On Mon, 3 Dec 2007 11:35:57 +0100, Rodolfo Giometti <[email protected]> wrote:
> If I try to use the heartbeat trigger I hang the system... I suppose
> it is due the fact the led_set_brightness() function is called inside
> a kernel timer.
>
> How I can solve this problem? I thought to modify the trigger adding a
> kernel thread who manage the led which in turn is controlled by the
> kernel timer. It could be the right solution?
Yes, the heartbeat trigger driver assumes brightness_set() routine can
be called from timer. Other led-triggers also have this assumption.
So I'd suggest using workqueue for your led driver, as like as the
leds-gpio driver. Or you can just use the leds-gpio driver and
implement the gpio interface (gpio_set_value_cansleep) instead of the
led interface.
---
Atsushi Nemoto
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