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

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Date:   Thu, 28 Feb 2019 11:24:55 -0300
From:   Renato Lui Geh <renatogeh@...il.com>
To:     lars@...afoo.de, Michael.Hennerich@...log.com, jic23@...nel.org,
        knaack.h@....de, pmeerw@...erw.net, gregkh@...uxfoundation.org,
        stefan.popa@...log.com, alexandru.Ardelean@...log.com,
        giuliano.belinassi@....br, robh+dt@...nel.org, mark.rutland@....com
Cc:     linux-iio@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, kernel-usp@...glegroups.com,
        devicetree@...r.kernel.org
Subject: [PATCH v4 4/9] staging:iio:ad7780: add chip ID values and mask

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@...il.com>
---
 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