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authorAlexey Starikovskiy <astarikovskiy@suse.de>2010-03-17 13:14:13 -0400
committerLen Brown <len.brown@intel.com>2010-03-17 13:14:13 -0400
commitdadf28a10c3eb29421837a2e413ab869ebd9e168 (patch)
treef4ea66f2ceb12935e3b2c1d3889102dee0dfa778 /drivers/acpi/acpica
parenta3d3203e4bb40f253b1541e310dc0f9305be7c84 (diff)
ACPI: EC: Allow multibyte access to EC
http://bugzilla.kernel.org/show_bug.cgi?id=14667 Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica')
-rw-r--r--drivers/acpi/acpica/exprep.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/exprep.c b/drivers/acpi/acpica/exprep.c
index edf62bf5b266..a610ebe18edd 100644
--- a/drivers/acpi/acpica/exprep.c
+++ b/drivers/acpi/acpica/exprep.c
@@ -468,6 +468,18 @@ acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info)
acpi_ut_add_reference(obj_desc->field.region_obj);
+ /* allow full data read from EC address space */
+ if (obj_desc->field.region_obj->region.space_id ==
+ ACPI_ADR_SPACE_EC) {
+ if (obj_desc->common_field.bit_length > 8)
+ obj_desc->common_field.access_bit_width =
+ ACPI_ROUND_UP(obj_desc->common_field.
+ bit_length, 8);
+ obj_desc->common_field.access_byte_width =
+ ACPI_DIV_8(obj_desc->common_field.
+ access_bit_width);
+ }
+
ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
"RegionField: BitOff %X, Off %X, Gran %X, Region %p\n",
obj_desc->field.start_field_bit_offset,