sysfs.c
1.06 KB
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#include <linux/kernel.h>
#include <linux/stat.h>
/* FIX UP */
#include "soundbus.h"
#define soundbus_config_of_attr(field, format_string) \
static ssize_t \
field##_show (struct device *dev, struct device_attribute *attr, \
char *buf) \
{ \
struct soundbus_dev *mdev = to_soundbus_device (dev); \
return sprintf (buf, format_string, mdev->ofdev.dev.of_node->field); \
}
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct soundbus_dev *sdev = to_soundbus_device(dev);
struct platform_device *of = &sdev->ofdev;
int length;
if (*sdev->modalias) {
strlcpy(buf, sdev->modalias, sizeof(sdev->modalias) + 1);
strcat(buf, "\n");
length = strlen(buf);
} else {
length = sprintf(buf, "of:N%sT%s\n",
of->dev.of_node->name, of->dev.of_node->type);
}
return length;
}
soundbus_config_of_attr (name, "%s\n");
soundbus_config_of_attr (type, "%s\n");
struct device_attribute soundbus_dev_attrs[] = {
__ATTR_RO(name),
__ATTR_RO(type),
__ATTR_RO(modalias),
__ATTR_NULL
};