[PATCH v4 4/9] staging:iio:ad7780: add chip ID values and mask

[Renato Lui Geh]

The ad7780 supports both the ad778x and ad717x families. Each chip has
a corresponding ID. This patch provides a mask for extracting ID values
from the status bits and also macros for the correct values for the
ad7170, ad7171, ad7780 and ad7781.

Signed-off-by: Renato Lui Geh <renatogeh@xxxxxxxxx>
---
drivers/staging/iio/adc/ad7780.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c
index 56c49e28f432..ad7617a3a141 100644
--- a/drivers/staging/iio/adc/ad7780.c
+++ b/drivers/staging/iio/adc/ad7780.c
@@ -26,10 +26,14 @@
#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 AD7170_ID		0
+#define AD7171_ID		1
+#define AD7780_ID		1
+#define AD7781_ID		0
+
+#define AD7780_ID_MASK		(BIT(3) | BIT(4))

#define AD7780_PATTERN_GOOD	1
#define AD7780_PATTERN_MASK	GENMASK(1, 0)
--
2.21.0