linux-kernel - [PATCH] Make thinkpad_acpi to support also NEC Lavie X1475JAS

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Message-ID: <20250504165513.295135-1-johnchau@0atlas.com>
Date: Mon,  5 May 2025 01:55:13 +0900
From: John Chau <johnchau@...las.com>
To: Henrique de Moraes Holschuh <hmh@....eng.br>
Cc: ibm-acpi-devel@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	John Chau <johnchau@...las.com>
Subject: [PATCH] Make thinkpad_acpi to support also NEC Lavie X1475JAS

This patch changes get_thinkpad_model_data in thinkpad_acpi.c
to check for additional vendor name "NEC" in order to support
NEC Lavie X1475JAS notebook (and perhaps more).

The reason of this works with minimal changes is because NEC
Lavie X1475JAS is a Thinkpad inside. ACPI dumps reveals its
OEM ID to be "LENOVO", BIOS version "R2PET30W" matches typical
Lenovo BIOS version, the existence of HKEY of LEN0268, with DMI
fw string is "R2PHT24W".

I compiled and tested with my own machine, attached the dmesg
below as proof of work:
[    6.288932] thinkpad_acpi: ThinkPad ACPI Extras v0.26
[    6.288937] thinkpad_acpi: http://ibm-acpi.sf.net/
[    6.288938] thinkpad_acpi: ThinkPad BIOS R2PET30W (1.11 ), EC R2PHT24W
[    6.307000] thinkpad_acpi: radio switch found; radios are enabled
[    6.307030] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver
[    6.307033] thinkpad_acpi: Disabling thinkpad-acpi brightness events by default...
[    6.320322] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked
[    6.371963] thinkpad_acpi: secondary fan control detected & enabled
[    6.391922] thinkpad_acpi: battery 1 registered (start 0, stop 85, behaviours: 0x7)
[    6.398375] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input13

Signed-off-by: John Chau <johnchau@...las.com>
---
 drivers/platform/x86/thinkpad_acpi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 5790095c175e..92b21e49faf6 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -11478,6 +11478,8 @@ static int __must_check __init get_thinkpad_model_data(
 		tp->vendor = PCI_VENDOR_ID_IBM;
 	else if (dmi_name_in_vendors("LENOVO"))
 		tp->vendor = PCI_VENDOR_ID_LENOVO;
+	else if (dmi_name_in_vendors("NEC"))
+		tp->vendor = PCI_VENDOR_ID_LENOVO;
 	else
 		return 0;

-- 
2.43.0