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Model pemacu peranti Linux
- WBOYasal
- 2024-07-22 18:54:35587semak imbas
Daftar Kandungan
Satu pembolehubah persekitaran Linux, model pemacu peranti 1. Asal usul model pemacu peranti Linux
Semak dahulu proses biasa kompilasi pemacu peranti
【1】Laksanakan fungsi kemasukan module_init() dan fungsi pemunggahan modul module_exit();
【2】Mohon nombor peranti, daftar_chrdev();----->
【3】Gunakan mekanisme udev/mdev untuk mencipta nod fail peranti class_create(), device_create();------>(berkaitan dengan kernel)【4】Pengamatan perkakasan: 1.io pemetaan sumber ioremap(), kernel menyediakan fungsi perpustakaan gpio 2. Daftar gangguan. ------->(berkaitan perkakasan)
【5】Bina struktur operasi_fail-------->
[6] Laksanakan kaedah pengendalian perkakasan xxx_open(), xxx_write()...
Inferens: Bukan sahaja bahagian keempat daripada keseluruhan proses berkaitan dengan perkakasan, tetapi selebihnya adalah operasi yang serupa Untuk menyusun pemacu peranti dengan mudah (tanpa mencipta semula roda) dan menjimatkan tenaga manusia, model pemacu peranti dicadangkan untuk memudahkan peranti. proses penyusunan pemandu.
2. Rangka kerja model pemacu peranti
Anda boleh melihat objek bas melalui sistem fail maya sysfs (mengambil USB sebagai contoh)
二
, pengaturcaraan model bas BUS Peta konsep
1.Objek bas
【1】structbus_type: Institusi latihan linux objek bas, menerangkan bas, mengurus peranti dan pemandu
pengaturcaraan pemandu linux, dipadankan dengan sempurna.
<span class="token keyword">struct</span> bus_type <span class="token punctuation">{</span><span class="token comment">//只列举重要成员</span>
<span class="token keyword">const</span> <span class="token keyword">char</span> <span class="token operator">*</span>name<span class="token punctuation">;</span> <span class="token comment">//总线名字</span>
<span class="token keyword">int</span> <span class="token punctuation">(</span><span class="token operator">*</span>match<span class="token punctuation">)</span><span class="token punctuation">(</span><span class="token keyword">struct</span> device <span class="token operator">*</span>dev<span class="token punctuation">,</span> <span class="token keyword">struct</span> device_driver <span class="token operator">*</span>drv<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//匹配方法</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
【2】Daftar dan log keluar bas
<span class="token keyword">int</span> <span class="token function">bus_register</span><span class="token punctuation">(</span><span class="token keyword">struct</span> bus_type <span class="token operator">*</span>bus<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">void</span> <span class="token function">bus_unregister</span><span class="token punctuation">(</span><span class="token keyword">struct</span> bus_type <span class="token operator">*</span>bus<span class="token punctuation">)</span><span class="token punctuation">;</span>
【3】Bina bas
<span class="token macro property">#<span class="token directive keyword">include</span> <span class="token string"></span></span>
<span class="token macro property">#<span class="token directive keyword">include</span> <span class="token string"></span></span>
<span class="token macro property">#<span class="token directive keyword">include</span> <span class="token string"></span></span>
<span class="token comment">//实例化一个bus对象</span>
<span class="token keyword">struct</span> bus_type mybus <span class="token operator">=</span> <span class="token punctuation">{</span>
<span class="token punctuation">.</span>name <span class="token operator">=</span> <span class="token string">"mybus"</span><span class="token punctuation">,</span>
<span class="token punctuation">.</span>match <span class="token operator">=</span> mybus_match<span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token function">EXPORT_SYMBOL</span><span class="token punctuation">(</span>mybus<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">//导出总线对象，让device对象和driver对象使用</span>
<span class="token keyword">static</span> <span class="token keyword">int</span> __init <span class="token function">mybus_init</span><span class="token punctuation">(</span><span class="token keyword">void</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"------%s---------n"</span><span class="token punctuation">,</span>__FUNCTION__<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">int</span> ret<span class="token punctuation">;</span>
<span class="token comment">//构建一个总线结果:/sys/bus/mybus</span>
ret <span class="token operator">=</span> <span class="token function">bus_register</span><span class="token punctuation">(</span><span class="token operator">&</span>mybus<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span><span class="token punctuation">(</span>ret <span class="token operator">!=</span> <span class="token number">0</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"bus_register errorn"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> ret<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">static</span> <span class="token keyword">void</span> __exit <span class="token function">mybus_exit</span><span class="token punctuation">(</span><span class="token keyword">void</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"------%s---------n"</span><span class="token punctuation">,</span>__FUNCTION__<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">bus_unregister</span><span class="token punctuation">(</span><span class="token operator">&</span>mybus<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">module_init</span><span class="token punctuation">(</span>mybus_init<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">module_exit</span><span class="token punctuation">(</span>mybus_exit<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">MODULE_LICENSE</span><span class="token punctuation">(</span><span class="token string">"GPL"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
2.objek peranti
【1】objek peranti: objek peranti, menerangkan maklumat peranti, termasuk alamat, gangguan dan data lain
<span class="token keyword">struct</span> device <span class="token punctuation">{</span><span class="token comment">//只列举重要成员</span>
<span class="token keyword">struct</span> kobject kobj<span class="token punctuation">;</span> <span class="token comment">//所有对象的父类</span>
<span class="token keyword">const</span> <span class="token keyword">char</span> <span class="token operator">*</span>init_name<span class="token punctuation">;</span><span class="token comment">//在/sys/bus/mybus/device的名字，用于在总线中匹配</span>
<span class="token keyword">struct</span> bus_type <span class="token operator">*</span>bus<span class="token punctuation">;</span> <span class="token comment">//指向该device对象依附的总线对象</span>
<span class="token keyword">void</span> <span class="token operator">*</span>platform_data<span class="token punctuation">;</span> <span class="token comment">//自定义的数据，指向任何类型的数据</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
【2】Daftar dan log keluar bas
<span class="token keyword">int</span> <span class="token function">device_register</span><span class="token punctuation">(</span><span class="token keyword">struct</span> device <span class="token operator">*</span>dev<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">void</span> <span class="token function">device_unregister</span><span class="token punctuation">(</span><span class="token keyword">struct</span> device <span class="token operator">*</span>dev<span class="token punctuation">)</span><span class="token punctuation">;</span>
【3】Tulis objek peranti
定义一个描述设备的信息的结构体，匹配成功以后让driver对象在总线中领到device对象的信息，实现分离。
<span class="token macro property">#<span class="token directive keyword">include</span> <span class="token string"></span></span>
<span class="token macro property">#<span class="token directive keyword">include</span> <span class="token string"></span></span>
<span class="token macro property">#<span class="token directive keyword">include</span> <span class="token string"></span></span>
<span class="token keyword">extern</span> <span class="token keyword">struct</span> bus_type mybus<span class="token punctuation">;</span>
<span class="token keyword">struct</span> mydev_desc<span class="token punctuation">{</span>
<span class="token keyword">char</span><span class="token operator">*</span> name<span class="token punctuation">;</span>
<span class="token keyword">int</span> irqno<span class="token punctuation">;</span>
<span class="token keyword">unsigned</span> <span class="token keyword">long</span> addr<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token keyword">struct</span> mydev_desc deviofo <span class="token operator">=</span> <span class="token punctuation">{</span>
<span class="token punctuation">.</span>name <span class="token operator">=</span> <span class="token string">"hqs"</span><span class="token punctuation">,</span>
<span class="token punctuation">.</span>irqno <span class="token operator">=</span> <span class="token number">8877</span><span class="token punctuation">,</span>
<span class="token punctuation">.</span>addr <span class="token operator">=</span> <span class="token number">0x12345678</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token keyword">void</span> <span class="token function">mydev_release</span><span class="token punctuation">(</span><span class="token keyword">struct</span> device<span class="token operator">*</span> dev<span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"------%s---------n"</span><span class="token punctuation">,</span>__FUNCTION__<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">//构建一个device对象</span>
<span class="token keyword">struct</span> device mydev <span class="token operator">=</span> <span class="token punctuation">{</span>
<span class="token punctuation">.</span>init_name <span class="token operator">=</span> <span class="token string">"fsdev_drv"</span><span class="token punctuation">,</span>
<span class="token punctuation">.</span>bus <span class="token operator">=</span> <span class="token operator">&</span>mybus<span class="token punctuation">,</span>
<span class="token punctuation">.</span>release <span class="token operator">=</span> mydev_release<span class="token punctuation">,</span>
<span class="token punctuation">.</span>platform_data <span class="token operator">=</span> <span class="token operator">&</span>deviofo<span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token keyword">static</span> <span class="token keyword">int</span> __init <span class="token function">mydev_init</span><span class="token punctuation">(</span><span class="token keyword">void</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"------%s---------n"</span><span class="token punctuation">,</span>__FUNCTION__<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">int</span> ret<span class="token punctuation">;</span>
<span class="token comment">//将device注册到总线中</span>
ret <span class="token operator">=</span> <span class="token function">device_register</span><span class="token punctuation">(</span><span class="token operator">&</span>mydev<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span><span class="token punctuation">(</span>ret <span class="token operator"><</span> <span class="token number">0</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"device_register errorn"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> ret<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">static</span> <span class="token keyword">void</span> __exit <span class="token function">mydev_exit</span><span class="token punctuation">(</span><span class="token keyword">void</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"------%s---------n"</span><span class="token punctuation">,</span>__FUNCTION__<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">device_unregister</span><span class="token punctuation">(</span><span class="token operator">&</span>mydev<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">module_init</span><span class="token punctuation">(</span>mydev_init<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">module_exit</span><span class="token punctuation">(</span>mydev_exit<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">MODULE_LICENSE</span><span class="token punctuation">(</span><span class="token string">"GPL"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
3.driver对象
【1】driver对象：描述设备驱动发的方式
<span class="token keyword">struct</span> device_driver <span class="token punctuation">{</span><span class="token comment">//只列举重要成员</span>
<span class="token keyword">const</span> <span class="token keyword">char</span> <span class="token operator">*</span>name<span class="token punctuation">;</span><span class="token comment">//在/sys/bus/mybus/driver的名字，用于在总线中匹配</span>
<span class="token keyword">struct</span> bus_type <span class="token operator">*</span>bus<span class="token punctuation">;</span><span class="token comment">//指向该device对象依附的总线对象</span>
<span class="token keyword">int</span> <span class="token punctuation">(</span><span class="token operator">*</span>probe<span class="token punctuation">)</span> <span class="token punctuation">(</span><span class="token keyword">struct</span> device <span class="token operator">*</span>dev<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">//device和driver匹配之后要做的事情</span>
<span class="token keyword">int</span> <span class="token punctuation">(</span><span class="token operator">*</span>remove<span class="token punctuation">)</span> <span class="token punctuation">(</span><span class="token keyword">struct</span> device <span class="token operator">*</span>dev<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">//device和driver分离之后要做的事情</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
【2】注册和注销总线
<span class="token keyword">int</span> <span class="token function">driver_register</span><span class="token punctuation">(</span><span class="token keyword">struct</span> device_driver <span class="token operator">*</span>drv<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">void</span> <span class="token function">driver_unregister</span><span class="token punctuation">(</span><span class="token keyword">struct</span> device_driver <span class="token operator">*</span>drv<span class="token punctuation">)</span><span class="token punctuation">;</span>
【3】编写driver对象
匹配成功以后可以在总线中领到device对象的数据，具体实现在probe函数里。
<span class="token macro property">#<span class="token directive keyword">include</span> <span class="token string"></span></span>
<span class="token macro property">#<span class="token directive keyword">include</span> <span class="token string"></span></span>
<span class="token macro property">#<span class="token directive keyword">include</span> <span class="token string"></span></span>
<span class="token macro property">#<span class="token directive keyword">include</span> <span class="token string"></span></span>
<span class="token keyword">extern</span> <span class="token keyword">struct</span> bus_type mybus<span class="token punctuation">;</span>
<span class="token keyword">struct</span> mydev_desc<span class="token punctuation">{</span>
<span class="token keyword">char</span><span class="token operator">*</span> name<span class="token punctuation">;</span>
<span class="token keyword">int</span> irqno<span class="token punctuation">;</span>
<span class="token keyword">unsigned</span> <span class="token keyword">long</span> addr<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token keyword">struct</span> mydev_desc<span class="token operator">*</span> pdesc<span class="token punctuation">;</span>
<span class="token keyword">int</span> <span class="token function">mydrv_probe</span><span class="token punctuation">(</span><span class="token keyword">struct</span> device <span class="token operator">*</span>dev<span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"------%s---------n"</span><span class="token punctuation">,</span>__FUNCTION__<span class="token punctuation">)</span><span class="token punctuation">;</span>
pdesc <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token keyword">struct</span> mydev_desc<span class="token operator">*</span><span class="token punctuation">)</span>dev<span class="token operator">-></span>platform_data<span class="token punctuation">;</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"name =%sn"</span><span class="token punctuation">,</span>pdesc<span class="token operator">-></span>name<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"irqno = %dn"</span><span class="token punctuation">,</span>pdesc<span class="token operator">-></span>irqno<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">unsigned</span> <span class="token keyword">long</span> <span class="token operator">*</span> paddr <span class="token operator">=</span> <span class="token function">ioremap</span><span class="token punctuation">(</span>pdesc<span class="token operator">-></span>addr<span class="token punctuation">,</span> <span class="token number">8</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">int</span> mydrv_remove <span class="token punctuation">(</span><span class="token keyword">struct</span> device <span class="token operator">*</span>dev<span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"------%s---------n"</span><span class="token punctuation">,</span>__FUNCTION__<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">//构建一个driver对象</span>
<span class="token keyword">struct</span> device_driver mydrv <span class="token operator">=</span> <span class="token punctuation">{</span>
<span class="token punctuation">.</span>name <span class="token operator">=</span> <span class="token string">"fsdev_drv"</span><span class="token punctuation">,</span>
<span class="token punctuation">.</span>bus <span class="token operator">=</span> <span class="token operator">&</span>mybus<span class="token punctuation">,</span>
<span class="token punctuation">.</span>probe <span class="token operator">=</span> mydrv_probe<span class="token punctuation">,</span>
<span class="token punctuation">.</span>remove <span class="token operator">=</span> mydrv_remove<span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token keyword">static</span> <span class="token keyword">int</span> __init <span class="token function">mydrv_init</span><span class="token punctuation">(</span><span class="token keyword">void</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"------%s---------n"</span><span class="token punctuation">,</span>__FUNCTION__<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">int</span> ret<span class="token punctuation">;</span>
<span class="token comment">//将device注册到总线中</span>
ret <span class="token operator">=</span> <span class="token function">driver_register</span><span class="token punctuation">(</span><span class="token operator">&</span>mydrv<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span><span class="token punctuation">(</span>ret <span class="token operator"><</span> <span class="token number">0</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"driver_register errorn"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> ret<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">static</span> <span class="token keyword">void</span> __exit <span class="token function">mydrv_exit</span><span class="token punctuation">(</span><span class="token keyword">void</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"------%s---------n"</span><span class="token punctuation">,</span>__FUNCTION__<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">driver_unregister</span><span class="token punctuation">(</span><span class="token operator">&</span>mydrv<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">module_init</span><span class="token punctuation">(</span>mydrv_init<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">module_exit</span><span class="token punctuation">(</span>mydrv_exit<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">MODULE_LICENSE</span><span class="token punctuation">(</span><span class="token string">"GPL"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
4.device对象和driver对象匹配
【1】实现BUS对象中的match方式（按device对象的名子和driver对象中的名子相匹配）
要注意的是不能直接用device对象中的init_name，而要用device对象中继承的structkobjectkobj;上面的成员name不然会报错
<span class="token keyword">int</span> <span class="token function">mybus_match</span><span class="token punctuation">(</span><span class="token keyword">struct</span> device <span class="token operator">*</span>dev<span class="token punctuation">,</span> <span class="token keyword">struct</span> device_driver <span class="token operator">*</span>drv<span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token comment">//如果匹配成功，match方法一定要返回一个1，失败返回0</span>
<span class="token keyword">if</span><span class="token punctuation">(</span><span class="token operator">!</span> <span class="token function">strncmp</span><span class="token punctuation">(</span>drv<span class="token operator">-></span>name<span class="token punctuation">,</span>dev<span class="token operator">-></span>kobj<span class="token punctuation">.</span>name<span class="token punctuation">,</span><span class="token function">strlen</span><span class="token punctuation">(</span>drv<span class="token operator">-></span>name<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"match okn"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> <span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">else</span>
<span class="token punctuation">{</span>
<span class="token function">printk</span><span class="token punctuation">(</span><span class="token string">"match failedn"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">//实例化一个bus对象</span>
<span class="token keyword">struct</span> bus_type mybus <span class="token operator">=</span> <span class="token punctuation">{</span>
<span class="token punctuation">.</span>name <span class="token operator">=</span> <span class="token string">"mybus"</span><span class="token punctuation">,</span>
<span class="token punctuation">.</span>match <span class="token operator">=</span> mybus_match<span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
【2】保证device对象和driver对象的名子一样：例如这儿都使用"fsdev_drv"才能保证能匹配成功
<span class="token comment">//构建一个device对象</span>
<span class="token keyword">struct</span> device mydev <span class="token operator">=</span> <span class="token punctuation">{</span>
<span class="token punctuation">.</span>init_name <span class="token operator">=</span> <span class="token string">"fsdev_drv"</span><span class="token punctuation">,</span>
<span class="token punctuation">.</span>bus <span class="token operator">=</span> <span class="token operator">&</span>mybus<span class="token punctuation">,</span>
<span class="token punctuation">.</span>release <span class="token operator">=</span> mydev_release<span class="token punctuation">,</span>
<span class="token punctuation">.</span>platform_data <span class="token operator">=</span> <span class="token operator">&</span>deviofo<span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token comment">//构建一个driver对象</span>
<span class="token keyword">struct</span> device_driver mydrv <span class="token operator">=</span> <span class="token punctuation">{</span>
<span class="token punctuation">.</span>name <span class="token operator">=</span> <span class="token string">"fsdev_drv"</span><span class="token punctuation">,</span>
<span class="token punctuation">.</span>bus <span class="token operator">=</span> <span class="token operator">&</span>mybus<span class="token punctuation">,</span>
<span class="token punctuation">.</span>probe <span class="token operator">=</span> mydrv_probe<span class="token punctuation">,</span>
<span class="token punctuation">.</span>remove <span class="token operator">=</span> mydrv_remove<span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
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