[PATCH v8 0/8] Add VIM4 MCU/FAN support
Daniel Lezcano
daniel.lezcano at oss.qualcomm.com
Wed Jul 8 06:42:01 PDT 2026
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 ?
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