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| author | Ira W. Snyder <iws@ovro.caltech.edu> | 2011-11-21 13:20:32 -0800 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-11-29 08:48:06 -0600 |
| commit | c18de0d7ae230393bed520cd8656660e1f29c252 (patch) | |
| tree | 0807b89bc759338ed806f41cc458235220b919d1 /arch | |
| parent | cc15df57b1ce2fb7b9aac7567b25e7b3bef28458 (diff) | |
| download | u-boot-imx-c18de0d7ae230393bed520cd8656660e1f29c252.zip u-boot-imx-c18de0d7ae230393bed520cd8656660e1f29c252.tar.gz u-boot-imx-c18de0d7ae230393bed520cd8656660e1f29c252.tar.bz2 | |
mpc85xx: support board-specific reset function
This is useful for boards which cannot be reset in the usual way for the
85xx CPU. An example is a board which can only be reset by a hardware
watchdog.
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cpu.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c index 49c0551..c1815e8 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu.c +++ b/arch/powerpc/cpu/mpc85xx/cpu.c @@ -42,6 +42,16 @@ DECLARE_GLOBAL_DATA_PTR; +/* + * Default board reset function + */ +static void +__board_reset(void) +{ + /* Do nothing */ +} +void board_reset(void) __attribute__((weak, alias("__board_reset"))); + int checkcpu (void) { sys_info_t sysinfo; @@ -215,7 +225,12 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) mtspr(DBCR0,val); #else volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); - out_be32(&gur->rstcr, 0x2); /* HRESET_REQ */ + + /* Attempt board-specific reset */ + board_reset(); + + /* Next try asserting HRESET_REQ */ + out_be32(&gur->rstcr, 0x2); udelay(100); #endif |