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From: Guenter Roeck <linux@roeck-us.net>
To: Hardware Monitoring <linux-hwmon@vger.kernel.org>
Cc: Jean Delvare <jdelvare@suse.de>, Guenter Roeck <linux@roeck-us.net>
Subject: [PATCH 3/4] hwmon: (lm75) Add update_interval attribute
Date: Thu, 23 Jun 2016 17:50:00 -0700	[thread overview]
Message-ID: <1466729401-27567-3-git-send-email-linux@roeck-us.net> (raw)
In-Reply-To: <1466729401-27567-1-git-send-email-linux@roeck-us.net>

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

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 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

  parent reply	other threads:[~2016-06-24  0:50 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-24  0:49 [PATCH 1/4] hwmon: (lm75) Handle cleanup with devm_add_action Guenter Roeck
2016-06-24  0:49 ` [PATCH 2/4] hwmon: (lm75) Drop lm75_read_value and lm75_write_value Guenter Roeck
2016-06-24  0:50 ` Guenter Roeck [this message]
2016-06-24  0:50 ` [PATCH 4/4] hwmon: (lm75) Convert to use regmap Guenter Roeck

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