#include <linux/err.h>
#include <linux/sysfs.h>
#include <linux/hwmon.h>
+#include <linux/mutex.h>
#include <linux/spi/spi.h>
-#include <asm/semaphore.h>
+
#define DRVNAME "lm70"
struct lm70 {
- struct class_device *cdev;
- struct semaphore sem;
+ struct device *hwmon_dev;
+ struct mutex lock;
};
/* sysfs hook function */
s16 raw=0;
struct lm70 *p_lm70 = dev_get_drvdata(&spi->dev);
- if (down_interruptible(&p_lm70->sem))
+ if (mutex_lock_interruptible(&p_lm70->lock))
return -ERESTARTSYS;
/*
* So it's equivalent to multiplying by 0.25 * 1000 = 250.
*/
val = ((int)raw/32) * 250;
- status = sprintf(buf, "%+d\n", val); /* millidegrees Celsius */
+ status = sprintf(buf, "%d\n", val); /* millidegrees Celsius */
out:
- up(&p_lm70->sem);
+ mutex_unlock(&p_lm70->lock);
return status;
}
static DEVICE_ATTR(temp1_input, S_IRUGO, lm70_sense_temp, NULL);
+static ssize_t lm70_show_name(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ return sprintf(buf, "lm70\n");
+}
+
+static DEVICE_ATTR(name, S_IRUGO, lm70_show_name, NULL);
+
/*----------------------------------------------------------------------*/
static int __devinit lm70_probe(struct spi_device *spi)
if (!p_lm70)
return -ENOMEM;
- init_MUTEX(&p_lm70->sem);
+ mutex_init(&p_lm70->lock);
/* sysfs hook */
- p_lm70->cdev = hwmon_device_register(&spi->dev);
- if (IS_ERR(p_lm70->cdev)) {
+ p_lm70->hwmon_dev = hwmon_device_register(&spi->dev);
+ if (IS_ERR(p_lm70->hwmon_dev)) {
dev_dbg(&spi->dev, "hwmon_device_register failed.\n");
- status = PTR_ERR(p_lm70->cdev);
+ status = PTR_ERR(p_lm70->hwmon_dev);
goto out_dev_reg_failed;
}
dev_set_drvdata(&spi->dev, p_lm70);
- if ((status = device_create_file(&spi->dev, &dev_attr_temp1_input))) {
+ if ((status = device_create_file(&spi->dev, &dev_attr_temp1_input))
+ || (status = device_create_file(&spi->dev, &dev_attr_name))) {
dev_dbg(&spi->dev, "device_create_file failure.\n");
goto out_dev_create_file_failed;
}
return 0;
out_dev_create_file_failed:
- hwmon_device_unregister(p_lm70->cdev);
+ device_remove_file(&spi->dev, &dev_attr_temp1_input);
+ hwmon_device_unregister(p_lm70->hwmon_dev);
out_dev_reg_failed:
dev_set_drvdata(&spi->dev, NULL);
kfree(p_lm70);
struct lm70 *p_lm70 = dev_get_drvdata(&spi->dev);
device_remove_file(&spi->dev, &dev_attr_temp1_input);
- hwmon_device_unregister(p_lm70->cdev);
+ device_remove_file(&spi->dev, &dev_attr_name);
+ hwmon_device_unregister(p_lm70->hwmon_dev);
dev_set_drvdata(&spi->dev, NULL);
kfree(p_lm70);