ASoC: nau8825: fix invalid configuration in Pre-Scalar of FLL

BugLink: http://bugs.launchpad.net/bugs/1710646

[ Upstream commit a1792cda ]

The clk_ref_div is not configured in the correct position of the
register. The patch fixes that clk_ref_div, Pre-Scalar, is assigned
the wrong value.
Signed-off-by: John Hsu <KCHSU0@nuvoton.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

sound/soc/codecs/nau8825.c

@@ -936,7 +936,8 @@ static void nau8825_fll_apply(struct nau8825 *nau8825,
 			NAU8825_FLL_INTEGER_MASK, fll_param->fll_int);
 	/* FLL pre-scaler */
 	regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL4,
-			NAU8825_FLL_REF_DIV_MASK, fll_param->clk_ref_div);
+			NAU8825_FLL_REF_DIV_MASK,
+			fll_param->clk_ref_div << NAU8825_FLL_REF_DIV_SFT);
 	/* select divided VCO input */
 	regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL5,
 			NAU8825_FLL_FILTER_SW_MASK, 0x0000);

sound/soc/codecs/nau8825.h

@@ -114,7 +114,8 @@
 #define NAU8825_FLL_INTEGER_MASK		(0x3ff << 0)
 
 /* FLL4 (0x07) */
-#define NAU8825_FLL_REF_DIV_MASK		(0x3 << 10)
+#define NAU8825_FLL_REF_DIV_SFT	10
+#define NAU8825_FLL_REF_DIV_MASK	(0x3 << NAU8825_FLL_REF_DIV_SFT)
 
 /* FLL5 (0x08) */
 #define NAU8825_FLL_FILTER_SW_MASK		(0x1 << 14)