gpio: Pass GPIO label down to gpiod_request

Currently all users of fwnode_get_named_gpiod() have no way to
specify a label for the GPIO. So GPIOs listed in debugfs are shown
with label "?". With this change a proper label is used.

Also adjust all users so they can pass a label, properly retrieved
from device tree properties.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 8 insertions, 4 deletions

diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 930d10049d8d..80bad7ebde04 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -136,11 +136,13 @@ struct fwnode_handle;
 
 struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
                                          const char *propname,
-                                         enum gpiod_flags dflags);
+                                         enum gpiod_flags dflags,
+                                         const char *label);
 struct gpio_desc *devm_get_gpiod_from_child(struct device *dev,
                                             const char *con_id,
                                             struct fwnode_handle *child,
-                                            enum gpiod_flags flags);
+                                            enum gpiod_flags flags,
+                                            const char *label);
 #else /* CONFIG_GPIOLIB */
 
 static inline int gpiod_count(struct device *dev, const char *con_id)
@@ -416,7 +418,8 @@ struct fwnode_handle;
 static inline
 struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
                                          const char *propname,
-                                         enum gpiod_flags dflags)
+                                         enum gpiod_flags dflags,
+                                         const char *label)
 {
         return ERR_PTR(-ENOSYS);
 }
@@ -425,7 +428,8 @@ static inline
 struct gpio_desc *devm_get_gpiod_from_child(struct device *dev,
                                             const char *con_id,
                                             struct fwnode_handle *child,
-                                            enum gpiod_flags flags)
+                                            enum gpiod_flags flags,
+                                            const char *label)
 {
         return ERR_PTR(-ENOSYS);
 }