[PATCH V2 1/2] leds: gpio: Add kernel log if devm_fwnode_gpiod_get fails

[Andy Shevchenko]

On Sat, Nov 18, 2023 at 01:42:51PM +0100, Stefan Wahren wrote:
> In case leds-gpio fails to get the GPIO from the DT (e.g. the GPIO is
> already requested) the driver doesn't provide any helpful error log:
> 
>     leds-gpio: probe of leds failed with error -16
> 
> So add a new error log in case devm_fwnode_gpiod_get() fails.

...

>  		led.gpiod = devm_fwnode_gpiod_get(dev, child, NULL, GPIOD_ASIS,
>  						  NULL);
>  		if (IS_ERR(led.gpiod)) {
> +			dev_err_probe(dev, PTR_ERR(led.gpiod), "Failed to get gpio '%pfw'\n",
> +				      child);
>  			fwnode_handle_put(child);
>  			return ERR_CAST(led.gpiod);
>  		}

Thinking more about it. GPIO library already issues bunch of messages.

	"using DT ... for ... GPIO lookup"
	"using lookup tables for GPIO lookup"
	"No GPIO consumer ... found"

Isn't it enough?

-- 
With Best Regards,
Andy Shevchenko