leds: enable support for blink_set() platform hook in leds-gpio

Enhance leds-gpio to provide hardware-based led flashing by passing
through the blink_set() call to a optionally set platform-specific
function pointer.

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/leds.h b/include/linux/leds.h
index b07e3d400bd6..c195a674b6ca 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -126,6 +126,9 @@ struct gpio_led {
 struct gpio_led_platform_data {
         int             num_leds;
         struct gpio_led *leds;
+        int             (*gpio_blink_set)(unsigned gpio,
+                                        unsigned long *delay_on,
+                                        unsigned long *delay_off);
 };