Linus Walleij c663e5f567 gpio: support native single-ended hardware drivers ...

Some GPIO controllers has a special hardware bit we can flip
to support open drain / source. This means that on these hardwares
we do not need to emulate OD/OS by setting the line to input
instead of actively driving it high/low. Add an optional vtable
callback to the driver set_single_ended() so that driver can
implement this in hardware if they have it.

We may need a pinctrl_gpio_set_config() call at some point to
propagate this down to a backing pin control device on systems
with split GPIO/pin control.

Reported-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

2016-04-05 16:57:15 +02:00

..

consumer.h

gpio: keep the GPIO line names internal

2015-09-24 10:48:53 -07:00

driver.h

gpio: support native single-ended hardware drivers

2016-04-05 16:57:15 +02:00

machine.h

gpiolib: Add support for removing registered consumer lookup table

2015-07-21 09:21:40 +02:00