Re: [PATCH v2 02/12] arm64: dts: imx8mp-debix-som-a: Correct PAD settings for PMIC_nINT

[Kieran Bingham]

Quoting Peng Fan (OSS) (2026-03-26 07:28:06)
> From: Peng Fan <peng.fan@xxxxxxx>
> 
> With commit 5d0efaf47ee90 ("regulator: pca9450: Correct interrupt type"),
> there is interrupt storm for i.MX8MP DEBIX SOM A. Need to set PAD
> PUE and PU together to make pull up work properly.
> 
> Fixes: 21baf0b47f81b ("arm64: dts: freescale: Add DEBIX SOM A and SOM A I/O Board support")
> Reported-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Closes: https://lore.kernel.org/all/20260323105858.GA2185714@xxxxxxxxxxxxxxxxxxxxxxxxxx/
> Reported-by: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
> Closes: https://lore.kernel.org/imx/20260324194353.GB2352505@xxxxxxxxxxxxxxxxxxxxxxxxxx/T/#m9a07fdc75496369a7d76d52c5e34ed140dcabfe3


Much quieter, thank you.

Tested with

 watch -n0.5 cat /proc/interrupts

...
 28:          0          0          0          0    GICv3  23 Level     arm-pmu
 29:          0          0          0          0    GICv3 130 Level     imx8_ddr_perf_pmu
 35:          0          0          0          0 gpio-mxc   3 Level     pca9450-irq
137:          0          0          0          0 gpio-mxc   3 Edge      hym8563
200:        919          0          0          0    GICv3  67 Level     30a20000.i2c
201:          5          0          0          0    GICv3  68 Level     30a30000.i2c
202:          5          0          0          0    GICv3  69 Level     30a40000.i2c
203:        157          0          0          0    GICv3  70 Level     30a50000.i2c
204:          0          0          0          0    GICv3  57 Level     38008000.gpu
207:          0          0          0          0    GICv3 180 Level     32f10100.usb
...

And only the timers are increasing (as expected).


Reviewed-by: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>

> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
> ---
>  arch/arm64/boot/dts/freescale/imx8mp-debix-som-a-bmb-08.dts | 2 +-
>  arch/arm64/boot/dts/freescale/imx8mp-debix-som-a.dtsi       | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-debix-som-a-bmb-08.dts b/arch/arm64/boot/dts/freescale/imx8mp-debix-som-a-bmb-08.dts
> index 04619a7229065be496611128ecf6848c9dd7102c..1471ff361b54cba05bb0e0734aa6e8d149309025 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-debix-som-a-bmb-08.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-debix-som-a-bmb-08.dts
> @@ -499,7 +499,7 @@ MX8MP_IOMUXC_SAI1_RXD1__GPIO4_IO03          0x140
>  
>         pinctrl_pmic: pmicgrp {
>                 fsl,pins = <
> -                       MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03             0x41
> +                       MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03             0x1c0
>                 >;
>         };
>  
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-debix-som-a.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-debix-som-a.dtsi
> index 91094c2277443c1585dfb7f31dccfb27aa1bcc8d..b31e8fe95ca74500fdc459aecfeb3f4b573f4244 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-debix-som-a.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-debix-som-a.dtsi
> @@ -241,7 +241,7 @@ MX8MP_IOMUXC_I2C4_SDA__I2C4_SDA                     0x400001c3
>  
>         pinctrl_pmic: pmicgrp {
>                 fsl,pins = <
> -                       MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03             0x41
> +                       MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03             0x1c0
>                 >;
>         };
>  
> 
> -- 
> 2.37.1
>