Generated banner for Jetson Customize Pinmux
Generated logo for Jetson Customize Pinmux

Jetson Customize Pinmux

NVIDIAOfficialCreated by Jetson TeamDistributed by NVIDIA

  • Skill
  • Tool integration
  • Cloud and DevOps
  • Apache-2.0
  • Medium risk
  • Has scripts

From the author

Per-pin SFIO / direction / initial-state configurator for a Jetson Orin or Thor custom carrier from the pinmux XLSM. Do NOT use for kernel-DT overlay or ODMDATA edits.
— the description by Jetson Team

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

The jetson-customize-pinmux skill provides a structured workflow for configuring per-pin SFIO, direction, and initial state for Jetson Orin or Thor custom carriers. It parses the official Tegra pinmux spreadsheet (XLSM) to generate the necessary BCT DTSI files (pinmux, gpio, and padvoltage). The skill ensures that pin configurations are accurately captured, validated, and integrated into the carrier's bootloader configuration, following a strict interactive process to prevent hardware misconfiguration.

What it does

  • Parses Tegra pinmux XLSM files to establish a ground truth for SoC pin configurations.
  • Provides an interactive lookup tool to identify pins by ball name, signal, or DT name.
  • Guides users through a mandatory Q1-Q6 interactive loop to set pin attributes.
  • Generates pinmux, gpio, and padvoltage BCT DTSI files for custom carrier boards.
  • Updates carrier configuration references to include the newly generated DTSI files.
  • Ensures configuration idempotency by using specific markers in the generated files.

When to use it

  • When you need to repurpose a CVM ball (e.g., switching between GPIO and a peripheral function).
  • After deriving a custom carrier and needing to apply specific pinmux settings from an XLSM.
  • When a pin mismatch is reported by other Jetson customization skills.
  • When you need to define initial pin states, drive types, or pull attributes for custom hardware.

Advantages

  • Ensures consistency by using the official XLSM as the single source of truth.
  • Prevents configuration errors through a mandatory, guided per-pin interactive process.
  • Automates the complex generation of three distinct BCT DTSI files.
  • Integrates cleanly with existing Jetson BSP workflows and overlay trackers.

Usage examples

“Configure pin H10 on my custom carrier to act as a GPIO.”
The agent will look up pin H10, confirm it is GPIO-capable, and prompt you through the required direction and initial state settings before generating the updated DTSI files.
“I need to set the drive type for the PCIE4_RST_L signal.”
The agent will identify the corresponding DT pin, check if the pad is configurable, and if so, guide you through the Q4-Q6 attributes including drive type.

Install

  1. Download the skill as a ZIP:

    https://autogineer.com/agent-skills/nvidia/jetson-customize-pinmux/download
  2. Unzip it into the cross-client skills folder of your project:

    mkdir -p .agents/skills && unzip jetson-customize-pinmux.zip -d .agents/skills

Documentation by Jetson Team

Customize pinmux (per-pin SFIO / direction / state)

Overview

The Tegra pinmux spreadsheet (.xlsm) is the ground truth for every CVM ball: SoC pin name, supported SFIOs, customer-selected function, direction, and initial state. This skill parses that XLSM, runs a per-pin Q1–Q6 interactive loop, and emits the three BCT DTSIs (pinmux, gpio, padvoltage) in one shot into the overlay tracker at <source.root_path>/Linux_for_Tegra/bootloader/.

Unlike sibling skills jetson-customize-uphy / jetson-customize-pcie / jetson-customize-camera, pinmux has no kernel-DT overlay surface and no ODMDATA edit. The XLSM is the source of truth; the three emitted DTSIs land at flash time via the carrier conf's PINMUX_CONFIG= / GPIOINT_CONFIG= / PMC_CONFIG= references (which /jetson-derive-carrier set up).

Pad classification (silicon-fixed): only BD* and BI* pads have configurable pull / drive / open-drain attributes. LP5XA_*, UPHYDS_*, DP_SINGLE_*, BDMIPI16X_*, BDUSB2_*, OSCI27_* are fixed-function and skip Q4–Q6 (configurable: no).

The bundled scripts/modify_pinmux.py is the workhorse: it parses the XLSM via openpyxl>=3.1, builds the per-carrier pinmap JSON, captures pin edits into a session shim, and (on generate) writes the three DTSIs.

When to invoke

  • The user says "configure pin", "set SFIO", "edit pinmux DTSI", "set pin direction", "set initial state", or asks to repurpose a CVM ball (e.g. flip a pin between GPIO and a peripheral function).

  • A sibling skill (jetson-customize-camera, jetson-customize-pcie, jetson-customize-usb, jetson-customize-mgbe) reports an HSIO pin mismatch via pin_verifier.py and the user wants to fix it.

  • The user pre-derived a custom carrier with /jetson-derive-carrier and now wants to author the pinmux from a freshly-edited .xlsm.

Prerequisites:

  • Active profile selected (target-platform/active_target.yml → <profile>.yaml with reference_devkit: AND custom_carrier:).

  • <source.root_path>/Linux_for_Tegra/ exists as a git repo (/jetson-init-source).

  • /jetson-derive-carrier has run — the three pinmux-side BCT DTSIs (PINMUX_CONFIG, GPIOINT_CONFIG, PMC_CONFIG references in the carrier conf) exist in the overlay tracker.

  • A pinmux .xlsm is registered in the active profile at documents.custom_carrier_pinmux_xls (preferred when custom-carrier- specific) or documents.ref_devkit_pinmux_xls (fallback). The bundled modify_pinmux.py requires openpyxl>=3.1.

Procedure

See references/procedure.md for the full step-by-step procedure (Steps 1–8). Summary:

  1. Resolve active target + XLSM. Validate active profile, custom_carrier:, overlay-tracker prerequisites; resolve the pinmux .xlsm path from documents.custom_carrier_pinmux_xls → documents.ref_devkit_pinmux_xls → single XLSM under documents.root_path → user prompt.

  2. Probe. Run modify_pinmux.py probe to parse the XLSM into the per-skill scratch <KB>/pinmap/<custom-carrier>.json plus session.json shim.

  3. Lookup. Resolve a free-form user query (CVM ball, Verilog name, signal, DT pin) via modify_pinmux.py lookup; surface supported SFIO list, defaults, and configurable: yes/no.

  4. Set-pin (HARD GATE — Q1–Q6 via AskUserQuestion). Q1–Q3 (sfio / direction / initial_state) always asked; Q4–Q6 (pull / drive_type / open_drain) only when configurable: yes. tristate and e_input are derived from direction, never asked.

  5. Generate. modify_pinmux.py generate --out-dir <source.root_path>/Linux_for_Tegra/bootloader/ (root, not bootloader/generic/BCT/ — derive-carrier .dts forks live there, do not colocate). Emits: tegra<soc>-mb1-bct-{pinmux,gpio,padvoltage}-<carrier-key>.dtsi. <carrier-key> comes from the carrier conf's PINMUX_CONFIG= reference, NOT the kebab-cased carrier name.

  6. Commit (single batched commit per workflow rule). All three DTSIs are one logical edit → one customization commit. Run the commit-preview gate before each commit.

  7. Run-state sidecar + session shim. Write the user-facing <profile-stem>.jetson-customize-pinmux.json sidecar and the transient session.json shim under <workspace>/target-platform/.

  8. Summary. Emit the standard one-line + table summary.

Gotchas

  • No kernel-DT overlay; no OVERLAY_DTB_FILE edit; no render_conf.py hand-off. This skill ends at the three BCT DTSIs — the carrier conf already references them via PINMUX_CONFIG= / GPIOINT_CONFIG= / PMC_CONFIG= (set up by /jetson-derive-carrier).

  • Re-point the .dts wrapper's #include after generate. /jetson-derive-carrier forks the .dts wrappers at bootloader/generic/BCT/, but their #include lines may still pull the upstream devkit .dtsi (e.g. …-p3834-xxxx-p4071-0000.dtsi). After generate writes the new <CARRIER_KEY>.dtsi to bootloader/ root, edit each wrapper's #include to the new filename — by bare basename (#include "tegra<soc>-mb1-bct-pinmux-<CARRIER_KEY>.dtsi"), not ../../… filesystem-relative. The BCT build's cpp -I bootloader/ resolves bare basenames; that's the convention every other BCT include in the tree follows. Roll the wrapper edits into the same customization commit as the three DTSIs. See references/procedure.md Step 5 ("Sanity-check the carrier .dts wrapper").

  • Q4–Q6 gated on configurable: yes. Asking pull / drive_type / open_drain on a fixed-function pad (LP5XA_*, UPHYDS_*, BDMIPI16X_*, etc.) is silently dropped by the script and confuses the user. lookup prints configurable: yes/no — always check it before prompting Q4–Q6.

  • tristate and e_input are derived, never asked. unused → tristate=ENABLE; input / bidirectional → enable-input=ENABLE. Exposing them as separate prompts produces inconsistent DTSIs.

  • sfio=gpio requires a parseable gpio=GPIOn_PD.NN entry in the pinmap row's sfio list. Pins without one are GPIO-incapable silicon; set-pin rejects the call. Surface the rejection — don't silently fall back to a non-GPIO SFIO.

  • Marker idempotency. Every per-pin edit carries // custom-bsp: pinmux on the closing brace; gpio default-state entries carry the same marker as a trailing comment. Re-running generate must detect and update — never duplicate.

  • modify_pinmux.py is unchanged from the original framework — it reads its own session.json shim under --kb-dir. The shim is regenerated each run from the active profile + the user-facing sidecar. Do not hand-edit the shim; it's transient.

  • Multiple pinmux DTSI variants per Thor module SKU. Some carrier pins live in a different DTSI variant than the one the carrier conf references. modify_pinmux.py commit (legacy patch-in-place flow) tolerates missing per-pin blocks via pinmux.warnings[] rather than failing. Surface the warning; point at the alternate DTSI variant.

  • Don't touch the upstream BSP at <bsp_image.root_path>. All edits land in <source.root_path>/Linux_for_Tegra/bootloader/ under the pristine + customization commit pattern.

Available Scripts

ScriptPurposeArguments
scripts/modify_pinmux.pyXLSM parser + per-pin DTSI generator. Invoked via run_script() from Steps 3-6 with the subcommand of the current phase.probe | lookup | set-pin | apply | generate | commit [...] (see --help)
scripts/generate_dtsi.pyRenders pinmux/GPIO/padvoltage DTSI fragments from the bundled session state. Called by modify_pinmux.py generate.--session <path> --out-dir <dir>

Invoke from the skill body as a subprocess via run_script():

# run_script: probe the carrier pinmux XLSM and write a session state
scripts/modify_pinmux.py probe --xlsm carrier.xlsm --session .pinmux-session.json

# run_script: render DTSI fragments from the final session state
scripts/modify_pinmux.py generate --session .pinmux-session.json --out-dir bsp_sources/pinmux/

References

  • references/procedure.md — full Step 1–8 procedure prose.

  • questions.json — Q1–Q6 prompt schema consumed by Step 4.

  • ../../references/platform_template.yaml — documents: block (ref_devkit_pinmux_xls, custom_carrier_pinmux_xls).

  • ../../context/bsp-customization-workflow.md — overlay edit protocol (single-commit per DTSI fork).

  • ../jetson-derive-carrier/SKILL.md — must run first; produces the pinmux / gpio / padvoltage DTSI forks this skill edits, and rewrites the carrier conf's PINMUX_CONFIG= / GPIOINT_CONFIG= / PMC_CONFIG= lines to point at them.

  • ../jetson-init-source/SKILL.md — produces the overlay tracker this skill commits into.

  • ../jetson-link-docs/SKILL.md — author the profile's documents: block, including the pinmux XLSM bindings.

Files

LICENSE

Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.


                                 Apache License
                           Version 2.0, January 2004
                        http://www.apache.org/licenses/

   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

   1. Definitions.

      "License" shall mean the terms and conditions for use, reproduction,
      and distribution as defined by Sections 1 through 9 of this document.

      "Licensor" shall mean the copyright owner or entity authorized by
      the copyright owner that is granting the License.

      "Legal Entity" shall mean the union of the acting entity and all
      other entities that control, are controlled by, or are under common
      control with that entity. For the purposes of this definition,
      "control" means (i) the power, direct or indirect, to cause the
      direction or management of such entity, whether by contract or
      otherwise, or (ii) ownership of fifty percent (50%) or more of the
      outstanding shares, or (iii) beneficial ownership of such entity.

      "You" (or "Your") shall mean an individual or Legal Entity
      exercising permissions granted by this License.

      "Source" form shall mean the preferred form for making modifications,
      including but not limited to software source code, documentation
      source, and configuration files.

      "Object" form shall mean any form resulting from mechanical
      transformation or translation of a Source form, including but
      not limited to compiled object code, generated documentation,
      and conversions to other media types.

      "Work" shall mean the work of authorship, whether in Source or
      Object form, made available under the License, as indicated by a
      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object
      form, that is based on (or derived from) the Work and for which the
      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes
      of this License, Derivative Works shall not include works that remain
      separable from, or merely link (or bind by name) to the interfaces of,
      the Work and Derivative Works thereof.

      "Contribution" shall mean any work of authorship, including
      the original version of the Work and any modifications or additions
      to that Work or Derivative Works thereof, that is intentionally
      submitted to Licensor for inclusion in the Work by the copyright owner
      or by an individual or Legal Entity authorized to submit on behalf of
      the copyright owner. For the purposes of this definition, "submitted"
      means any form of electronic, verbal, or written communication sent
      to the Licensor or its representatives, including but not limited to
      communication on electronic mailing lists, source code control systems,
      and issue tracking systems that are managed by, or on behalf of, the
      Licensor for the purpose of discussing and improving the Work, but
      excluding communication that is conspicuously marked or otherwise
      designated in writing by the copyright owner as "Not a Contribution."

      "Contributor" shall mean Licensor and any individual or Legal Entity
      on behalf of whom a Contribution has been received by Licensor and
      subsequently incorporated within the Work.

   2. Grant of Copyright License. Subject to the terms and conditions of
      this License, each Contributor hereby grants to You a perpetual,
      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
      copyright license to reproduce, prepare Derivative Works of,
      publicly display, publicly perform, sublicense, and distribute the
      Work and such Derivative Works in Source or Object form.

   3. Grant of Patent License. Subject to the terms and conditions of
      this License, each Contributor hereby grants to You a perpetual,
      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
      (except as stated in this section) patent license to make, have made,
      use, offer to sell, sell, import, and otherwise transfer the Work,
      where such license applies only to those patent claims licensable
      by such Contributor that are necessarily infringed by their
      Contribution(s) alone or by combination of their Contribution(s)
      with the Work to which such Contribution(s) was submitted. If You
      institute patent litigation against any entity (including a
      cross-claim or counterclaim in a lawsuit) alleging that the Work
      or a Contribution incorporated within the Work constitutes direct
      or contributory patent infringement, then any patent licenses
      granted to You under this License for that Work shall terminate
      as of the date such litigation is filed.

   4. Redistribution. You may reproduce and distribute copies of the
      Work or Derivative Works thereof in any medium, with or without
      modifications, and in Source or Object form, provided that You
      meet the following conditions:

      (a) You must give any other recipients of the Work or
          Derivative Works a copy of this License; and

      (b) You must cause any modified files to carry prominent notices
          stating that You changed the files; and

      (c) You must retain, in the Source form of any Derivative Works
          that You distribute, all copyright, patent, trademark, and
          attribution notices from the Source form of the Work,
          excluding those notices that do not pertain to any part of
          the Derivative Works; and

      (d) If the Work includes a "NOTICE" text file as part of its
          distribution, then any Derivative Works that You distribute must
          include a readable copy of the attribution notices contained
          within such NOTICE file, excluding those notices that do not
          pertain to any part of the Derivative Works, in at least one
          of the following places: within a NOTICE text file distributed
          as part of the Derivative Works; within the Source form or
          documentation, if provided along with the Derivative Works; or,
          within a display generated by the Derivative Works, if and
          wherever such third-party notices normally appear. The contents
          of the NOTICE file are for informational purposes only and
          do not modify the License. You may add Your own attribution
          notices within Derivative Works that You distribute, alongside
          or as an addendum to the NOTICE text from the Work, provided
          that such additional attribution notices cannot be construed
          as modifying the License.

      You may add Your own copyright statement to Your modifications and
      may provide additional or different license terms and conditions
      for use, reproduction, or distribution of Your modifications, or
      for any such Derivative Works as a whole, provided Your use,
      reproduction, and distribution of the Work otherwise complies with
      the conditions stated in this License.

   5. Submission of Contributions. Unless You explicitly state otherwise,
      any Contribution intentionally submitted for inclusion in the Work
      by You to the Licensor shall be under the terms and conditions of
      this License, without any additional terms or conditions.
      Notwithstanding the above, nothing herein shall supersede or modify
      the terms of any separate license agreement you may have executed
      with Licensor regarding such Contributions.

   6. Trademarks. This License does not grant permission to use the trade
      names, trademarks, service marks, or product names of the Licensor,
      except as required for reasonable and customary use in describing the
      origin of the Work and reproducing the content of the NOTICE file.

   7. Disclaimer of Warranty. Unless required by applicable law or
      agreed to in writing, Licensor provides the Work (and each
      Contributor provides its Contributions) on an "AS IS" BASIS,
      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
      implied, including, without limitation, any warranties or conditions
      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
      PARTICULAR PURPOSE. You are solely responsible for determining the
      appropriateness of using or redistributing the Work and assume any
      risks associated with Your exercise of permissions under this License.

   8. Limitation of Liability. In no event and under no legal theory,
      whether in tort (including negligence), contract, or otherwise,
      unless required by applicable law (such as deliberate and grossly
      negligent acts) or agreed to in writing, shall any Contributor be
      liable to You for damages, including any direct, indirect, special,
      incidental, or consequential damages of any character arising as a
      result of this License or out of the use or inability to use the
      Work (including but not limited to damages for loss of goodwill,
      work stoppage, computer failure or malfunction, or any and all
      other commercial damages or losses), even if such Contributor
      has been advised of the possibility of such damages.

   9. Accepting Warranty or Additional Liability. While redistributing
      the Work or Derivative Works thereof, You may choose to offer,
      and charge a fee for, acceptance of support, warranty, indemnity,
      or other liability obligations and/or rights consistent with this
      License. However, in accepting such obligations, You may act only
      on Your own behalf and on Your sole responsibility, not on behalf
      of any other Contributor, and only if You agree to indemnify,
      defend, and hold each Contributor harmless for any liability
      incurred by, or claims asserted against, such Contributor by reason
      of your accepting any such warranty or additional liability.

   END OF TERMS AND CONDITIONS

   APPENDIX: How to apply the Apache License to your work.

      To apply the Apache License to your work, attach the following
      boilerplate notice, with the fields enclosed by brackets "[]"
      replaced with your own identifying information. (Don't include
      the brackets!)  The text should be enclosed in the appropriate
      comment syntax for the file format. We also recommend that a
      file or class name and description of purpose be included on the
      same "printed page" as the copyright notice for easier
      identification within third-party archives.

   Copyright [yyyy] [name of copyright owner]

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

Requirements and compatibility

Written for: Claude Code

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Needs: Names Claude Code tools, Needs Python

Security

What our scanner noticed· Medium risk

  • Large base64-encoded blobs
  • Scripts that your agent may run

This skill includes scripts that your agent may run. Read them before you use it.

A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.

Attribution and licence

Created by
Jetson Team
Publisher
NVIDIA (Official)
Distributed by
NVIDIA
Source
NVIDIA/skills · skills/jetson-customize-pinmux · commit fce3cca
Licence
Apache License 2.0 (redistribution allowed)
  • LICENSE (added by AutoGineer from LICENSE-APACHE)
  • ATTRIBUTION.md (written by AutoGineer)
Synced

AutoGineer is not affiliated with or endorsed by Jetson Team or NVIDIA.

Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download jetson-customize-pinmux.zip