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 --- arch/arm/lib/reset.c | 6 ++++++ include/common.h | 1 + 2 files changed, 7 insertions(+)
diff --git a/arch/arm/lib/reset.c b/arch/arm/lib/reset.c index 7a03580..9a95f08 100644 --- a/arch/arm/lib/reset.c +++ b/arch/arm/lib/reset.c @@ -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*/ diff --git a/include/common.h b/include/common.h index 82c0a5a..48e4cbd 100644 --- a/include/common.h +++ b/include/common.h @@ -619,6 +619,7 @@ 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);