Re: [PATCH v8 0/8] Add VIM4 MCU/FAN support
| Newsgroups | org.infradead.lists.linux-amlogic,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-i2c,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pm |
|---|---|
| Message-ID | <[email protected]> |
On 7/8/26 3:42 PM, Daniel Lezcano wrote: > 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 ? > Sorry for the delay. Yes I defined levels 30-100 in the DT as the MCU register description stated that: `Note: the parameter value of fan normally open is 0x1E~0x64` I didn't find any issue with the stress test, but I will address your concern with a smaller list. >> - 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 ? > MFD seems a good candidate as this patch depends on it. -- Best regards, Ronald _______________________________________________ linux-amlogic mailing list [email protected] http://lists.infradead.org/mailman/listinfo/linux-amlogic