1 files changed, 78 insertions, 83 deletions

diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
index d5ac422d73b2..1212d6b7f316 100644
--- a/drivers/hwmon/ds1621.c
+++ b/drivers/hwmon/ds1621.c
@@ -27,6 +27,7 @@
 #include <linux/jiffies.h>
 #include <linux/i2c.h>
 #include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
 #include <linux/err.h>
 #include <linux/mutex.h>
 #include <linux/sysfs.h>
@@ -52,9 +53,11 @@ MODULE_PARM_DESC(polarity, "Output's polarity: 0 = active high, 1 = active low")
 #define DS1621_REG_CONFIG_DONE          0x80
 
 /* The DS1621 registers */
-#define DS1621_REG_TEMP                 0xAA /* word, RO */
-#define DS1621_REG_TEMP_MIN             0xA2 /* word, RW */
-#define DS1621_REG_TEMP_MAX             0xA1 /* word, RW */
+static const u8 DS1621_REG_TEMP[3] = {
+        0xAA,           /* input, word, RO */
+        0xA2,           /* min, word, RW */
+        0xA1,           /* max, word, RW */
+};
 #define DS1621_REG_CONF                 0xAC /* byte, RW */
 #define DS1621_COM_START                0xEE /* no data */
 #define DS1621_COM_STOP                 0x22 /* no data */
@@ -63,10 +66,7 @@ MODULE_PARM_DESC(polarity, "Output's polarity: 0 = active high, 1 = active low")
 #define DS1621_ALARM_TEMP_HIGH          0x40
 #define DS1621_ALARM_TEMP_LOW           0x20
 
-/* Conversions. Rounding and limit checking is only done on the TO_REG
-   variants. Note that you should be a bit careful with which arguments
-   these macros are called: arguments may be evaluated more than once.
-   Fixing this is just not worth it. */
+/* Conversions */
 #define ALARMS_FROM_REG(val) ((val) & \
                               (DS1621_ALARM_TEMP_HIGH | DS1621_ALARM_TEMP_LOW))
 
@@ -78,7 +78,7 @@ struct ds1621_data {
         char valid;                     /* !=0 if following fields are valid */
         unsigned long last_updated;     /* In jiffies */
 
-        u16 temp, temp_min, temp_max;   /* Register values, word */
+        u16 temp[3];                    /* Register values, word */
         u8 conf;                        /* Register encoding, combined */
 };
 
@@ -101,7 +101,7 @@ static struct i2c_driver ds1621_driver = {
 
 /* All registers are word-sized, except for the configuration register.
    DS1621 uses a high-byte first convention, which is exactly opposite to
-   the usual practice. */
+   the SMBus standard. */
 static int ds1621_read_value(struct i2c_client *client, u8 reg)
 {
         if (reg == DS1621_REG_CONF)
@@ -110,9 +110,6 @@ static int ds1621_read_value(struct i2c_client *client, u8 reg)
                 return swab16(i2c_smbus_read_word_data(client, reg));
 }
 
-/* All registers are word-sized, except for the configuration register.
-   DS1621 uses a high-byte first convention, which is exactly opposite to
-   the usual practice. */
 static int ds1621_write_value(struct i2c_client *client, u8 reg, u16 value)
 {
         if (reg == DS1621_REG_CONF)
@@ -139,50 +136,61 @@ static void ds1621_init_client(struct i2c_client *client)
         i2c_smbus_write_byte(client, DS1621_COM_START);
 }
 
-#define show(value)                                                     \
-static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf)               \
-{                                                                       \
-        struct ds1621_data *data = ds1621_update_client(dev);           \
-        return sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(data->value));   \
+static ssize_t show_temp(struct device *dev, struct device_attribute *da,
+                         char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+        struct ds1621_data *data = ds1621_update_client(dev);
+        return sprintf(buf, "%d\n",
+                       LM75_TEMP_FROM_REG(data->temp[attr->index]));
 }
 
-show(temp);
-show(temp_min);
-show(temp_max);
-
-#define set_temp(suffix, value, reg)                                    \
-static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf,    \
-                                 size_t count)                          \
-{                                                                       \
-        struct i2c_client *client = to_i2c_client(dev);                 \
-        struct ds1621_data *data = ds1621_update_client(dev);           \
-        u16 val = LM75_TEMP_TO_REG(simple_strtoul(buf, NULL, 10));      \
-                                                                        \
-        mutex_lock(&data->update_lock);                                 \
-        data->value = val;                                              \
-        ds1621_write_value(client, reg, data->value);                   \
-        mutex_unlock(&data->update_lock);                               \
-        return count;                                                   \
-}
+static ssize_t set_temp(struct device *dev, struct device_attribute *da,
+                        const char *buf, size_t count)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+        struct i2c_client *client = to_i2c_client(dev);
+        struct ds1621_data *data = ds1621_update_client(dev);
+        u16 val = LM75_TEMP_TO_REG(simple_strtoul(buf, NULL, 10));
 
-set_temp(min, temp_min, DS1621_REG_TEMP_MIN);
-set_temp(max, temp_max, DS1621_REG_TEMP_MAX);
+        mutex_lock(&data->update_lock);
+        data->temp[attr->index] = val;
+        ds1621_write_value(client, DS1621_REG_TEMP[attr->index],
+                           data->temp[attr->index]);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
 
-static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t show_alarms(struct device *dev, struct device_attribute *da,
+                           char *buf)
 {
         struct ds1621_data *data = ds1621_update_client(dev);
         return sprintf(buf, "%d\n", ALARMS_FROM_REG(data->conf));
 }
 
+static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
+                          char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+        struct ds1621_data *data = ds1621_update_client(dev);
+        return sprintf(buf, "%d\n", !!(data->conf & attr->index));
+}
+
 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
-static DEVICE_ATTR(temp1_input, S_IRUGO , show_temp, NULL);
-static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO , show_temp_min, set_temp_min);
-static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, set_temp_max);
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp, set_temp, 1);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp, set_temp, 2);
+static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
+                DS1621_ALARM_TEMP_LOW);
+static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
+                DS1621_ALARM_TEMP_HIGH);
 
 static struct attribute *ds1621_attributes[] = {
-        &dev_attr_temp1_input.attr,
-        &dev_attr_temp1_min.attr,
-        &dev_attr_temp1_max.attr,
+        &sensor_dev_attr_temp1_input.dev_attr.attr,
+        &sensor_dev_attr_temp1_min.dev_attr.attr,
+        &sensor_dev_attr_temp1_max.dev_attr.attr,
+        &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
         &dev_attr_alarms.attr,
         NULL
 };
@@ -204,9 +212,9 @@ static int ds1621_detect(struct i2c_adapter *adapter, int address,
                          int kind)
 {
         int conf, temp;
-        struct i2c_client *new_client;
+        struct i2c_client *client;
         struct ds1621_data *data;
-        int err = 0;
+        int i, err = 0;
 
         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA 
                                      | I2C_FUNC_SMBUS_WORD_DATA 
@@ -221,55 +229,44 @@ static int ds1621_detect(struct i2c_adapter *adapter, int address,
                 goto exit;
         }
         
-        new_client = &data->client;
-        i2c_set_clientdata(new_client, data);
-        new_client->addr = address;
-        new_client->adapter = adapter;
-        new_client->driver = &ds1621_driver;
-        new_client->flags = 0;
-
+        client = &data->client;
+        i2c_set_clientdata(client, data);
+        client->addr = address;
+        client->adapter = adapter;
+        client->driver = &ds1621_driver;
 
         /* Now, we do the remaining detection. It is lousy. */
         if (kind < 0) {
                 /* The NVB bit should be low if no EEPROM write has been 
                    requested during the latest 10ms, which is highly 
                    improbable in our case. */
-                conf = ds1621_read_value(new_client, DS1621_REG_CONF);
+                conf = ds1621_read_value(client, DS1621_REG_CONF);
                 if (conf & DS1621_REG_CONFIG_NVB)
                         goto exit_free;
                 /* The 7 lowest bits of a temperature should always be 0. */
-                temp = ds1621_read_value(new_client, DS1621_REG_TEMP);
-                if (temp & 0x007f)
-                        goto exit_free;
-                temp = ds1621_read_value(new_client, DS1621_REG_TEMP_MIN);
-                if (temp & 0x007f)
-                        goto exit_free;
-                temp = ds1621_read_value(new_client, DS1621_REG_TEMP_MAX);
-                if (temp & 0x007f)
-                        goto exit_free;
+                for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
+                        temp = ds1621_read_value(client, DS1621_REG_TEMP[i]);
+                        if (temp & 0x007f)
+                                goto exit_free;
+                }
         }
 
-        /* Determine the chip type - only one kind supported! */
-        if (kind <= 0)
-                kind = ds1621;
-
         /* Fill in remaining client fields and put it into the global list */
-        strlcpy(new_client->name, "ds1621", I2C_NAME_SIZE);
-        data->valid = 0;
+        strlcpy(client->name, "ds1621", I2C_NAME_SIZE);
         mutex_init(&data->update_lock);
 
         /* Tell the I2C layer a new client has arrived */
-        if ((err = i2c_attach_client(new_client)))
+        if ((err = i2c_attach_client(client)))
                 goto exit_free;
 
         /* Initialize the DS1621 chip */
-        ds1621_init_client(new_client);
+        ds1621_init_client(client);
 
         /* Register sysfs hooks */
-        if ((err = sysfs_create_group(&new_client->dev.kobj, &ds1621_group)))
+        if ((err = sysfs_create_group(&client->dev.kobj, &ds1621_group)))
                 goto exit_detach;
 
-        data->class_dev = hwmon_device_register(&new_client->dev);
+        data->class_dev = hwmon_device_register(&client->dev);
         if (IS_ERR(data->class_dev)) {
                 err = PTR_ERR(data->class_dev);
                 goto exit_remove_files;
@@ -278,9 +275,9 @@ static int ds1621_detect(struct i2c_adapter *adapter, int address,
         return 0;
 
       exit_remove_files:
-        sysfs_remove_group(&new_client->dev.kobj, &ds1621_group);
+        sysfs_remove_group(&client->dev.kobj, &ds1621_group);
       exit_detach:
-        i2c_detach_client(new_client);
+        i2c_detach_client(client);
       exit_free:
         kfree(data);
       exit:
@@ -314,23 +311,21 @@ static struct ds1621_data *ds1621_update_client(struct device *dev)
 
         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
             || !data->valid) {
+                int i;
 
                 dev_dbg(&client->dev, "Starting ds1621 update\n");
 
                 data->conf = ds1621_read_value(client, DS1621_REG_CONF);
 
-                data->temp = ds1621_read_value(client, DS1621_REG_TEMP);
-                
-                data->temp_min = ds1621_read_value(client,
-                                                    DS1621_REG_TEMP_MIN);
-                data->temp_max = ds1621_read_value(client,
-                                                    DS1621_REG_TEMP_MAX);
+                for (i = 0; i < ARRAY_SIZE(data->temp); i++)
+                        data->temp[i] = ds1621_read_value(client,
+                                                          DS1621_REG_TEMP[i]);
 
                 /* reset alarms if necessary */
                 new_conf = data->conf;
-                if (data->temp > data->temp_min)
+                if (data->temp[0] > data->temp[1])      /* input > min */
                         new_conf &= ~DS1621_ALARM_TEMP_LOW;
-                if (data->temp < data->temp_max)
+                if (data->temp[0] < data->temp[2])      /* input < max */
                         new_conf &= ~DS1621_ALARM_TEMP_HIGH;
                 if (data->conf != new_conf)
                         ds1621_write_value(client, DS1621_REG_CONF,