drivers/macintosh/macio_sysfs.c

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