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 --- sound/soc/codecs/wm8994.c | 21 +++++++++++++++------ sound/soc/codecs/wm8994.h | 9 +++++---- 2 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c index 235577a..30fdcf9 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], diff --git a/sound/soc/codecs/wm8994.h b/sound/soc/codecs/wm8994.h index d77e06f..19068d8 100644 --- a/sound/soc/codecs/wm8994.h +++ b/sound/soc/codecs/wm8994.h @@ -28,10 +28,11 @@ #define WM8994_FLL1 1 #define WM8994_FLL2 2

-#define WM8994_FLL_SRC_MCLK1 1 -#define WM8994_FLL_SRC_MCLK2 2 -#define WM8994_FLL_SRC_LRCLK 3 -#define WM8994_FLL_SRC_BCLK 4 +#define WM8994_FLL_SRC_MCLK1 1 +#define WM8994_FLL_SRC_MCLK2 2 +#define WM8994_FLL_SRC_LRCLK 3 +#define WM8994_FLL_SRC_BCLK 4 +#define WM8994_FLL_SRC_INTERNAL 5

enum wm8994_vmid_mode { WM8994_VMID_NORMAL,