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hwmon/ds1621: Use dynamic sysfs callbacks
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This lets us get rid of macro-generated functions and shrinks the
driver size by about 8%.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Aurelien Jarno <aurelien@aurel32.net>
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Jean Delvare authored and Mark M. Hoffman committed Jul 19, 2007
1 parent 75819f0 commit 46a2e71
Showing 1 changed file with 48 additions and 54 deletions.
102 changes: 48 additions & 54 deletions drivers/hwmon/ds1621.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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>
Expand All @@ -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 */
Expand All @@ -75,7 +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 */
};

Expand Down Expand Up @@ -133,50 +136,47 @@ 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 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 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,
&dev_attr_alarms.attr,
NULL
};
Expand All @@ -200,7 +200,7 @@ static int ds1621_detect(struct i2c_adapter *adapter, int address,
int conf, temp;
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
Expand Down Expand Up @@ -230,15 +230,11 @@ static int ds1621_detect(struct i2c_adapter *adapter, int address,
if (conf & DS1621_REG_CONFIG_NVB)
goto exit_free;
/* The 7 lowest bits of a temperature should always be 0. */
temp = ds1621_read_value(client, DS1621_REG_TEMP);
if (temp & 0x007f)
goto exit_free;
temp = ds1621_read_value(client, DS1621_REG_TEMP_MIN);
if (temp & 0x007f)
goto exit_free;
temp = ds1621_read_value(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;
}
}

/* Fill in remaining client fields and put it into the global list */
Expand Down Expand Up @@ -301,23 +297,21 @@ 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,
Expand Down

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