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.

quoted

gpiochip_find_base: found new base at 437

(...)

quoted

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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