It's unclear why it's not a const from day 1. Make the pins member
const in struct group_desc. Update necessary APIs.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/pinctrl/core.c | 2 +-
 drivers/pinctrl/core.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index f2977eb65522..d20e3aad923e 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -642,7 +642,7 @@ static int pinctrl_generic_group_name_to_selector(struct pinctrl_dev *pctldev,
  * Note that the caller must take care of locking.
  */
 int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name,
-			      int *pins, int num_pins, void *data)
+			      const int *pins, int num_pins, void *data)
 {
 	struct group_desc *group;
 	int selector, error;
diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h
index 530370443c19..01ea1ce99fe8 100644
--- a/drivers/pinctrl/core.h
+++ b/drivers/pinctrl/core.h
@@ -203,7 +203,7 @@ struct pinctrl_maps {
  */
 struct group_desc {
 	const char *name;
-	int *pins;
+	const int *pins;
 	int num_pins;
 	void *data;
 };
@@ -222,7 +222,7 @@ struct group_desc *pinctrl_generic_get_group(struct pinctrl_dev *pctldev,
 					     unsigned int group_selector);
 
 int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name,
-			      int *gpins, int ngpins, void *data);
+			      const int *pins, int num_pins, void *data);
 
 int pinctrl_generic_remove_group(struct pinctrl_dev *pctldev,
 				 unsigned int group_selector);
-- 
2.43.0.rc1.1.gbec44491f096

Hi Andy,

On Tue, Nov 28, 2023 at 9:04 PM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
> It's unclear why it's not a const from day 1. Make the pins member
> const in struct group_desc. Update necessary APIs.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Thanks for your patch!

> --- a/drivers/pinctrl/core.c
> +++ b/drivers/pinctrl/core.c
> @@ -642,7 +642,7 @@ static int pinctrl_generic_group_name_to_selector(struct pinctrl_dev *pctldev,
>   * Note that the caller must take care of locking.
>   */
>  int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name,
> -                             int *pins, int num_pins, void *data)
> +                             const int *pins, int num_pins, void *data)
>  {
>         struct group_desc *group;
>         int selector, error;
> diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h
> index 530370443c19..01ea1ce99fe8 100644
> --- a/drivers/pinctrl/core.h
> +++ b/drivers/pinctrl/core.h
> @@ -203,7 +203,7 @@ struct pinctrl_maps {
>   */
>  struct group_desc {
>         const char *name;
> -       int *pins;
> +       const int *pins;
>         int num_pins;
>         void *data;
>  };
> @@ -222,7 +222,7 @@ struct group_desc *pinctrl_generic_get_group(struct pinctrl_dev *pctldev,
>                                              unsigned int group_selector);
>
>  int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name,
> -                             int *gpins, int ngpins, void *data);
> +                             const int *pins, int num_pins, void *data);
>
>  int pinctrl_generic_remove_group(struct pinctrl_dev *pctldev,
>                                  unsigned int group_selector);

Probably this is also the right moment to change all of these to arrays
of unsigned ints?  Else you will have mixed int/unsigned int after
"[PATCH v3 13/22] pinctrl: core: Embed struct pingroup into struct
group_desc", and purely unsigned int after "[PATCH v3 22/22] pinctrl:
core: Remove unused members from struct group_desc".

The Renesas pinctrl drivers already pass arrays of unsigned ints.
Some other drivers still use arrays of ints, though.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

On Wed, Nov 29, 2023 at 12:21:45PM +0100, Geert Uytterhoeven wrote:
> On Tue, Nov 28, 2023 at 9:04 PM Andy Shevchenko
> <andriy.shevchenko@linux.intel.com> wrote:
> > It's unclear why it's not a const from day 1. Make the pins member
> > const in struct group_desc. Update necessary APIs.

...

> >  int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name,
> > -                             int *gpins, int ngpins, void *data);
> > +                             const int *pins, int num_pins, void *data);
> >
> >  int pinctrl_generic_remove_group(struct pinctrl_dev *pctldev,
> >                                  unsigned int group_selector);
> 
> Probably this is also the right moment to change all of these to arrays
> of unsigned ints?  Else you will have mixed int/unsigned int after
> "[PATCH v3 13/22] pinctrl: core: Embed struct pingroup into struct
> group_desc", and purely unsigned int after "[PATCH v3 22/22] pinctrl:
> core: Remove unused members from struct group_desc".

Hmm... Can it be done later?

I can, of course try to change the parameter here to be unsigned, but it most
likely fail the build for those drivers means need more patches, more delay to
this series.

Linus?

-- 
With Best Regards,
Andy Shevchenko

On Wed, Nov 29, 2023 at 03:41:55PM +0200, Andy Shevchenko wrote:
> On Wed, Nov 29, 2023 at 12:21:45PM +0100, Geert Uytterhoeven wrote:
> > On Tue, Nov 28, 2023 at 9:04 PM Andy Shevchenko
> > <andriy.shevchenko@linux.intel.com> wrote:
> > > It's unclear why it's not a const from day 1. Make the pins member
> > > const in struct group_desc. Update necessary APIs.

...

> > >  int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name,
> > > -                             int *gpins, int ngpins, void *data);
> > > +                             const int *pins, int num_pins, void *data);
> > >
> > >  int pinctrl_generic_remove_group(struct pinctrl_dev *pctldev,
> > >                                  unsigned int group_selector);
> > 
> > Probably this is also the right moment to change all of these to arrays
> > of unsigned ints?  Else you will have mixed int/unsigned int after
> > "[PATCH v3 13/22] pinctrl: core: Embed struct pingroup into struct
> > group_desc", and purely unsigned int after "[PATCH v3 22/22] pinctrl:
> > core: Remove unused members from struct group_desc".
> 
> Hmm... Can it be done later?
> 
> I can, of course try to change the parameter here to be unsigned, but it most
> likely fail the build for those drivers means need more patches, more delay to
> this series.
> 
> Linus?

On the first glance updating API here does not fail the build.
Lemme incorporate this into v4.

Meanwhile the drivers I left untouched, it might be separate changes
to convert from int to const unsigned int.

-- 
With Best Regards,
Andy Shevchenko

Hi Andy,

On Wed, Nov 29, 2023 at 3:23 PM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
> On Wed, Nov 29, 2023 at 03:41:55PM +0200, Andy Shevchenko wrote:
> > On Wed, Nov 29, 2023 at 12:21:45PM +0100, Geert Uytterhoeven wrote:
> > > On Tue, Nov 28, 2023 at 9:04 PM Andy Shevchenko
> > > <andriy.shevchenko@linux.intel.com> wrote:
> > > > It's unclear why it's not a const from day 1. Make the pins member
> > > > const in struct group_desc. Update necessary APIs.
>
> ...
>
> > > >  int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name,
> > > > -                             int *gpins, int ngpins, void *data);
> > > > +                             const int *pins, int num_pins, void *data);
> > > >
> > > >  int pinctrl_generic_remove_group(struct pinctrl_dev *pctldev,
> > > >                                  unsigned int group_selector);
> > >
> > > Probably this is also the right moment to change all of these to arrays
> > > of unsigned ints?  Else you will have mixed int/unsigned int after
> > > "[PATCH v3 13/22] pinctrl: core: Embed struct pingroup into struct
> > > group_desc", and purely unsigned int after "[PATCH v3 22/22] pinctrl:
> > > core: Remove unused members from struct group_desc".
> >
> > Hmm... Can it be done later?
> >
> > I can, of course try to change the parameter here to be unsigned, but it most
> > likely fail the build for those drivers means need more patches, more delay to
> > this series.
> >
> > Linus?
>
> On the first glance updating API here does not fail the build.

That's what I had expected, as drivers already pass int or unsigned int
arrays anyway.

> Lemme incorporate this into v4.

Thanks!

> Meanwhile the drivers I left untouched, it might be separate changes
> to convert from int to const unsigned int.

Sounds fine to me.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds