From: Bjorn Helgaas Date: Mon, 30 Mar 2009 17:48:13 +0000 (+0000) Subject: ACPI: support acpi_device_ops .notify methods X-Git-Tag: v2.6.30-rc1~199^2~2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=46ec8598fde74ba59703575c22a6fb0b6b151bb6;p=pandora-kernel.git ACPI: support acpi_device_ops .notify methods This patch adds support for ACPI device driver .notify() methods. If such a method is present, Linux/ACPI installs a handler for device notifications (but not for system notifications such as Bus Check, Device Check, etc). When a device notification occurs, Linux/ACPI passes it on to the driver's .notify() method. In most cases, this removes the need for drivers to install their own handlers for device-specific notifications. For fixed hardware devices like some power and sleep buttons, there's no notification value because there's no control method to execute a Notify opcode. When a fixed hardware device generates an event, we handle it the same as a regular device notification, except we send a ACPI_FIXED_HARDWARE_EVENT value. This is outside the normal 0x0-0xff range used by Notify opcodes. Several drivers install their own handlers for system Bus Check and Device Check notifications so they can support hot-plug. This patch doesn't affect that usage. Signed-off-by: Bjorn Helgaas Reviewed-by: Alex Chiang Signed-off-by: Len Brown --- Reading git-diff-tree failed