From: Stephen Warren <swarren@wwwdotorg.org>
Date: Thu, 27 Dec 2012 21:29:05 +0000 (-0700)
Subject: ARM: bcm2835 rpi: remove hard-coded memreserve from DT
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6520700fdb2cc07ed86e893a2e88c491e04d6b75;p=linux-beck.git

ARM: bcm2835 rpi: remove hard-coded memreserve from DT

The Raspberry Pi has either 256MB or 512MB of RAM. However, a portion is
reserved for use by the VideoCore co-processor. The RPi DT contained a
/memreserve/ statement to reserve that RAM. However, the exact amount of
RAM used by the VideoCore is dynamic at boot-time; a firmware config
file specifies the amount. As such, we can't hard-code the size in the
DT. Remove the /memreserve/ statement. The bootloader is expected to
adjust the /memory properties to reflect the RAM size the ARM CPU can
use. Upstream U-Boot certainly does this, although I'm not sure that the
basic firmware does if it boots the kernel directly; users may need to
manually adjust their DT if not using U-Boot.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
---

diff --git a/arch/arm/boot/dts/bcm2835-rpi-b.dts b/arch/arm/boot/dts/bcm2835-rpi-b.dts
index 9b72054a0bc0..6ff26f99cacd 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-b.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-b.dts
@@ -1,5 +1,4 @@
 /dts-v1/;
-/memreserve/ 0x0c000000 0x04000000;
 /include/ "bcm2835.dtsi"
 
 / {