[alsa-devel] [PATCH] ASoC: WM8804: Refactor set_pll code to avoid GCC warnings

[Dimitris Papastamos]

Ensure that no uninitialised variable warnings are generated by
GCC.

Signed-off-by: Dimitris Papastamos <dp at opensource.wolfsonmicro.com>
---
 sound/soc/codecs/wm8804.c |   47 ++++++++++++++++++++++++--------------------
 1 files changed, 26 insertions(+), 21 deletions(-)

diff --git a/sound/soc/codecs/wm8804.c b/sound/soc/codecs/wm8804.c
index 40e5067..b23c57c 100644
--- a/sound/soc/codecs/wm8804.c
+++ b/sound/soc/codecs/wm8804.c
@@ -390,36 +390,41 @@ static int wm8804_set_pll(struct snd_soc_dai *dai, int pll_id,
 			  int source, unsigned int freq_in,
 			  unsigned int freq_out)
 {
-	int ret;
 	struct snd_soc_codec *codec;
-	struct pll_div pll_div = { 0 };
 
 	codec = dai->codec;
-	if (freq_in && freq_out) {
+	if (!freq_in || !freq_out) {
+		/* disable the PLL */
+		snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0);
+		return 0;
+	} else {
+		int ret;
+		struct pll_div pll_div;
+
 		ret = pll_factors(&pll_div, freq_out, freq_in);
 		if (ret)
 			return ret;
-	}
 
-	/* power down the PLL before reprogramming it */
-	snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0);
+		/* power down the PLL before reprogramming it */
+		snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0);
 
-	if (!freq_in || !freq_out)
-		return 0;
+		if (!freq_in || !freq_out)
+			return 0;
 
-	/* set PLLN and PRESCALE */
-	snd_soc_update_bits(codec, WM8804_PLL4, 0xf | 0x10,
-			    pll_div.n | (pll_div.prescale << 4));
-	/* set mclkdiv and freqmode */
-	snd_soc_update_bits(codec, WM8804_PLL5, 0x3 | 0x8,
-			    pll_div.freqmode | (pll_div.mclkdiv << 3));
-	/* set PLLK */
-	snd_soc_write(codec, WM8804_PLL1, pll_div.k & 0xff);
-	snd_soc_write(codec, WM8804_PLL2, (pll_div.k >> 8) & 0xff);
-	snd_soc_write(codec, WM8804_PLL3, pll_div.k >> 16);
-
-	/* power up the PLL */
-	snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1);
+		/* set PLLN and PRESCALE */
+		snd_soc_update_bits(codec, WM8804_PLL4, 0xf | 0x10,
+				    pll_div.n | (pll_div.prescale << 4));
+		/* set mclkdiv and freqmode */
+		snd_soc_update_bits(codec, WM8804_PLL5, 0x3 | 0x8,
+				    pll_div.freqmode | (pll_div.mclkdiv << 3));
+		/* set PLLK */
+		snd_soc_write(codec, WM8804_PLL1, pll_div.k & 0xff);
+		snd_soc_write(codec, WM8804_PLL2, (pll_div.k >> 8) & 0xff);
+		snd_soc_write(codec, WM8804_PLL3, pll_div.k >> 16);
+
+		/* power up the PLL */
+		snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1);
+	}
 
 	return 0;
 }
-- 
1.7.3.1