linux-kernel - [PATCH 4.19 014/346] platform/x86: thinkpad_acpi: Add BAT1 is primary battery quirk for Thinkpad Yoga 11e 4th gen

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Message-Id: <20201228124920.457761151@linuxfoundation.org>
Date:   Mon, 28 Dec 2020 13:45:33 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 014/346] platform/x86: thinkpad_acpi: Add BAT1 is primary battery quirk for Thinkpad Yoga 11e 4th gen

From: Hans de Goede <hdegoede@...hat.com>

[ Upstream commit c986a7024916c92a775fc8d853fba3cae1d5fde4 ]

The Thinkpad Yoga 11e 4th gen with the N3450 / Celeron CPU only has
one battery which is named BAT1 instead of the expected BAT0, add a
quirk for this. This fixes not being able to set the charging tresholds
on this model; and this alsoe fixes the following errors in dmesg:

ACPI: \_SB_.PCI0.LPCB.EC__.HKEY: BCTG evaluated but flagged as error
thinkpad_acpi: Error probing battery 2
battery: extension failed to load: ThinkPad Battery Extension
battery: extension unregistered: ThinkPad Battery Extension

Note that the added quirk is for the "R0K" BIOS versions which are
used on the Thinkpad Yoga 11e 4th gen's with a Celeron CPU, there
is a separate "R0L" BIOS for the i3/i5 based versions. This may also
need the same quirk, but if that really is necessary is unknown.

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Link: https://lore.kernel.org/r/20201109103550.16265-1-hdegoede@redhat.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/platform/x86/thinkpad_acpi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 79ac62d8ff7ba..a6e69f2495d23 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -9697,6 +9697,7 @@ static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
 	TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
 	TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
 	TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
+	TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */
 };
 
 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
-- 
2.27.0