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Commit 9ca8e40c authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
Browse files

hwmon/lm75: Use dynamic sysfs callbacks 



This lets us get rid of macro-generated functions and shrinks the
driver size by about 8%.

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 247dde4c

drivers/hwmon/lm75.c

+44 −38
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#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 "lm75.h"
@@ -39,10 +40,12 @@ I2C_CLIENT_INSMOD_1(lm75); 
/* Many LM75 constants specified below */



/* The LM75 registers */

#define LM75_REG_TEMP		0x00

#define LM75_REG_CONF		0x01

#define LM75_REG_TEMP_HYST	0x02

#define LM75_REG_TEMP_OS	0x03

static const u8 LM75_REG_TEMP[3] = {

	0x00,		/* input */

	0x03,		/* max */

	0x02,		/* hyst */

};



/* Each client has this additional data */

struct lm75_data {
@@ -51,9 +54,10 @@ struct lm75_data { 
	struct mutex		update_lock;

	char			valid;		/* !=0 if following fields are valid */

	unsigned long		last_updated;	/* In jiffies */

	u16			temp_input;	/* Register values */

	u16			temp_max;

	u16			temp_hyst;

	u16			temp[3];	/* Register values,

						   0 = input

						   1 = max

						   2 = hyst */

};



static int lm75_attach_adapter(struct i2c_adapter *adapter);
@@ -75,35 +79,36 @@ static struct i2c_driver lm75_driver = { 
	.detach_client	= lm75_detach_client,

};



#define show(value)	\

static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf)		\

{									\

	struct lm75_data *data = lm75_update_device(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 lm75_data *data = lm75_update_device(dev);

	return sprintf(buf, "%d\n",

		       LM75_TEMP_FROM_REG(data->temp[attr->index]));

}

show(temp_max);

show(temp_hyst);

show(temp_input);



#define set(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 lm75_data *data = i2c_get_clientdata(client);	\

	int temp = simple_strtoul(buf, NULL, 10);		\

								\

	mutex_lock(&data->update_lock);				\

	data->value = LM75_TEMP_TO_REG(temp);			\

	lm75_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 lm75_data *data = i2c_get_clientdata(client);

	int nr = attr->index;

	unsigned long temp = simple_strtoul(buf, NULL, 10);



	mutex_lock(&data->update_lock);

	data->temp[nr] = LM75_TEMP_TO_REG(temp);

	lm75_write_value(client, LM75_REG_TEMP[nr], data->temp[nr]);

	mutex_unlock(&data->update_lock);

	return count;

}

set(temp_max, LM75_REG_TEMP_OS);

set(temp_hyst, LM75_REG_TEMP_HYST);



static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, set_temp_max);

static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hyst, set_temp_hyst);

static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL);

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 int lm75_attach_adapter(struct i2c_adapter *adapter)

{
@@ -113,9 +118,9 @@ static int lm75_attach_adapter(struct i2c_adapter *adapter) 
}



static struct attribute *lm75_attributes[] = {

	&dev_attr_temp1_input.attr,

	&dev_attr_temp1_max.attr,

	&dev_attr_temp1_max_hyst.attr,

	&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,



	NULL

};
@@ -283,11 +288,12 @@ static struct lm75_data *lm75_update_device(struct device *dev) 


	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)

	    || !data->valid) {

		int i;

		dev_dbg(&client->dev, "Starting lm75 update\n");



		data->temp_input = lm75_read_value(client, LM75_REG_TEMP);

		data->temp_max = lm75_read_value(client, LM75_REG_TEMP_OS);

		data->temp_hyst = lm75_read_value(client, LM75_REG_TEMP_HYST);

		for (i = 0; i < ARRAY_SIZE(data->temp); i++)

			data->temp[i] = lm75_read_value(client,

							LM75_REG_TEMP[i]);

		data->last_updated = jiffies;

		data->valid = 1;

	}