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authorLinus Walleij <linus.walleij@linaro.org>2018-06-01 13:21:27 +0200
committerLinus Walleij <linus.walleij@linaro.org>2018-06-18 07:55:30 +0200
commit90b39402e9f31c4aab48dc1a43d85a724065793f (patch)
tree2c359988d15ffb3dfa8754f20f19e1ad9b77fff9 /include/linux/gpio
parentf3a049e784b337e9fa08f2f9046c955cc80af535 (diff)
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gpio: Add API to explicitly name a consumer
The GPIO (descriptor) API registers a "label" naming what is currently using the GPIO line. Typically this is taken from things like the device tree node, so "reset-gpios" will result in he line being labeled "reset". The technical effect is pretty much zero: the use is for debug and introspection, such as "lsgpio" and debugfs files. However sometimes the user want this cuddly feeling of listing all GPIO lines and seeing exactly what they are for and it gives a very fulfilling sense of control. Especially in the cases when the device tree node doesn't provide a good name, or anonymous GPIO lines assigned just to "gpios" in the device tree because the usage is implicit. For these cases it may be nice to be able to label the line directly and explicitly. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/gpio')
-rw-r--r--include/linux/gpio/consumer.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 243112c7fa7d..e8aaf34dd65d 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -145,6 +145,7 @@ int gpiod_is_active_low(const struct gpio_desc *desc);
int gpiod_cansleep(const struct gpio_desc *desc);
int gpiod_to_irq(const struct gpio_desc *desc);
+void gpiod_set_consumer_name(struct gpio_desc *desc, const char *name);
/* Convert between the old gpio_ and new gpiod_ interfaces */
struct gpio_desc *gpio_to_desc(unsigned gpio);
@@ -467,6 +468,12 @@ static inline int gpiod_to_irq(const struct gpio_desc *desc)
return -EINVAL;
}
+static inline void gpiod_set_consumer_name(struct gpio_desc *desc, const char *name)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+}
+
static inline struct gpio_desc *gpio_to_desc(unsigned gpio)
{
return ERR_PTR(-EINVAL);