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authorLin Ming <ming.m.lin@intel.com>2009-03-18 21:51:01 -0400
committerLen Brown <len.brown@intel.com>2009-03-27 12:11:03 -0400
commitc3dd25f4c1ca84baa170c0a3a15a884f4f06297e (patch)
tree817cc0715dcc8e4d546cee10fce6d2d09553e80f /drivers/acpi/acpica/aclocal.h
parentf9ca058430333c9a24c5ca926aa445125f88df18 (diff)
ACPICA: Clear PM register write-only bits on reading
Affects PM1 Control register only. When reading the register, zero the write-only bits as per the ACPI spec. ACPICA BZ 443. Lin Ming. http://www.acpica.org/bugzilla/show_bug.cgi?id=443 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/aclocal.h')
-rw-r--r--drivers/acpi/acpica/aclocal.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 42ef0cbf70f8..772ee5c4ccca 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -781,6 +781,10 @@ struct acpi_bit_register_info {
781 */ 781 */
782#define ACPI_PM1_STATUS_PRESERVED_BITS 0x0800 /* Bit 11 */ 782#define ACPI_PM1_STATUS_PRESERVED_BITS 0x0800 /* Bit 11 */
783 783
784/* Write-only bits must be zeroed by software */
785
786#define ACPI_PM1_CONTROL_WRITEONLY_BITS 0x2004 /* Bits 13, 2 */
787
784/* For control registers, both ignored and reserved bits must be preserved */ 788/* For control registers, both ignored and reserved bits must be preserved */
785 789
786#define ACPI_PM1_CONTROL_IGNORED_BITS 0x0201 /* Bits 9, 0(SCI_EN) */ 790#define ACPI_PM1_CONTROL_IGNORED_BITS 0x0201 /* Bits 9, 0(SCI_EN) */