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href="../../../topics/sdk/tsensor/tsensor-user-guide.html" id="tsensor-d4445e3676-link">TSensor 使用指南</a></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="watchdog-d4445e3802" class="topicref" data-id="watchdog" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action watchdog-d4445e3802-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/watchdog/watchdog-user-guide.html" id="watchdog-d4445e3802-link">Watchdog 使用指南</a></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem"><div data-tocid="watchdog_configuration-d4445e3816" class="topicref" data-id="watchdog_configuration" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/watchdog/watchdog-config.html" id="watchdog_configuration-d4445e3816-link">Watchdog 配置</a></div></div></li><li role="treeitem"><div data-tocid="watchdog_debug_guide-d4445e3830" class="topicref" data-id="watchdog_debug_guide" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/watchdog/watchdog-debug.html" id="watchdog_debug_guide-d4445e3830-link">调试指南</a></div></div></li><li role="treeitem"><div data-tocid="watchdog_test_guide-d4445e3844" class="topicref" data-id="watchdog_test_guide" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/watchdog/watchdog-test-guide.html" id="watchdog_test_guide-d4445e3844-link">测试指南</a></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="watchdog_design_intro-d4445e3858" class="topicref" data-id="watchdog_design_intro" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action watchdog_design_intro-d4445e3858-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/watchdog/watchdog-design.html" 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class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/watchdog/watchdog-interface-design.html" id="Watchdog_interface_design-d4445e3900-link">接口设计</a></div></div></li><li role="treeitem"><div data-tocid="watchdog_demo-d4445e3914" class="topicref" data-id="watchdog_demo" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/watchdog/watchdog-demo.html" id="watchdog_demo-d4445e3914-link">Demo</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="watchdog_common_issues-d4445e3928" class="topicref" data-id="watchdog_common_issues" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action watchdog_common_issues-d4445e3928-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/watchdog/watchdog-faq.html" id="watchdog_common_issues-d4445e3928-link">常见问题</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="wri-d4445e3956" class="topicref" data-id="wri" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action wri-d4445e3956-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/wri/wri-user-guide.html" id="wri-d4445e3956-link">WRI 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-memory-d4445e4054" class="topicref" data-id="chapter-memory" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-memory-d4445e4054-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-memory-sdk.html" id="chapter-memory-d4445e4054-link">存储</a><div class="wh-tooltip"><p class="shortdesc">SDMC、SPI NAND、SPI NOR 等存储模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_mcc_32s_nbc-d4445e4438" class="topicref" data-id="concept_mcc_32s_nbc" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_mcc_32s_nbc-d4445e4438-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-multi-media-sdk.html" id="concept_mcc_32s_nbc-d4445e4438-link">多媒体</a><div class="wh-tooltip"><p class="shortdesc">GE、VE、Display、DVP、MPP、MPP 播放器等多媒体模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_nww_hzh_pzb-d4445e5947" class="topicref" data-id="concept_nww_hzh_pzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_nww_hzh_pzb-d4445e5947-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-interface-sdk.html" id="concept_nww_hzh_pzb-d4445e5947-link">接口</a><div class="wh-tooltip"><p class="shortdesc">CAN、CIR、GPAI、GPIO、I2C、PSADC、PWM 等接口模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d4445e7944" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d4445e7944-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d4445e7944-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
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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" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/watchdog/watchdog-interface-design.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">接口设计</h1>
|
||
|
||
<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
|
||
Read time: 3 minute(s)
|
||
</div>
|
||
<div class="- topic/body concept/conbody body conbody">
|
||
<p class="- topic/p p" data-ofbid="d115244e33__20250123155210">以下接口是 Linux Watchdog 子系统需要的标准接口。</p>
|
||
<section class="- topic/section section" id="Watchdog_interface_design__section_vvn_1gt_c1c" data-ofbid="Watchdog_interface_design__section_vvn_1gt_c1c"><h2 class="- topic/title title sectiontitle">外部接口</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d115244e41__20250123155210">Linux 对用户态提供了一组 Watchdog 的 ioctl 接口，用户态可以通过设备节点 <span class="+ topic/ph sw-d/filepath ph filepath">/dev/watchdogX</span>
|
||
来访问：（详见
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">include/upai/linux/watchdog.h</span>）<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="Watchdog_interface_design__codeblock_vrx_bgt_c1c" data-ofbid="Watchdog_interface_design__codeblock_vrx_bgt_c1c"><code><strong class="hl-keyword">struct</strong> watchdog_info {
|
||
__u32 options; <em class="hl-comment">/* Options the card/driver supports */</em>
|
||
__u32 firmware_version; <em class="hl-comment">/* Firmware version of the card */</em>
|
||
__u8 identity[<span class="hl-number">32</span>]; <em class="hl-comment">/* Identity of the board */</em>
|
||
};
|
||
|
||
#<span class="hl-directive">define</span> WDIOC_GETSUPPORT _IOR(WATCHDOG_IOCTL_BASE, <span class="hl-number">0</span>, <strong class="hl-keyword">struct</strong> watchdog_info)
|
||
#<span class="hl-directive">define</span> WDIOC_GETSTATUS _IOR(WATCHDOG_IOCTL_BASE, <span class="hl-number">1</span>, <strong class="hl-keyword">int</strong>)
|
||
#<span class="hl-directive">define</span> WDIOC_GETBOOTSTATUS _IOR(WATCHDOG_IOCTL_BASE, <span class="hl-number">2</span>, <strong class="hl-keyword">int</strong>)
|
||
#<span class="hl-directive">define</span> WDIOC_GETTEMP _IOR(WATCHDOG_IOCTL_BASE, <span class="hl-number">3</span>, <strong class="hl-keyword">int</strong>)
|
||
#<span class="hl-directive">define</span> WDIOC_SETOPTIONS _IOR(WATCHDOG_IOCTL_BASE, <span class="hl-number">4</span>, <strong class="hl-keyword">int</strong>)
|
||
#<span class="hl-directive">define</span> WDIOC_KEEPALIVE _IOR(WATCHDOG_IOCTL_BASE, <span class="hl-number">5</span>, <strong class="hl-keyword">int</strong>)
|
||
#<span class="hl-directive">define</span> WDIOC_SETTIMEOUT _IOWR(WATCHDOG_IOCTL_BASE, <span class="hl-number">6</span>, <strong class="hl-keyword">int</strong>)
|
||
#<span class="hl-directive">define</span> WDIOC_GETTIMEOUT _IOR(WATCHDOG_IOCTL_BASE, <span class="hl-number">7</span>, <strong class="hl-keyword">int</strong>)
|
||
#<span class="hl-directive">define</span> WDIOC_SETPRETIMEOUT _IOWR(WATCHDOG_IOCTL_BASE, <span class="hl-number">8</span>, <strong class="hl-keyword">int</strong>)
|
||
#<span class="hl-directive">define</span> WDIOC_GETPRETIMEOUT _IOR(WATCHDOG_IOCTL_BASE, <span class="hl-number">9</span>, <strong class="hl-keyword">int</strong>)
|
||
#<span class="hl-directive">define</span> WDIOC_GETTIMELEFT _IOR(WATCHDOG_IOCTL_BASE, <span class="hl-number">10</span>, <strong class="hl-keyword">int</strong>)</code></pre></div>
|
||
<p class="- topic/p p" data-ofbid="d115244e52__20250123155210"><a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="watchdog-demo.html">Demo</a> 就是调用的这些接口 Watchdog 的访问。</p>
|
||
</section>
|
||
<section class="- topic/section section" id="Watchdog_interface_design__section_jcj_lgt_c1c" data-ofbid="Watchdog_interface_design__section_jcj_lgt_c1c"><h2 class="- topic/title title sectiontitle">内部接口</h2>
|
||
|
||
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="Watchdog_interface_design__table_jck_jgt_c1c" data-ofbid="Watchdog_interface_design__table_jck_jgt_c1c" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_wdt_start</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="Watchdog_interface_design__table_jck_jgt_c1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="Watchdog_interface_design__table_jck_jgt_c1c__entry__2">static int aic_wdt_start(struct watchdog_device
|
||
*wdt_dev)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_jck_jgt_c1c__entry__1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_jck_jgt_c1c__entry__2">使能一个 Watchdog 通道（device）</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_jck_jgt_c1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_jck_jgt_c1c__entry__2">wdt_dev - 指向 Watchdog 设备的指针</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_jck_jgt_c1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_jck_jgt_c1c__entry__2">0，成功</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="Watchdog_interface_design__table_jck_jgt_c1c__entry__1">注意事项</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="Watchdog_interface_design__table_jck_jgt_c1c__entry__2">如果当前通道的 Watchdog 已经是使能状态，将执行 ping 操作（喂狗）。</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="Watchdog_interface_design__table_kck_jgt_c1c" data-ofbid="Watchdog_interface_design__table_kck_jgt_c1c" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 2</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_wdt_stop</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="Watchdog_interface_design__table_kck_jgt_c1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="Watchdog_interface_design__table_kck_jgt_c1c__entry__2">static int aic_wdt_stop(struct watchdog_device
|
||
*wdt_dev)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_kck_jgt_c1c__entry__1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_kck_jgt_c1c__entry__2">关闭一个 Watchdog 通道（device）</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_kck_jgt_c1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_kck_jgt_c1c__entry__2">wdt_dev - 指向 Watchdog 设备的指针</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_kck_jgt_c1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_kck_jgt_c1c__entry__2">0，成功</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="Watchdog_interface_design__table_kck_jgt_c1c__entry__1">注意事项</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="Watchdog_interface_design__table_kck_jgt_c1c__entry__2">-</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="Watchdog_interface_design__table_lck_jgt_c1c" data-ofbid="Watchdog_interface_design__table_lck_jgt_c1c" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_wdt_pin</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="Watchdog_interface_design__table_lck_jgt_c1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="Watchdog_interface_design__table_lck_jgt_c1c__entry__2">static int aic_wdt_ping(struct watchdog_device
|
||
*wdt_dev)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_lck_jgt_c1c__entry__1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_lck_jgt_c1c__entry__2">清零指定的 Watchdog 通道计数器，相当于“喂狗”操作</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_lck_jgt_c1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_lck_jgt_c1c__entry__2">wdt_dev - 指向 Watchdog 设备的指针</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_lck_jgt_c1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_lck_jgt_c1c__entry__2">0，成功</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="Watchdog_interface_design__table_lck_jgt_c1c__entry__1">注意事项</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="Watchdog_interface_design__table_lck_jgt_c1c__entry__2">需要先调用 aic_wdt_start()，再调用此接口</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="Watchdog_interface_design__table_mck_jgt_c1c" data-ofbid="Watchdog_interface_design__table_mck_jgt_c1c" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 4</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_wdt_set_timeout</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="Watchdog_interface_design__table_mck_jgt_c1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="Watchdog_interface_design__table_mck_jgt_c1c__entry__2">static int aic_wdt_set_timeout(struct watchdog_device
|
||
*wdt_dev, unsigned int timeout)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_mck_jgt_c1c__entry__1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_mck_jgt_c1c__entry__2">给指定的 Watchdog 设备设置一个超时</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_mck_jgt_c1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_mck_jgt_c1c__entry__2">wdt_dev - 指向 Watchdog 设备的指针 timetout - 超时的数值，单位：秒</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_mck_jgt_c1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_mck_jgt_c1c__entry__2">0，成功</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="Watchdog_interface_design__table_mck_jgt_c1c__entry__1">注意事项</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="Watchdog_interface_design__table_mck_jgt_c1c__entry__2">1. 在 Watchdog 初始化时配置的最大、最小 timeout 参数，Watchdog
|
||
Core 会去做校验，如果超出范围，将采用上一次有效的 timeout 参数值。2.
|
||
clr_thd 会和 timeout 一起设置到 Watchdog 控制器。</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="Watchdog_interface_design__table_nck_jgt_c1c" data-ofbid="Watchdog_interface_design__table_nck_jgt_c1c" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 5</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_wdt_set_pretimeout</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="Watchdog_interface_design__table_nck_jgt_c1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="Watchdog_interface_design__table_nck_jgt_c1c__entry__2">static int aic_wdt_set_pretimeout(struct watchdog_device
|
||
*wdt_dev,unsigned int pretimeout)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_nck_jgt_c1c__entry__1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_nck_jgt_c1c__entry__2">给指定的 Watchdog 设备设置一个预超时</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_nck_jgt_c1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_nck_jgt_c1c__entry__2">wdt_dev - 指向 Watchdog 设备的指针 pretimetout - 预超时的数值，单位：秒</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_nck_jgt_c1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_nck_jgt_c1c__entry__2">0，成功</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="Watchdog_interface_design__table_nck_jgt_c1c__entry__1">注意事项</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="Watchdog_interface_design__table_nck_jgt_c1c__entry__2">pretimeout 必须要小于该 Watchdog 通道的 timeout 参数，这个有效性检查会在 Core 中去做（所以合理的 ioctl 操作是先设置 timeout、再设置 pretimeout），如果 pretimeout 无效将返回出错。</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="Watchdog_interface_design__table_pck_jgt_c1c" data-ofbid="Watchdog_interface_design__table_pck_jgt_c1c" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 6</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_wdt_restart</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="Watchdog_interface_design__table_pck_jgt_c1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="Watchdog_interface_design__table_pck_jgt_c1c__entry__2">static int aic_wdt_restart(struct watchdog_device
|
||
*wdt_dev,unsigned long action, void *data)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_pck_jgt_c1c__entry__1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_pck_jgt_c1c__entry__2">用于重启整个系统（方法是设置 timeout 是 0，Watchdog 会立即触发超时重启）</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_pck_jgt_c1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_pck_jgt_c1c__entry__2">
|
||
<ul class="- topic/ul ul" id="Watchdog_interface_design__ul_djq_nmj_bcc" data-ofbid="Watchdog_interface_design__ul_djq_nmj_bcc">
|
||
<li class="- topic/li li" data-ofbid="d115244e428__20250123155210">wdt_dev - 指向 Watchdog 设备的指针 </li>
|
||
<li class="- topic/li li" data-ofbid="d115244e431__20250123155210">action - 需要执行的操作类型（定义详见“注意事项”），目前统一按重启处理 </li>
|
||
<li class="- topic/li li" data-ofbid="d115244e434__20250123155210">data - 附加数据，暂未用到</li>
|
||
</ul>
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</td>
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<tr class="- topic/row">
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="Watchdog_interface_design__table_pck_jgt_c1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="Watchdog_interface_design__table_pck_jgt_c1c__entry__2">0，成功</td>
|
||
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|
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<tr class="- topic/row">
|
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="Watchdog_interface_design__table_pck_jgt_c1c__entry__1">注意事项</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="Watchdog_interface_design__table_pck_jgt_c1c__entry__2">-</td>
|
||
</tr>
|
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</tbody></table></div>
|
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<div class="- topic/p p" data-ofbid="d115244e461__20250123155210">action 的定义详见
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">include/linux/reboot.h</span>：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="Watchdog_interface_design__codeblock_cfm_sgt_c1c" data-ofbid="Watchdog_interface_design__codeblock_cfm_sgt_c1c"><code>#<span class="hl-directive">define</span> SYS_DOWN <span class="hl-number">0x0001</span> <em class="hl-comment">/* Notify of system down */</em>
|
||
#<span class="hl-directive">define</span> SYS_RESTART SYS_DOWN
|
||
#<span class="hl-directive">define</span> SYS_HALT <span class="hl-number">0x0002</span> <em class="hl-comment">/* Notify of system halt */</em>
|
||
#<span class="hl-directive">define</span> SYS_POWER_OFF <span class="hl-number">0x0003</span> <em class="hl-comment">/* Notify of system power off */</em></code></pre></div>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#Watchdog_interface_design__section_vvn_1gt_c1c" data-tocid="Watchdog_interface_design__section_vvn_1gt_c1c">外部接口</a></div></li><li class="section-item"><div class="section-title"><a href="#Watchdog_interface_design__section_jcj_lgt_c1c" data-tocid="Watchdog_interface_design__section_jcj_lgt_c1c">内部接口</a></div></li></ul></div>
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