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authorLinus Walleij <linus.walleij@linaro.org>2018-12-06 15:43:46 +0300
committerMark Brown <broonie@kernel.org>2018-12-11 04:04:23 +0300
commit891ddbc79a61eb5b919cf56202ecaf7259878cb2 (patch)
treee4b1a683a2b5761d77b4525368f251897644b0a6 /include/linux/gpio/consumer.h
parentcb28ee388e465a956b05ada682f9ef90e776a9b7 (diff)
downloadlinux-891ddbc79a61eb5b919cf56202ecaf7259878cb2.tar.xz
gpio: Add devm_gpiod_unhinge()
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 <linus.walleij@linaro.org> Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/gpio/consumer.h')
-rw-r--r--include/linux/gpio/consumer.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 348885f2f3d3..8aebcf822082 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -104,6 +104,7 @@ struct gpio_descs *__must_check
devm_gpiod_get_array_optional(struct device *dev, const char *con_id,
enum gpiod_flags flags);
void devm_gpiod_put(struct device *dev, struct gpio_desc *desc);
+void devm_gpiod_unhinge(struct device *dev, struct gpio_desc *desc);
void devm_gpiod_put_array(struct device *dev, struct gpio_descs *descs);
int gpiod_get_direction(struct gpio_desc *desc);
@@ -249,6 +250,15 @@ static inline void gpiod_put(struct gpio_desc *desc)
WARN_ON(1);
}
+static inline void devm_gpiod_unhinge(struct device *dev,
+ struct gpio_desc *desc)
+{
+ might_sleep();
+
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+}
+
static inline void gpiod_put_array(struct gpio_descs *descs)
{
might_sleep();