ASoC: stac9766: Convert to regmap

Currently the stac9766 driver still uses custom snd_soc_codec_driver IO
callbacks. This has been deprecated for a while, so convert the stac9766
driver to use regmap for its IO.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/stac9766.c

@@ -18,6 +18,7 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/device.h>
+#include <linux/regmap.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/ac97_codec.h>
@@ -33,26 +34,49 @@
 #define AC97_STAC_ANALOG_SPECIAL 0x6E
 #define AC97_STAC_STEREO_MIC 0x78
 
-/*
- * STAC9766 register cache
- */
-static const u16 stac9766_reg[] = {
-	0x6A90, 0x8000, 0x8000, 0x8000, /* 6 */
-	0x0000, 0x0000, 0x8008, 0x8008, /* e */
-	0x8808, 0x8808, 0x8808, 0x8808, /* 16 */
-	0x8808, 0x0000, 0x8000, 0x0000, /* 1e */
-	0x0000, 0x0000, 0x0000, 0x000f, /* 26 */
-	0x0a05, 0x0400, 0xbb80, 0x0000, /* 2e */
-	0x0000, 0xbb80, 0x0000, 0x0000, /* 36 */
-	0x0000, 0x2000, 0x0000, 0x0100, /* 3e */
-	0x0000, 0x0000, 0x0080, 0x0000, /* 46 */
-	0x0000, 0x0000, 0x0003, 0xffff, /* 4e */
-	0x0000, 0x0000, 0x0000, 0x0000, /* 56 */
-	0x4000, 0x0000, 0x0000, 0x0000, /* 5e */
-	0x1201, 0x0000, 0x0000, 0x0000, /* 66 */
-	0x0000, 0x0000, 0x0000, 0x1000, /* 6e */
-	0x0000, 0x0000, 0x0000, 0x0006, /* 76 */
-	0x0000, 0x0000, 0x0000, 0x0000, /* 7e */
+static const struct reg_default stac9766_reg_defaults[] = {
+	{ 0x02, 0x8000 },
+	{ 0x04, 0x8000 },
+	{ 0x06, 0x8000 },
+	{ 0x0a, 0x0000 },
+	{ 0x0c, 0x8008 },
+	{ 0x0e, 0x8008 },
+	{ 0x10, 0x8808 },
+	{ 0x12, 0x8808 },
+	{ 0x14, 0x8808 },
+	{ 0x16, 0x8808 },
+	{ 0x18, 0x8808 },
+	{ 0x1a, 0x0000 },
+	{ 0x1c, 0x8000 },
+	{ 0x20, 0x0000 },
+	{ 0x22, 0x0000 },
+	{ 0x28, 0x0a05 },
+	{ 0x2c, 0xbb80 },
+	{ 0x32, 0xbb80 },
+	{ 0x3a, 0x2000 },
+	{ 0x3e, 0x0100 },
+	{ 0x4c, 0x0300 },
+	{ 0x4e, 0xffff },
+	{ 0x50, 0x0000 },
+	{ 0x52, 0x0000 },
+	{ 0x54, 0x0000 },
+	{ 0x6a, 0x0000 },
+	{ 0x6e, 0x1000 },
+	{ 0x72, 0x0000 },
+	{ 0x78, 0x0000 },
+};
+
+static const struct regmap_config stac9766_regmap_config = {
+	.reg_bits = 16,
+	.reg_stride = 2,
+	.val_bits = 16,
+	.max_register = 0x78,
+	.cache_type = REGCACHE_RBTREE,
+
+	.volatile_reg = regmap_ac97_default_volatile,
+
+	.reg_defaults = stac9766_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(stac9766_reg_defaults),
 };
 
 static const char *stac9766_record_mux[] = {"Mic", "CD", "Video", "AUX",
@@ -144,34 +168,13 @@ static const struct snd_kcontrol_new stac9766_snd_ac97_controls[] = {
 static int stac9766_ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 			       unsigned int val)
 {
-	struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
-	u16 *cache = codec->reg_cache;
-
-	if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
-		return -EIO;
-
-	soc_ac97_ops->write(ac97, reg, val);
-	cache[reg / 2] = val;
-	return 0;
+	return snd_soc_write(codec, reg, val);
 }
 
 static unsigned int stac9766_ac97_read(struct snd_soc_codec *codec,
 				       unsigned int reg)
 {
-	struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
-	u16 val = 0, *cache = codec->reg_cache;
-
-	if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
-		return -EIO;
-
-	if (reg == AC97_RESET || reg == AC97_GPIO_STATUS ||
-		reg == AC97_INT_PAGING || reg == AC97_VENDOR_ID1 ||
-		reg == AC97_VENDOR_ID2) {
-
-		val = soc_ac97_ops->read(ac97, reg);
-		return val;
-	}
-	return cache[reg / 2];
+	return snd_soc_read(codec, reg);
 }
 
 static int ac97_analog_prepare(struct snd_pcm_substream *substream,
@@ -290,21 +293,34 @@ static struct snd_soc_dai_driver stac9766_dai[] = {
 static int stac9766_codec_probe(struct snd_soc_codec *codec)
 {
 	struct snd_ac97 *ac97;
+	struct regmap *regmap;
+	int ret;
 
 	ac97 = snd_soc_new_ac97_codec(codec, STAC9766_VENDOR_ID,
 			STAC9766_VENDOR_ID_MASK);
 	if (IS_ERR(ac97))
 		return PTR_ERR(ac97);
 
+	regmap = regmap_init_ac97(ac97, &stac9766_regmap_config);
+	if (IS_ERR(regmap)) {
+		ret = PTR_ERR(regmap);
+		goto err_free_ac97;
+	}
+
+	snd_soc_codec_init_regmap(codec, regmap);
 	snd_soc_codec_set_drvdata(codec, ac97);
 
 	return 0;
+err_free_ac97:
+	snd_soc_free_ac97_codec(ac97);
+	return ret;
 }
 
 static int stac9766_codec_remove(struct snd_soc_codec *codec)
 {
 	struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
 
+	snd_soc_codec_exit_regmap(codec);
 	snd_soc_free_ac97_codec(ac97);
 	return 0;
 }
@@ -314,17 +330,11 @@ static struct snd_soc_codec_driver soc_codec_dev_stac9766 = {
 		.controls		= stac9766_snd_ac97_controls,
 		.num_controls		= ARRAY_SIZE(stac9766_snd_ac97_controls),
 	},
-	.write = stac9766_ac97_write,
-	.read = stac9766_ac97_read,
 	.set_bias_level = stac9766_set_bias_level,
 	.suspend_bias_off = true,
 	.probe = stac9766_codec_probe,
 	.remove = stac9766_codec_remove,
 	.resume = stac9766_codec_resume,
-	.reg_cache_size = ARRAY_SIZE(stac9766_reg),
-	.reg_word_size = sizeof(u16),
-	.reg_cache_step = 2,
-	.reg_cache_default = stac9766_reg,
 };
 
 static int stac9766_probe(struct platform_device *pdev)