linux-kernel - [PATCH v7 1/2] iio: core: Introduce IIO_VAL_INT

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Date:   Sun, 24 Oct 2021 12:16:26 +0300
From:   Andriy Tryshnivskyy <andriy.tryshnivskyy@...nsynergy.com>
To:     jbhayana@...gle.com, jic23@...nel.org
Cc:     lars@...afoo.de, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org, Vasyl.Vavrychuk@...nsynergy.com,
        andy.shevchenko@...il.com, andriy.tryshnivskyy@...nsynergy.com
Subject: [PATCH v7 1/2] iio: core: Introduce IIO_VAL_INT_64.

Introduce IIO_VAL_INT_64 to read 64-bit value for
channel attribute. Val is used as lower 32 bits.

Signed-off-by: Andriy Tryshnivskyy <andriy.tryshnivskyy@...nsynergy.com>
---
 drivers/iio/industrialio-core.c | 3 +++
 include/linux/iio/types.h       | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 6d2175eb7af2..49e42d04ea16 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -702,6 +702,9 @@ static ssize_t __iio_format_value(char *buf, size_t offset, unsigned int type,
 	}
 	case IIO_VAL_CHAR:
 		return sysfs_emit_at(buf, offset, "%c", (char)vals[0]);
+	case IIO_VAL_INT_64:
+		tmp2 = (s64)((((u64)vals[1]) << 32) | (u32)vals[0]);
+		return sysfs_emit_at(buf, offset, "%lld", tmp2);
 	default:
 		return 0;
 	}
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 84b3f8175cc6..bb6578a5ee28 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -24,6 +24,7 @@ enum iio_event_info {
 #define IIO_VAL_INT_PLUS_NANO 3
 #define IIO_VAL_INT_PLUS_MICRO_DB 4
 #define IIO_VAL_INT_MULTIPLE 5
+#define IIO_VAL_INT_64 6 /* 64-bit data, val is lower 32 bits) */
 #define IIO_VAL_FRACTIONAL 10
 #define IIO_VAL_FRACTIONAL_LOG2 11
 #define IIO_VAL_CHAR 12
-- 
2.17.1