Re: [PATCH v8 0/8] Add VIM4 MCU/FAN support

From: Daniel Lezcano

Date: Wed Jul 08 2026 - 09:50:17 EST


On 7/2/26 11:55, Ronald Claveau via B4 Relay wrote:
The Khadas VIM4 board features a different MCU variant compared to
previous VIM boards.
While it shares the same I2C-based communication model,
it differs in some ways:

- A distinct register map with its own volatile/writeable register set
- A fan control with 0–100 levels instead of the 0–3 levels previously

That means for a eg. 100 ms polling, the first one takes 10s to reach the max speed, while the second takes 300ms, right ?

- A fan power supply gated through a regulator

This series adds support for this new variant by:

1. Refactoring the khadas-mcu MFD driver to use per-variant data
structures (regmap config, cells, fan platform data),
and adding the khadas,vim4-mcu compatible string.

2. Extending the fan thermal driver to retrieve the fan register
and maximum level from platform_data,
and to optionally manage a power regulator for the fan supply.

Through which tree do you expect patch 5/8 to go ?