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Bootloader 可以实现加载启动应用程序、 烧录和升级功能。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-system-d3752e2619" class="topicref" data-id="chapter-system" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-system-d3752e2619-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-system.html" id="chapter-system-d3752e2619-link">系统</a><div class="wh-tooltip"><p class="shortdesc"></p></div></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="chapter-memory-d3752e3709" class="topicref" data-id="chapter-memory" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action chapter-memory-d3752e3709-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-memory-sdk.html" id="chapter-memory-d3752e3709-link">存储</a><div class="wh-tooltip"><p class="shortdesc">SDMC、<span 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concept_mcc_32s_nbc-d3752e4043-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-multi-media-sdk.html" id="concept_mcc_32s_nbc-d3752e4043-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-d3752e5544" 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-d3752e5544-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-interface-sdk.html" id="concept_nww_hzh_pzb-d3752e5544-link">接口</a><div class="wh-tooltip"><p class="shortdesc">CAN<span class="ph">、CAP</span>、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-d3752e6799" class="topicref" 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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">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://aicdocco/taskstopics/sdk/spinor/spinor_user_guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">SPI NOR 使用指南</h1>
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<div class="date inPage">16 May 2025</div><div style="color: gray;">
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Read time: 1 minute(s)
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<div class="- topic/body concept/conbody body conbody">
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<div class="- topic/p p" data-ofbid="d179993e33__20250519091525">SPI NOR 属于 SPI 的从设备，在内核中相关驱动通过 <code class="+ topic/ph pr-d/codeph ph codeph">SPI MEM</code> 对接到 SPI 子系统。 在 SPI 控制器初始化时，SPI
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驱动会检查该控制器下是否有挂载的 SPI NOR，有则添加到 SPI BUS
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中。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_nor_user_guide__codeblock_lw1_f5y_c1c" data-ofbid="spi_nor_user_guide__codeblock_lw1_f5y_c1c">aic_spi_probe(dev);
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|-> spi_register_controller(ctlr);/spi_register_master(ctlr);<em class="hl-comment">// spi_register_master 是一个宏</em>
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|-> of_register_spi_devices(ctlr);
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|-> spi = of_register_spi_device(ctlr, nc);
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|-> spi = spi_alloc_device(ctlr);
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|-> of_spi_parse_dt(ctlr, spi, nc);
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|-> rc = spi_add_device(spi);
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<em class="hl-comment">// 将 SPI device 添加到 SPI 总线 spi_bus_type 中</em></pre></div>
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<p class="- topic/p p" data-ofbid="d179993e41__20250519091525">在调用 <code class="+ topic/ph pr-d/codeph ph codeph">spi_add_device</code> 的过程中，会查找和匹配对应设备的驱动程序（如果这时候对
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应的驱动程序还没有被添加到系统中，则在这里先将设备添加到 Bus，等到对应驱动程序 被添加进来时，再进行匹配。）</p>
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<div class="table-container"><table class="- topic/table table frame-all" id="spi_nor_user_guide__table_ebl_25y_c1c" data-ofbid="spi_nor_user_guide__table_ebl_25y_c1c" data-cols="2"><caption></caption><colgroup><col style="width:28.653295128939828%"/><col style="width:71.34670487106017%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="spi_nor_user_guide__table_ebl_25y_c1c__entry__1"><p class="- topic/p p" data-ofbid="d179993e60__20250519091525">模块</p></th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="spi_nor_user_guide__table_ebl_25y_c1c__entry__2"><p class="- topic/p p" data-ofbid="d179993e64__20250519091525">驱动源码路径</p></th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="spi_nor_user_guide__table_ebl_25y_c1c__entry__1"><p class="- topic/p p" data-ofbid="d179993e74__20250519091525">Linux</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="spi_nor_user_guide__table_ebl_25y_c1c__entry__2"><p class="- topic/p p" data-ofbid="d179993e78__20250519091525"><span class="+ topic/ph sw-d/filepath ph filepath">source/linux-5.10/drivers/mtd/spi-nor/</span></p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="spi_nor_user_guide__table_ebl_25y_c1c__entry__1"><p class="- topic/p p" data-ofbid="d179993e86__20250519091525">Uboot</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="spi_nor_user_guide__table_ebl_25y_c1c__entry__2"><p class="- topic/p p" data-ofbid="d179993e90__20250519091525"><span class="+ topic/ph sw-d/filepath ph filepath">source/uboot-2021.10/drivers/mtd/spi/</span></p></td>
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