arm64: dts: imx8mq-evk: 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.MX8MQ EVK 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/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
index 852992b915a3996df92827f6a137a6bc01543a17..d48f901487d49ac94cf51fdcc7df718e3a0915bd 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
@@ -398,6 +398,7 @@
                 <&clk IMX8MQ_CLK_PCIE2_PHY>,
                 <&clk IMX8MQ_CLK_PCIE2_AUX>;
        vpcie-supply = <&reg_pcie1>;
+       vpcie3v3aux-supply = <&reg_pcie1>;
        vph-supply = <&vgen5_reg>;
        supports-clkreq;
        status = "okay";