On 1/26/18 7:01 AM, Linus Walleij wrote:
This is a feature not a bug. It encourages people not to
depend on the global GPIO numberspace.
Just set it to -1.
If I change it to -1, then I think I'm going to break every existing MSM
platform that depends on the base address being 0, because then every
MSM driver will have a non-zero base, and none of the existing drivers
register more than one GPIO device.
So how about this:
static int base = 0;
chip->base = base;
base = -1;
This way, existing code works as before. If any driver registers two
GPIO devices, the first one will get a base of 0, and the second one
will get some other base.
gpiochip_find_base: found new base at 437
(...)
gpiochip_find_base: found new base at 362
These are awesome bases, just beautiful. Use this.
If you don't like seeing GPIO base numbers like this: use things
like the chardev and the tools in tools/gpio or libgpiod when
developing, and you will never see them. They should not make
a difference anyway.
Can you tell me more about the chardev? I've always been using "echo X
> /sys/class/gpio/export", so I guess that's not the right way to do
things.
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