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arm:reset: call the reset_misc() before the cpu reset 

On an Odroid U3 board, the SOC is unable to reset the eMMC card
in the DWMMC mode by the cpu software reset. Manual reset of the card
by switching proper gpio pin - fixes this issue.

Such solution needs to add a call to pre reset function.
This is done by the reset_misc() function, which is called before reset_cpu().
The function reset_misc() is a weak function.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Tom Rini <trini@ti.com>

Changes v4:
- arch/arm/reset: fix weak function attribute to proper style
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
utp
Przemyslaw Marczak 2014-09-01 13:50:48 +02:00 committed by Minkyu Kang
parent 32ee9bc5ed
commit 1fb4dab2a1
2 changed files with 7 additions and 0 deletions
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6
arch/arm/lib/reset.c
View File

@ -23,6 +23,10 @@
#include <common.h>
__weak void reset_misc(void)
{
}
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
puts ("resetting ...\n");
@ -30,6 +34,8 @@ int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
udelay (50000); /* wait 50 ms */
disable_interrupts();
reset_misc();
reset_cpu(0);
/*NOTREACHED*/

1
include/common.h
View File

@ -616,6 +616,7 @@ int checkicache (void);
int checkdcache (void);
void upmconfig (unsigned int, unsigned int *, unsigned int);
ulong get_tbclk (void);
void reset_misc (void);
void reset_cpu (ulong addr);
#if defined (CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
void ft_cpu_setup(void *blob, bd_t *bd);