From 702e6014f15b307f144fa03ecaf83a8446c6802a Mon Sep 17 00:00:00 2001 From: Wolfgang Denk Date: Sun, 29 Apr 2012 23:57:39 +0000 Subject: doc: cleanup - move board READMEs into respective board directories Also drop a few files referring to no longer / not yet supported boards. Signed-off-by: Wolfgang Denk Cc: Prafulla Wadaskar Cc: Stefan Roese Cc: Kim Phillips Cc: Andy Fleming Cc: Jason Jin Cc: Stefano Babic Cc: Daniel Schwierzeck Acked-by: Stefano Babic Acked-by: Daniel Schwierzeck --- board/icecube/README | 13 +++++++++++++ board/icecube/README.Lite5200B_low_power | 22 ++++++++++++++++++++++ 2 files changed, 35 insertions(+) create mode 100644 board/icecube/README create mode 100644 board/icecube/README.Lite5200B_low_power (limited to 'board/icecube') diff --git a/board/icecube/README b/board/icecube/README new file mode 100644 index 0000000000..5252bc9767 --- /dev/null +++ b/board/icecube/README @@ -0,0 +1,13 @@ +--------------------------------------------------------------------------- +Build target Flash address | BDI "go" command | Reset Vector +--------------------------------------------------------------------------- +Lite5200 0xFFF00000 | 0xFFF00100 | 0xFFF00100 +Lite5200_LOWBOOT 0xFF000000 | 0xFF000100 | 0x00000100 +Lite5200_LOWBOOT08 0xFF800000 | 0xFF800100 | 0x00000100 +icecube_5200 0xFFF00000 | 0xFFF00100 | 0xFFF00100 +icecube_5200_LOWBOOT 0xFF000000 | 0xFF000100 | 0x00000100 +icecube_5200_LOWBOOT08 0xFF800000 | 0xFF800100 | 0x00000100 +icecube_5200_DDR 0xFFF00000 | 0xFFF00100 | 0xFFF00100 +icecube_5200_DDR_LOWBOOT 0xFF800000 | 0xFF800100 | 0x00000100 +icecube_5200_DDR_LOWBOOT08 0xFF800000 | 0xFF800100 | 0x00000100 +--------------------------------------------------------------------------- diff --git a/board/icecube/README.Lite5200B_low_power b/board/icecube/README.Lite5200B_low_power new file mode 100644 index 0000000000..5b04fbba72 --- /dev/null +++ b/board/icecube/README.Lite5200B_low_power @@ -0,0 +1,22 @@ +Lite5200B wakeup from low-power mode (CONFIG_LITE5200B_PM) +---------------------------------------------------------- + +Low-power mode as described in Lite5200B User's Manual, means that +with support of MC68HLC908QT1 microcontroller (refered to as QT), +everything but the SDRAM can be powered down. This brings +maximum power saving, while one can still restore previous state +quickly. + +Quick overview where U-Boot comes into the picture: +- OS saves device states +- OS saves wakeup handler address to physical 0x0, puts SDRAM into + self-refresh and signals to QT, it should power down the board +- / board is sleeping here / +- someone presses SW4 (connected to QT) +- U-Boot checks PSC2_4 pin, if QT drives it down, then we woke up, + so get SDRAM out of self-refresh and transfer control to OS + wakeup handler +- OS restores device states + +This was tested on Linux with USB and Ethernet in use. Adding +support for other devices is an OS issue. -- cgit v1.2.1