Re: [PATCH] imx93_frdm: clear and mask TCPC interrupts

[Thomas Petazzoni <thomas.petazzoni@bootlin.com>]

Hello Francesco,

On Sat, 03 Jan 2026 22:22:12 +0100
Francesco Valla <francesco@valla.it> wrote:

> One of the two on-board PTN5110 TCPC USB Power Delivery controller on
> the i.MX93 FRDM board shares its interrupt line whith the PCAL6524 power
> controller (GPIO3-27). Since the PTN5110 starts after POR with the
> interrupts enabled, this can lead to an interrupt storm on OS startup if
> only the driver for the PCAL6524 is loaded, because none is servicing
> (and clearing) the interrupt requests from the PTN5110.
> 
> Maks and clear all interrupts as part uring board initialization; they
> can be re-enabled later by a proper OS driver if required.
> 
> Co-developed-by: Joseph Guo <qijian.guo@nxp.com>
> Signed-off-by: Francesco Valla <francesco@valla.it>

Thanks a lot for this patch, I confirm it fixes the issue I was having
with the kernel experiencing spurious IRQs. I don't really have any
comments on the technical approach: it's never nice to poke into a
device registers directly from a board file and outside of the driver
for that specific device, but I don't know if there's a better approach
for this specific problem.

So in any case:

Tested-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

Thanks again!

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com