From cd22000ade0cf023da30031b51ca810a5b6b1b8d 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 1d1b43fe1722..ab332e380fb3 100644 --- a/sound/soc/codecs/wm8994.c +++ b/sound/soc/codecs/wm8994.c @@ -2258,6 +2258,18 @@ out: 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