Re: [PATCH] pinctrl: qcom: qdf2xxx: expose only some GPIO pins

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Thu, Jun 29, 2017 at 9:37 PM, Timur Tabi <timur@xxxxxxxxxxxxxx> wrote:
> On 06/23/2017 07:33 AM, Linus Walleij wrote:
>>
>> I think using "lsgpio" fron tools/gpio/lsgpio.c is better to inspect
>> the available GPIOs.
>>
>> If you haven't tested the GPIO tools, please try it out.
>
>
> Unfortunately, this tool isn't very useful:
>
> $ sudo ./lsgpio
> GPIO chip: gpiochip0, "QCOM8001:00", 150 GPIO lines
>         line  0: unnamed unused [output]
>         line  1: unnamed unused [output]
>         line  2: unnamed unused [output]

They can be given reasonable names using the line-names
property in the DTS file, preferably the top-level file.
arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
is a good example.

Do the same with your target board and things will
be very much more helpful.

gpio-hammer can help you test a line (try it with
a LED) and gpio-event-mon can help you listen
at a key for example.

Yours,
Linus Walleij
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