sysfs.c

 1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/kernel.h>
 3#include <linux/of.h>
 4#include <linux/stat.h>
 5/* FIX UP */
 6#include "soundbus.h"
 7
 8static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 9			     char *buf)
10{
11	struct soundbus_dev *sdev = to_soundbus_device(dev);
12	struct platform_device *of = &sdev->ofdev;
13
14	if (*sdev->modalias)
15		return sysfs_emit(buf, "%s\n", sdev->modalias);
16	else
17		return sysfs_emit(buf, "of:N%pOFn%c%s\n",
18				  of->dev.of_node, 'T',
19				  of_node_get_device_type(of->dev.of_node));
20}
21static DEVICE_ATTR_RO(modalias);
22
23static ssize_t name_show(struct device *dev,
24			 struct device_attribute *attr, char *buf)
25{
26	struct soundbus_dev *sdev = to_soundbus_device(dev);
27	struct platform_device *of = &sdev->ofdev;
28
29	return sysfs_emit(buf, "%pOFn\n", of->dev.of_node);
30}
31static DEVICE_ATTR_RO(name);
32
33static ssize_t type_show(struct device *dev,
34			 struct device_attribute *attr, char *buf)
35{
36	struct soundbus_dev *sdev = to_soundbus_device(dev);
37	struct platform_device *of = &sdev->ofdev;
38
39	return sysfs_emit(buf, "%s\n", of_node_get_device_type(of->dev.of_node));
40}
41static DEVICE_ATTR_RO(type);
42
43struct attribute *soundbus_dev_attrs[] = {
44	&dev_attr_name.attr,
45	&dev_attr_type.attr,
46	&dev_attr_modalias.attr,
47	NULL,
48};