diff options
Diffstat (limited to 'drivers/leds/led-core.c')
| -rw-r--r-- | drivers/leds/led-core.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c index ede4fa0ac2cc..e3da7c03da1b 100644 --- a/drivers/leds/led-core.c +++ b/drivers/leds/led-core.c @@ -16,7 +16,9 @@ #include <linux/list.h> #include <linux/module.h> #include <linux/mutex.h> +#include <linux/of.h> #include <linux/rwsem.h> +#include <linux/slab.h> #include "leds.h" DECLARE_RWSEM(leds_list_lock); @@ -310,6 +312,34 @@ int led_update_brightness(struct led_classdev *led_cdev) } EXPORT_SYMBOL_GPL(led_update_brightness); +u32 *led_get_default_pattern(struct led_classdev *led_cdev, unsigned int *size) +{ + struct device_node *np = dev_of_node(led_cdev->dev); + u32 *pattern; + int count; + + if (!np) + return NULL; + + count = of_property_count_u32_elems(np, "led-pattern"); + if (count < 0) + return NULL; + + pattern = kcalloc(count, sizeof(*pattern), GFP_KERNEL); + if (!pattern) + return NULL; + + if (of_property_read_u32_array(np, "led-pattern", pattern, count)) { + kfree(pattern); + return NULL; + } + + *size = count; + + return pattern; +} +EXPORT_SYMBOL_GPL(led_get_default_pattern); + /* Caller must ensure led_cdev->led_access held */ void led_sysfs_disable(struct led_classdev *led_cdev) { |