ASoC: wm8994: Implement support for self-oscillation mode in the FLL
The FLLs in the WM8994 series devices can be started without any reference
being supplied, mainly for use in analogue bypass cases. Implement support
for this mode.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 04ef031..2c9b8b7 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -2102,6 +2102,10 @@
case WM8994_FLL_SRC_LRCLK:
case WM8994_FLL_SRC_BCLK:
break;
+ case WM8994_FLL_SRC_INTERNAL:
+ freq_in = 12000000;
+ freq_out = 12000000;
+ break;
default:
return -EINVAL;
}
@@ -2164,9 +2168,11 @@
fll.n << WM8994_FLL1_N_SHIFT);
snd_soc_update_bits(codec, WM8994_FLL1_CONTROL_5 + reg_offset,
- WM8958_FLL1_BYP |
+ WM8994_FLL1_FRC_NCO | WM8958_FLL1_BYP |
WM8994_FLL1_REFCLK_DIV_MASK |
WM8994_FLL1_REFCLK_SRC_MASK,
+ ((src == WM8994_FLL_SRC_INTERNAL)
+ << WM8994_FLL1_FRC_NCO_SHIFT) |
(fll.clk_ref_div << WM8994_FLL1_REFCLK_DIV_SHIFT) |
(src - 1));
@@ -2192,13 +2198,16 @@
}
}
+ reg = WM8994_FLL1_ENA;
+
if (fll.k)
- reg = WM8994_FLL1_ENA | WM8994_FLL1_FRAC;
- else
- reg = WM8994_FLL1_ENA;
+ reg |= WM8994_FLL1_FRAC;
+ if (src == WM8994_FLL_SRC_INTERNAL)
+ reg |= WM8994_FLL1_OSC_ENA;
+
snd_soc_update_bits(codec, WM8994_FLL1_CONTROL_1 + reg_offset,
- WM8994_FLL1_ENA | WM8994_FLL1_FRAC,
- reg);
+ WM8994_FLL1_ENA | WM8994_FLL1_OSC_ENA |
+ WM8994_FLL1_FRAC, reg);
if (wm8994->fll_locked_irq) {
timeout = wait_for_completion_timeout(&wm8994->fll_locked[id],