feat(sbsa): helper api for refreshing watchdog timer
This patch adds a helper API to explicitly refresh SBSA secure watchdog
timer. Please refer section A.3 of the following spec:
https://developer.arm.com/documentation/den0029/latest/
Change-Id: I2d0943792aea0092bee1e51d74b908348587e66b
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
diff --git a/drivers/arm/sbsa/sbsa.c b/drivers/arm/sbsa/sbsa.c
index 79c6f26..a88e20c 100644
--- a/drivers/arm/sbsa/sbsa.c
+++ b/drivers/arm/sbsa/sbsa.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2019, ARM Limited. All rights reserved.
+ * Copyright (c) 2019-2023, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -40,3 +40,9 @@
{
mmio_write_32(base + SBSA_WDOG_WCS_OFFSET, (0x0));
}
+
+/* Refresh the secure watchdog timer explicitly */
+void sbsa_wdog_refresh(uintptr_t refresh_base)
+{
+ mmio_write_32(refresh_base + SBSA_WDOG_WRR_OFFSET, SBSA_WDOG_WRR_REFRESH);
+}