Re: [PATCH 5/7] gpio: ppc44x: Convert GPIO to generic MMIO

On Wed, Jul 29, 2026 at 3:55 AM Madhavan Srinivasan [off-list ref] wrote:

On 6/2/26 2:56 PM, Rosen Penev wrote:

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On Tue Jun 2, 2026 at 12:51 AM PDT, Bartosz Golaszewski wrote:

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On Tue, 2 Jun 2026 07:01:29 +0200, Rosen Penev [off-list ref] said:

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Use gpio_generic_chip_init() to set up the PPC44x GPIO chip
instead of open-coding the basic get, set, locking and state handling.

Keep the PPC44x-specific direction callbacks because they still need to
program ODR and the OSR/TSR registers around the generic data and
direction registers.

Assisted-by: Codex:GPT-5.5
Signed-off-by: Rosen Penev <redacted>
---

...

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@@ -124,10 +102,11 @@ static int
  ppc4xx_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
  {
    struct ppc4xx_gpio_chip *chip = gpiochip_get_data(gc);
+   struct gpio_generic_chip *gen_gc = &chip->chip;
    struct ppc4xx_gpio __iomem *regs = chip->regs;
    unsigned long flags;

-   spin_lock_irqsave(&chip->lock, flags);
+   gpio_generic_chip_lock_irqsave(gen_gc, flags);

If you're already doing it, can you use lock guards too?

Sure. btw, I avoided placing

Do you have plan to address this comment in v2

Yeah I have it fixed locally.

I'm not sure if this has to do through the PPC or GPIO tree.

Maddy

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https://lore.kernel.org/all/20260517063754.21819-1-rosenp@gmail.com/ (local)

in the beginning of the series. My thinking is that's for older kernels.
I believe either the generic API or devm_gpiochip_add_data fixes this.

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Bart