On Mon, Oct 19, 2015 at 7:43 AM, Pramod Kumar [off-list ref] wrote:

Add ngpios property to the gpio controller's DT node so that controller
driver extracts total number of gpio lines present in controller
from DT and removes dependency on driver.

Signed-off-by: Pramod Kumar <redacted>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>

(...)

+- ngpios:
+    Total number of GPIOs the controller provides

This description is wrong. The number of GPIOs the controller *provides*
is to be determined by the compatible-string.

ngpios is used to restrict the number of lines *used* or *routed* from
the number *available*. (I hope that is what the code does as well.)
Such as if 12 GPIOs are used of the 32 available on 32bits in a
register.

Update this description to say what it really means.

Yours,
Linus Walleij