linux-kernel - [PATCH v2 5/7] hwmon: (lm90) Introduce 3rd set of upper temperature limits

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Date:	Thu, 9 Sep 2010 06:25:48 -0700
From:	Guenter Roeck <guenter.roeck@...csson.com>
To:	Jean Delvare <khali@...ux-fr.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	lm-sensors@...sensors.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Guenter Roeck <guenter.roeck@...csson.com>
Subject: [PATCH v2 5/7] hwmon: (lm90) Introduce 3rd set of upper temperature limits

Signed-off-by: Guenter Roeck <guenter.roeck@...csson.com>
---
 drivers/hwmon/lm90.c |   34 ++++++++++++++++++++++++++++++++--
 1 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 11b5701..d2bcb47 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -147,6 +147,7 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, adt7461, max6680, max6646,
 #define	LM90_HAVE_OFFSET	0x02	/* temperature offset register	*/
 #define	LM90_HAVE_LOCAL_EXT	0x04	/* extended local temperature	*/
 #define	LM90_HAVE_REM_LIMIT_EXT	0x08	/* extended remote limit	*/
+#define	LM90_HAVE_EMERGENCY	0x10	/* 3rd upper (emergency) limit	*/
 
 /*
  * Functions declaration
@@ -213,10 +214,12 @@ struct lm90_data {
 	u8 alert_alarms;	/* Which alarm bits trigger ALERT# */
 
 	/* registers values */
-	s8 temp8[4];	/* 0: local low limit
+	s8 temp8[6];	/* 0: local low limit
 			   1: local high limit
 			   2: local critical limit
-			   3: remote critical limit */
+			   3: remote critical limit
+			   4: local emergency limit
+			   5: remote emergency limit */
 	s16 temp11[5];	/* 0: remote input
 			   1: remote low limit
 			   2: remote high limit
@@ -608,6 +611,24 @@ static const struct attribute_group lm90_group = {
 	.attrs = lm90_attributes,
 };
 
+/*
+ * Additional attributes for devices with emergency sensors
+ */
+static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
+	set_temp8, 4);
+static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
+	set_temp8, 5);
+
+static struct attribute *lm90_emergency_attributes[] = {
+	&sensor_dev_attr_temp1_emergency.dev_attr.attr,
+	&sensor_dev_attr_temp2_emergency.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group lm90_emergency_group = {
+	.attrs = lm90_emergency_attributes,
+};
+
 /* pec used for ADM1032 only */
 static ssize_t show_pec(struct device *dev, struct device_attribute *dummy,
 			char *buf)
@@ -818,6 +839,9 @@ static int lm90_detect(struct i2c_client *new_client,
 
 static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data)
 {
+	if (data->flags & LM90_HAVE_EMERGENCY)
+		sysfs_remove_group(&client->dev.kobj,
+				   &lm90_emergency_group);
 	if (data->flags & LM90_HAVE_OFFSET)
 		device_remove_file(&client->dev,
 				   &sensor_dev_attr_temp2_offset.dev_attr);
@@ -889,6 +913,12 @@ static int lm90_probe(struct i2c_client *new_client,
 		if (err)
 			goto exit_remove_files;
 	}
+	if (data->flags & LM90_HAVE_EMERGENCY) {
+		err = sysfs_create_group(&new_client->dev.kobj,
+					 &lm90_emergency_group);
+		if (err)
+			goto exit_remove_files;
+	}
 
 	data->hwmon_dev = hwmon_device_register(&new_client->dev);
 	if (IS_ERR(data->hwmon_dev)) {
-- 
1.7.0.87.g0901d

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