diff options
Diffstat (limited to 'arch/arm/boot/dts/armada-xp-gp.dts')
| -rw-r--r-- | arch/arm/boot/dts/armada-xp-gp.dts | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/arch/arm/boot/dts/armada-xp-gp.dts b/arch/arm/boot/dts/armada-xp-gp.dts index 274e2ad5f51c..61bda687f782 100644 --- a/arch/arm/boot/dts/armada-xp-gp.dts +++ b/arch/arm/boot/dts/armada-xp-gp.dts @@ -2,7 +2,7 @@ * Device Tree file for Marvell Armada XP development board * (DB-MV784MP-GP) * - * Copyright (C) 2013 Marvell + * Copyright (C) 2013-2014 Marvell * * Lior Amsalem <alior@marvell.com> * Gregory CLEMENT <gregory.clement@free-electrons.com> @@ -11,6 +11,15 @@ * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. + * + * Note: this Device Tree assumes that the bootloader has remapped the + * internal registers to 0xf1000000 (instead of the default + * 0xd0000000). The 0xf1000000 is the default used by the recent, + * DT-capable, U-Boot bootloaders provided by Marvell. Some earlier + * boards were delivered with an older version of the bootloader that + * left internal registers mapped at 0xd0000000. If you are in this + * situation, you should either update your bootloader (preferred + * solution) or the below Device Tree should be adjusted. */ /dts-v1/; @@ -30,16 +39,17 @@ * 8 GB of plug-in RAM modules by default.The amount * of memory available can be changed by the * bootloader according the size of the module - * actually plugged. Only 7GB are usable because - * addresses from 0xC0000000 to 0xffffffff are used by - * the internal registers of the SoC. + * actually plugged. However, memory between + * 0xF0000000 to 0xFFFFFFFF cannot be used, as it is + * the address range used for I/O (internal registers, + * MBus windows). */ - reg = <0x00000000 0x00000000 0x00000000 0xC0000000>, + reg = <0x00000000 0x00000000 0x00000000 0xf0000000>, <0x00000001 0x00000000 0x00000001 0x00000000>; }; soc { - ranges = <MBUS_ID(0xf0, 0x01) 0 0 0xd0000000 0x100000 + ranges = <MBUS_ID(0xf0, 0x01) 0 0 0xf1000000 0x100000 MBUS_ID(0x01, 0x1d) 0 0 0xfff00000 0x100000 MBUS_ID(0x01, 0x2f) 0 0 0xf0000000 0x1000000>; |