sound/aoa/soundbus/sysfs.c

   1 #include <linux/kernel.h>
   2 #include <linux/stat.h>
   3 /* FIX UP */
   4 #include "soundbus.h"
   5
   6 #define soundbus_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 soundbus_dev *mdev = to_soundbus_device (dev);           \
  12         return sprintf (buf, format_string, mdev->ofdev.dev.of_node->field); \
  13 }
  14
  15 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
  16                              char *buf)
  17 {
  18         struct soundbus_dev *sdev = to_soundbus_device(dev);
  19         struct platform_device *of = &sdev->ofdev;
  20         int length;
  21
  22         if (*sdev->modalias) {
  23                 strlcpy(buf, sdev->modalias, sizeof(sdev->modalias) + 1);
  24                 strcat(buf, "\n");
  25                 length = strlen(buf);
  26         } else {
  27                 length = sprintf(buf, "of:N%sT%s\n",
  28                                  of->dev.of_node->name, of->dev.of_node->type);
  29         }
  30
  31         return length;
  32 }
  33 static DEVICE_ATTR_RO(modalias);
  34
  35 soundbus_config_of_attr (name, "%s\n");
  36 static DEVICE_ATTR_RO(name);
  37 soundbus_config_of_attr (type, "%s\n");
  38 static DEVICE_ATTR_RO(type);
  39
  40 struct attribute *soundbus_dev_attrs[] = {
  41         &dev_attr_name.attr,
  42         &dev_attr_type.attr,
  43         &dev_attr_modalias.attr,
  44         NULL,
  45 };