[Linux-stm32] [PATCH 2/4] pwm: stm32-lp: Add power management support

Wed Feb 6 08:54:05 UTC 2019

On Wed, Feb 06, 2019 at 09:42:48AM +0100, Fabrice Gasnier wrote:
> If you agree with the current approach, I can send a V2 with Tomasz's
> suggestion to remove the ifdefs and use __maybe_unused instead.

I think the suspend callback should have something like:

	if (is_still_enabled) {
		/*
		 * The consumer didn't stop us, so refuse to suspend.
		 */
		dev_err(dev, "The consumer didn't stop us, so refuse to suspend.\n");
		return -EBUSY;
	}

This way there are no bad surprises if the pwm is suspended before its
consumer and it's obvious what is missing.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |