Commit 01ccf903 authored Aug 24, 2019 by Uwe Kleine-König Committed by Thierry Reding Sep 21, 2019

pwm: Let pwm_get_state() return the last implemented state



When pwm_apply_state() is called the lowlevel driver usually has to
apply some rounding because the hardware doesn't support nanosecond
resolution. So let pwm_get_state() return the actually implemented state
instead of the last applied one if possible.

Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

parent fc3c5512

drivers/pwm/core.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -474,6 +474,13 @@ int pwm_apply_state(struct pwm_device pwm, struct pwm_state state)
		if (err)
		return err;

		/*
		* .apply might have to round some values in *state, if possible
		* read the actually implemented value back.
		*/
		if (chip->ops->get_state)
		chip->ops->get_state(chip, pwm, &pwm->state);
		else
		pwm->state = *state;
		} else {
		/*

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