ACPI EC: add ec_query function

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Acked-by: Peter Stuge <peter@stuge.se>

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6447 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/src/ec/acpi/ec.c b/src/ec/acpi/ec.c
index 1d4ffb8..2680aa3 100644
--- a/src/ec/acpi/ec.c
+++ b/src/ec/acpi/ec.c
@@ -116,6 +116,12 @@
 	return send_ec_data(data);
 }
 
+u8 ec_query(void)
+{
+	send_ec_command(0x84);
+	return recv_ec_data();
+}
+
 void ec_set_bit(u8 addr, u8 bit)
 {
 	ec_write(addr, ec_read(addr) | (1 << bit));
diff --git a/src/ec/acpi/ec.h b/src/ec/acpi/ec.h
index b5a1197..8fc88d2 100644
--- a/src/ec/acpi/ec.h
+++ b/src/ec/acpi/ec.h
@@ -42,6 +42,7 @@
 int send_ec_data(u8 data);
 int send_ec_data_nowait(u8 data);
 u8 recv_ec_data(void);
+u8 ec_query(void);
 u8 ec_read(u8 addr);
 int ec_write(u8 addr, u8 data);
 void ec_set_bit(u8 addr, u8 bit);