iio:ad5064: Use a enum for the register map layout type

Currently the ad5064 only supports two different register map variations
and this is represented by a bool. This patch changes since to a enum so
we can support more variations in the future.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/dac/ad5064.c

@@ -49,6 +49,16 @@
 #define AD5064_LDAC_PWRDN_100K			0x2
 #define AD5064_LDAC_PWRDN_3STATE		0x3
 
+/**
+ * enum ad5064_regmap_type - Register layout variant
+ * @AD5064_REGMAP_ADI: Analog Devices register map layout
+ * @AD5064_REGMAP_LTC: LTC register map layout
+ */
+enum ad5064_regmap_type {
+	AD5064_REGMAP_ADI,
+	AD5064_REGMAP_LTC,
+};
+
 /**
  * struct ad5064_chip_info - chip specific information
  * @shared_vref:	whether the vref supply is shared between channels
@@ -56,8 +66,7 @@
 			internal vref.
  * @channel:		channel specification
  * @num_channels:	number of channels
- * @powerdown_ltc:	Use alternative power down addressing as required by
- *			ltc2617 and others.
+ * @regmap_type:	register map layout variant
  */
 
 struct ad5064_chip_info {
@@ -65,7 +74,7 @@ struct ad5064_chip_info {
 	unsigned long internal_vref;
 	const struct iio_chan_spec *channels;
 	unsigned int num_channels;
-	bool powerdown_ltc;
+	enum ad5064_regmap_type regmap_type;
 };
 
 struct ad5064_state;
@@ -153,7 +162,7 @@ static int ad5064_sync_powerdown_mode(struct ad5064_state *st,
 	unsigned int val, address;
 	int ret;
 
-	if (st->chip_info->powerdown_ltc) {
+	if (st->chip_info->regmap_type == AD5064_REGMAP_LTC) {
 		val = 0;
 		address = chan->address;
 	} else {
@@ -393,171 +402,190 @@ static const struct ad5064_chip_info ad5064_chip_info_tbl[] = {
 		.shared_vref = false,
 		.channels = ad5024_channels,
 		.num_channels = 4,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5025] = {
 		.shared_vref = false,
 		.channels = ad5025_channels,
 		.num_channels = 2,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5044] = {
 		.shared_vref = false,
 		.channels = ad5044_channels,
 		.num_channels = 4,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5045] = {
 		.shared_vref = false,
 		.channels = ad5045_channels,
 		.num_channels = 2,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5064] = {
 		.shared_vref = false,
 		.channels = ad5064_channels,
 		.num_channels = 4,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5064_1] = {
 		.shared_vref = true,
 		.channels = ad5064_channels,
 		.num_channels = 4,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5065] = {
 		.shared_vref = false,
 		.channels = ad5065_channels,
 		.num_channels = 2,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5628_1] = {
 		.shared_vref = true,
 		.internal_vref = 2500000,
 		.channels = ad5024_channels,
 		.num_channels = 8,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5628_2] = {
 		.shared_vref = true,
 		.internal_vref = 5000000,
 		.channels = ad5024_channels,
 		.num_channels = 8,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5629_1] = {
 		.shared_vref = true,
 		.internal_vref = 2500000,
 		.channels = ad5629_channels,
 		.num_channels = 8,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5629_2] = {
 		.shared_vref = true,
 		.internal_vref = 5000000,
 		.channels = ad5629_channels,
 		.num_channels = 8,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5648_1] = {
 		.shared_vref = true,
 		.internal_vref = 2500000,
 		.channels = ad5044_channels,
 		.num_channels = 8,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5648_2] = {
 		.shared_vref = true,
 		.internal_vref = 5000000,
 		.channels = ad5044_channels,
 		.num_channels = 8,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5666_1] = {
 		.shared_vref = true,
 		.internal_vref = 2500000,
 		.channels = ad5064_channels,
 		.num_channels = 4,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5666_2] = {
 		.shared_vref = true,
 		.internal_vref = 5000000,
 		.channels = ad5064_channels,
 		.num_channels = 4,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5668_1] = {
 		.shared_vref = true,
 		.internal_vref = 2500000,
 		.channels = ad5064_channels,
 		.num_channels = 8,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5668_2] = {
 		.shared_vref = true,
 		.internal_vref = 5000000,
 		.channels = ad5064_channels,
 		.num_channels = 8,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5669_1] = {
 		.shared_vref = true,
 		.internal_vref = 2500000,
 		.channels = ad5669_channels,
 		.num_channels = 8,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_AD5669_2] = {
 		.shared_vref = true,
 		.internal_vref = 5000000,
 		.channels = ad5669_channels,
 		.num_channels = 8,
+		.regmap_type = AD5064_REGMAP_ADI,
 	},
 	[ID_LTC2606] = {
 		.shared_vref = true,
 		.internal_vref = 0,
 		.channels = ltc2607_channels,
 		.num_channels = 1,
-		.powerdown_ltc = true,
+		.regmap_type = AD5064_REGMAP_LTC,
 	},
 	[ID_LTC2607] = {
 		.shared_vref = true,
 		.internal_vref = 0,
 		.channels = ltc2607_channels,
 		.num_channels = 2,
-		.powerdown_ltc = true,
+		.regmap_type = AD5064_REGMAP_LTC,
 	},
 	[ID_LTC2609] = {
 		.shared_vref = false,
 		.internal_vref = 0,
 		.channels = ltc2607_channels,
 		.num_channels = 4,
-		.powerdown_ltc = true,
+		.regmap_type = AD5064_REGMAP_LTC,
 	},
 	[ID_LTC2616] = {
 		.shared_vref = true,
 		.internal_vref = 0,
 		.channels = ltc2617_channels,
 		.num_channels = 1,
-		.powerdown_ltc = true,
+		.regmap_type = AD5064_REGMAP_LTC,
 	},
 	[ID_LTC2617] = {
 		.shared_vref = true,
 		.internal_vref = 0,
 		.channels = ltc2617_channels,
 		.num_channels = 2,
-		.powerdown_ltc = true,
+		.regmap_type = AD5064_REGMAP_LTC,
 	},
 	[ID_LTC2619] = {
 		.shared_vref = false,
 		.internal_vref = 0,
 		.channels = ltc2617_channels,
 		.num_channels = 4,
-		.powerdown_ltc = true,
+		.regmap_type = AD5064_REGMAP_LTC,
 	},
 	[ID_LTC2626] = {
 		.shared_vref = true,
 		.internal_vref = 0,
 		.channels = ltc2627_channels,
 		.num_channels = 1,
-		.powerdown_ltc = true,
+		.regmap_type = AD5064_REGMAP_LTC,
 	},
 	[ID_LTC2627] = {
 		.shared_vref = true,
 		.internal_vref = 0,
 		.channels = ltc2627_channels,
 		.num_channels = 2,
-		.powerdown_ltc = true,
+		.regmap_type = AD5064_REGMAP_LTC,
 	},
 	[ID_LTC2629] = {
 		.shared_vref = false,
 		.internal_vref = 0,
 		.channels = ltc2627_channels,
 		.num_channels = 4,
-		.powerdown_ltc = true,
+		.regmap_type = AD5064_REGMAP_LTC,
 	},
 };