Platform Device Model

Purpose

Explain the Linux driver model for platform (and similar) buses: struct device, device_driver, probe/remove, resource acquisition, sysfs, and deferred probe — the glue between device tree and driver code.

When to Use

• Implementing or debugging platform_driver lifecycle
• Exposing driver state via sysfs
• Understanding uevent / udev device node creation
• Before skills/kernel-dev/writing-char-drivers

Workflow

1. Object hierarchy