diff options
Diffstat (limited to 'drivers/hwmon/lm75.c')
| -rw-r--r-- | drivers/hwmon/lm75.c | 82 |
1 files changed, 44 insertions, 38 deletions
diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c index 7c65b8bb6d72..a40166ffad12 100644 --- a/drivers/hwmon/lm75.c +++ b/drivers/hwmon/lm75.c @@ -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; } |