[PATCH 3.19 060/177] iio: mxs-lradc: fix iio channel map regression

Greg Kroah-Hartman
2015-03-16T15:44:53Z

From: Stefan Wahren <stefan.wahren@i2se.com>

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@i2se.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/staging/iio/adc/mxs-lradc.c | 7 +++++++
1 file changed, 7 insertions(+)

--- a/drivers/staging/iio/adc/mxs-lradc.c
+++ b/drivers/staging/iio/adc/mxs-lradc.c
@@ -1406,6 +1406,13 @@ static const struct iio_chan_spec mxs_lr
.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 */