staging: iio: ad7780: generates pattern_mask from PAT bits

Previously, all pattern_masks and patterns in the chip_info table were
hardcoded. Now they are generated using the PAT macros, as described in
the datasheets.
Signed-off-by: Giuliano Belinassi <giuliano.belinassi@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/staging/iio/adc/ad7780.c

@@ -22,14 +22,22 @@
 #include <linux/iio/sysfs.h>
 #include <linux/iio/adc/ad_sigma_delta.h>
 
-#define AD7780_RDY	BIT(7)
-#define AD7780_FILTER	BIT(6)
-#define AD7780_ERR	BIT(5)
-#define AD7780_ID1	BIT(4)
-#define AD7780_ID0	BIT(3)
-#define AD7780_GAIN	BIT(2)
-#define AD7780_PAT1	BIT(1)
-#define AD7780_PAT0	BIT(0)
+#define AD7780_RDY		BIT(7)
+#define AD7780_FILTER		BIT(6)
+#define AD7780_ERR		BIT(5)
+#define AD7780_ID1		BIT(4)
+#define AD7780_ID0		BIT(3)
+#define AD7780_GAIN		BIT(2)
+#define AD7780_PAT1		BIT(1)
+#define AD7780_PAT0		BIT(0)
+
+#define AD7780_PATTERN		(AD7780_PAT0)
+#define AD7780_PATTERN_MASK	(AD7780_PAT0 | AD7780_PAT1)
+
+#define AD7170_PAT2		BIT(2)
+
+#define AD7170_PATTERN		(AD7780_PAT0 | AD7170_PAT2)
+#define AD7170_PATTERN_MASK	(AD7780_PAT0 | AD7780_PAT1 | AD7170_PAT2)
 
 struct ad7780_chip_info {
 	struct iio_chan_spec	channel;
@@ -136,26 +144,26 @@ static const struct ad_sigma_delta_info ad7780_sigma_delta_info = {
 static const struct ad7780_chip_info ad7780_chip_info_tbl[] = {
 	[ID_AD7170] = {
 		.channel = AD7780_CHANNEL(12, 24),
-		.pattern = 0x5,
-		.pattern_mask = 0x7,
+		.pattern = AD7170_PATTERN,
+		.pattern_mask = AD7170_PATTERN_MASK,
 		.is_ad778x = false,
 	},
 	[ID_AD7171] = {
 		.channel = AD7780_CHANNEL(16, 24),
-		.pattern = 0x5,
-		.pattern_mask = 0x7,
+		.pattern = AD7170_PATTERN,
+		.pattern_mask = AD7170_PATTERN_MASK,
 		.is_ad778x = false,
 	},
 	[ID_AD7780] = {
 		.channel = AD7780_CHANNEL(24, 32),
-		.pattern = 0x1,
-		.pattern_mask = 0x3,
+		.pattern = AD7780_PATTERN,
+		.pattern_mask = AD7780_PATTERN_MASK,
 		.is_ad778x = true,
 	},
 	[ID_AD7781] = {
 		.channel = AD7780_CHANNEL(20, 32),
-		.pattern = 0x1,
-		.pattern_mask = 0x3,
+		.pattern = AD7780_PATTERN,
+		.pattern_mask = AD7780_PATTERN_MASK,
 		.is_ad778x = true,
 	},
 };