ASoC: wm8940: Convert to direct regmap API usage

This helps move us towards being able to remove the ASoC level I/O code.
Signed-off-by: Mark Brown <broonie@linaro.org>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>

sound/soc/codecs/wm8940.c

@@ -28,7 +28,7 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/i2c.h>
-#include <linux/spi/spi.h>
+#include <linux/regmap.h>
 #include <linux/slab.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -41,78 +41,116 @@
 
 struct wm8940_priv {
 	unsigned int sysclk;
-	enum snd_soc_control_type control_type;
+	struct regmap *regmap;
 };
 
-static int wm8940_volatile_register(struct snd_soc_codec *codec,
-				    unsigned int reg)
+static bool wm8940_volatile_register(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case WM8940_SOFTRESET:
-		return 1;
+		return true;
 	default:
-		return 0;
+		return false;
+	}
+}
+
+static bool wm8940_readable_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case WM8940_SOFTRESET:
+	case WM8940_POWER1:
+	case WM8940_POWER2:
+	case WM8940_POWER3:
+	case WM8940_IFACE:
+	case WM8940_COMPANDINGCTL:
+	case WM8940_CLOCK:
+	case WM8940_ADDCNTRL:
+	case WM8940_GPIO:
+	case WM8940_CTLINT:
+	case WM8940_DAC:
+	case WM8940_DACVOL:
+	case WM8940_ADC:
+	case WM8940_ADCVOL:
+	case WM8940_NOTCH1:
+	case WM8940_NOTCH2:
+	case WM8940_NOTCH3:
+	case WM8940_NOTCH4:
+	case WM8940_NOTCH5:
+	case WM8940_NOTCH6:
+	case WM8940_NOTCH7:
+	case WM8940_NOTCH8:
+	case WM8940_DACLIM1:
+	case WM8940_DACLIM2:
+	case WM8940_ALC1:
+	case WM8940_ALC2:
+	case WM8940_ALC3:
+	case WM8940_NOISEGATE:
+	case WM8940_PLLN:
+	case WM8940_PLLK1:
+	case WM8940_PLLK2:
+	case WM8940_PLLK3:
+	case WM8940_ALC4:
+	case WM8940_INPUTCTL:
+	case WM8940_PGAGAIN:
+	case WM8940_ADCBOOST:
+	case WM8940_OUTPUTCTL:
+	case WM8940_SPKMIX:
+	case WM8940_SPKVOL:
+	case WM8940_MONOMIX:
+		return true;
+	default:
+		return false;
 	}
 }
 
-static u16 wm8940_reg_defaults[] = {
-	0x8940, /* Soft Reset */
-	0x0000, /* Power 1 */
-	0x0000, /* Power 2 */
-	0x0000, /* Power 3 */
-	0x0010, /* Interface Control */
-	0x0000, /* Companding Control */
-	0x0140, /* Clock Control */
-	0x0000, /* Additional Controls */
-	0x0000, /* GPIO Control */
-	0x0002, /* Auto Increment Control */
-	0x0000, /* DAC Control */
-	0x00FF, /* DAC Volume */
-	0,
-	0,
-	0x0100, /* ADC Control */
-	0x00FF, /* ADC Volume */
-	0x0000, /* Notch Filter 1 Control 1 */
-	0x0000, /* Notch Filter 1 Control 2 */
-	0x0000, /* Notch Filter 2 Control 1 */
-	0x0000, /* Notch Filter 2 Control 2 */
-	0x0000, /* Notch Filter 3 Control 1 */
-	0x0000, /* Notch Filter 3 Control 2 */
-	0x0000, /* Notch Filter 4 Control 1 */
-	0x0000, /* Notch Filter 4 Control 2 */
-	0x0032, /* DAC Limit Control 1 */
-	0x0000, /* DAC Limit Control 2 */
-	0,
-	0,
-	0,
-	0,
-	0,
-	0,
-	0x0038, /* ALC Control 1 */
-	0x000B, /* ALC Control 2 */
-	0x0032, /* ALC Control 3 */
-	0x0000, /* Noise Gate */
-	0x0041, /* PLLN */
-	0x000C, /* PLLK1 */
-	0x0093, /* PLLK2 */
-	0x00E9, /* PLLK3 */
-	0,
-	0,
-	0x0030, /* ALC Control 4 */
-	0,
-	0x0002, /* Input Control */
-	0x0050, /* PGA Gain */
-	0,
-	0x0002, /* ADC Boost Control */
-	0,
-	0x0002, /* Output Control */
-	0x0000, /* Speaker Mixer Control */
-	0,
-	0,
-	0,
-	0x0079, /* Speaker Volume */
-	0,
-	0x0000, /* Mono Mixer Control */
+static const struct reg_default wm8940_reg_defaults[] = {
+	{  0x1, 0x0000 }, /* Power 1 */
+	{  0x2, 0x0000 }, /* Power 2 */
+	{  0x3, 0x0000 }, /* Power 3 */
+	{  0x4, 0x0010 }, /* Interface Control */
+	{  0x5, 0x0000 }, /* Companding Control */
+	{  0x6, 0x0140 }, /* Clock Control */
+	{  0x7, 0x0000 }, /* Additional Controls */
+	{  0x8, 0x0000 }, /* GPIO Control */
+	{  0x9, 0x0002 }, /* Auto Increment Control */
+	{  0xa, 0x0000 }, /* DAC Control */
+	{  0xb, 0x00FF }, /* DAC Volume */
+
+	{  0xe, 0x0100 }, /* ADC Control */
+	{  0xf, 0x00FF }, /* ADC Volume */
+	{ 0x10, 0x0000 }, /* Notch Filter 1 Control 1 */
+	{ 0x11, 0x0000 }, /* Notch Filter 1 Control 2 */
+	{ 0x12, 0x0000 }, /* Notch Filter 2 Control 1 */
+	{ 0x13, 0x0000 }, /* Notch Filter 2 Control 2 */
+	{ 0x14, 0x0000 }, /* Notch Filter 3 Control 1 */
+	{ 0x15, 0x0000 }, /* Notch Filter 3 Control 2 */
+	{ 0x16, 0x0000 }, /* Notch Filter 4 Control 1 */
+	{ 0x17, 0x0000 }, /* Notch Filter 4 Control 2 */
+	{ 0x18, 0x0032 }, /* DAC Limit Control 1 */
+	{ 0x19, 0x0000 }, /* DAC Limit Control 2 */
+
+	{ 0x20, 0x0038 }, /* ALC Control 1 */
+	{ 0x21, 0x000B }, /* ALC Control 2 */
+	{ 0x22, 0x0032 }, /* ALC Control 3 */
+	{ 0x23, 0x0000 }, /* Noise Gate */
+	{ 0x24, 0x0041 }, /* PLLN */
+	{ 0x25, 0x000C }, /* PLLK1 */
+	{ 0x26, 0x0093 }, /* PLLK2 */
+	{ 0x27, 0x00E9 }, /* PLLK3 */
+
+	{ 0x2a, 0x0030 }, /* ALC Control 4 */
+
+	{ 0x2c, 0x0002 }, /* Input Control */
+	{ 0x2d, 0x0050 }, /* PGA Gain */
+
+	{ 0x2f, 0x0002 }, /* ADC Boost Control */
+
+	{ 0x31, 0x0002 }, /* Output Control */
+	{ 0x32, 0x0000 }, /* Speaker Mixer Control */
+
+	{ 0x36, 0x0079 }, /* Speaker Volume */
+
+	{ 0x38, 0x0000 }, /* Mono Mixer Control */
 };
 
 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
@@ -431,6 +469,7 @@ static int wm8940_mute(struct snd_soc_dai *dai, int mute)
 static int wm8940_set_bias_level(struct snd_soc_codec *codec,
 				 enum snd_soc_bias_level level)
 {
+	struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
 	u16 val;
 	u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
 	int ret = 0;
@@ -454,7 +493,7 @@ static int wm8940_set_bias_level(struct snd_soc_codec *codec,
 		break;
 	case SND_SOC_BIAS_STANDBY:
 		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
-			ret = snd_soc_cache_sync(codec);
+			ret = regcache_sync(wm8940->regmap);
 			if (ret < 0) {
 				dev_err(codec->dev, "Failed to sync cache: %d\n", ret);
 				return ret;
@@ -669,12 +708,11 @@ static int wm8940_resume(struct snd_soc_codec *codec)
 
 static int wm8940_probe(struct snd_soc_codec *codec)
 {
-	struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
 	struct wm8940_setup_data *pdata = codec->dev->platform_data;
 	int ret;
 	u16 reg;
 
-	ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type);
+	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_REGMAP);
 	if (ret < 0) {
 		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 		return ret;
@@ -722,10 +760,18 @@ static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
 	.num_dapm_widgets = ARRAY_SIZE(wm8940_dapm_widgets),
 	.dapm_routes =  wm8940_dapm_routes,
 	.num_dapm_routes = ARRAY_SIZE(wm8940_dapm_routes),
-	.reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults),
-	.reg_word_size = sizeof(u16),
-	.reg_cache_default = wm8940_reg_defaults,
-	.volatile_register = wm8940_volatile_register,
+};
+
+static const struct regmap_config wm8940_regmap = {
+	.reg_bits = 8,
+	.val_bits = 16,
+
+	.max_register = WM8940_MONOMIX,
+	.reg_defaults = wm8940_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(wm8940_reg_defaults),
+
+	.readable_reg = wm8940_readable_register,
+	.volatile_reg = wm8940_volatile_register,
 };
 
 static int wm8940_i2c_probe(struct i2c_client *i2c,
@@ -739,8 +785,11 @@ static int wm8940_i2c_probe(struct i2c_client *i2c,
 	if (wm8940 == NULL)
 		return -ENOMEM;
 
+	wm8940->regmap = devm_regmap_init_i2c(i2c, &wm8940_regmap);
+	if (IS_ERR(wm8940->regmap))
+		return PTR_ERR(wm8940->regmap);
+
 	i2c_set_clientdata(i2c, wm8940);
-	wm8940->control_type = SND_SOC_I2C;
 
 	ret = snd_soc_register_codec(&i2c->dev,
 			&soc_codec_dev_wm8940, &wm8940_dai, 1);