[PATCH] hwmon: adm9240 driver update - dynamic sysfs

hwmon: adm9240 update 2/2: convert to use dynamic sysfs accessors

This patch converts adm9240 to use Yani Ioannou's dynamic sysfs callbacks,
reducing driver memory footprint from 16312 to 14104 bytes on 2.6.14-rc1,
removing the old driver macro mess.

Run tested on Intel SE440BX-2 mobo.
Signed-off-by: Grant Coady <gcoady@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/hwmon/adm9240.c

@@ -45,6 +45,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
+#include <linux/hwmon-sysfs.h>
 #include <linux/hwmon.h>
 #include <linux/hwmon-vid.h>
 #include <linux/err.h>
@@ -69,8 +70,7 @@ I2C_CLIENT_INSMOD_3(adm9240, ds1780, lm81);
 #define ADM9240_REG_INT(nr)		(0x41 + (nr))
 #define ADM9240_REG_INT_MASK(nr)	(0x43 + (nr))
 #define ADM9240_REG_TEMP		0x27
-#define ADM9240_REG_TEMP_HIGH		0x39
-#define ADM9240_REG_TEMP_HYST		0x3a
+#define ADM9240_REG_TEMP_MAX(nr)	(0x39 + (nr)) /* 0, 1 = high, hyst */
 #define ADM9240_REG_ANALOG_OUT		0x19
 #define ADM9240_REG_CHASSIS_CLEAR	0x46
 #define ADM9240_REG_VID_FAN_DIV		0x47
@@ -162,8 +162,7 @@ struct adm9240_data {
 	u8 fan_min[2];		/* rw	fan1_min */
 	u8 fan_div[2];		/* rw	fan1_div, read-only accessor */
 	s16 temp;		/* ro	temp1_input, 9-bit sign-extended */
-	s8 temp_high;		/* rw	temp1_max */
-	s8 temp_hyst;		/* rw	temp1_max_hyst */
+	s8 temp_max[2];		/* rw	0 -> temp_max, 1 -> temp_max_hyst */
 	u16 alarms;		/* ro	alarms */
 	u8 aout;		/* rw	aout_output */
 	u8 vid;			/* ro	vid */
@@ -173,157 +172,143 @@ struct adm9240_data {
 /*** sysfs accessors ***/
 
 /* temperature */
-#define show_temp(value, scale)					\
-static ssize_t show_##value(struct device *dev,			\
-			    struct device_attribute *attr,	\
-			    char *buf)				\
-{								\
-	struct adm9240_data *data = adm9240_update_device(dev);	\
-	return sprintf(buf, "%d\n", data->value * scale);	\
-}
-show_temp(temp_high, 1000);
-show_temp(temp_hyst, 1000);
-show_temp(temp, 500); /* 0.5'C per bit */
-
-#define set_temp(value, reg)					\
-static ssize_t set_##value(struct device *dev, 			\
-			   struct device_attribute *attr,	\
-			   const char *buf, size_t count)	\
-{								\
-	struct i2c_client *client = to_i2c_client(dev);		\
-	struct adm9240_data *data = adm9240_update_device(dev);	\
-	long temp = simple_strtoul(buf, NULL, 10);		\
-								\
-	down(&data->update_lock);				\
-	data->value = TEMP_TO_REG(temp);			\
-	i2c_smbus_write_byte_data(client, reg, data->value);	\
-	up(&data->update_lock);					\
-	return count;						\
-}
-
-set_temp(temp_high, ADM9240_REG_TEMP_HIGH);
-set_temp(temp_hyst, ADM9240_REG_TEMP_HYST);
-
-static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
-		show_temp_high, set_temp_high);
-static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
-		show_temp_hyst, set_temp_hyst);
+static ssize_t show_temp(struct device *dev, struct device_attribute *dummy,
+		char *buf)
+{
+	struct adm9240_data *data = adm9240_update_device(dev);
+	return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */
+}
+
+static ssize_t show_max(struct device *dev, struct device_attribute *devattr,
+		char *buf)
+{
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+	struct adm9240_data *data = adm9240_update_device(dev);
+	return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000);
+}
+
+static ssize_t set_max(struct device *dev, struct device_attribute *devattr,
+		const char *buf, size_t count)
+{
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+	struct i2c_client *client = to_i2c_client(dev);
+	struct adm9240_data *data = i2c_get_clientdata(client);
+	long val = simple_strtol(buf, NULL, 10);
+
+	down(&data->update_lock);
+	data->temp_max[attr->index] = TEMP_TO_REG(val);
+	i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index),
+			data->temp_max[attr->index]);
+	up(&data->update_lock);
+	return count;
+}
+
 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
+		show_max, set_max, 0);
+static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
+		show_max, set_max, 1);
 
 /* voltage */
-static ssize_t show_in(struct device *dev, char *buf, int nr)
+static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
+		char *buf)
 {
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct adm9240_data *data = adm9240_update_device(dev);
-	return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr));
+	return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
+				attr->index));
 }
 
-static ssize_t show_in_min(struct device *dev, char *buf, int nr)
+static ssize_t show_in_min(struct device *dev, struct device_attribute *devattr,
+		char *buf)
 {
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct adm9240_data *data = adm9240_update_device(dev);
-	return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr));
+	return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
+				attr->index));
 }
 
-static ssize_t show_in_max(struct device *dev, char *buf, int nr)
+static ssize_t show_in_max(struct device *dev, struct device_attribute *devattr,
+		char *buf)
 {
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct adm9240_data *data = adm9240_update_device(dev);
-	return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr));
+	return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
+				attr->index));
 }
 
-static ssize_t set_in_min(struct device *dev, const char *buf,
-		size_t count, int nr)
+static ssize_t set_in_min(struct device *dev, struct device_attribute *devattr,
+		const char *buf, size_t count)
 {
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct i2c_client *client = to_i2c_client(dev);
 	struct adm9240_data *data = i2c_get_clientdata(client);
 	unsigned long val = simple_strtoul(buf, NULL, 10);
 
 	down(&data->update_lock);
-	data->in_min[nr] = IN_TO_REG(val, nr);
-	i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(nr),
-			data->in_min[nr]);
+	data->in_min[attr->index] = IN_TO_REG(val, attr->index);
+	i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index),
+			data->in_min[attr->index]);
 	up(&data->update_lock);
 	return count;
 }
 
-static ssize_t set_in_max(struct device *dev, const char *buf,
-		size_t count, int nr)
+static ssize_t set_in_max(struct device *dev, struct device_attribute *devattr,
+		const char *buf, size_t count)
 {
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct i2c_client *client = to_i2c_client(dev);
 	struct adm9240_data *data = i2c_get_clientdata(client);
 	unsigned long val = simple_strtoul(buf, NULL, 10);
 
 	down(&data->update_lock);
-	data->in_max[nr] = IN_TO_REG(val, nr);
-	i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(nr),
-			data->in_max[nr]);
+	data->in_max[attr->index] = IN_TO_REG(val, attr->index);
+	i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index),
+			data->in_max[attr->index]);
 	up(&data->update_lock);
 	return count;
 }
 
-#define show_in_offset(offset)						\
-static ssize_t show_in##offset(struct device *dev,			\
-			       struct device_attribute *attr,		\
-			       char *buf)				\
-{									\
-	return show_in(dev, buf, offset);				\
-}									\
-static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);	\
-static ssize_t show_in##offset##_min(struct device *dev,		\
-				     struct device_attribute *attr,	\
-				     char *buf)				\
-{									\
-	return show_in_min(dev, buf, offset);				\
-}									\
-static ssize_t show_in##offset##_max(struct device *dev,		\
-				     struct device_attribute *attr,	\
-				     char *buf)				\
-{									\
-	return show_in_max(dev, buf, offset);				\
-}									\
-static ssize_t								\
-set_in##offset##_min(struct device *dev,				\
-		     struct device_attribute *attr, const char *buf,	\
-		     size_t count)					\
-{									\
-	return set_in_min(dev, buf, count, offset);			\
-}									\
-static ssize_t								\
-set_in##offset##_max(struct device *dev,				\
-		     struct device_attribute *attr, const char *buf,	\
-		     size_t count)					\
-{									\
-	return set_in_max(dev, buf, count, offset);			\
-}									\
-static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,			\
-		show_in##offset##_min, set_in##offset##_min);		\
-static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,			\
-		show_in##offset##_max, set_in##offset##_max);
-
-show_in_offset(0);
-show_in_offset(1);
-show_in_offset(2);
-show_in_offset(3);
-show_in_offset(4);
-show_in_offset(5);
+#define vin(nr)							\
+static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, 		\
+		show_in, NULL, nr);				\
+static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR,	\
+		show_in_min, set_in_min, nr);			\
+static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR,	\
+		show_in_max, set_in_max, nr);
+
+vin(0);
+vin(1);
+vin(2);
+vin(3);
+vin(4);
+vin(5);
 
 /* fans */
-static ssize_t show_fan(struct device *dev, char *buf, int nr)
+static ssize_t show_fan(struct device *dev,
+		struct device_attribute *devattr, char *buf)
 {
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct adm9240_data *data = adm9240_update_device(dev);
-	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
-				1 << data->fan_div[nr]));
+	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
+				1 << data->fan_div[attr->index]));
 }
 
-static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
+static ssize_t show_fan_min(struct device *dev,
+		struct device_attribute *devattr, char *buf)
 {
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct adm9240_data *data = adm9240_update_device(dev);
-	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
-				1 << data->fan_div[nr]));
+	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
+				1 << data->fan_div[attr->index]));
 }
 
-static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
+static ssize_t show_fan_div(struct device *dev,
+		struct device_attribute *devattr, char *buf)
 {
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct adm9240_data *data = adm9240_update_device(dev);
-	return sprintf(buf, "%d\n", 1 << data->fan_div[nr]);
+	return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
 }
 
 /* write new fan div, callers must hold data->update_lock */
@@ -352,12 +337,15 @@ static void adm9240_write_fan_div(struct i2c_client *client, int nr,
  * - otherwise: select fan clock divider to suit fan speed low limit,
  *   measurement code may adjust registers to ensure fan speed reading
  */
-static ssize_t set_fan_min(struct device *dev, const char *buf,
-		size_t count, int nr)
+static ssize_t set_fan_min(struct device *dev,
+		struct device_attribute *devattr,
+		const char *buf, size_t count)
 {
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct i2c_client *client = to_i2c_client(dev);
 	struct adm9240_data *data = i2c_get_clientdata(client);
 	unsigned long val = simple_strtoul(buf, NULL, 10);
+	int nr = attr->index;
 	u8 new_div;
 
 	down(&data->update_lock);
@@ -404,40 +392,16 @@ static ssize_t set_fan_min(struct device *dev, const char *buf,
 	return count;
 }
 
-#define show_fan_offset(offset)						\
-static ssize_t show_fan_##offset (struct device *dev,			\
-				  struct device_attribute *attr,	\
-				  char *buf)				\
-{									\
-return show_fan(dev, buf, offset - 1);					\
-}									\
-static ssize_t show_fan_##offset##_div (struct device *dev,		\
-					struct device_attribute *attr,	\
-					char *buf)			\
-{									\
-return show_fan_div(dev, buf, offset - 1);				\
-}									\
-static ssize_t show_fan_##offset##_min (struct device *dev,		\
-					struct device_attribute *attr,	\
-					char *buf)			\
-{									\
-return show_fan_min(dev, buf, offset - 1);				\
-}									\
-static ssize_t set_fan_##offset##_min (struct device *dev, 		\
-				       struct device_attribute *attr,	\
-				       const char *buf, size_t count)	\
-{									\
-return set_fan_min(dev, buf, count, offset - 1);			\
-}									\
-static DEVICE_ATTR(fan##offset##_input, S_IRUGO, 			\
-		show_fan_##offset, NULL);				\
-static DEVICE_ATTR(fan##offset##_div, S_IRUGO, 				\
-		show_fan_##offset##_div, NULL);				\
-static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, 		\
-		show_fan_##offset##_min, set_fan_##offset##_min);
-
-show_fan_offset(1);
-show_fan_offset(2);
+#define fan(nr)							\
+static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO,		\
+		show_fan, NULL, nr - 1);			\
+static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO,		\
+		show_fan_div, NULL, nr - 1);			\
+static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR,	\
+		show_fan_min, set_fan_min, nr - 1);
+
+fan(1);
+fan(2);
 
 /* alarms */
 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
@@ -580,33 +544,59 @@ static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind)
 		goto exit_detach;
 	}
 
-	device_create_file(&new_client->dev, &dev_attr_in0_input);
-	device_create_file(&new_client->dev, &dev_attr_in0_min);
-	device_create_file(&new_client->dev, &dev_attr_in0_max);
-	device_create_file(&new_client->dev, &dev_attr_in1_input);
-	device_create_file(&new_client->dev, &dev_attr_in1_min);
-	device_create_file(&new_client->dev, &dev_attr_in1_max);
-	device_create_file(&new_client->dev, &dev_attr_in2_input);
-	device_create_file(&new_client->dev, &dev_attr_in2_min);
-	device_create_file(&new_client->dev, &dev_attr_in2_max);
-	device_create_file(&new_client->dev, &dev_attr_in3_input);
-	device_create_file(&new_client->dev, &dev_attr_in3_min);
-	device_create_file(&new_client->dev, &dev_attr_in3_max);
-	device_create_file(&new_client->dev, &dev_attr_in4_input);
-	device_create_file(&new_client->dev, &dev_attr_in4_min);
-	device_create_file(&new_client->dev, &dev_attr_in4_max);
-	device_create_file(&new_client->dev, &dev_attr_in5_input);
-	device_create_file(&new_client->dev, &dev_attr_in5_min);
-	device_create_file(&new_client->dev, &dev_attr_in5_max);
-	device_create_file(&new_client->dev, &dev_attr_temp1_max);
-	device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in0_input.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in0_min.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in0_max.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in1_input.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in1_min.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in1_max.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in2_input.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in2_min.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in2_max.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in3_input.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in3_min.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in3_max.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in4_input.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in4_min.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in4_max.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in5_input.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in5_min.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_in5_max.dev_attr);
 	device_create_file(&new_client->dev, &dev_attr_temp1_input);
-	device_create_file(&new_client->dev, &dev_attr_fan1_input);
-	device_create_file(&new_client->dev, &dev_attr_fan1_div);
-	device_create_file(&new_client->dev, &dev_attr_fan1_min);
-	device_create_file(&new_client->dev, &dev_attr_fan2_input);
-	device_create_file(&new_client->dev, &dev_attr_fan2_div);
-	device_create_file(&new_client->dev, &dev_attr_fan2_min);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_temp1_max.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_temp1_max_hyst.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_fan1_input.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_fan1_div.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_fan1_min.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_fan2_input.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_fan2_div.dev_attr);
+	device_create_file(&new_client->dev,
+			&sensor_dev_attr_fan2_min.dev_attr);
 	device_create_file(&new_client->dev, &dev_attr_alarms);
 	device_create_file(&new_client->dev, &dev_attr_aout_output);
 	device_create_file(&new_client->dev, &dev_attr_chassis_clear);
@@ -674,9 +664,9 @@ static void adm9240_init_client(struct i2c_client *client)
 		i2c_smbus_write_byte_data(client,
 				ADM9240_REG_FAN_MIN(1), 255);
 		i2c_smbus_write_byte_data(client,
-				ADM9240_REG_TEMP_HIGH, 127);
+				ADM9240_REG_TEMP_MAX(0), 127);
 		i2c_smbus_write_byte_data(client,
-				ADM9240_REG_TEMP_HYST, 127);
+				ADM9240_REG_TEMP_MAX(1), 127);
 
 		/* start measurement cycle */
 		i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1);
@@ -753,10 +743,10 @@ static struct adm9240_data *adm9240_update_device(struct device *dev)
 			data->fan_min[i] = i2c_smbus_read_byte_data(client,
 					ADM9240_REG_FAN_MIN(i));
 		}
-		data->temp_high = i2c_smbus_read_byte_data(client,
-				ADM9240_REG_TEMP_HIGH);
-		data->temp_hyst = i2c_smbus_read_byte_data(client,
-				ADM9240_REG_TEMP_HYST);
+		data->temp_max[0] = i2c_smbus_read_byte_data(client,
+				ADM9240_REG_TEMP_MAX(0));
+		data->temp_max[1] = i2c_smbus_read_byte_data(client,
+				ADM9240_REG_TEMP_MAX(1));
 
 		/* read fan divs and 5-bit VID */
 		i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);