[3.16.y-ckt stable] Patch "hwmon: (ntc_thermistor) Ensure iio channel is of type IIO_VOLTAGE" has been added to staging queue
Luis Henriques
luis.henriques at canonical.com
Thu Jun 4 13:09:58 UTC 2015
This is a note to let you know that I have just added a patch titled
hwmon: (ntc_thermistor) Ensure iio channel is of type IIO_VOLTAGE
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/ubuntu/linux.git/log/?h=linux-3.16.y-queue
This patch is scheduled to be released in version 3.16.7-ckt13.
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
------
>From cf1e5c956c7bf069dd893174db0105131310d200 Mon Sep 17 00:00:00 2001
From: Chris Lesiak <chris.lesiak at licor.com>
Date: Tue, 26 May 2015 15:40:44 -0500
Subject: hwmon: (ntc_thermistor) Ensure iio channel is of type IIO_VOLTAGE
commit adba657533bdd255f7b78bc8a324091f46b294cd upstream.
When configured via device tree, the associated iio device needs to be
measuring voltage for the conversion to resistance to be correct.
Return -EINVAL if that is not the case.
Signed-off-by: Chris Lesiak <chris.lesiak at licor.com>
Signed-off-by: Guenter Roeck <linux at roeck-us.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
drivers/hwmon/ntc_thermistor.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/hwmon/ntc_thermistor.c b/drivers/hwmon/ntc_thermistor.c
index ae66f42c4d6d..387ea83783df 100644
--- a/drivers/hwmon/ntc_thermistor.c
+++ b/drivers/hwmon/ntc_thermistor.c
@@ -193,8 +193,10 @@ static struct ntc_thermistor_platform_data *
ntc_thermistor_parse_dt(struct platform_device *pdev)
{
struct iio_channel *chan;
+ enum iio_chan_type type;
struct device_node *np = pdev->dev.of_node;
struct ntc_thermistor_platform_data *pdata;
+ int ret;
if (!np)
return NULL;
@@ -207,6 +209,13 @@ ntc_thermistor_parse_dt(struct platform_device *pdev)
if (IS_ERR(chan))
return ERR_CAST(chan);
+ ret = iio_get_channel_type(chan, &type);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ if (type != IIO_VOLTAGE)
+ return ERR_PTR(-EINVAL);
+
if (of_property_read_u32(np, "pullup-uv", &pdata->pullup_uv))
return ERR_PTR(-ENODEV);
if (of_property_read_u32(np, "pullup-ohm", &pdata->pullup_ohm))
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