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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/usb/usb-host-interface-device_struct_usb_interface.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">Device (struct usb_interface)</h1><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><div class="- topic/p p" data-ofbid="d292440e22__20250121171759">如上一节描述， <code class="+ topic/ph pr-d/codeph ph codeph">USB Interface</code> Device 对应的数据结构为 <code class="+ topic/ph pr-d/codeph ph codeph">struct
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usb_interface</code> ，会在 <code class="+ topic/ph pr-d/codeph ph codeph">USB Device</code> Driver 驱动 probe() 时
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被创建：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="usb_host_interface_device_struct_usb_interface__pre_sms_14z_21c" data-ofbid="usb_host_interface_device_struct_usb_interface__pre_sms_14z_21c">usb_probe_device() → usb_generic_driver_probe() → usb_set_configuration():
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<strong class="hl-keyword">int</strong> usb_set_configuration(<strong class="hl-keyword">struct</strong> usb_device *dev, <strong class="hl-keyword">int</strong> configuration)
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{
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<em class="hl-comment">/* (1) 创建和初始化 `struct usb_interface` */</em>
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<strong class="hl-keyword">for</strong> (i = <span class="hl-number">0</span>; i < nintf; ++i) {
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<em class="hl-comment">/* (1.1) dev 总线初始化为 usb_bus_type */</em>
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intf->dev.bus = &usb_bus_type;
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<em class="hl-comment">/* (1.2) dev 类型初始化为 usb_if_device_type，标明自己是一个 usb interface */</em>
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intf->dev.type = &usb_if_device_type;
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intf->dev.groups = usb_interface_groups;
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}
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<em class="hl-comment">/* (2) 注册 `struct usb_interface` */</em>
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<strong class="hl-keyword">for</strong> (i = <span class="hl-number">0</span>; i < nintf; ++i) {
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ret = device_add(&intf->dev);
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}
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}
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</pre></div></div></article></main></div>
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