Theta/lambda is used to give the fractional portion of the FLL frequency multiplication. When the synchroniser is active the reference path lambda value is hard coded in the hardware to 65536. This patch corrects the handling of theta such that it is scaled to match this denominator, when the synchroniser is active.
Signed-off-by: Charles Keepax ckeepax@opensource.wolfsonmicro.com --- sound/soc/codecs/arizona.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c index ccb3ca2..ded235f 100644 --- a/sound/soc/codecs/arizona.c +++ b/sound/soc/codecs/arizona.c @@ -1920,8 +1920,8 @@ static struct {
struct arizona_fll_cfg { int n; - int theta; - int lambda; + unsigned int theta; + unsigned int lambda; int refdiv; int outdiv; int fratio; @@ -2233,6 +2233,10 @@ static int arizona_enable_fll(struct arizona_fll *fll) fll->ref_src != fll->sync_src) { arizona_calc_fll(fll, &cfg, fll->ref_freq, false);
+ /* Ref path hardcodes lambda to 65536 when sync is on */ + if (fll->sync_src >= 0 && cfg.lambda) + cfg.theta = (cfg.theta * (1 << 16)) / cfg.lambda; + arizona_apply_fll(arizona, fll->base, &cfg, fll->ref_src, false); if (fll->sync_src >= 0) {