leds-gpio: no GPIO labels (in debugfs)

[Alexander Stein <alexander.stein@systec-electronic.com>]

Hi,

I jut noticed that the used GPIOs for leds-gpio do not have an actual label 
which is visible in debugfs (/sys/kernel/debug/gpio):
> gpiochip4: GPIOs 368-383, parent: spi/spi0.2, mcp23s17, can sleep:
>  gpio-369 P0.1 (?           ) out hi
>  gpio-370 P0.2 (?           ) out lo
>  gpio-371 P0.3 (?           ) out lo
>  gpio-372 P0.4 (?           ) out lo
>  gpio-373 P0.5 (?           ) out lo
>  gpio-374 P0.6 (?           ) out lo

The reason is that the call to devm_get_gpiod_from_child() in 
gpio_leds_create() eventually calls "gpiod_request(desc, NULL);" in 
fwnode_get_named_gpiod. So no label attached to GPIO, hence "?" output.

As we have already a gpiod in create_gpio_led(), devm_gpio_request_one() with 
the proper label is not called.
I don't know much of that code, so what would be needed to have a proper GPIO 
label? And how?

Best regards,
Alexander Stein
-- 
Dipl.-Inf. Alexander Stein
SYS TEC electronic GmbH
alexander.stein@systec-electronic.com

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