[PATCH v2] ARM: bcm2835: Add names for the Raspberry Pi GPIO lines

[Eric Anholt]

Linus Walleij <linus.walleij at linaro.org> writes:

> On Tue, Oct 18, 2016 at 10:44 PM, Gottfried Haider
> <gottfried.haider at gmail.com wrote:
>
>> Regarding the proposed format using the header pin numbers: From what I've
>> seen in terms of existing educational materials, it seems the overwhelming
>> majority ends up using GPIO numbers instead of physical pin header
>> numbering. (e.g. [1] [2])
>
> What does that number mean? If you are referring to the global
> GPIO numberspace it is obsolete and just reflecting the fact that
> people up until now was referring to Linux-internal GPIO numbers.

The number within the SOC's GPIOs.  Until the 8-line expander that's
been hung off the SOC GPIOs in the Pi3, they were the only GPIOs in the
system.
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