platform/x86: asus-wmi: Add quirk wmi_ignore_fan

[ Upstream commit c874b6de4cdfa2822a07b479887cd5f87fb5d078 ]

Some laptops have a fan device listed in their ACPI tables but do not
actually contain a fan.
Introduce a quirk that can be used to override the fan detection logic.

This was observed with a ASUS VivoBook E410MA running firmware
E410MAB.304.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20221221-asus-fan-v1-1-e07f3949725b@weissschuh.net
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index f051b21..8e317d5 100644 (file)
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -2243,7 +2243,9 @@ static int asus_wmi_fan_init(struct asus_wmi *asus)
        asus->fan_type = FAN_TYPE_NONE;
        asus->agfn_pwm = -1;
 
-       if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_CPU_FAN_CTRL))
+       if (asus->driver->quirks->wmi_ignore_fan)
+               asus->fan_type = FAN_TYPE_NONE;
+       else if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_CPU_FAN_CTRL))
                asus->fan_type = FAN_TYPE_SPEC83;
        else if (asus_wmi_has_agfn_fan(asus))
                asus->fan_type = FAN_TYPE_AGFN;

diff --git a/drivers/platform/x86/asus-wmi.h b/drivers/platform/x86/asus-wmi.h
index 6531699..a478ebf 100644 (file)
--- a/drivers/platform/x86/asus-wmi.h
+++ b/drivers/platform/x86/asus-wmi.h
@@ -38,6 +38,7 @@ struct quirk_entry {
        bool store_backlight_power;
        bool wmi_backlight_set_devstate;
        bool wmi_force_als_set;
+       bool wmi_ignore_fan;
        enum asus_wmi_tablet_switch_mode tablet_switch_mode;
        int wapf;
        /*