Re: [PATCH] gpiolib: debugfs: display gpios requested as irq only

From: Johan Hovold
Date: Mon May 18 2015 - 07:02:28 EST


On Fri, May 15, 2015 at 04:25:21PM +0300, grygorii.strashko@xxxxxxxxxx wrote:
> From: Grygorii Strashko <grygorii.strashko@xxxxxxxxxx>
>
> Now GPIOs, wich are requested as IRQ only, will not be displayed
> through GPIO debugfs. For example:
> # cat /proc/interrupts
> CPU0 CPU1
> ...
> 209: 0 0 4805d000.gpio 11 Edge 0-0021
>
> # cat /debug/gpio
> ...
> GPIOs 160-191, platform/4805d000.gpio, gpio:
> <--- no info about gpio used as IRQ only here
>
> GPIOs 192-223, platform/48051000.gpio, gpio:
> gpio-203 (vtt_fixed ) out hi
> ...
>
> Hence, improve GPIO debugfs code to show such kind of gpio and print
> IRQ number also. In addition, add marker "requested" for GPIOs wich
> were requested by using gpioX_request().
>
> After this patch sys/kernel/debug/gpio will produce following output:
>
> # cat /debug/gpio
> ...
> GPIOs 160-191, platform/4805d000.gpio, gpio:
> gpio-171 ((null) ) in hi IRQ209
>
> GPIOs 192-223, platform/48051000.gpio, gpio:
> gpio-203 (vtt_fixed ) out hi requested

This is backwards. All gpios *should* be requested. *If* we are to
include not-requested gpios in the debug output, then it is those pins
that need to be marked as not-requested.

The irq-number mapping could perhaps be useful, but it should go in a
separate patch. I'd suggest adding a '-' before the irq-number (e.g.
"IRQ-209").

Thanks,
Johan
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