[PATCH v3 3/4] hwmon: (lm75) Add update_interval attribute

From: Guenter Roeck
Date: Thu Jun 30 2016 - 02:45:42 EST


Since we know the chip's update interval, let's make it available
to the user.

Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
v2, v3: No change

drivers/hwmon/lm75.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 7b18cbd4a5ec..fe83f70ba62a 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -159,16 +159,29 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da,
return count;
}

+static ssize_t show_update_interval(struct device *dev,
+ struct device_attribute *da, char *buf)
+{
+ struct lm75_data *data = lm75_update_device(dev);
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return sprintf(buf, "%u\n", jiffies_to_msecs(data->sample_time));
+}
+
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
show_temp, set_temp, 1);
static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
show_temp, set_temp, 2);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+static DEVICE_ATTR(update_interval, S_IRUGO, show_update_interval, NULL);

static struct attribute *lm75_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
+ &dev_attr_update_interval.attr,

NULL
};
--
2.5.0