ACPI: EC: Some hardware requires burst mode to operate properly
Burst mode temporary (50 ms) locks EC to do only transactions with
driver, without it some hardware returns abstract garbage.
Reference: http://bugzilla.kernel.org/show_bug.cgi?id=9341
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 63862df..445ecba 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -575,6 +575,8 @@
if (bits != 8 && acpi_strict)
return AE_BAD_PARAMETER;
+ acpi_ec_burst_enable(ec);
+
if (function == ACPI_READ) {
result = acpi_ec_read(ec, address, &temp);
*value = temp;
@@ -594,6 +596,8 @@
}
}
+ acpi_ec_burst_disable(ec);
+
switch (result) {
case -EINVAL:
return AE_BAD_PARAMETER;
