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SubjectRe: [PATCH v8 4/6] gpio: gpiolib: Allow free() callback to be overridden
On Fri, 08 Jul 2022 16:52:21 +0100,
Bartosz Golaszewski <brgl@bgdev.pl> wrote:
>
> On Thu, Jul 7, 2022 at 8:24 PM <prabhakar.csengg@gmail.com> wrote:
> >
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> >
> > Allow free() callback to be overridden from irq_domain_ops for
> > hierarchical chips.
> >
> > This allows drivers to free up resources which are allocated during
> > child_to_parent_hwirq()/populate_parent_alloc_arg() callbacks.
> >
> > On Renesas RZ/G2L platform a bitmap is maintained for TINT slots, a slot
> > is allocated in child_to_parent_hwirq() callback which is freed up in free
> > callback hence this override.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> > ---
> > drivers/gpio/gpiolib.c | 9 ++++++---
> > 1 file changed, 6 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> > index bfde94243752..68d9f95d7799 100644
> > --- a/drivers/gpio/gpiolib.c
> > +++ b/drivers/gpio/gpiolib.c
> > @@ -1181,15 +1181,18 @@ static void gpiochip_hierarchy_setup_domain_ops(struct irq_domain_ops *ops)
> > ops->activate = gpiochip_irq_domain_activate;
> > ops->deactivate = gpiochip_irq_domain_deactivate;
> > ops->alloc = gpiochip_hierarchy_irq_domain_alloc;
> > - ops->free = irq_domain_free_irqs_common;
> >
> > /*
> > - * We only allow overriding the translate() function for
> > + * We only allow overriding the translate() and free() functions for
> > * hierarchical chips, and this should only be done if the user
> > - * really need something other than 1:1 translation.
> > + * really need something other than 1:1 translation for translate()
> > + * callback and free if user wants to free up any resources which
> > + * were allocated during callbacks, for example populate_parent_alloc_arg.
> > */
> > if (!ops->translate)
> > ops->translate = gpiochip_hierarchy_irq_domain_translate;
> > + if (!ops->free)
> > + ops->free = irq_domain_free_irqs_common;
> > }
> >
> > static int gpiochip_hierarchy_add_domain(struct gpio_chip *gc)
> > --
> > 2.25.1
> >
>
> Acked-by: Bartosz Golaszewski <brgl@bgdev.pl>
>
> Which tree is this targetting?
>

Given the various dependencies, I've created a stable branch[1] on top
of -rc3, and merged the whole thing into irq/irqchip-next.

Feel free to pull the branch in the GPIO tree as well.

Thanks,

M.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=irq/renesas-irqc

--
Without deviation from the norm, progress is not possible.

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