On Thu, Mar 26, 2026 at 03:28:04PM +0800, Peng Fan (OSS) wrote:
> As reported in [1], there is interrupt storm for i.MX8MP DEBIX Model A.
> Per schematic, there is no on board PULL-UP resistors for GPIO1_IO03,
> so need to set PAD PUE and PU together to make pull up work properly.
>
> DEBIX Model SOM also has same issue as reported in [2].
>
> I gave a check on current i.MX8MP based boards, most boards have wrong
> PAD settings with PMIC_nINT. It is low level triggered interrupt.
> many boards only set PU, but PUE not set, so pull up not work properly.
>
> Patch 1 and 2 are to fix issue that confirmed by Laurent and Kieran.
>
> I checked AB2 and NAVQ schematic, so these two boards are also having
> same issue.
>
> For other boards, I not able to find any public schematics. For per
> the DT settings(interrupt is configured LOW LEVEL trigger), so PMIC_nINT
> should be configured as PULL UP, per NXP reference design, there is no
> on-board resistors for PMIC_nINT, it counts on SoC internal PULL. So I think
> these boards are also having issues. But I use phase "there might be" in
> commit log.
>
> The last two patches, I think the PAD settings are wrong, but not sure
> they have interrupt storm issues, so just correct the settings.
>
> For imx8mp-skov-reva.dtsi, I am not sure whether it needs same fix, so
> not touch it.
>
> [1] https://lore.kernel.org/all/20260323105858.GA2185714@killaraus.ideasonboard.com/
> [2] https://lore.kernel.org/all/20260324194353.GB2352505@killaraus.ideasonboard.com/
>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
> Changes in V2:
> - Fix more boards
> - Drop preceding zero
> - Link to v1: https://lore.kernel.org/all/20260324-imx8mp-dts-fix-v1-1-df0eb2f62543@nxp.com/
>
> ---
> Peng Fan (12):
> arm64: dts: imx8mp-debix-model-a: Correct PAD settings for PMIC_nINT
> arm64: dts: imx8mp-debix-som-a: Correct PAD settings for PMIC_nINT
> arm64: dts: imx8mp-navqp: Correct PAD settings for PMIC_nINT
> arm64: dts: imx8mp-ab2: Correct PAD settings for PMIC_nINT
This one squash to 7adad1a52c420 ("arm64: dts: imx8mp-ab2: add support for NXP i.MX8MP audio board (version 2)")
because it is still in my tree.
> arm64: dts: imx8mp-icore-mx8mp: Correct PAD settings for PMIC_nINT
> arm64: dts: imx8mp-edm-g: Correct PAD settings for PMIC_nINT
> arm64: dts: imx8mp-aristainetos3a-som-v1: Correct PAD settings for PMIC_nINT
> arm64: dts: imx8mp-nitrogen-som: Correct PAD settings for PMIC_nINT
> arm64: dts: imx8mp-sr-som: Correct PAD settings for PMIC_nINT
> arm64: dts: imx8mp-ultra-mach-sbc: Correct PAD settings for PMIC_nINT
> arm64: dts: imx8mp-dhcom-som: Correct PAD settings for PMIC_nINT
> arm64: dts: imx8mp-data-modul-edm-sbc: Correct PAD settings for PMIC_nINT
Other apply to 7.0 fixes branch. Thanks
Frank
>
> arch/arm64/boot/dts/freescale/imx8mp-ab2.dts | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-aristainetos3a-som-v1.dtsi | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc.dts | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-debix-model-a.dts | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-debix-som-a-bmb-08.dts | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-debix-som-a.dtsi | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-edm-g.dtsi | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-icore-mx8mp.dtsi | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-navqp.dts | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-nitrogen-som.dtsi | 2 +-
> arch/arm64/boot/dts/freescale/imx8mp-sr-som.dtsi | 4 ++--
> arch/arm64/boot/dts/freescale/imx8mp-ultra-mach-sbc.dts | 4 ++--
> 13 files changed, 15 insertions(+), 15 deletions(-)
> ---
> base-commit: 66ba480978ce390e631e870b740a3406e3eb6b01
> change-id: 20260326-imx8mp-dts-fix-v2-89ede7320c6a
>
> Best regards,
> --
> Peng Fan <peng.fan@nxp.com>
>