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IWDG device tree configuration - Revision history
2024-03-29T12:54:53Z
Revision history for this page on the wiki
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https://wiki.st.com/stm32mpu-ecosystem-v2/index.php?title=IWDG_device_tree_configuration&diff=71158&oldid=prev
Roullier Christophe at 07:00, 11 June 2020
2020-06-11T07:00:26Z
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 07:00, 11 June 2020</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===DT configuration (STM32 level) ===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===DT configuration (STM32 level) ===</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The IWDG peripheral node is located in ''<del class="diffchange diffchange-inline">stm32mp157c</del>.dtsi'' <ref>{{CodeSource | Linux kernel | arch/arm/boot/dts/<del class="diffchange diffchange-inline">stm32mp157c</del>.dtsi | arch/arm/boot/dts/<del class="diffchange diffchange-inline">stm32mp157c</del>.dtsi}}</ref> file.  </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The IWDG peripheral node is located in ''<ins class="diffchange diffchange-inline">stm32mp151</ins>.dtsi'' <ref>{{CodeSource | Linux kernel | arch/arm/boot/dts/<ins class="diffchange diffchange-inline">stm32mp151</ins>.dtsi | arch/arm/boot/dts/<ins class="diffchange diffchange-inline">stm32mp151</ins>.dtsi}}</ref> file.  </div></td></tr>
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Roullier Christophe
https://wiki.st.com/stm32mpu-ecosystem-v2/index.php?title=IWDG_device_tree_configuration&diff=67805&oldid=prev
Jean Christophe Trotin at 14:36, 6 February 2020
2020-02-06T14:36:15Z
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 14:36, 6 February 2020</td>
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<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">{{ArticleBasedOnModel | [[Peripheral or framework device tree configuration model]]}}</del></div></td><td colspan="2"> </td></tr>
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<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">{{ArticleApprovedVersion | LudovicB | AlexandreT (Passed 4July'18), ChristopheR (Done 4July'18) | No previous approved version | AnneJ - 07Jan'19 - 10152 | 17Jan'19}}</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[Category:Device tree configuration]]</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[Category:Watchdog]]</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></noinclude></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Article purpose ==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Article purpose ==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This article explains how to configure the [[IWDG internal peripheral|'''IWDG''' internal peripheral]] when it is assigned to the Linux<sup>&reg;</sup> OS. In that case, it is controlled by the IWDG Framework (see [[Watchdog overview|watchdog overview]]).</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This article explains how to configure the [[IWDG internal peripheral|'''IWDG''' internal peripheral]] when it is assigned to the Linux<sup>&reg;</sup> OS. In that case, it is controlled by the IWDG Framework (see [[Watchdog overview|watchdog overview]]).</div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Device tree configuration]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Watchdog]]</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">{{ArticleBasedOnModel | Peripheral or framework device tree configuration model}}</ins></div></td></tr>
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Jean Christophe Trotin
https://wiki.st.com/stm32mpu-ecosystem-v2/index.php?title=IWDG_device_tree_configuration&diff=49819&oldid=prev
Frq08988: /* DT configuration (board level) */
2019-01-21T14:01:29Z
<p><span dir="auto"><span class="autocomment">DT configuration (board level)</span></span></p>
<p><b>New page</b></p><div><noinclude><br />
{{ArticleBasedOnModel | [[Peripheral or framework device tree configuration model]]}}<br />
{{ArticleMainWriter | LudovicB}}<br />
{{ArticleApprovedVersion | LudovicB | AlexandreT (Passed 4July'18), ChristopheR (Done 4July'18) | No previous approved version | AnneJ - 07Jan'19 - 10152 | 17Jan'19}}<br />
[[Category:Device tree configuration]]<br />
[[Category:Watchdog]]<br />
</noinclude><br />
<br />
== Article purpose ==<br />
This article explains how to configure the [[IWDG internal peripheral|'''IWDG''' internal peripheral]] when it is assigned to the Linux<sup>&reg;</sup> OS. In that case, it is controlled by the IWDG Framework (see [[Watchdog overview|watchdog overview]]).<br />
<br />
The configuration is performed using the [[Device tree|device tree]] mechanism that provides a hardware description of the IWDG peripheral.<br />
<br />
== DT bindings documentation ==<br />
The [[IWDG internal peripheral|'''IWDG''' internal peripheral]] is a watchdog device. <br />
Refer to st,stm32-iwdg.txt <ref>{{CodeSource | Linux kernel | Documentation/devicetree/bindings/watchdog/st,stm32-iwdg.txt}}</ref> for the corresponding binding document.<br />
<br />
== DT configuration ==<br />
This hardware description is a combination of the '''STM32 microprocessor''' device tree files (''.dtsi'' extension) and '''board''' device tree files (''.dts'' extension). See the [[Device tree]] for an explanation of the device tree file split.<br />
<br />
'''STM32CubeMX''' can be used to generate the board device tree. Refer to [[#How_to_configure_the_DT_using_STM32CubeMX|How to configure the DT using STM32CubeMX]] for more details.<br />
<br />
===DT configuration (STM32 level) ===<br />
The IWDG peripheral node is located in ''stm32mp157c.dtsi'' <ref>{{CodeSource | Linux kernel | arch/arm/boot/dts/stm32mp157c.dtsi | arch/arm/boot/dts/stm32mp157c.dtsi}}</ref> file. <br />
<br />
<pre><br />
iwdg2: iwdg@5a002000 {<br />
compatible = "st,stm32mp1-iwdg";<br />
reg = <0x5a002000 0x400>; /* Registers location and length */<br />
clocks = <&rcc IWDG2>, <&rcc CK_LSI>; /* phandles on clocks needed */<br />
clock-names = "pclk", "lsi";<br />
status = "disabled";<br />
};<br />
</pre><br />
{{Warning|This device tree part is related to STM32 microprocessors. It should be kept as is, without being modified by the end-user.}}<br />
<br />
=== DT configuration (board level) ===<br />
This part is used to enable the IWDG hardware on a board, and define a custom timeout (timeout-sec) in seconds:<br />
<pre><br />
&iwdg2 {<br />
timeout-sec = <32>; /* Watchdog timeout value in seconds */<br />
status = "okay";<br />
};<br />
</pre><br />
<br />
=== DT configuration examples ===<br />
Only the timeout-sec parameter can be modified, as illustrated above.<br />
<br />
==How to configure the DT using STM32CubeMX==<br />
The [[STM32CubeMX]] tool can be used to configure the STM32MPU device and get the corresponding [[Device_tree#STM32|platform configuration device tree]] files.<br /><br />
The STM32CubeMX may not support all the properties described in the above [[#DT bindings documentation|DT bindings documentation]] paragraph. If so, the tool inserts '''user sections''' in the generated device tree. These sections can then be edited to add some properties and they are preserved from one generation to another. Refer to [[STM32CubeMX]] user manual for further information.<br />
<br />
==References==<br />
<references /></div>
Frq08988