[PATCH 9/9] gpiolib: Add gpio name information to /sys/kernel/debug/gpio

[Markus Pargmann]

On Tue, Jul 28, 2015 at 11:58:42AM +0200, Johan Hovold wrote:
> On Fri, Jul 17, 2015 at 11:32:50AM +0200, Markus Pargmann wrote:
> > Add some information about gpio names to the debugfs gpio file. name and
> > label of a GPIO are then displayed next to each other. This way it is
> > easy to see what the real name of GPIO is and what the driver requested
> > it for.
> > 
> > Signed-off-by: Markus Pargmann <mpa at pengutronix.de>
> > ---
> >  drivers/gpio/gpiolib.c | 11 ++++++++---
> >  1 file changed, 8 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> > index dcac3bcf21dd..0f1d1f5faf5d 100644
> > --- a/drivers/gpio/gpiolib.c
> > +++ b/drivers/gpio/gpiolib.c
> > @@ -2308,14 +2308,19 @@ static void gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip)
> >  	int			is_irq;
> >  
> >  	for (i = 0; i < chip->ngpio; i++, gpio++, gdesc++) {
> > -		if (!test_bit(FLAG_REQUESTED, &gdesc->flags))
> > +		if (!test_bit(FLAG_REQUESTED, &gdesc->flags)) {
> > +			if (gdesc->name) {
> > +				seq_printf(s, " gpio-%-3d (%-20.20s)\n",
> > +					   gpio, gdesc->name);
> > +			}
> 
> So now we'd no longer just be listing requested gpios, but on a similar
> format to how requested ones used to be represented.

Better suggestions on how to display those extra information in debugfs?

> 
> Then there's the debugfs as ABI discussion...

I didn't consider debugfs as ABI as I thought it is just for debugging purposes?

Best regards,

Markus

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