From adbf02998b2e21e3f055f72fe2daa86260f03637 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 18 Jan 2018 10:43:43 +0100 Subject: gpio: Documentation update Update a slew of documentation files with the latest changes in the API/ABI. Again stress that sysfs is deprecated. Add all new flags and clean up and move some text. Signed-off-by: Linus Walleij --- Documentation/gpio/driver.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation/gpio/driver.txt') diff --git a/Documentation/gpio/driver.txt b/Documentation/gpio/driver.txt index d8de1c7de85a..3392a0fd4c23 100644 --- a/Documentation/gpio/driver.txt +++ b/Documentation/gpio/driver.txt @@ -88,6 +88,10 @@ ending up in the pin control back-end "behind" the GPIO controller, usually closer to the actual pins. This way the pin controller can manage the below listed GPIO configurations. +If a pin controller back-end is used, the GPIO controller or hardware +description needs to provide "GPIO ranges" mapping the GPIO line offsets to pin +numbers on the pin controller so they can properly cross-reference each other. + GPIOs with debounce support --------------------------- -- cgit v1.2.3