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mx5: Mark lowlevel_init board-specific code

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The mx5 lowlevel_init.S contains board-specific code based on the reference
design. Let's keep it since it avoids creating new lowlevel_init files and it
may be used by many boards. But add a config to make it optional in order not to
cause issues on boards not following this part of the reference design.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Matt Sealey <matt@genesi-usa.com>
Acked-by: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Benoît Thébaudeau 2012-11-05 10:07:04 +00:00 committed by Stefano Babic
parent fa88ddb75f
commit 39e8576164
5 changed files with 9 additions and 1 deletions
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2
arch/arm/cpu/armv7/mx5/lowlevel_init.S
View file

@ -396,7 +396,7 @@ ENTRY(lowlevel_init)
mov r10, lr mov r10, lr
mov r4, #0 /* Fix R4 to 0 */ mov r4, #0 /* Fix R4 to 0 */
#if defined(CONFIG_MX51) #if defined(CONFIG_SYS_MAIN_PWR_ON)
ldr r0, =GPIO1_BASE_ADDR ldr r0, =GPIO1_BASE_ADDR
ldr r1, [r0, #0x0] ldr r1, [r0, #0x0]
orr r1, r1, #1 << 23 orr r1, r1, #1 << 23

5
doc/README.imx5
View file

@ -15,3 +15,8 @@ i.MX5x SoCs.
mode), which causes the effect of this failure to be much lower (in terms mode), which causes the effect of this failure to be much lower (in terms
of frequency deviation), avoiding system failure, or at least decreasing of frequency deviation), avoiding system failure, or at least decreasing
the likelihood of system failure. the likelihood of system failure.
1.2 CONFIG_SYS_MAIN_PWR_ON: Trigger MAIN_PWR_ON upon startup.
This option should be enabled for boards having a SYS_ON_OFF_CTL signal
connected to GPIO1[23] and triggering the MAIN_PWR_ON signal like in the
reference designs.

1
include/configs/mx51_efikamx.h
View file

@ -261,5 +261,6 @@
#define CONFIG_SYS_DDR_CLKSEL 0 #define CONFIG_SYS_DDR_CLKSEL 0
#define CONFIG_SYS_CLKTL_CBCDR 0x59E35145 #define CONFIG_SYS_CLKTL_CBCDR 0x59E35145
#define CONFIG_SYS_MAIN_PWR_ON
#endif #endif

1
include/configs/mx51evk.h
View file

@ -235,6 +235,7 @@
#define CONFIG_SYS_DDR_CLKSEL 0 #define CONFIG_SYS_DDR_CLKSEL 0
#define CONFIG_SYS_CLKTL_CBCDR 0x59E35100 #define CONFIG_SYS_CLKTL_CBCDR 0x59E35100
#define CONFIG_SYS_MAIN_PWR_ON
/*----------------------------------------------------------------------- /*-----------------------------------------------------------------------
* FLASH and environment organization * FLASH and environment organization

1
include/configs/vision2.h
View file

@ -196,6 +196,7 @@
/* 166 MHz DDR RAM */ /* 166 MHz DDR RAM */
#define CONFIG_SYS_DDR_CLKSEL 0 #define CONFIG_SYS_DDR_CLKSEL 0
#define CONFIG_SYS_CLKTL_CBCDR 0x19239100 #define CONFIG_SYS_CLKTL_CBCDR 0x19239100
#define CONFIG_SYS_MAIN_PWR_ON
#define CONFIG_SYS_NO_FLASH #define CONFIG_SYS_NO_FLASH