Merge flatcap.org:/home/flatcap/backup/bk/ntfs-2.6

into flatcap.org:/home/flatcap/backup/bk/ntfs-2.6-devel

1 files changed, 21 insertions, 3 deletions

diff --git a/Documentation/arm/Samsung-S3C24XX/Suspend.txt b/Documentation/arm/Samsung-S3C24XX/Suspend.txt
index 59d4bad5b43ecc..9966156c2d5005 100644
--- a/Documentation/arm/Samsung-S3C24XX/Suspend.txt
+++ b/Documentation/arm/Samsung-S3C24XX/Suspend.txt
@@ -33,7 +33,8 @@ Resuming
   code to resume Linux operation.
 
   GSTATUS4 is currently left alone by the sleep code, and is free to
-  use for any other purposes.
+  use for any other purposes (for example, the EB2410ITX uses this to
+  save memory configuration in).
 
 
 Machine Support
@@ -41,9 +42,9 @@ Machine Support
 
   The machine specific functions must call the s3c2410_pm_init() function
   to say that it's bootloader is capable of resuming. This can be as
-  simple as adding the following to the file:
+  simple as adding the following to the machine's definition:
 
-  late_initcall(s3c2410_pm_init);
+  INITMACHINE(s3c2410_pm_init)
 
   A board can do its own setup before calling s3c2410_pm_init, if it
   needs to setup anything else for power management support.
@@ -52,6 +53,23 @@ Machine Support
   saving the resume address, if your board requires it, then contact
   the maintainer and discuss what is required.
 
+  Note, the origianal method of adding an late_initcall() is wrong,
+  and will end up initialising all compiled machine's pm init!
+
+
+Debugging
+---------
+
+  There are several important things to rember when using PM suspend:
+
+  1) The uart drivers will disable the clocks to the UART blocks when
+     suspending, which means that use of printascii() or similar direct
+     access to the UARTs will cause the debug to stop.
+
+  2) Whilst the pm code itself will attempt to re-enabled the UART clocks,
+     care should be taken that any external clock sources that the UARTs
+     rely on are still enabled at that point
+
 
 Configuration
 -------------