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Commit 6730049a authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: wm8994: Lower AIFnCLK divisor when dropping to 32kHz 



When lowering SYSCLK to 50kHz for accessory detection also lower the
AIFnCLK divisor to normalise the clocking configuration within the
device. This will not disrupt audio as we cannot support active audio
with such a low SYSCLK.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 0ffecd7d

sound/soc/codecs/wm8994.c

+12 −0
Original line number Original line Diff line number Diff line
@@ -2346,6 +2346,18 @@ static int wm8994_set_dai_sysclk(struct snd_soc_dai *dai, 




	configure_clock(codec);

	configure_clock(codec);





	/*

	 * If SYSCLK will be less than 50kHz adjust AIFnCLK dividers

	 * for detection.

	 */

	if (max(wm8994->aifclk[0], wm8994->aifclk[1]) < 50000) {

		dev_dbg(codec->dev, "Configuring AIFs for 128fs\n");

		snd_soc_update_bits(codec, WM8994_AIF1_RATE,

				    WM8994_AIF1CLK_RATE_MASK, 0x1);

		snd_soc_update_bits(codec, WM8994_AIF2_RATE,

				    WM8994_AIF2CLK_RATE_MASK, 0x1);

	}



	return 0;

	return 0;

}

}