summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorThomas Weißschuh <linux@weissschuh.net>2021-12-22 22:20:14 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-01-27 09:19:45 +0100
commitba72fa2cb2f233dd7864e4c931906e37fd1e752f (patch)
tree669143a90924179ac7d9ea2852edb56e90138744
parent7c366d75a44ad81be92793eb2886724179396f06 (diff)
ACPI: battery: Add the ThinkPad "Not Charging" quirk
[ Upstream commit e96c1197aca628f7d2480a1cc3214912b40b3414 ] The EC/ACPI firmware on Lenovo ThinkPads used to report a status of "Unknown" when the battery is between the charge start and charge stop thresholds. On Windows, it reports "Not Charging" so the quirk has been added to also report correctly. Now the "status" attribute returns "Not Charging" when the battery on ThinkPads is not physicaly charging. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r--drivers/acpi/battery.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 6e96ed68b337..4e0aea5f008e 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -65,6 +65,7 @@ static int battery_bix_broken_package;
static int battery_notification_delay_ms;
static int battery_ac_is_broken;
static int battery_check_pmic = 1;
+static int battery_quirk_notcharging;
static unsigned int cache_time = 1000;
module_param(cache_time, uint, 0644);
MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
@@ -233,6 +234,8 @@ static int acpi_battery_get_property(struct power_supply *psy,
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else if (acpi_battery_is_charged(battery))
val->intval = POWER_SUPPLY_STATUS_FULL;
+ else if (battery_quirk_notcharging)
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
break;
@@ -1337,6 +1340,12 @@ battery_do_not_check_pmic_quirk(const struct dmi_system_id *d)
return 0;
}
+static int __init battery_quirk_not_charging(const struct dmi_system_id *d)
+{
+ battery_quirk_notcharging = 1;
+ return 0;
+}
+
static const struct dmi_system_id bat_dmi_table[] __initconst = {
{
/* NEC LZ750/LS */
@@ -1381,6 +1390,19 @@ static const struct dmi_system_id bat_dmi_table[] __initconst = {
DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
},
},
+ {
+ /*
+ * On Lenovo ThinkPads the BIOS specification defines
+ * a state when the bits for charging and discharging
+ * are both set to 0. That state is "Not Charging".
+ */
+ .callback = battery_quirk_not_charging,
+ .ident = "Lenovo ThinkPad",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad"),
+ },
+ },
{},
};