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authorLinus Torvalds <torvalds@linux-foundation.org>2014-12-16 05:28:25 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-16 05:28:25 +0300
commit2dbfca5a181973558277b28b1f4c36362291f5e0 (patch)
treee9d217adf53e3532939e7a3c3bcec94afd671306 /include/linux/leds.h
parentdab363f938a53ddaee60bfecc1aebdbb3d3af5f0 (diff)
parent2969bb18f8895eb4e0fbbc98efe706f15a3acff5 (diff)
downloadlinux-2dbfca5a181973558277b28b1f4c36362291f5e0.tar.xz
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds
Pull LED subsystem update from Bryan Wu: "We got some cleanup and driver for LP8860 as well as some patches for LED Flash Class" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: leds: lp8860: Fix module dependency leds: lp8860: Introduce TI lp8860 4 channel LED driver leds: Add support for setting brightness in a synchronous way leds: implement sysfs interface locking mechanism leds: syscon: handle multiple syscon instances leds: delete copy/paste mistake leds: regulator: Convert to devm_regulator_get_exclusive
Diffstat (limited to 'include/linux/leds.h')
-rw-r--r--include/linux/leds.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 361101fef270..cfceef32c9b3 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -13,6 +13,7 @@
#define __LINUX_LEDS_H_INCLUDED
#include <linux/list.h>
+#include <linux/mutex.h>
#include <linux/rwsem.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
@@ -42,11 +43,20 @@ struct led_classdev {
#define LED_BLINK_ONESHOT (1 << 17)
#define LED_BLINK_ONESHOT_STOP (1 << 18)
#define LED_BLINK_INVERT (1 << 19)
+#define LED_SYSFS_DISABLE (1 << 20)
+#define SET_BRIGHTNESS_ASYNC (1 << 21)
+#define SET_BRIGHTNESS_SYNC (1 << 22)
/* Set LED brightness level */
/* Must not sleep, use a workqueue if needed */
void (*brightness_set)(struct led_classdev *led_cdev,
enum led_brightness brightness);
+ /*
+ * Set LED brightness level immediately - it can block the caller for
+ * the time required for accessing a LED device register.
+ */
+ int (*brightness_set_sync)(struct led_classdev *led_cdev,
+ enum led_brightness brightness);
/* Get LED brightness level */
enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);
@@ -85,6 +95,9 @@ struct led_classdev {
/* true if activated - deactivate routine uses it to do cleanup */
bool activated;
#endif
+
+ /* Ensures consistent access to the LED Flash Class device */
+ struct mutex led_access;
};
extern int led_classdev_register(struct device *parent,
@@ -151,6 +164,33 @@ extern void led_set_brightness(struct led_classdev *led_cdev,
*/
extern int led_update_brightness(struct led_classdev *led_cdev);
+/**
+ * led_sysfs_disable - disable LED sysfs interface
+ * @led_cdev: the LED to set
+ *
+ * Disable the led_cdev's sysfs interface.
+ */
+extern void led_sysfs_disable(struct led_classdev *led_cdev);
+
+/**
+ * led_sysfs_enable - enable LED sysfs interface
+ * @led_cdev: the LED to set
+ *
+ * Enable the led_cdev's sysfs interface.
+ */
+extern void led_sysfs_enable(struct led_classdev *led_cdev);
+
+/**
+ * led_sysfs_is_disabled - check if LED sysfs interface is disabled
+ * @led_cdev: the LED to query
+ *
+ * Returns: true if the led_cdev's sysfs interface is disabled.
+ */
+static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev)
+{
+ return led_cdev->flags & LED_SYSFS_DISABLE;
+}
+
/*
* LED Triggers
*/