drivers/macintosh/macio_sysfs.c

   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
   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
  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
  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
  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
  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 };