ACPI / x86: Introduce an acpi_quirk_skip_acpi_ac_and_battery() helper

Some x86 ACPI boards have broken AC and battery ACPI devices in their ACPI
tables. This is often tied to these devices using certain PMICs where the
factory OS image seems to be using native charger and fuel-gauge drivers
instead.

So far both the AC and battery drivers have almost identical checks for
these PMICs including both of them having a DMI based mechanism to force
usage of the ACPI AC and battery drivers on some boards even though one
of these PMICs is present, with the same 2 boards listed in both driver's
DMI tables for this.

The only difference is that the AC driver checks for 2 PMICs and the
battery driver only for one. This has grown this way because the other
(Whiskey Cove) PMIC is only used on a few boards (3 known boards) and
although some of these do have non working ACPI battery devices, their
_STA method always returns 0, but that really should not be relied on.

This patch factors out the shared checks into a new
acpi_quirk_skip_acpi_ac_and_battery() helper and moves the AC and
battery drivers over to this new helper.

Note the DMI table is shared with acpi_quirk_skip_i2c_client_enumeration()
and acpi_quirk_skip_serdev_enumeration(), because boards needing DMI quirks
for either of these typically also have broken AC and battery ACPI devices.

The ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY quirk is not set yet on boards
already in this DMI table, to avoid introducing any functional changes
in this refactoring patch.

Besided sharing the code between the AC and battery drivers this
refactoring also moves this quirk handling to under #ifdef CONFIG_X86,
removing this x86 specific code from non x86 ACPI builds.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 39 deletions

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 8afa85d6eb6a..bf4b7f0b627a 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -52,7 +52,6 @@ static bool battery_driver_registered;
 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 unsigned int cache_time = 1000;
 module_param(cache_time, uint, 0644);
 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
@@ -64,11 +63,6 @@ static const struct acpi_device_id battery_device_ids[] = {
 
 MODULE_DEVICE_TABLE(acpi, battery_device_ids);
 
-/* Lists of PMIC ACPI HIDs with an (often better) native battery driver */
-static const char * const acpi_battery_blacklist[] = {
-	"INT33F4", /* X-Powers AXP288 PMIC */
-};
-
 enum {
 	ACPI_BATTERY_ALARM_PRESENT,
 	ACPI_BATTERY_XINFO_PRESENT,
@@ -1104,13 +1098,6 @@ battery_ac_is_broken_quirk(const struct dmi_system_id *d)
 	return 0;
 }
 
-static int __init
-battery_do_not_check_pmic_quirk(const struct dmi_system_id *d)
-{
-	battery_check_pmic = 0;
-	return 0;
-}
-
 static const struct dmi_system_id bat_dmi_table[] __initconst = {
 	{
 		/* NEC LZ750/LS */
@@ -1139,22 +1126,6 @@ static const struct dmi_system_id bat_dmi_table[] __initconst = {
 			DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"),
 		},
 	},
-	{
-		/* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */
-		.callback = battery_do_not_check_pmic_quirk,
-		.matches = {
-			DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
-		},
-	},
-	{
-		/* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */
-		.callback = battery_do_not_check_pmic_quirk,
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "80XF"),
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
-		},
-	},
 	{},
 };
 
@@ -1279,19 +1250,12 @@ static struct acpi_driver acpi_battery_driver = {
 
 static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
 {
-	unsigned int i;
 	int result;
 
-	dmi_check_system(bat_dmi_table);
+	if (acpi_quirk_skip_acpi_ac_and_battery())
+		return;
 
-	if (battery_check_pmic) {
-		for (i = 0; i < ARRAY_SIZE(acpi_battery_blacklist); i++)
-			if (acpi_dev_present(acpi_battery_blacklist[i], "1", -1)) {
-				pr_info("found native %s PMIC, not loading\n",
-					acpi_battery_blacklist[i]);
-				return;
-			}
-	}
+	dmi_check_system(bat_dmi_table);
 
 	result = acpi_bus_register_driver(&acpi_battery_driver);
 	battery_driver_registered = (result == 0);