ACPICA: Update to GPIO region handler interface.
authorBob Moore <Robert.Moore@intel.com>
Tue, 23 Sep 2014 02:35:47 +0000 (10:35 +0800)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Wed, 24 Sep 2014 20:53:46 +0000 (22:53 +0200)
commit75ec6e55f1384548311a13ce4fcb39c516053314
tree0165f3ba0f3fe31a1d27d17e4fee1a379df83c40
parent0f33be009b89d2268e94194dc4fd01a7851b6d51
ACPICA: Update to GPIO region handler interface.

Changes to correct several GPIO issues:

1) The update_rule in a GPIO field definition is now ignored;
a read-modify-write operation is never performed for GPIO fields.
(Internally, this means that the field assembly/disassembly
code is completely bypassed for GPIO.)

2) The Address parameter passed to a GPIO region handler is
now the bit offset of the field from a previous Connection()
operator. Thus, it becomes a "Pin Number Index" into the
Connection() resource descriptor.

3) The bit_width parameter passed to a GPIO region handler is
now the exact bit width of the GPIO field. Thus, it can be
interpreted as "number of pins".

Overall, we can now say that the region handler interface
to GPIO handlers is a raw "bit/pin" addressed interface, not
a byte-addressed interface like the system_memory handler interface.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: 3.15+ <stable@vger.kernel.org> # 3.15+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
drivers/acpi/acpica/aclocal.h
drivers/acpi/acpica/acobject.h
drivers/acpi/acpica/dsfield.c
drivers/acpi/acpica/evregion.c
drivers/acpi/acpica/exfield.c
drivers/acpi/acpica/exprep.c