linux-toradex.git/drivers/acpi/reboot.c, branch v2.6.32-rc3 Linux kernel for Apalis and Colibri modules ACPI: reboot.c: use new acpi_reset interface 2008-12-31T06:15:00+00:00 Lin Ming ming.m.lin@intel.com 2008-12-16T08:40:31+00:00 2ee62612485f888b731804ca1b3b18ed8e842b51 Use new acpi_reset interface to write to reset register Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> 
Use new acpi_reset interface to write to reset register

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPICA: New: acpi_read and acpi_write public interfaces 2008-12-31T06:12:56+00:00 Bob Moore robert.moore@intel.com 2008-12-30T18:55:32+00:00 ecfbbc7b46f74ca48b9f42132739114c9e70f8e4 Changed the acpi_hw_low_level_read and acpi_hw_low_level_write functions to the public acpi_read and acpi_write to allow direct access to ACPI registers. Removed the "width" parameter since the width can be obtained from the input GAS structure. Updated the FADT initialization to setup the GAS structures with the proper widths. Some widths are still hardcoded because many FADTs have incorrect register lengths. Signed-off-by: Bob Moore <robert.moore@intel.com Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> 
Changed the acpi_hw_low_level_read and acpi_hw_low_level_write functions to
the public acpi_read and acpi_write to allow direct access to
ACPI registers.  Removed the "width" parameter since the width
can be obtained from the input GAS structure. Updated the FADT
initialization to setup the GAS structures with the proper
widths. Some widths are still hardcoded because many FADTs have
incorrect register lengths.

Signed-off-by: Bob Moore <robert.moore@intel.com
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Revert "ACPI: Ingore the RESET_REG_SUP bit when using ACPI reset mechanism" 2008-11-07T01:51:59+00:00 Len Brown len.brown@intel.com 2008-11-07T01:51:59+00:00 d17cb18a07c587b8f9ff174a1bf6d03413eabe64 This reverts commit 8fd145917fb62368a9b80db59562c20576238f5a. http://bugzilla.kernel.org/show_bug.cgi?id=11942 Signed-off-by: Len Brown <len.brown@intel.com> 
This reverts commit 8fd145917fb62368a9b80db59562c20576238f5a.

http://bugzilla.kernel.org/show_bug.cgi?id=11942

Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: Ingore the RESET_REG_SUP bit when using ACPI reset mechanism 2008-10-18T05:01:12+00:00 Zhao Yakui yakui.zhao@intel.com 2008-10-17T18:22:27+00:00 8fd145917fb62368a9b80db59562c20576238f5a According to ACPI 3.0, FADT.flags.RESET_REG_SUP indicates whether the ACPI reboot mechanism is supported. However, some boxes have this bit clear, have a valid ACPI_RESET_REG & RESET_VALUE, and ACPI reboot is the only mechanism that works for them after S3. This suggests that other operating systems may not be checking the RESET_REG_SUP bit, and are using other means to decide whether to use the ACPI reboot mechanism or not. Here we stop checking RESET_REG_SUP. Instead, When acpi reboot is requested, only the reset_register is checked. If the following conditions are met, it indicates that the reset register is supported. a. reset_register is not zero b. the access width is eight c. the bit_offset is zero http://bugzilla.kernel.org/show_bug.cgi?id=7299 http://bugzilla.kernel.org/show_bug.cgi?id=1148 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> 
According to ACPI 3.0, FADT.flags.RESET_REG_SUP indicates
whether the ACPI reboot mechanism is supported.

However, some boxes have this bit clear, have a valid
ACPI_RESET_REG & RESET_VALUE, and ACPI reboot is the only
mechanism that works for them after S3.

This suggests that other operating systems may not be checking
the RESET_REG_SUP bit, and are using other means to decide
whether to use the ACPI reboot mechanism or not.

Here we stop checking RESET_REG_SUP.
Instead, When acpi reboot is requested,
only the reset_register is checked. If the following
conditions are met, it indicates that the reset register is supported.
	a. reset_register is not zero
	b. the access width is eight
	c. the bit_offset is zero

http://bugzilla.kernel.org/show_bug.cgi?id=7299
http://bugzilla.kernel.org/show_bug.cgi?id=1148

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Add the ability to reset the machine using the RESET_REG in ACPI's FADT table. 2008-07-16T21:27:08+00:00 Aaron Durbin adurbin@google.com 2008-07-16T21:27:08+00:00 4d3870431d17346c4fdd80e087b7d76f1b5941d5 Signed-off-by: Aaron Durbin <adurbin@google.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Len Brown <lenb@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 
Signed-off-by: Aaron Durbin <adurbin@google.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>