ARM: firmware: add prepare_idle() operation

Some firmwares do not put the CPU into idle mode themselves, but still
need to be informed that the CPU is about to enter idle mode before this
happens. Add a prepare_idle() operation to the firmware_ops structure to
handle such cases.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

diff --git a/arch/arm/include/asm/firmware.h b/arch/arm/include/asm/firmware.h
index 15631300c238bbf16cc2c02e2311e774d7c9d95b..2c9f10df7568d5c77010f0cf8e4e08b1bc820082 100644 (file)
--- a/arch/arm/include/asm/firmware.h
+++ b/arch/arm/include/asm/firmware.h
@@ -21,6 +21,10 @@
  * A filled up structure can be registered with register_firmware_ops().
  */
 struct firmware_ops {
+       /*
+        * Inform the firmware we intend to enter CPU idle mode
+        */
+       int (*prepare_idle)(void);
        /*
         * Enters CPU idle mode
         */