u-boot/arch
Egli, Samuel 69b918b65d am33xx,ddr3: fix ddr3 sdram configuration
This patch fixes the DDR3 initialization procedure in
order to comply with DDR3 standard. A 500 us delay is specified
between the DDR3 reset and clock enable signal. Until now,
this delay was not respected. Some DDR3 chips don't bother
but the bigger the RAM becomes the more likely it seems that
this delay is needed. We observed that DRAM > 256 MB from
the manufacturer Samsung have an issue when the specification
is not respected.

Changes:

1) Add a 1 ms wait for L3 timeout error trigger

2) Don't delay DDR3 initialization
Bit 31 of emif_sdram_ref_ctrl shouldn't be set because his
suppresses the initialization of DDR3

Signed-off-by: Samuel Egli <samuel.egli@siemens.com>
Reviewed-by: James Doublesin <doublesin@ti.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Roger Meier <r.meier@siemens.com>
Cc: Heiko Schocher <hs@denx.de>
2015-12-12 15:56:09 -05:00
..
arc axs10x: add support of generic EHCI USB 2.0 controller 2015-12-08 17:29:56 +03:00
arm am33xx,ddr3: fix ddr3 sdram configuration 2015-12-12 15:56:09 -05:00
avr32 avr32: Use the generic bitops headers 2015-11-05 10:52:31 -05:00
blackfin Move console definitions into a new console.h file 2015-11-19 20:27:50 -07:00
m68k Replace "extern inline" with "static inline" 2015-11-09 18:19:40 -05:00
microblaze microblaze: Fix C99/gnu99 compatiblity for inline functions 2015-11-19 13:09:41 +01:00
mips Merge branch 'master' of git://git.denx.de/u-boot-mips 2015-11-06 09:17:17 -05:00
nds32 nds32: Use the generic bitops headers 2015-11-05 10:52:21 -05:00
nios2 nios2: 10m50: change to ns16550 uart 2015-11-21 21:50:18 -05:00
openrisc openrisc: updating build tools naming convention 2015-11-12 18:13:20 -05:00
powerpc PPC4xx: Create "liebherr" vendor directory 2015-11-30 12:50:29 +01:00
sandbox timer: sandbox: Use device tree to pass the clock frequency 2015-12-01 06:23:51 -07:00
sh Move console definitions into a new console.h file 2015-11-19 20:27:50 -07:00
sparc sparc: Remove non-generic board init files: board.c, time.c 2015-12-03 13:15:50 +02:00
x86 x86: Remove HAVE_ACPI_RESUME 2015-12-09 17:44:56 +08:00
.gitignore .gitignore: drop include/asm/proc from ignore pattern 2014-06-19 11:18:54 -04:00
Kconfig sparc: Initial ground work for generic board initialization 2015-12-03 13:15:48 +02:00