ASoC: clean up wm8974 and wm8978 clock divider handling

wm8974 and wm8978 codec drivers control DAC and ADC oversampling rates in their
.set_clkdiv() methods, which is wrong, because these are simple boolean
switches and not clock dividers. Move these bits to sound controls. Also remove
manual configuration of the MCLK divider in wm8978, since it is configured
automatically.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8974.c

@@ -170,6 +170,10 @@ SOC_ENUM("Aux Mode", wm8974_auxmode),
 
 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
+
+/* DAC / ADC oversampling */
+SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
+SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
 };
 
 /* Speaker Output Mixer */
@@ -381,14 +385,6 @@ static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 		reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
 		snd_soc_write(codec, WM8974_CLOCK, reg | div);
 		break;
-	case WM8974_ADCCLK:
-		reg = snd_soc_read(codec, WM8974_ADC) & 0x1f7;
-		snd_soc_write(codec, WM8974_ADC, reg | div);
-		break;
-	case WM8974_DACCLK:
-		reg = snd_soc_read(codec, WM8974_DAC) & 0x1f7;
-		snd_soc_write(codec, WM8974_DAC, reg | div);
-		break;
 	case WM8974_BCLKDIV:
 		reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
 		snd_soc_write(codec, WM8974_CLOCK, reg | div);

sound/soc/codecs/wm8974.h

@@ -57,17 +57,7 @@
 /* Clock divider Id's */
 #define WM8974_OPCLKDIV		0
 #define WM8974_MCLKDIV		1
-#define WM8974_ADCCLK		2
-#define WM8974_DACCLK		3
-#define WM8974_BCLKDIV		4
-
-/* DAC clock dividers */
-#define WM8974_DACCLK_F2	(1 << 3)
-#define WM8974_DACCLK_F4	(0 << 3)
-
-/* ADC clock dividers */
-#define WM8974_ADCCLK_F2	(1 << 3)
-#define WM8974_ADCCLK_F4	(0 << 3)
+#define WM8974_BCLKDIV		2
 
 /* PLL Out dividers */
 #define WM8974_OPCLKDIV_1	(0 << 4)

sound/soc/codecs/wm8978.c

@@ -210,6 +210,10 @@ static const struct snd_kcontrol_new wm8978_snd_controls[] = {
 	/* Speaker */
 	SOC_DOUBLE_R("Speaker Switch",
 		WM8978_LOUT2_SPK_CONTROL, WM8978_ROUT2_SPK_CONTROL, 6, 1, 1),
+
+	/* DAC / ADC oversampling */
+	SOC_SINGLE("DAC 128x Oversampling Switch", WM8978_DAC_CONTROL, 8, 1, 0),
+	SOC_SINGLE("ADC 128x Oversampling Switch", WM8978_ADC_CONTROL, 8, 1, 0),
 };
 
 /* Mixer #1: Output (OUT1, OUT2) Mixer: mix AUX, Input mixer output and DAC */
@@ -513,21 +517,6 @@ static int wm8978_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 		if (wm8978->f_mclk)
 			ret = wm8978_configure_pll(codec);
 		break;
-	case WM8978_MCLKDIV:
-		if (div & ~0xe0)
-			return -EINVAL;
-		snd_soc_update_bits(codec, WM8978_CLOCKING, 0xe0, div);
-		break;
-	case WM8978_ADCCLK:
-		if (div & ~8)
-			return -EINVAL;
-		snd_soc_update_bits(codec, WM8978_ADC_CONTROL, 8, div);
-		break;
-	case WM8978_DACCLK:
-		if (div & ~8)
-			return -EINVAL;
-		snd_soc_update_bits(codec, WM8978_DAC_CONTROL, 8, div);
-		break;
 	case WM8978_BCLKDIV:
 		if (div & ~0x1c)
 			return -EINVAL;

sound/soc/codecs/wm8978.h

@@ -72,9 +72,6 @@
 /* Clock divider Id's */
 enum wm8978_clk_id {
 	WM8978_OPCLKRATE,
-	WM8978_MCLKDIV,
-	WM8978_ADCCLK,
-	WM8978_DACCLK,
 	WM8978_BCLKDIV,
 };
 

sound/soc/sh/migor.c

@@ -59,10 +59,6 @@ static int migor_hw_params(struct snd_pcm_substream *substream,
 	if (ret < 0)
 		return ret;
 
-	ret = snd_soc_dai_set_clkdiv(codec_dai, WM8978_DACCLK, 8);
-	if (ret < 0)
-		return ret;
-
 	ret = snd_soc_dai_set_clkdiv(codec_dai, WM8978_OPCLKRATE, rate * 512);
 	if (ret < 0)
 		return ret;