Hi Linus and Andy,

On Mon, Mar 27, 2023 at 11:39:18PM +0200, Linus Walleij wrote:

On Mon, Mar 27, 2023 at 1:59 PM Andy Shevchenko
[off-list ref] wrote:

quoted

On Mon, Mar 27, 2023 at 9:28 AM Chester Lin [off-list ref] wrote:

quoted

The .data field in struct of_device_id is used as a const member so it's
inappropriate to attach struct s32_pinctrl_soc_info with of_device_id
because some members in s32_pinctrl_soc_info need to be filled by
pinctrl-s32cc at runtime.

For this reason, struct s32_pinctrl_soc_info must be allocated in
pinctrl-s32cc and then create a new struct s32_pinctrl_soc_data in order
to represent const .data in of_device_id. To combine these two structures,
a s32_pinctrl_soc_data pointer is introduced in s32_pinctrl_soc_info.

Besides, use of_device_get_match_data() instead of of_match_device() since
the driver only needs to retrieve the .data from of_device_id.

...

quoted

-static struct s32_pinctrl_soc_info s32_pinctrl_info = {
+static struct s32_pinctrl_soc_data s32_pinctrl_data = {

I'm wondering why it's not const.

But don't resend too quickly, let's wait for Linus to comment on this
and other stuff. It might be that he can amend this when applying.

I don't dare to add const here given the compiler warnings it
can easily spawn.

Chester can you investigate if these can be static const?

You would only need to resend this patch 5/5 because I applied
all the others to lower your patch stack.

Thanks for fixing!
Yours,
Linus Walleij

Thanks for reviewing this patch and Andy's suggestion looks good to me. The
s32_pinctrl_data should be const as well since the 'data' pointer in
of_device_id is declared as const.

Anyway, I have resent a revised 5/5 under the same mail thread:
https://lore.kernel.org/all/20230329041630.8011-1-clin@suse.com/T/#u (local)

It can be compiled by the following two gcc versions without a warning on
drivers/pinctrl/nxp

- aarch64-native:
  - gcc version 7.5.0 (SUSE Linux)  <aarch64-native>

- cross-compilation on x86-64
  - gcc version 13.0.1 20230127 (experimental) [revision ca8fb0096713a8477614ef874f16ba5bf16c48bc] (SUSE Linux)

Thanks!

Regards,
Chester

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