ASoC: wm9712: Convert to regmap

Currently the wm9712 driver still uses custom snd_soc_codec_driver IO
callbacks. This has been deprecated for a while, so convert the wm9712
driver to use regmap for its IO.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Marek Vasut <marex@denx.de>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -1057,6 +1057,7 @@ config SND_SOC_WM9705
 
 config SND_SOC_WM9712
 	tristate
+	select REGMAP_AC97
 
 config SND_SOC_WM9713
 	tristate

sound/soc/codecs/wm9712.c

@@ -15,6 +15,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
+#include <linux/regmap.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/ac97_codec.h>
@@ -32,31 +33,66 @@ struct wm9712_priv {
 	struct mutex lock;
 };
 
-static unsigned int ac97_read(struct snd_soc_codec *codec,
-	unsigned int reg);
-static int ac97_write(struct snd_soc_codec *codec,
-	unsigned int reg, unsigned int val);
+static const struct reg_default wm9712_reg_defaults[] = {
+	{ 0x02, 0x8000 },
+	{ 0x04, 0x8000 },
+	{ 0x06, 0x8000 },
+	{ 0x08, 0x0f0f },
+	{ 0x0a, 0xaaa0 },
+	{ 0x0c, 0xc008 },
+	{ 0x0e, 0x6808 },
+	{ 0x10, 0xe808 },
+	{ 0x12, 0xaaa0 },
+	{ 0x14, 0xad00 },
+	{ 0x16, 0x8000 },
+	{ 0x18, 0xe808 },
+	{ 0x1a, 0x3000 },
+	{ 0x1c, 0x8000 },
+	{ 0x20, 0x0000 },
+	{ 0x22, 0x0000 },
+	{ 0x26, 0x000f },
+	{ 0x28, 0x0605 },
+	{ 0x2a, 0x0410 },
+	{ 0x2c, 0xbb80 },
+	{ 0x2e, 0xbb80 },
+	{ 0x32, 0xbb80 },
+	{ 0x34, 0x2000 },
+	{ 0x4c, 0xf83e },
+	{ 0x4e, 0xffff },
+	{ 0x50, 0x0000 },
+	{ 0x52, 0x0000 },
+	{ 0x56, 0xf83e },
+	{ 0x58, 0x0008 },
+	{ 0x5c, 0x0000 },
+	{ 0x60, 0xb032 },
+	{ 0x62, 0x3e00 },
+	{ 0x64, 0x0000 },
+	{ 0x76, 0x0006 },
+	{ 0x78, 0x0001 },
+	{ 0x7a, 0x0000 },
+};
 
-/*
- * WM9712 register cache
- */
-static const u16 wm9712_reg[] = {
-	0x6174, 0x8000, 0x8000, 0x8000, /*  6 */
-	0x0f0f, 0xaaa0, 0xc008, 0x6808, /*  e */
-	0xe808, 0xaaa0, 0xad00, 0x8000, /* 16 */
-	0xe808, 0x3000, 0x8000, 0x0000, /* 1e */
-	0x0000, 0x0000, 0x0000, 0x000f, /* 26 */
-	0x0405, 0x0410, 0xbb80, 0xbb80, /* 2e */
-	0x0000, 0xbb80, 0x0000, 0x0000, /* 36 */
-	0x0000, 0x2000, 0x0000, 0x0000, /* 3e */
-	0x0000, 0x0000, 0x0000, 0x0000, /* 46 */
-	0x0000, 0x0000, 0xf83e, 0xffff, /* 4e */
-	0x0000, 0x0000, 0x0000, 0xf83e, /* 56 */
-	0x0008, 0x0000, 0x0000, 0x0000, /* 5e */
-	0xb032, 0x3e00, 0x0000, 0x0000, /* 66 */
-	0x0000, 0x0000, 0x0000, 0x0000, /* 6e */
-	0x0000, 0x0000, 0x0000, 0x0006, /* 76 */
-	0x0001, 0x0000, 0x574d, 0x4c12, /* 7e */
+static bool wm9712_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case AC97_REC_GAIN:
+		return true;
+	default:
+		return regmap_ac97_default_volatile(dev, reg);
+	}
+}
+
+static const struct regmap_config wm9712_regmap_config = {
+	.reg_bits = 16,
+	.reg_stride = 2,
+	.val_bits = 16,
+	.max_register = 0x7e,
+	.cache_type = REGCACHE_RBTREE,
+
+	.volatile_reg = wm9712_volatile_reg,
+
+	.reg_defaults = wm9712_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(wm9712_reg_defaults),
 };
 
 #define HPL_MIXER	0x0
@@ -488,35 +524,13 @@ static const struct snd_soc_dapm_route wm9712_audio_map[] = {
 static unsigned int ac97_read(struct snd_soc_codec *codec,
 	unsigned int reg)
 {
-	struct wm9712_priv *wm9712 = snd_soc_codec_get_drvdata(codec);
-	u16 *cache = codec->reg_cache;
-
-	if (reg == AC97_RESET || reg == AC97_GPIO_STATUS ||
-		reg == AC97_VENDOR_ID1 || reg == AC97_VENDOR_ID2 ||
-		reg == AC97_REC_GAIN)
-		return soc_ac97_ops->read(wm9712->ac97, reg);
-	else {
-		reg = reg >> 1;
-
-		if (reg >= (ARRAY_SIZE(wm9712_reg)))
-			return -EIO;
-
-		return cache[reg];
-	}
+	return snd_soc_read(codec, reg);
 }
 
 static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 	unsigned int val)
 {
-	struct wm9712_priv *wm9712 = snd_soc_codec_get_drvdata(codec);
-	u16 *cache = codec->reg_cache;
-
-	soc_ac97_ops->write(wm9712->ac97, reg, val);
-	reg = reg >> 1;
-	if (reg < (ARRAY_SIZE(wm9712_reg)))
-		cache[reg] = val;
-
-	return 0;
+	return snd_soc_write(codec, reg, val);
 }
 
 static int ac97_prepare(struct snd_pcm_substream *substream,
@@ -619,8 +633,7 @@ static int wm9712_set_bias_level(struct snd_soc_codec *codec,
 static int wm9712_soc_resume(struct snd_soc_codec *codec)
 {
 	struct wm9712_priv *wm9712 = snd_soc_codec_get_drvdata(codec);
-	int i, ret;
-	u16 *cache = codec->reg_cache;
+	int ret;
 
 	ret = snd_ac97_reset(wm9712->ac97, true, WM9712_VENDOR_ID,
 		WM9712_VENDOR_ID_MASK);
@@ -629,15 +642,8 @@ static int wm9712_soc_resume(struct snd_soc_codec *codec)
 
 	snd_soc_codec_force_bias_level(codec, SND_SOC_BIAS_STANDBY);
 
-	if (ret == 0) {
-		/* Sync reg_cache with the hardware after cold reset */
-		for (i = 2; i < ARRAY_SIZE(wm9712_reg) << 1; i += 2) {
-			if (i == AC97_INT_PAGING || i == AC97_POWERDOWN ||
-			    (i > 0x58 && i != 0x5c))
-				continue;
-			soc_ac97_ops->write(wm9712->ac97, i, cache[i>>1]);
-		}
-	}
+	if (ret == 0)
+		regcache_sync(codec->component.regmap);
 
 	return ret;
 }
@@ -645,6 +651,7 @@ static int wm9712_soc_resume(struct snd_soc_codec *codec)
 static int wm9712_soc_probe(struct snd_soc_codec *codec)
 {
 	struct wm9712_priv *wm9712 = snd_soc_codec_get_drvdata(codec);
+	struct regmap *regmap;
 	int ret;
 
 	wm9712->ac97 = snd_soc_new_ac97_codec(codec, WM9712_VENDOR_ID,
@@ -655,16 +662,28 @@ static int wm9712_soc_probe(struct snd_soc_codec *codec)
 		return ret;
 	}
 
+	regmap = regmap_init_ac97(wm9712->ac97, &wm9712_regmap_config);
+	if (IS_ERR(regmap)) {
+		ret = PTR_ERR(regmap);
+		goto err_free_ac97_codec;
+	}
+
+	snd_soc_codec_init_regmap(codec, regmap);
+
 	/* set alc mux to none */
 	ac97_write(codec, AC97_VIDEO, ac97_read(codec, AC97_VIDEO) | 0x3000);
 
 	return 0;
+err_free_ac97_codec:
+	snd_soc_free_ac97_codec(wm9712->ac97);
+	return ret;
 }
 
 static int wm9712_soc_remove(struct snd_soc_codec *codec)
 {
 	struct wm9712_priv *wm9712 = snd_soc_codec_get_drvdata(codec);
 
+	snd_soc_codec_exit_regmap(codec);
 	snd_soc_free_ac97_codec(wm9712->ac97);
 	return 0;
 }
@@ -673,14 +692,8 @@ static const struct snd_soc_codec_driver soc_codec_dev_wm9712 = {
 	.probe = 	wm9712_soc_probe,
 	.remove = 	wm9712_soc_remove,
 	.resume =	wm9712_soc_resume,
-	.read = ac97_read,
-	.write = ac97_write,
 	.set_bias_level = wm9712_set_bias_level,
 	.suspend_bias_off = true,
-	.reg_cache_size = ARRAY_SIZE(wm9712_reg),
-	.reg_word_size = sizeof(u16),
-	.reg_cache_step = 2,
-	.reg_cache_default = wm9712_reg,
 
 	.component_driver = {
 		.controls		= wm9712_snd_ac97_controls,