Re: [PATCH] i2c: cpm: Use platform_get_irq() to retrieve interrupt

[Rosen Penev]

On Wed, Jun 3, 2026 at 1:15 AM Christophe Leroy (CS GROUP)
<chleroy@xxxxxxxxxx> wrote:
>
>
>
> Le 03/06/2026 à 02:54, Rosen Penev a écrit :
> > Replace irq_of_parse_and_map() with platform_get_irq() as recommended
> > for device-managed IRQ lookup. Properly propagate any errors returned
> > from platform_get_irq(). irq_of_parse_and_map() requires
> > ire_dispose_mapping(), which is missing.
>
> irq_of_parse_and_map() and platform_get_irq() look pretty different, can
> you give more details on how one can replace the other ? (I don't mean
> this is wrong, just I don't have enough details).
My understanding is the latter is higher level and doesn't require
mapping. Just a request from the platform_device machinery for an irq
that it already mapped.

It also supports -EPROBE_DEFER. Probably not relevant here but could
be some day.
>
> >
> > Assisted-by: opencode:big-pickle
> > Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
> > ---
> >   drivers/i2c/busses/i2c-cpm.c | 6 +++---
> >   1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c
> > index 2cb6a233d313..23679c192edc 100644
> > --- a/drivers/i2c/busses/i2c-cpm.c
> > +++ b/drivers/i2c/busses/i2c-cpm.c
> > @@ -434,9 +434,9 @@ static int cpm_i2c_setup(struct cpm_i2c *cpm)
> >
> >       init_waitqueue_head(&cpm->i2c_wait);
> >
> > -     cpm->irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
> > -     if (!cpm->irq)
> > -             return -EINVAL;
> > +     cpm->irq = platform_get_irq(ofdev, 0);
> > +     if (cpm->irq < 0)
> > +             return cpm->irq;
> >
> >       /* Install interrupt handler. */
> >       ret = request_irq(cpm->irq, cpm_i2c_interrupt, 0, "cpm_i2c",
>