linux-kernel - [PATCH 3.16 163/305] iio: proximity: as3935: correct IIO_CHAN_INFO

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Message-ID: <lsq.1471110171.804499021@decadent.org.uk>
Date:	Sat, 13 Aug 2016 18:42:51 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Jonathan Cameron" <jic23@...nel.org>,
	"Matt Ranostay" <mranostay@...il.com>
Subject: [PATCH 3.16 163/305] iio: proximity: as3935: correct
 IIO_CHAN_INFO_RAW output

3.16.37-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Matt Ranostay <mranostay@...il.com>

commit 5138806f16c74c7cb8ac3e408a859c79eb7c9567 upstream.

IIO_CHAN_INFO_RAW was returning processed data which was incorrect.
This also adds the IIO_CHAN_INFO_SCALE value to convert to a processed value.

Signed-off-by: Matt Ranostay <mranostay@...il.com>
Signed-off-by: Jonathan Cameron <jic23@...nel.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 Documentation/ABI/testing/sysfs-bus-iio-proximity-as3935 |  2 +-
 drivers/iio/proximity/as3935.c                           | 10 ++++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

--- a/Documentation/ABI/testing/sysfs-bus-iio-proximity-as3935
+++ b/Documentation/ABI/testing/sysfs-bus-iio-proximity-as3935
@@ -1,4 +1,4 @@
-What		/sys/bus/iio/devices/iio:deviceX/in_proximity_raw
+What		/sys/bus/iio/devices/iio:deviceX/in_proximity_input
 Date:		March 2014
 KernelVersion:	3.15
 Contact:	Matt Ranostay <mranostay@...il.com>
--- a/drivers/iio/proximity/as3935.c
+++ b/drivers/iio/proximity/as3935.c
@@ -72,7 +72,8 @@ static const struct iio_chan_spec as3935
 		.type           = IIO_PROXIMITY,
 		.info_mask_separate =
 			BIT(IIO_CHAN_INFO_RAW) |
-			BIT(IIO_CHAN_INFO_PROCESSED),
+			BIT(IIO_CHAN_INFO_PROCESSED) |
+			BIT(IIO_CHAN_INFO_SCALE),
 		.scan_index     = 0,
 		.scan_type = {
 			.sign           = 'u',
@@ -181,7 +182,12 @@ static int as3935_read_raw(struct iio_de
 		/* storm out of range */
 		if (*val == AS3935_DATA_MASK)
 			return -EINVAL;
-		*val *= 1000;
+
+		if (m == IIO_CHAN_INFO_PROCESSED)
+			*val *= 1000;
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 1000;
 		break;
 	default:
 		return -EINVAL;