1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/kernel.h>
3 #include <linux/of.h>
4 #include <linux/of_device.h>
5 #include <linux/stat.h>
6 #include <asm/macio.h>
7
8 static ssize_t
compatible_show(struct device * dev,struct device_attribute * attr,char * buf)9 compatible_show (struct device *dev, struct device_attribute *attr, char *buf)
10 {
11 struct platform_device *of;
12 const char *compat;
13 int cplen;
14 int length = 0;
15
16 of = &to_macio_device (dev)->ofdev;
17 compat = of_get_property(of->dev.of_node, "compatible", &cplen);
18 if (!compat) {
19 *buf = '\0';
20 return 0;
21 }
22 while (cplen > 0) {
23 int l;
24 length += sprintf (buf, "%s\n", compat);
25 buf += length;
26 l = strlen (compat) + 1;
27 compat += l;
28 cplen -= l;
29 }
30
31 return length;
32 }
33 static DEVICE_ATTR_RO(compatible);
34
modalias_show(struct device * dev,struct device_attribute * attr,char * buf)35 static ssize_t modalias_show (struct device *dev, struct device_attribute *attr,
36 char *buf)
37 {
38 return of_device_modalias(dev, buf, PAGE_SIZE);
39 }
40
devspec_show(struct device * dev,struct device_attribute * attr,char * buf)41 static ssize_t devspec_show(struct device *dev,
42 struct device_attribute *attr, char *buf)
43 {
44 struct platform_device *ofdev;
45
46 ofdev = to_platform_device(dev);
47 return sprintf(buf, "%pOF\n", ofdev->dev.of_node);
48 }
49 static DEVICE_ATTR_RO(modalias);
50 static DEVICE_ATTR_RO(devspec);
51
name_show(struct device * dev,struct device_attribute * attr,char * buf)52 static ssize_t name_show(struct device *dev,
53 struct device_attribute *attr, char *buf)
54 {
55 return sprintf(buf, "%pOFn\n", dev->of_node);
56 }
57 static DEVICE_ATTR_RO(name);
58
type_show(struct device * dev,struct device_attribute * attr,char * buf)59 static ssize_t type_show(struct device *dev,
60 struct device_attribute *attr, char *buf)
61 {
62 return sprintf(buf, "%s\n", of_node_get_device_type(dev->of_node));
63 }
64 static DEVICE_ATTR_RO(type);
65
66 static struct attribute *macio_dev_attrs[] = {
67 &dev_attr_name.attr,
68 &dev_attr_type.attr,
69 &dev_attr_compatible.attr,
70 &dev_attr_modalias.attr,
71 &dev_attr_devspec.attr,
72 NULL,
73 };
74
75 static const struct attribute_group macio_dev_group = {
76 .attrs = macio_dev_attrs,
77 };
78
79 const struct attribute_group *macio_dev_groups[] = {
80 &macio_dev_group,
81 NULL,
82 };
83