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authorIra W. Snyder <iws@ovro.caltech.edu>2011-11-21 13:20:32 -0800
committerKumar Gala <galak@kernel.crashing.org>2011-11-29 08:48:06 -0600
commitc18de0d7ae230393bed520cd8656660e1f29c252 (patch)
tree0807b89bc759338ed806f41cc458235220b919d1 /arch/powerpc
parentcc15df57b1ce2fb7b9aac7567b25e7b3bef28458 (diff)
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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/powerpc')
-rw-r--r--arch/powerpc/cpu/mpc85xx/cpu.c17
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