On 06/27/2014 11:40 AM, Minkyu Kang wrote:
Dear Przemyslaw Marczak,
On 26/06/14 23:15, Przemyslaw Marczak wrote:
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.marc...@samsung.com>
Cc: Minkyu Kang <mk7.k...@samsung.com>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagn...@jcrosoft.com>
Cc: Albert ARIBAUD <albert.u.b...@aribaud.net>
Cc: Tom Rini <tr...@ti.com>
---
arch/arm/lib/reset.c | 7 +++++++
include/common.h | 1 +
2 files changed, 8 insertions(+)
diff --git a/arch/arm/lib/reset.c b/arch/arm/lib/reset.c
index 7a03580..3b39466 100644
--- a/arch/arm/lib/reset.c
+++ b/arch/arm/lib/reset.c
@@ -23,6 +23,11 @@
#include <common.h>
+void __reset_misc(void) {}
+
+void reset_misc(void)
+ __attribute((weak, alias("__reset_misc")));
+
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
puts ("resetting ...\n");
@@ -30,6 +35,8 @@ 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*/
diff --git a/include/common.h b/include/common.h
index 232136c..04bab78 100644
--- a/include/common.h
+++ b/include/common.h
@@ -629,6 +629,7 @@ 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);
I'm not sure that we really need to add this function to arm common.
We can do this in reset_cpu (arch/arm/cpu/armv7/exynos/soc.c).
But if other SoCs also need to add such things then, it can be added as arm
common.
Thanks,
Minkyu Kang.
No one used this before, so probably better is to move it into exynos
soc.c code.
Thank you,
--
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
p.marc...@samsung.com
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
