sound/aoa/soundbus/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/kernel.h>
   3 #include <linux/stat.h>
   4 /* FIX UP */
   5 #include "soundbus.h"
   6
   7 #define soundbus_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 soundbus_dev *mdev = to_soundbus_device (dev);           \
  13         return sprintf (buf, format_string, mdev->ofdev.dev.of_node->field); \
  14 }
  15
  16 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
  17                              char *buf)
  18 {
  19         struct soundbus_dev *sdev = to_soundbus_device(dev);
  20         struct platform_device *of = &sdev->ofdev;
  21         int length;
  22
  23         if (*sdev->modalias) {
  24                 strlcpy(buf, sdev->modalias, sizeof(sdev->modalias) + 1);
  25                 strcat(buf, "\n");
  26                 length = strlen(buf);
  27         } else {
  28                 length = sprintf(buf, "of:N%sT%s\n",
  29                                  of->dev.of_node->name, of->dev.of_node->type);
  30         }
  31
  32         return length;
  33 }
  34 static DEVICE_ATTR_RO(modalias);
  35
  36 soundbus_config_of_attr (name, "%s\n");
  37 static DEVICE_ATTR_RO(name);
  38 soundbus_config_of_attr (type, "%s\n");
  39 static DEVICE_ATTR_RO(type);
  40
  41 struct attribute *soundbus_dev_attrs[] = {
  42         &dev_attr_name.attr,
  43         &dev_attr_type.attr,
  44         &dev_attr_modalias.attr,
  45         NULL,
  46 };