diff mbox series

[net-next,v4,02/13] leds: add API to get attached device for LED hw control

Message ID 20230529163243.9555-3-ansuelsmth@gmail.com (mailing list archive)
State Accepted
Commit 052c38eb17e866c5b4cd43924e7a5e20167b55c0
Delegated to: Netdev Maintainers
Headers show
Series leds: introduce new LED hw control APIs | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1577 this patch: 1577
netdev/cc_maintainers success CCed 3 of 3 maintainers
netdev/build_clang success Errors and warnings before: 521 this patch: 521
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1602 this patch: 1602
netdev/checkpatch warning WARNING: line length of 89 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Christian Marangi May 29, 2023, 4:32 p.m. UTC 
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 mbox series

Patch

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