platform/x86: thinkpad_acpi: Fix fan speed reporting on Edge E330

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The ThinkPad Edge E330 with H3 firmware uses the non-standard EC fan
register block. Without a matching quirk, thinkpad_acpi reads the legacy
tachometer registers and reports 0 RPM.

Add the H3 BIOS family to TPACPI_FAN_NS so the driver reads the fan
period from EC register 0x95 using the existing non-standard reporting
path.

Tested on a ThinkPad Edge E330 with BIOS H3ET77WW and EC H3EC35WW.

Signed-off-by: Andrew Onyshchuk <andryk.rv@gmail.com>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Link: https://patch.msgid.link/20260806154417.618575-1-andryk.rv@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

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Andrew Onyshchuk 2026-08-06 08:44:17 -07:00 • committed by Ilpo Järvinen

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drivers/platform/x86/lenovo/thinkpad_acpi.c

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