summaryrefslogtreecommitdiff
path: root/sound/soc/codecs/wm8994.c
diff options
context:
space:
mode:
authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-10-24 10:56:30 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-11-22 17:36:30 +0900
commitcd22000ade0cf023da30031b51ca810a5b6b1b8d (patch)
tree199a0b1b284fa12f327c0de6510906bd443ba2c6 /sound/soc/codecs/wm8994.c
parent6730049a4763e868d66caea622e8aef6b8afdb57 (diff)
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 <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/wm8994.c')
-rw-r--r--sound/soc/codecs/wm8994.c12
1 files changed, 12 insertions, 0 deletions
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;
}