Unverified Commit 7b6b0049 authored Feb 26, 2019 by Olivier Moysan Committed by Mark Brown Feb 26, 2019

ASoC: stm32: i2s: skip useless write in slave mode



Dummy write in capture master mode is used to gate
bus clocks. This write is useless in slave mode
as the clocks are not managed by slave.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent 3005decf

sound/soc/stm/stm32_i2s.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -623,8 +623,8 @@ static int stm32_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
		} else {
		ier = I2S_IER_OVRIE;

		if (i2s->refcount == 1)
		/* dummy write to trigger capture */
		if (STM32_I2S_IS_MASTER(i2s) && i2s->refcount == 1)
		/* dummy write to gate bus clocks */
		regmap_write(i2s->regmap,
		STM32_I2S_TXDR_REG, 0);
		}