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 ---
Unchanged from v1.
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