linux-kernel - [PATCH 2/8] ideapad: check VPC bit before sync rfkill hw status

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Date:	Wed, 18 Aug 2010 16:37:17 +0800
From:	Ike Panhc <ike.pan@...onical.com>
To:	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Cc:	Thomas Renninger <trenn@...e.de>, Alan Cox <alan@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Corentin Chary <corentincj@...aif.net>,
	David Woodhouse <David.Woodhouse@...el.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Len Brown <len.brown@...el.com>,
	Matthew Garrett <mjg@...hat.com>
Subject: [PATCH 2/8] 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@...onical.com>
---
 drivers/platform/x86/ideapad_acpi.c |   16 +++++++++++++++-
 1 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/drivers/platform/x86/ideapad_acpi.c b/drivers/platform/x86/ideapad_acpi.c
index af630e2..6176597 100644
--- a/drivers/platform/x86/ideapad_acpi.c
+++ b/drivers/platform/x86/ideapad_acpi.c
@@ -381,7 +381,21 @@ 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 = {
-- 
1.7.0.4

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