drivers/macintosh/macio_sysfs.c

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