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Commit 1a86c051 authored by Jean Delvare's avatar Jean Delvare Committed by Greg Kroah-Hartman
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[PATCH] I2C: lm83 uses new sysfs callbacks 



I updated the lm83 hardware monitoring driver to take benefit of Yani
Ioannou's new sysfs callback capabilities.

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 30d7394b

drivers/i2c/chips/lm83.c

+77 −80
Original line number Diff line number Diff line 
/*

 * lm83.c - Part of lm_sensors, Linux kernel modules for hardware

 *          monitoring

 * Copyright (C) 2003  Jean Delvare <khali@linux-fr.org>

 * Copyright (C) 2003-2005  Jean Delvare <khali@linux-fr.org>

 *

 * Heavily inspired from the lm78, lm75 and adm1021 drivers. The LM83 is

 * a sensor chip made by National Semiconductor. It reports up to four
@@ -33,6 +33,7 @@ 
#include <linux/jiffies.h>

#include <linux/i2c.h>

#include <linux/i2c-sensor.h>

#include <linux/i2c-sysfs.h>



/*

 * Addresses to scan
@@ -93,21 +94,20 @@ static const u8 LM83_REG_R_TEMP[] = { 
	LM83_REG_R_LOCAL_TEMP,

	LM83_REG_R_REMOTE1_TEMP,

	LM83_REG_R_REMOTE2_TEMP,

	LM83_REG_R_REMOTE3_TEMP

};



static const u8 LM83_REG_R_HIGH[] = {

	LM83_REG_R_REMOTE3_TEMP,

	LM83_REG_R_LOCAL_HIGH,

	LM83_REG_R_REMOTE1_HIGH,

	LM83_REG_R_REMOTE2_HIGH,

	LM83_REG_R_REMOTE3_HIGH

	LM83_REG_R_REMOTE3_HIGH,

	LM83_REG_R_TCRIT,

};



static const u8 LM83_REG_W_HIGH[] = {

	LM83_REG_W_LOCAL_HIGH,

	LM83_REG_W_REMOTE1_HIGH,

	LM83_REG_W_REMOTE2_HIGH,

	LM83_REG_W_REMOTE3_HIGH

	LM83_REG_W_REMOTE3_HIGH,

	LM83_REG_W_TCRIT,

};



/*
@@ -143,9 +143,9 @@ struct lm83_data { 
	unsigned long last_updated; /* in jiffies */



	/* registers values */

	s8 temp_input[4];

	s8 temp_high[4];

	s8 temp_crit;

	s8 temp[9];	/* 0..3: input 1-4,

			   4..7: high limit 1-4,

			   8   : critical limit */

	u16 alarms; /* bitvector, combined */

};
@@ -153,65 +153,55 @@ struct lm83_data { 
 * Sysfs stuff

 */



#define show_temp(suffix, value) \

static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \

{ \

	struct lm83_data *data = lm83_update_device(dev); \

	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->value)); \

static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,

			 char *buf)

{

	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

	struct lm83_data *data = lm83_update_device(dev);

	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));

}

show_temp(input1, temp_input[0]);

show_temp(input2, temp_input[1]);

show_temp(input3, temp_input[2]);

show_temp(input4, temp_input[3]);

show_temp(high1, temp_high[0]);

show_temp(high2, temp_high[1]);

show_temp(high3, temp_high[2]);

show_temp(high4, temp_high[3]);

show_temp(crit, temp_crit);



#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 lm83_data *data = i2c_get_clientdata(client); \

	long val = simple_strtol(buf, NULL, 10); \

 \

	down(&data->update_lock); \

	data->value = TEMP_TO_REG(val); \

	i2c_smbus_write_byte_data(client, reg, data->value); \

	up(&data->update_lock); \

	return count; \



static ssize_t set_temp(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 lm83_data *data = i2c_get_clientdata(client);

	long val = simple_strtol(buf, NULL, 10);

	int nr = attr->index;



	down(&data->update_lock);

	data->temp[nr] = TEMP_TO_REG(val);

	i2c_smbus_write_byte_data(client, LM83_REG_W_HIGH[nr - 4],

				  data->temp[nr]);

	up(&data->update_lock);

	return count;

}

set_temp(high1, temp_high[0], LM83_REG_W_LOCAL_HIGH);

set_temp(high2, temp_high[1], LM83_REG_W_REMOTE1_HIGH);

set_temp(high3, temp_high[2], LM83_REG_W_REMOTE2_HIGH);

set_temp(high4, temp_high[3], LM83_REG_W_REMOTE3_HIGH);

set_temp(crit, temp_crit, LM83_REG_W_TCRIT);



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 *dummy,

			   char *buf)

{

	struct lm83_data *data = lm83_update_device(dev);

	return sprintf(buf, "%d\n", data->alarms);

}



static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);

static DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input2, NULL);

static DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input3, NULL);

static DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input4, NULL);

static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_high1,

    set_temp_high1);

static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_high2,

    set_temp_high2);

static DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_high3,

    set_temp_high3);

static DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_high4,

    set_temp_high4);

static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL);

static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL);

static DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp_crit,

    set_temp_crit);

static DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL);

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);

static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);

static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);

static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);

static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp,

	set_temp, 4);

static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp,

	set_temp, 5);

static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp,

	set_temp, 6);

static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp,

	set_temp, 7);

static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp, NULL, 8);

static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp, NULL, 8);

static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp,

	set_temp, 8);

static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp, NULL, 8);

static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);



/*
@@ -322,18 +312,30 @@ static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) 
	 */



	/* Register sysfs hooks */

	device_create_file(&new_client->dev, &dev_attr_temp1_input);

	device_create_file(&new_client->dev, &dev_attr_temp2_input);

	device_create_file(&new_client->dev, &dev_attr_temp3_input);

	device_create_file(&new_client->dev, &dev_attr_temp4_input);

	device_create_file(&new_client->dev, &dev_attr_temp1_max);

	device_create_file(&new_client->dev, &dev_attr_temp2_max);

	device_create_file(&new_client->dev, &dev_attr_temp3_max);

	device_create_file(&new_client->dev, &dev_attr_temp4_max);

	device_create_file(&new_client->dev, &dev_attr_temp1_crit);

	device_create_file(&new_client->dev, &dev_attr_temp2_crit);

	device_create_file(&new_client->dev, &dev_attr_temp3_crit);

	device_create_file(&new_client->dev, &dev_attr_temp4_crit);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp1_input.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp2_input.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp3_input.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp4_input.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp1_max.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp2_max.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp3_max.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp4_max.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp1_crit.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp2_crit.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp3_crit.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp4_crit.dev_attr);

	device_create_file(&new_client->dev, &dev_attr_alarms);



	return 0;
@@ -369,16 +371,11 @@ static struct lm83_data *lm83_update_device(struct device *dev) 
		int nr;



		dev_dbg(&client->dev, "Updating lm83 data.\n");

		for (nr = 0; nr < 4 ; nr++) {

			data->temp_input[nr] =

		for (nr = 0; nr < 9; nr++) {

			data->temp[nr] =

			    i2c_smbus_read_byte_data(client,

			    LM83_REG_R_TEMP[nr]);

			data->temp_high[nr] =

			    i2c_smbus_read_byte_data(client,

			    LM83_REG_R_HIGH[nr]);

		}

		data->temp_crit =

		    i2c_smbus_read_byte_data(client, LM83_REG_R_TCRIT);

		data->alarms =

		    i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS1)

		    + (i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS2)