linux-kernel - Re: linux-next: manual merge of the pinctrl tree with the gpio-intel tree

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Date:   Mon, 2 May 2022 17:42:34 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Fabien Dessenne <fabien.dessenne@...s.st.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: manual merge of the pinctrl tree with the gpio-intel tree

On Mon, May 2, 2022 at 5:39 PM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> Today's linux-next merge of the pinctrl tree got a conflict in:
>
>   drivers/pinctrl/stm32/pinctrl-stm32.c
>
> between commit:
>
>   bb949ed9b16b ("pinctrl: stm32: Switch to use for_each_gpiochip_node() helper")
>
> from the gpio-intel tree and commit:
>
>   c954531bc5d8 ("pinctrl: stm32: improve bank clocks management")
>
> from the pinctrl tree.
>
> I fixed it up (I think, see below) and can carry the fix as
> necessary. This is now fixed as far as linux-next is concerned, but any
> non trivial conflicts should be mentioned to your upstream maintainer
> when your tree is submitted for merging.  You may also want to consider
> cooperating with the maintainer of the conflicting tree to minimise any
> particularly complex conflicts.

Thanks for the fix. I think the best course of action is that Linus W.
can pull the same branch that GPIO tree has into the pin control tree
and resolve that, because the drivers touched are all pin control
drivers while the core part of GPIO subsystem was updated.

> --
> Cheers,
> Stephen Rothwell
>
> diff --cc drivers/pinctrl/stm32/pinctrl-stm32.c
> index 7aecd0efde07,b308e7bb7487..000000000000
> --- a/drivers/pinctrl/stm32/pinctrl-stm32.c
> +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
> @@@ -1544,34 -1508,44 +1506,38 @@@ int stm32_pctl_probe(struct platform_de
>                 return -ENOMEM;
>
>         i = 0;
>  -      for_each_available_child_of_node(np, child) {
>  +      for_each_gpiochip_node(dev, child) {
>                 struct stm32_gpio_bank *bank = &pctl->banks[i];
>  +              struct device_node *np = to_of_node(child);
>
>  -              if (of_property_read_bool(child, "gpio-controller")) {
>  -                      bank->rstc = of_reset_control_get_exclusive(child,
>  -                                                                  NULL);
>  -                      if (PTR_ERR(bank->rstc) == -EPROBE_DEFER) {
>  -                              of_node_put(child);
>  -                              return -EPROBE_DEFER;
>  -                      }
>  -
>  -                      bank->clk = of_clk_get_by_name(child, NULL);
>  -                      if (IS_ERR(bank->clk)) {
>  -                              if (PTR_ERR(bank->clk) != -EPROBE_DEFER)
>  -                                      dev_err(dev,
>  -                                              "failed to get clk (%ld)\n",
>  -                                              PTR_ERR(bank->clk));
>  -                              of_node_put(child);
>  -                              return PTR_ERR(bank->clk);
>  -                      }
>  -                      i++;
>  +              bank->rstc = of_reset_control_get_exclusive(np, NULL);
>  +              if (PTR_ERR(bank->rstc) == -EPROBE_DEFER) {
>  +                      fwnode_handle_put(child);
>  +                      return -EPROBE_DEFER;
>                 }
>  -      }
>
>  -      for_each_available_child_of_node(np, child) {
>  -              if (of_property_read_bool(child, "gpio-controller")) {
>  -                      ret = stm32_gpiolib_register_bank(pctl, child);
>  -                      if (ret) {
>  -                              of_node_put(child);
>  +              bank->clk = of_clk_get_by_name(np, NULL);
>  +              if (IS_ERR(bank->clk)) {
>  +                      if (PTR_ERR(bank->clk) != -EPROBE_DEFER)
>  +                              dev_err(dev, "failed to get clk (%ld)\n", PTR_ERR(bank->clk));
>  +                      fwnode_handle_put(child);
>  +                      return PTR_ERR(bank->clk);
>  +              }
>  +              i++;
>  +      }
>
>  -                              for (i = 0; i < pctl->nbanks; i++)
>  -                                      clk_disable_unprepare(pctl->banks[i].clk);
>  +      for_each_gpiochip_node(dev, child) {
>  +              ret = stm32_gpiolib_register_bank(pctl, child);
>  +              if (ret) {
>  +                      fwnode_handle_put(child);
> +
>  -                              return ret;
>  -                      }
> ++                      for (i = 0; i < pctl->nbanks; i++)
> ++                              clk_disable_unprepare(pctl->banks[i].clk);
> +
>  -                      pctl->nbanks++;
>  +                      return ret;
>                 }
>  +
>  +              pctl->nbanks++;
>         }
>
>         dev_info(dev, "Pinctrl STM32 initialized\n");



-- 
With Best Regards,
Andy Shevchenko