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| author |   Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-07-23 20:14:43 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-08-03 23:03:55 +0100 |
| commit | fbfe69836c088bcc0c5a0f32e788d3aef5f66aca (patch) | |
| tree | 4d2501263a33699f6a972789648c7982a0d8762b /sound/soc/codecs/wm8994.c | |
| parent | ASoC: isabelle: Remove version.h header file inclusion (diff) | |
| download | linux-dev-fbfe69836c088bcc0c5a0f32e788d3aef5f66aca.tar.xz linux-dev-fbfe69836c088bcc0c5a0f32e788d3aef5f66aca.zip | |
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>
Diffstat (limited to 'sound/soc/codecs/wm8994.c')
| -rw-r--r-- | sound/soc/codecs/wm8994.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c index 04ef03175c51..2c9b8b7fdf3d 100644 --- a/sound/soc/codecs/wm8994.c +++ b/sound/soc/codecs/wm8994.c @@ -2102,6 +2102,10 @@ static int _wm8994_set_fll(struct snd_soc_codec *codec, int id, int src, 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 @@ static int _wm8994_set_fll(struct snd_soc_codec *codec, int id, int src, 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 @@ static int _wm8994_set_fll(struct snd_soc_codec *codec, int id, int src, } } + 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], |