PCI Express M.2 Socket 1 utilizes a 3.3 V power source. The voltage
source, 3.3 V, is expected to be available during the system’s
stand-by/suspend state to support wake event processing on the
communications card.

Add vpcie3v3aux regulator to let this 3.3 V power source always on for
PCIe M.2 Key E connector on i.MX8MQ EVK board.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
index a88bc90346636..0aad853981761 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
@@ -397,6 +397,7 @@ &pcie1 {
 		 <&clk IMX8MQ_CLK_PCIE2_PHY>,
 		 <&clk IMX8MQ_CLK_PCIE2_AUX>;
 	vpcie-supply = <&reg_pcie1>;
+	vpcie3v3aux-supply = <&reg_pcie1>;
 	vph-supply = <&vgen5_reg>;
 	status = "okay";
 };
-- 
2.37.1