Messages in this thread Patch in this message | | | From | Christian Marangi <> | Subject | [net-next PATCH v2 02/13] leds: add API to get attached device for LED hw control | Date | Thu, 25 May 2023 16:53:50 +0200 |
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From: Andrew Lunn <andrew@lunn.ch>
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> --- include/linux/leds.h | 6 ++++++ 1 file changed, 6 insertions(+)
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 -- 2.39.2
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