From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Mon, 4 Mar 2013 08:00:19 +0000 (+0800)
Subject: ASoC: arizona: If we only have a clock to synchronise with make it REFCLK
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=ff680a173506e0f5f15c1d9c70251e7e3208c761;p=deliverable%2Flinux.git

ASoC: arizona: If we only have a clock to synchronise with make it REFCLK

If there is only one clock active the FLL should use REFCLK rather than
SYNCCLK as the clock to synchronise with since REFCLK is always required.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index e456cb4b196e..0599ff8ea935 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -1132,14 +1132,30 @@ static void arizona_enable_fll(struct arizona_fll *fll,
 	struct arizona *arizona = fll->arizona;
 	int ret;
 
-	regmap_update_bits(arizona->regmap, fll->base + 5,
-			   ARIZONA_FLL1_OUTDIV_MASK,
-			   ref->outdiv << ARIZONA_FLL1_OUTDIV_SHIFT);
-
-	arizona_apply_fll(arizona, fll->base, ref, fll->ref_src);
-	if (fll->sync_src >= 0)
-		arizona_apply_fll(arizona, fll->base + 0x10, sync,
+	/*
+	 * If we have both REFCLK and SYNCCLK then enable both,
+	 * otherwise apply the SYNCCLK settings to REFCLK.
+	 */
+	if (fll->ref_src >= 0 && fll->ref_src != fll->sync_src) {
+		regmap_update_bits(arizona->regmap, fll->base + 5,
+				   ARIZONA_FLL1_OUTDIV_MASK,
+				   ref->outdiv << ARIZONA_FLL1_OUTDIV_SHIFT);
+
+		arizona_apply_fll(arizona, fll->base, ref, fll->ref_src);
+		if (fll->sync_src >= 0)
+			arizona_apply_fll(arizona, fll->base + 0x10, sync,
+					  fll->sync_src);
+	} else if (fll->sync_src >= 0) {
+		regmap_update_bits(arizona->regmap, fll->base + 5,
+				   ARIZONA_FLL1_OUTDIV_MASK,
+				   sync->outdiv << ARIZONA_FLL1_OUTDIV_SHIFT);
+
+		arizona_apply_fll(arizona, fll->base, sync,
 				  fll->sync_src);
+	} else {
+		arizona_fll_err(fll, "No clocks provided\n");
+		return;
+	}
 
 	if (!arizona_is_enabled_fll(fll))
 		pm_runtime_get(arizona->dev);
@@ -1149,7 +1165,8 @@ static void arizona_enable_fll(struct arizona_fll *fll,
 
 	regmap_update_bits(arizona->regmap, fll->base + 1,
 			   ARIZONA_FLL1_ENA, ARIZONA_FLL1_ENA);
-	if (fll->sync_src >= 0)
+	if (fll->ref_src >= 0 && fll->sync_src >= 0 &&
+	    fll->ref_src != fll->sync_src)
 		regmap_update_bits(arizona->regmap, fll->base + 0x11,
 				   ARIZONA_FLL1_SYNC_ENA,
 				   ARIZONA_FLL1_SYNC_ENA);
@@ -1180,9 +1197,6 @@ int arizona_set_fll_refclk(struct arizona_fll *fll, int source,
 	struct arizona_fll_cfg ref, sync;
 	int ret;
 
-	if (source < 0)
-		return -EINVAL;
-
 	if (fll->ref_src == source && fll->ref_freq == Fref)
 		return 0;
 
@@ -1216,39 +1230,25 @@ int arizona_set_fll(struct arizona_fll *fll, int source,
 	struct arizona_fll_cfg ref, sync;
 	int ret;
 
-	if (fll->ref_src < 0 || fll->ref_src == source) {
-		if (fll->sync_src == ARIZONA_FLL_SRC_NONE &&
-		    fll->ref_src == source && fll->ref_freq == Fref &&
-		    fll->fout == Fout)
-			return 0;
-
-		if (Fout) {
-			ret = arizona_calc_fll(fll, &ref, Fref, Fout);
-			if (ret != 0)
-				return ret;
-		}
-
-		fll->sync_src = ARIZONA_FLL_SRC_NONE;
-		fll->ref_src = source;
-		fll->ref_freq = Fref;
-	} else {
-		if (fll->sync_src == source &&
-		    fll->sync_freq == Fref && fll->fout == Fout)
-			return 0;
-
-		if (Fout) {
-			ret = arizona_calc_fll(fll, &ref, fll->ref_freq, Fout);
-			if (ret != 0)
-				return ret;
+	if (fll->sync_src == source &&
+	    fll->sync_freq == Fref && fll->fout == Fout)
+		return 0;
 
-			ret = arizona_calc_fll(fll, &sync, Fref, Fout);
+	if (Fout) {
+		if (fll->ref_src >= 0) {
+			ret = arizona_calc_fll(fll, &ref, fll->ref_freq,
+					       Fout);
 			if (ret != 0)
 				return ret;
 		}
 
-		fll->sync_src = source;
-		fll->sync_freq = Fref;
+		ret = arizona_calc_fll(fll, &sync, Fref, Fout);
+		if (ret != 0)
+			return ret;
 	}
+
+	fll->sync_src = source;
+	fll->sync_freq = Fref;
 	fll->fout = Fout;
 
 	if (Fout) {