[ACPI] Enable Embedded Controller (EC) interrupt mode by default

"ec_intr=0" reverts to polling
"ec_burst=" no longer exists.
Signed-off-by: NLen Brown <len.brown@intel.com>
Acked-by: NLuming Yu <luming.yu@intel.com>

Documentation/kernel-parameters.txt

@@ -452,6 +452,11 @@ running once the system is up.
 
 	eata=		[HW,SCSI]
 
+	ec_intr=	[HW,ACPI] ACPI Embedded Controller interrupt mode
+			Format: <int>
+			0: polling mode
+			non-0: interrupt mode (default)
+
 	eda=		[HW,PS2]
 
 	edb=		[HW,PS2]

drivers/acpi/ec.c

@@ -73,7 +73,7 @@ static struct acpi_driver acpi_ec_driver = {
 	.class = ACPI_EC_CLASS,
 	.ids = ACPI_EC_HID,
 	.ops = {
-		.add = acpi_ec_poll_add,
+		.add = acpi_ec_intr_add,
 		.remove = acpi_ec_remove,
 		.start = acpi_ec_start,
 		.stop = acpi_ec_stop,
@@ -147,7 +147,7 @@ static union acpi_ec *ec_ecdt;
 
 /* External interfaces use first EC only, so remember */
 static struct acpi_device *first_ec;
-static int acpi_ec_poll_mode = EC_POLL;
+static int acpi_ec_poll_mode = EC_INTR;
 
 /* --------------------------------------------------------------------------
                              Transaction Management
@@ -1594,4 +1594,4 @@ static int __init acpi_ec_set_intr_mode(char *str)
 	return 0;
 }
 
-__setup("ec_burst=", acpi_ec_set_intr_mode);
+__setup("ec_intr=", acpi_ec_set_intr_mode);