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Message-Id: <20230525145401.27007-3-ansuelsmth@gmail.com> Date: Thu, 25 May 2023 16:53:50 +0200 From: Christian Marangi <ansuelsmth@...il.com> To: Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>, Jonathan Corbet <corbet@....net>, Andrew Lunn <andrew@...n.ch>, Florian Fainelli <f.fainelli@...il.com>, Vladimir Oltean <olteanv@...il.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Christian Marangi <ansuelsmth@...il.com>, linux-leds@...r.kernel.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: [net-next PATCH v2 02/13] leds: add API to get attached device for LED hw control From: Andrew Lunn <andrew@...n.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@...n.ch> Signed-off-by: Christian Marangi <ansuelsmth@...il.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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