// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/stat.h>
#include <asm/macio.h>

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 DEVICE_ATTR_RO(compatible);

static ssize_t modalias_show (struct device *dev, struct device_attribute *attr,
                              char *buf)
{
        return of_device_modalias(dev, buf, PAGE_SIZE);
}

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, "%pOF\n", ofdev->dev.of_node);
}
static DEVICE_ATTR_RO(modalias);
static DEVICE_ATTR_RO(devspec);

static ssize_t name_show(struct device *dev,
                         struct device_attribute *attr, char *buf)
{
        return sprintf(buf, "%pOFn\n", dev->of_node);
}
static DEVICE_ATTR_RO(name);

static ssize_t type_show(struct device *dev,
                         struct device_attribute *attr, char *buf)
{
        return sprintf(buf, "%s\n", of_node_get_device_type(dev->of_node));
}
static DEVICE_ATTR_RO(type);

static struct attribute *macio_dev_attrs[] = {
        &dev_attr_name.attr,
        &dev_attr_type.attr,
        &dev_attr_compatible.attr,
        &dev_attr_modalias.attr,
        &dev_attr_devspec.attr,
        NULL,
};

static const struct attribute_group macio_dev_group = {
        .attrs = macio_dev_attrs,
};

const struct attribute_group *macio_dev_groups[] = {
        &macio_dev_group,
        NULL,
};