On Fri, Oct 24, 2025 at 03:31:45PM +0800, Richard Zhu wrote:
> 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.
>
> But the current vpcie regulator may be gated off during system suspend. To
> avoid the DT back-compatibility break, add vpcie3v3aux regulator to let this
> 3.3 V power source always on for PCIe M.2 Key E connector on the boards.
>
> [PATCH v1 1/7] arm64: dts: imx8dxl-evk: Add vpcie3v3aux regulator for
> [PATCH v1 2/7] arm64: dts: imx8mp-evk: Add vpcie3v3aux regulator for
> [PATCH v1 3/7] arm64: dts: imx8mq-evk: Add vpcie3v3aux regulator for
> [PATCH v1 4/7] arm64: dts: imx8qm-mek: Add vpcie3v3aux regulator for
> [PATCH v1 5/7] arm64: dts: imx8qxp-mek: Add vpcie3v3aux regulator for
> [PATCH v1 6/7] arm64: dts: imx95-15x15-evk: Add vpcie3v3aux regulator
> [PATCH v1 7/7] arm64: dts: imx95-19x19-evk: Add vpcie3v3aux regulator
For all patches
Reviewed-by: Frank Li <Frank.Li@nxp.com>
>
> arch/arm64/boot/dts/freescale/imx8dxl-evk.dts | 1 +
> arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 1 +
> arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 1 +
> arch/arm64/boot/dts/freescale/imx8qm-mek.dts | 1 +
> arch/arm64/boot/dts/freescale/imx8qxp-mek.dts | 1 +
> arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts | 1 +
> arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts | 2 ++
> 7 files changed, 8 insertions(+)
>
>