linux-kernel - Re: [PATCH 1/9] can: add tx/rx LED trigger support

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Message-ID: <50CEC9B0.3040503@universalnet.at>
Date:	Mon, 17 Dec 2012 08:28:48 +0100
From:	Bernd Krumboeck <krumboeck@...versalnet.at>
To:	Fabio Baltieri <fabio.baltieri@...il.com>
CC:	Marc Kleine-Budde <mkl@...gutronix.de>, linux-can@...r.kernel.org,
	Kurt Van Dijck <kurt.van.dijck@....be>,
	Wolfgang Grandegger <wg@...ndegger.com>,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/9] can: add tx/rx LED trigger support

Hello Fabio!

Am 2012-12-16 12:08, schrieb Fabio Baltieri:
> This patch implements the functions to add two LED triggers, named
> <ifname>-tx and <ifname>-rx, to a canbus device driver.
>
> Triggers are called from specific handlers by each CAN device driver and
> can be disabled altogether with a Kconfig option.
>
> The implementation keeps the LED on when the interface is UP and blinks
> the LED on network activity at a configurable rate.
>
> This only supports can-dev based drivers, as it uses some support field
> in the can_priv structure.
>
> Supported drivers should call devm_can_led_init() and can_led_event() as
> needed.
>
> Cleanup is handled automatically by devres, so no *_exit function is
> needed.
>
> Supported events are:
> - CAN_LED_EVENT_OPEN: turn on tx/rx LEDs
> - CAN_LED_EVENT_STOP: turn off tx/rx LEDs
> - CAN_LED_EVENT_TX: trigger tx LED blink
> - CAN_LED_EVENT_RX: trigger tx LED blink

Why there is no patch for any usb can device?

Can this be done in a more general way, except patching every driver?


regards,
Bernd

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