From 6730049a4763e868d66caea622e8aef6b8afdb57 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Wed, 24 Oct 2012 10:56:30 +0100 Subject: [PATCH] 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: Mark Brown --- sound/soc/codecs/wm8994.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c index 4d0ae9dcbc57..1d1b43fe1722 100644 --- a/sound/soc/codecs/wm8994.c +++ b/sound/soc/codecs/wm8994.c @@ -2346,6 +2346,18 @@ static int wm8994_set_dai_sysclk(struct snd_soc_dai *dai, 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; } -- 2.20.1