sound/aoa/soundbus/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/kernel.h>
   3 #include <linux/of.h>
   4 #include <linux/stat.h>
   5 /* FIX UP */
   6 #include "soundbus.h"
   7
   8 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
   9                              char *buf)
  10 {
  11         struct soundbus_dev *sdev = to_soundbus_device(dev);
  12         struct platform_device *of = &sdev->ofdev;
  13         int length;
  14
  15         if (*sdev->modalias) {
  16                 strlcpy(buf, sdev->modalias, sizeof(sdev->modalias) + 1);
  17                 strcat(buf, "\n");
  18                 length = strlen(buf);
  19         } else {
  20                 length = sprintf(buf, "of:N%pOFn%c%s\n",
  21                                  of->dev.of_node, 'T',
  22                                  of_node_get_device_type(of->dev.of_node));
  23         }
  24
  25         return length;
  26 }
  27 static DEVICE_ATTR_RO(modalias);
  28
  29 static ssize_t name_show(struct device *dev,
  30                          struct device_attribute *attr, char *buf)
  31 {
  32         struct soundbus_dev *sdev = to_soundbus_device(dev);
  33         struct platform_device *of = &sdev->ofdev;
  34
  35         return sprintf(buf, "%pOFn\n", of->dev.of_node);
  36 }
  37 static DEVICE_ATTR_RO(name);
  38
  39 static ssize_t type_show(struct device *dev,
  40                          struct device_attribute *attr, char *buf)
  41 {
  42         struct soundbus_dev *sdev = to_soundbus_device(dev);
  43         struct platform_device *of = &sdev->ofdev;
  44
  45         return sprintf(buf, "%s\n", of_node_get_device_type(of->dev.of_node));
  46 }
  47 static DEVICE_ATTR_RO(type);
  48
  49 struct attribute *soundbus_dev_attrs[] = {
  50         &dev_attr_name.attr,
  51         &dev_attr_type.attr,
  52         &dev_attr_modalias.attr,
  53         NULL,
  54 };