blackfin: Add comments for watchdog event initialization.
- Add comments for watchdog event initialization.
- Make sure the writting operation to MMRs are finished.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
diff --git a/arch/blackfin/cpu/initcode.c b/arch/blackfin/cpu/initcode.c
index 5fc06e1..ffaf101 100644
--- a/arch/blackfin/cpu/initcode.c
+++ b/arch/blackfin/cpu/initcode.c
@@ -458,15 +458,23 @@
if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS) {
serial_putc('e');
#ifdef __ADSPBF60x__
+ /* Reset system event controller */
bfin_write_SEC_GCTL(0x2);
- SSYNC();
- bfin_write_SEC_FCTL(0xc1);
- bfin_write_SEC_SCTL(2, bfin_read_SEC_SCTL(2) | 0x6);
-
bfin_write_SEC_CCTL(0x2);
SSYNC();
+
+ /* Enable fault event input and system reset action in fault
+ * controller. Route watchdog timeout event to fault interface.
+ */
+ bfin_write_SEC_FCTL(0xc1);
+ /* Enable watchdog interrupt source */
+ bfin_write_SEC_SCTL(2, bfin_read_SEC_SCTL(2) | 0x6);
+ SSYNC();
+
+ /* Enable system event controller */
bfin_write_SEC_GCTL(0x1);
bfin_write_SEC_CCTL(0x1);
+ SSYNC();
#endif
bfin_write_WDOG_CTL(WDDIS);
SSYNC();