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device-drivers

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Use when writing or debugging Linux drivers: platform, I2C/SPI, device-tree, char-device, IRQ, DMA, regmap, PM, sysfs, udev, NACK, -EREMOTEIO, or probe failures.

.devin/skills/device-drivers/SKILL.md

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Last checked
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Sep 28, 2026
License
Apache-2.0

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# Linux device drivers

## Contract

| Field | Bound contract |
|---|---|
| Trigger | Writing or debugging a Linux device driver in platform, I2C, or SPI form, including its device-tree description, char-device interface, threaded IRQ, DMA, regmap, runtime PM, sysfs, deferred-probe, or udev path. |
| Authority | Reversible local: writes only driver source, Kconfig and Makefile entries, DTS/DTSI, binding and overlay files, and udev rule files inside the project tree; rollback is version control. No remote mutation. |
| Side effect | Local edits to driver, build, device-tree, binding, overlay, and udev files; guidance and debug commands in chat. |
| Done | The device description matches its hardware and driver table, the driver probes and unbinds cleanly, char, IRQ, DMA, bus, and PM paths use the correct APIs, and every observed symptom maps to one checked cause. |

## Inputs

1. Driver code or symptom (required): source under review, a probe failure, an IRQ storm, a missing `/dev` node, NACK or `-EREMOTEIO`, or DMA corruption.