platform/x86: thinkpad_acpi: Ignore battery threshold change event notification

If user modifies the battery charge threshold an ACPI event is generated.
Confirmed with Lenovo FW team this is only generated on user event. As no
action is needed, ignore the event and prevent spurious kernel logs.

Reported-by: Derek Barbosa <debarbos@redhat.com>
Closes: https://lore.kernel.org/platform-driver-x86/7e9a1c47-5d9c-4978-af20-3949d53fb5dc@app.fastmail.com/T/#m5f5b9ae31d3fbf30d7d9a9d76c15fb3502dfd903
Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20250517023348.2962591-1-mpearson-lenovo@squebb.ca
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 92b21e49faf62b1a0f03c16b55a2ac6ae5604101..657625dd60a06cb9c7d59e9e6a6a55a1240c36d2 100644 (file)
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -231,6 +231,7 @@ enum tpacpi_hkey_event_t {
        /* Thermal events */
        TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
        TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
+       TP_HKEY_EV_ALARM_BAT_LIM_CHANGE = 0x6013, /* battery charge limit changed*/
        TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
        TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
        TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* windows; thermal table changed */
@@ -3777,6 +3778,10 @@ static bool hotkey_notify_6xxx(const u32 hkey, bool *send_acpi_ev)
                pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
                /* recommended action: immediate sleep/hibernate */
                break;
+       case TP_HKEY_EV_ALARM_BAT_LIM_CHANGE:
+               pr_debug("Battery Info: battery charge threshold changed\n");
+               /* User changed charging threshold. No action needed */
+               return true;
        case TP_HKEY_EV_ALARM_SENSOR_HOT:
                pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
                /* recommended action: warn user through gui, that */