Re: [PATCH] arm64: dts: imx8mp-debix-model-a: Correct PAD settings for pmicirqgrp

Kieran Bingham
2026-03-24T17:38:18Z

Quoting Laurent Pinchart (2026-03-24 09:38:50)
> Hi Peng,
>
> Thank you for the patch.
>
> On Tue, Mar 24, 2026 at 11:16:13AM +0800, Peng Fan (OSS) wrote:
> > From: Peng Fan <peng.fan@nxp.com>
> >
> > With commit 5d0efaf47ee90 ("regulator: pca9450: Correct interrupt type"),
> > 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.
> >
> > Fixes: c86d350aae68e ("arm64: dts: Add device tree for the Debix Model A Board")
> > Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > Closes: https://lore.kernel.org/all/20260323105858.GA2185714@killaraus.ideasonboard.com/
> > Signed-off-by: Peng Fan <peng.fan@nxp.com>
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>
> Frank, would you be able to handle this as a v7.0 regression fix ?
>
> I think the same is needed for imx8mp-debix-som-a.dtsi, but I can't
> confirm it as I don't have the schematics for the SoM, neither do I have
> access to the board.
>
> Dan, Kieran, Stefan, could one of you check if you get an interrupt
> storm from the PMIC on v7.0 ?

Confirmed:
35: 83626 0 0 0 gpio-mxc 3 Level pca9450-irq

and

200: 270180 0 0 0 GICv3 67 Level 30a20000.i2c
...
200: 400925 0 0 0 GICv3 67 Level 30a20000.i2c
...

increasing rapidly on the debix-som.

I started out on the linux-media branches which were 7.0-rc2 based, and
this didn't happen but cherry-picking in 5d0efaf47ee90 certainly causes
this issue to occur on my board.

--
Kieran

>
> > ---
> > arch/arm64/boot/dts/freescale/imx8mp-debix-model-a.dts | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mp-debix-model-a.dts b/arch/arm64/boot/dts/freescale/imx8mp-debix-model-a.dts
> > index 9422beee30b29c5a551b08476c80fbff96af3439..df7489587e48ed0c678f11291f6f2b77082ade95 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mp-debix-model-a.dts
> > +++ b/arch/arm64/boot/dts/freescale/imx8mp-debix-model-a.dts
> > @@ -440,7 +440,7 @@ MX8MP_IOMUXC_SAI5_RXC__I2C6_SDA 0x400001c3
> >
> > pinctrl_pmic: pmicirqgrp {
> > fsl,pins = <
> > - MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03 0x41
> > + MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03 0x000001c0