acer-wmi: support Lenovo ideapad S205 wifi switch

The AMW0 function in acer-wmi works on Lenovo ideapad S205 for control
the wifi hardware state. We also found there have a 0x78 EC register
exposes the state of wifi hardware switch on the machine.

So, add this patch to support Lenovo ideapad S205 wifi hardware switch
in acer-wmi driver.

Reference: bko#37892
	https://bugzilla.kernel.org/show_bug.cgi?id=37892

Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Thomas Renninger <trenn@suse.de>
Tested-by: Florian Heyer <heyho@flanto.de>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 26 insertions, 2 deletions

diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index fa7153020ca1..af2bb20cb2fb 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -305,6 +305,10 @@ static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
         .wireless = 2,
 };
 
+static struct quirk_entry quirk_lenovo_ideapad_s205 = {
+        .wireless = 3,
+};
+
 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 static struct dmi_system_id __devinitdata acer_blacklist[] = {
         {
@@ -451,6 +455,15 @@ static struct dmi_system_id acer_quirks[] = {
                 },
                 .driver_data = &quirk_medion_md_98300,
         },
+        {
+                .callback = dmi_matched,
+                .ident = "Lenovo Ideapad S205",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "10382LG"),
+                },
+                .driver_data = &quirk_lenovo_ideapad_s205,
+        },
         {}
 };
 
@@ -543,6 +556,12 @@ struct wmi_interface *iface)
                                 return AE_ERROR;
                         *value = result & 0x1;
                         return AE_OK;
+                case 3:
+                        err = ec_read(0x78, &result);
+                        if (err)
+                                return AE_ERROR;
+                        *value = result & 0x1;
+                        return AE_OK;
                 default:
                         err = ec_read(0xA, &result);
                         if (err)
@@ -1267,8 +1286,13 @@ static void acer_rfkill_update(struct work_struct *ignored)
         acpi_status status;
 
         status = get_u32(&state, ACER_CAP_WIRELESS);
-        if (ACPI_SUCCESS(status))
-                rfkill_set_sw_state(wireless_rfkill, !state);
+        if (ACPI_SUCCESS(status)) {
+                if (quirks->wireless == 3) {
+                        rfkill_set_hw_state(wireless_rfkill, !state);
+                } else {
+                        rfkill_set_sw_state(wireless_rfkill, !state);
+                }
+        }
 
         if (has_cap(ACER_CAP_BLUETOOTH)) {
                 status = get_u32(&state, ACER_CAP_BLUETOOTH);