macio_sysfs.c

Go to the documentation of this file.

#include <linux/kernel.h>
#include <linux/stat.h>
#include <asm/macio.h>


#define macio_config_of_attr(field, format_string)          \
static ssize_t                              \
field##_show (struct device *dev, struct device_attribute *attr,    \
              char *buf)                        \
{                                   \
    struct macio_dev *mdev = to_macio_device (dev);         \
    return sprintf (buf, format_string, mdev->ofdev.dev.of_node->field); \
}

static ssize_t
compatible_show (struct device *dev, struct device_attribute *attr, char *buf)
{
    struct platform_device *of;
    const char *compat;
    int cplen;
    int length = 0;

    of = &to_macio_device (dev)->ofdev;
    compat = of_get_property(of->dev.of_node, "compatible", &cplen);
    if (!compat) {
        *buf = '\0';
        return 0;
    }
    while (cplen > 0) {
        int l;
        length += sprintf (buf, "%s\n", compat);
        buf += length;
        l = strlen (compat) + 1;
        compat += l;
        cplen -= l;
    }

    return length;
}

static ssize_t modalias_show (struct device *dev, struct device_attribute *attr,
                  char *buf)
{
    int len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2);

    buf[len] = '\n';
    buf[len+1] = 0;

    return len+1;
}

static ssize_t devspec_show(struct device *dev,
                struct device_attribute *attr, char *buf)
{
    struct platform_device *ofdev;

    ofdev = to_platform_device(dev);
    return sprintf(buf, "%s\n", ofdev->dev.of_node->full_name);
}

macio_config_of_attr (name, "%s\n");
macio_config_of_attr (type, "%s\n");

struct device_attribute macio_dev_attrs[] = {
    __ATTR_RO(name),
    __ATTR_RO(type),
    __ATTR_RO(compatible),
    __ATTR_RO(modalias),
    __ATTR_RO(devspec),
    __ATTR_NULL
};