diff options
| author | Andrew Lunn <andrew@lunn.ch> | 2023-05-29 18:32:32 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-05-31 10:42:08 +0200 |
| commit | 052c38eb17e866c5b4cd43924e7a5e20167b55c0 (patch) | |
| tree | d402e50b609d13fd07d389ef56b5bbdb8ee03851 | |
| parent | leds: add APIs for LEDs hw control (diff) | |
| download | linux-052c38eb17e866c5b4cd43924e7a5e20167b55c0.tar.xz linux-052c38eb17e866c5b4cd43924e7a5e20167b55c0.zip | |
leds: add API to get attached device for LED hw control
Some specific LED triggers blink the LED based on events from a device
or subsystem.
For example, an LED could be blinked to indicate a network device is
receiving packets, or a disk is reading blocks. To correctly enable and
request the hw control of the LED, the trigger has to check if the
network interface or block device configured via a /sys/class/led file
match the one the LED driver provide for hw control for.
Provide an API call to get the device which the LED blinks for.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/leds.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h index 4caf559b1922..3268b4e789d6 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -220,6 +220,12 @@ struct led_classdev { */ int (*hw_control_get)(struct led_classdev *led_cdev, unsigned long *flags); + /* + * Get the device this LED blinks in response to. + * e.g. for a PHY LED, it is the network device. If the LED is + * not yet associated to a device, return NULL. + */ + struct device *(*hw_control_get_device)(struct led_classdev *led_cdev); #endif #ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED |