linux.git/drivers/gpio/gpiolib-devres.c, branch v5.5

gpiolib: introduce fwnode_gpiod_get_index()

2019-10-03T10:04:28+00:00

This introduces fwnode_gpiod_get_index() that iterates through common gpio
suffixes when trying to locate a GPIO within a given firmware node.

We also switch devm_fwnode_gpiod_get_index() to call
fwnode_gpiod_get_index() instead of iterating through GPIO suffixes on
its own.

Reviewed-by: Andy Shevchenko 
Signed-off-by: Dmitry Torokhov 
Link: https://lore.kernel.org/r/20190913032240.50333-3-dmitry.torokhov@gmail.com
Reviewed-by: Mika Westerberg 
Signed-off-by: Linus Walleij

gpiolib: introduce devm_fwnode_gpiod_get_index()

2019-10-03T10:03:58+00:00

devm_fwnode_get_index_gpiod_from_child() is too long, besides the fwnode
in question does not have to be a child of device node. Let's rename it
to devm_fwnode_gpiod_get_index() and keep the old name for compatibility
for now.

Also let's add a devm_fwnode_gpiod_get() wrapper as majority of the
callers need a single GPIO.

Reviewed-by: Andy Shevchenko 
Signed-off-by: Dmitry Torokhov 
Reviewed-by: Mika Westerberg 
Link: https://lore.kernel.org/r/20190913032240.50333-2-dmitry.torokhov@gmail.com
Signed-off-by: Linus Walleij

gpio: devres: Switch to EXPORT_SYMBOL_GPL()

2019-09-11T13:47:39+00:00

Change all exported symbols for managed GPIO functions from
EXPORT_SYMBOL() to EXPORT_SYMBOL_GPL(), like is used for their
non-managed counterparts.

Signed-off-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/20190906084539.21838-5-geert+renesas@glider.be
Signed-off-by: Linus Walleij

gpio: Add devm_gpiod_unhinge()

2018-12-11T01:04:23+00:00

This adds a function named devm_gpiod_unhinge() that removes
the resource management from a GPIO descriptor.

I am not sure if this is the best anglosaxon name for the
function, no other managed resources have an equivalent
currently, but I chose "unhinge" as the closest intuitive
thing I could imagine that fits Rusty Russell's API design
criterions "the obvious use is the correct one" and
"the name tells you how to use it".

The idea came out of a remark from Mark Brown that it should
be possible to handle over management of a resource from
devres to the regulator core, and indeed we can do that.

Signed-off-by: Linus Walleij 
Reviewed-by: Marek Szyprowski 
Tested-by: Marek Szyprowski 
Reviewed-by: Charles Keepax 
Signed-off-by: Mark Brown

gpio: devres: Handle nonexclusive GPIOs

2018-12-11T01:04:17+00:00

When we get a nonexeclusive GPIO descriptor using managed
resources, we should only add it to the list of managed
resources once: on the first user. Augment the
devm_gpiod_get_index() and devm_gpiod_get_from_of_node()
calls to account for this by checking if the descriptor
is already resource managed before we proceed to allocate
a new resource management struct.

Fixes: b0ce7b29bfcd ("regulator/gpio: Allow nonexclusive GPIO access")
Reported-by: Marek Szyprowski 
Signed-off-by: Linus Walleij 
Reviewed-by: Marek Szyprowski 
Tested-by: Marek Szyprowski 
Reviewed-by: Charles Keepax 
Signed-off-by: Mark Brown

gpio: Rename devres implementation file

2018-09-25T07:11:50+00:00

All the other core files are named "gpiolib-" so
let's rename the devres as well so we have some logical
namespacing here.

Signed-off-by: Linus Walleij