[3.16.y-ckt stable] Patch "iio: mxs-lradc: fix iio channel map regression" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    iio: mxs-lradc: fix iio channel map regression

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt9.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

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>From 38d82d26d74c2cd72c22d8239d9522a16c347938 Mon Sep 17 00:00:00 2001
From: Stefan Wahren <stefan.wahren at i2se.com>
Date: Sat, 3 Jan 2015 20:34:12 +0000
Subject: iio: mxs-lradc: fix iio channel map regression

commit 03305e535cd5cdc1079b32909bf4b2dd67d46f7f upstream.

Since commit c8231a9af8147f8a ("iio: mxs-lradc: compute temperature
from channel 8 and 9") with the removal of adc channel 9 there is
no 1-1 mapping in the channel spec.

All hwmon channel values above 9 are accessible via there index minus
one. So add a hidden iio channel 9 to fix this issue.

Signed-off-by: Stefan Wahren <stefan.wahren at i2se.com>
Acked-by: Alexandre Belloni <alexandre.belloni at free-electrons.com>
Reviewed-by: Marek Vasut <marex at denx.de>
Signed-off-by: Jonathan Cameron <jic23 at kernel.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/staging/iio/adc/mxs-lradc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c
index 4907efaf5e3d..37a1192f1637 100644
--- a/drivers/staging/iio/adc/mxs-lradc.c
+++ b/drivers/staging/iio/adc/mxs-lradc.c
@@ -1402,6 +1402,13 @@ static const struct iio_chan_spec mxs_lradc_chan_spec[] = {
 		.channel = 8,
 		.scan_type = {.sign = 'u', .realbits = 18, .storagebits = 32,},
 	},
+	/* Hidden channel to keep indexes */
+	{
+		.type = IIO_TEMP,
+		.indexed = 1,
+		.scan_index = -1,
+		.channel = 9,
+	},
 	MXS_ADC_CHAN(10, IIO_VOLTAGE),	/* VDDIO */
 	MXS_ADC_CHAN(11, IIO_VOLTAGE),	/* VTH */
 	MXS_ADC_CHAN(12, IIO_VOLTAGE),	/* VDDA */