arm64: dts: imx8qxp-mek: Add vpcie3v3aux regulator for PCIe M.2 connector

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.MX8QXP MEK board.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts b/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
index 7c773782393d2ff9924b7e77ebcc31c43b13b53b..e092e136854badf71084bf76756aa143c8ad98fa 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
@@ -640,6 +640,7 @@
        pinctrl-names = "default";
        reset-gpios = <&lsio_gpio4 0 GPIO_ACTIVE_LOW>;
        vpcie-supply = <&reg_pcieb>;
+       vpcie3v3aux-supply = <&reg_pcieb>;
        supports-clkreq;
        status = "okay";
 };