[U-Boot] [PATCH 1/2] arm:am33xx: Make dram_init call sdram_init() in some contexts
Tom Rini
trini at ti.com
Wed May 21 18:57:21 CEST 2014
We have two contexts for booting these platforms. One is SPL which is
roughly: reset, cpu_init_crit, lowlevel_init, s_init, sdram_init, _main,
board_init_f from SPL, ... then U-Boot loads. The other is a
memory-mapped XIP case (NOR or QSPI) where we do not run an SPL. In
this case we go, roughly: reset, cpu_init_crit, lowlevel_init, s_init,
_main, regular board_init_f.
In the first case s_init will set a valid gd and then be able to call
sdram_init which in many cases will need i2c (which needs a valid gd for
gd->cur_i2c_bus). In this second case we must (and are able to and
should) defer sdram_init() into dram_init() called by board_init_f as gd
will have been set in _main and cleared in board_init_f.
Signed-off-by: Tom Rini <trini at ti.com>
---
arch/arm/cpu/armv7/am33xx/board.c | 2 ++
arch/arm/cpu/armv7/am33xx/emif4.c | 4 ++++
2 files changed, 6 insertions(+)
diff --git a/arch/arm/cpu/armv7/am33xx/board.c b/arch/arm/cpu/armv7/am33xx/board.c
index e5c922a..9a69b6c 100644
--- a/arch/arm/cpu/armv7/am33xx/board.c
+++ b/arch/arm/cpu/armv7/am33xx/board.c
@@ -238,7 +238,9 @@ void s_init(void)
/* Enable RTC32K clock */
rtc32k_enable();
#endif
+#ifdef CONFIG_SPL_BUILD
sdram_init();
+#endif
}
#endif
diff --git a/arch/arm/cpu/armv7/am33xx/emif4.c b/arch/arm/cpu/armv7/am33xx/emif4.c
index 2c67c32..a7a3e88 100644
--- a/arch/arm/cpu/armv7/am33xx/emif4.c
+++ b/arch/arm/cpu/armv7/am33xx/emif4.c
@@ -21,6 +21,10 @@ DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
{
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
+ sdram_init();
+#endif
+
/* dram_init must store complete ramsize in gd->ram_size */
gd->ram_size = get_ram_size(
(void *)CONFIG_SYS_SDRAM_BASE,
--
1.7.9.5
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