diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/818-v6.5-02-leds-add-API-to-get-attached-device-for-LED-hw-contr.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/818-v6.5-02-leds-add-API-to-get-attached-device-for-LED-hw-contr.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/818-v6.5-02-leds-add-API-to-get-attached-device-for-LED-hw-contr.patch b/target/linux/generic/backport-5.15/818-v6.5-02-leds-add-API-to-get-attached-device-for-LED-hw-contr.patch new file mode 100644 index 0000000000..1a221727a0 --- /dev/null +++ b/target/linux/generic/backport-5.15/818-v6.5-02-leds-add-API-to-get-attached-device-for-LED-hw-contr.patch @@ -0,0 +1,37 @@ +From 052c38eb17e866c5b4cd43924e7a5e20167b55c0 Mon Sep 17 00:00:00 2001 +From: Andrew Lunn <andrew@lunn.ch> +Date: Mon, 29 May 2023 18:32:32 +0200 +Subject: [PATCH 02/13] 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> +--- + include/linux/leds.h | 6 ++++++ + 1 file changed, 6 insertions(+) + +--- a/include/linux/leds.h ++++ b/include/linux/leds.h +@@ -201,6 +201,12 @@ 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 |