commit 4c3de56b2ac357f9f85aae919ab7972749f615df
author Madhukar Pappireddy <madhukar.pappireddy@arm.com> Wed Mar 22 15:27:22 2023 -0500
committer Madhukar Pappireddy <madhukar.pappireddy@arm.com> Thu May 04 08:24:12 2023 -0500
tree 7eb9c1c80ab85cdcd3dc1318f798fed2aaec24f5
parent c465d7b5a9830257a52fde0a70d6c4d151a49a7b

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>

include/drivers/arm/sbsa.h

diff --git a/include/drivers/arm/sbsa.h b/include/drivers/arm/sbsa.h
index 9403634..4ca7194 100644
--- a/include/drivers/arm/sbsa.h
+++ b/include/drivers/arm/sbsa.h
@@ -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
  */
@@ -9,7 +9,12 @@
 
 #include <stdint.h>
 
-/* Register Offsets */
+/* SBSA Secure Watchdog Register Offsets */
+/* Refresh frame */
+#define SBSA_WDOG_WRR_OFFSET		UL(0x000)
+#define SBSA_WDOG_WRR_REFRESH		UL(0x1)
+
+/* Control and status frame */
 #define SBSA_WDOG_WCS_OFFSET		UL(0x000)
 #define SBSA_WDOG_WOR_LOW_OFFSET	UL(0x008)
 #define SBSA_WDOG_WOR_HIGH_OFFSET	UL(0x00C)
@@ -20,5 +25,6 @@
 
 void sbsa_wdog_start(uintptr_t base, uint64_t ms);
 void sbsa_wdog_stop(uintptr_t base);
+void sbsa_wdog_refresh(uintptr_t refresh_base);
 
 #endif /* SBSA_H */