Re: [PATCH RFC 1/6] ARM: pxa: Convert Spitz OHCI to GPIO descriptors

[Andy Shevchenko]

On Sun, Sep 24, 2023 at 06:42:54PM +0200, Duje Mihanović wrote:
> Sharp's Spitz board still uses the legacy GPIO interface for controlling
> a GPIO pin related to the USB host controller.
> 
> Convert this function to use the new GPIO descriptor interface.

...

> +	pxa_ohci->usb_host = gpiod_get(&pdev->dev, "usb-host", GPIOD_OUT_LOW);
> +	if (IS_ERR(pxa_ohci->usb_host)) {
> +		dev_warn(&pdev->dev, "failed to get USB host GPIO with %d\n",
> +				(int) pxa_ohci->usb_host);

Casting is no go in 99.9% cases in printf(), so use proper specifier.
Hint: Nice looking message can be obtained by using %pe.

> +		pxa_ohci->usb_host = NULL;

Instead, call for _optional() API.

> +	}

...

> +	if (pxa_ohci->usb_host)
> +		gpiod_put(pxa_ohci->usb_host);

Linus, Bart, do we have misdesigned _optinal() GPIO APIs?

In GPIOLIB=n, the above requires that redundant check. Shouldn't we replace
gpiod_put() stub to be simply no-op?

-- 
With Best Regards,
Andy Shevchenko