From: Ike Panhc <ike.pan@canonical.com>
Date: Fri, 1 Oct 2010 07:39:05 +0000 (+0800)
Subject: ideapad: check VPC bit before sync rfkill hw status
X-Git-Tag: v2.6.37-rc1~128^2~17
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8e7d354370f61cbe82a8b4a0f74224aed900b410;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git

ideapad: check VPC bit before sync rfkill hw status

Check VPC bit to make sure the HW rfkill is touched.

Signed-off-by: Ike Panhc <ike.pan@canonical.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
---

diff --git a/drivers/platform/x86/ideapad_acpi.c b/drivers/platform/x86/ideapad_acpi.c
index c87693c..e07d607 100644
--- a/drivers/platform/x86/ideapad_acpi.c
+++ b/drivers/platform/x86/ideapad_acpi.c
@@ -379,7 +379,21 @@ static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
 
 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
 {
-	ideapad_sync_rfk_state(adevice);
+	acpi_handle handle = adevice->handle;
+	unsigned long vpc1, vpc2, vpc_bit;
+
+	if (read_ec_data(handle, 0x10, &vpc1))
+		return;
+	if (read_ec_data(handle, 0x1A, &vpc2))
+		return;
+
+	vpc1 = (vpc2 << 8) | vpc1;
+	for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
+		if (test_bit(vpc_bit, &vpc1)) {
+			if (vpc_bit == 9)
+				ideapad_sync_rfk_state(adevice);
+		}
+	}
 }
 
 static struct acpi_driver ideapad_acpi_driver = {