ppc4xx: Remove superfluous dram_init() call or replace it by initdram()

Historically the 405 U-Boot port had a dram_init() call in early init
stage. This function was still called from start.S and most of the time
coded in assembler. This is not needed anymore (since a long time) and
boards should implement the common initdram() function in C instead.

This patch now removed the dram_init() call from start.S and removes the
empty implementations that are scattered through most of the 405 board
ports. Some older board ports really implement this dram_init() though.
These are:

csb272
csb472
ERIC
EXBITGEN
W7OLMC
W7OLMG

I changed those boards to call this assembler dram_init() function now
from their board specific initdram() instead. This *should* work, but please
test again on those platforms. And it is perhaps a good idea that those
boards use some common 405 SDRAM initialization code from cpu/ppc4xx at
some time. So further patches welcome here.

Signed-off-by: Stefan Roese <sr@denx.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/board/eric/eric.c b/board/eric/eric.c
index 5413ae1..14ba9b0 100644
--- a/board/eric/eric.c
+++ b/board/eric/eric.c
@@ -31,6 +31,8 @@
 #define PPC405GP_GPIO0_ODR     0xef600718	/* GPIO Open Drain */
 #define PPC405GP_GPIO0_IR      0xef60071c	/* GPIO Input */
 
+void sdram_init(void);
+
 int board_early_init_f (void)
 {
 
@@ -127,6 +129,12 @@ long int initdram (int board_type)
 	int TotalSize;
 #endif
 
+	/*
+	 * ToDo: Move the asm init routine sdram_init() to this C file,
+	 * or even better use some common ppc4xx code available
+	 * in cpu/ppc4xx
+	 */
+	sdram_init();
 
 #ifdef CONFIG_ERIC
 	/*