[edk2-platforms PATCH 6/6] Marvell: RealTimeClockLib: Rework LibGetWakeupTime/LibSetWakeupTime

["Marcin Wojtas" <mw@semihalf.com>]

Apply multiple fixes to the Marvell RealTimeClockLib wakeup
library callbacks.

LibGetWakeupTime:
* Add input parameters validation
* Fix 'Pending' value check

LibSetWakeupTime:
* Allow disabling the wakeup timer regardless the input 'Time' value
* Use more generic 'Time' value verification, which is more strict
  than the replaced custom one.
* Use proper alarm mask for 'Pending' signalling

With above the ACS3.0 FWTS and SCT timer tests pass cleanly.

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
 Silicon/Marvell/Armada7k8k/Library/RealTimeClockLib/RealTimeClockLib.h |  2 +-
 Silicon/Marvell/Armada7k8k/Library/RealTimeClockLib/RealTimeClockLib.c | 29 ++++++++++----------
 2 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/Silicon/Marvell/Armada7k8k/Library/RealTimeClockLib/RealTimeClockLib.h b/Silicon/Marvell/Armada7k8k/Library/RealTimeClockLib/RealTimeClockLib.h
index 7fa1d092e4..c33e63d107 100644
--- a/Silicon/Marvell/Armada7k8k/Library/RealTimeClockLib/RealTimeClockLib.h
+++ b/Silicon/Marvell/Armada7k8k/Library/RealTimeClockLib/RealTimeClockLib.h
@@ -17,7 +17,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #define RTC_BRIDGE_TIMING_CTRL0_REG_OFFS        0x80
 #define RTC_BRIDGE_TIMING_CTRL1_REG_OFFS        0x84
 #define RTC_IRQ_STATUS_REG                      0x90
-#define RTC_IRQ_ALARM_MASK                      0x1
+#define RTC_IRQ_ALARM_MASK                      0x2
 #define RTC_WRITE_PERIOD_DELAY_MASK             0xFFFF
 #define RTC_WRITE_PERIOD_DELAY_DEFAULT          0x3FF
 #define RTC_WRITE_SETUP_DELAY_MASK              (0xFFFF << 16)
diff --git a/Silicon/Marvell/Armada7k8k/Library/RealTimeClockLib/RealTimeClockLib.c b/Silicon/Marvell/Armada7k8k/Library/RealTimeClockLib/RealTimeClockLib.c
index a48d44ed83..49c9385d53 100644
--- a/Silicon/Marvell/Armada7k8k/Library/RealTimeClockLib/RealTimeClockLib.c
+++ b/Silicon/Marvell/Armada7k8k/Library/RealTimeClockLib/RealTimeClockLib.c
@@ -140,11 +140,15 @@ LibGetWakeupTime (
 {
   UINT32 WakeupSeconds;
 
+  if (Time == NULL || Enabled == NULL || Pending == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
   *Enabled = MmioRead32 (mArmadaRtcBase + RTC_IRQ_2_CONFIG_REG) & RTC_IRQ_ALARM_EN;
 
   *Pending = MmioRead32 (mArmadaRtcBase + RTC_IRQ_STATUS_REG) & RTC_IRQ_ALARM_MASK;
   // Ack pending alarm
-  if (Pending) {
+  if (*Pending) {
     MmioWrite32 (mArmadaRtcBase + RTC_IRQ_STATUS_REG, RTC_IRQ_ALARM_MASK);
   }
 
@@ -176,14 +180,14 @@ LibSetWakeupTime (
 {
   UINTN       WakeupSeconds;
 
-  //
-  // Because the Armada RTC uses a 32-bit counter for seconds,
-  // the maximum time span is just over 136 years.
-  // Time is stored in Unix Epoch format, so it starts in 1970,
-  // Therefore it can not exceed the year 2106.
-  //
-  if ((Time->Year < 1970) || (Time->Year >= 2106)) {
-    return EFI_UNSUPPORTED;
+  // Handle timer disabling case
+  if (!Enabled) {
+    RtcDelayedWrite (RTC_IRQ_2_CONFIG_REG, 0);
+    return EFI_SUCCESS;
+  }
+
+  if (Time == NULL || !IsTimeValid (Time)) {
+    return EFI_INVALID_PARAMETER;
   }
 
   // Convert time to raw seconds
@@ -195,11 +199,8 @@ LibSetWakeupTime (
   // Issue delayed write to alarm register
   RtcDelayedWrite (RTC_ALARM_2_REG, (UINT32)WakeupSeconds);
 
-  if (Enabled) {
-    MmioWrite32 (mArmadaRtcBase + RTC_IRQ_2_CONFIG_REG, RTC_IRQ_ALARM_EN);
-  } else {
-    MmioWrite32 (mArmadaRtcBase + RTC_IRQ_2_CONFIG_REG, 0);
-  }
+  // Enable wakeup timer
+  RtcDelayedWrite (RTC_IRQ_2_CONFIG_REG, RTC_IRQ_ALARM_EN);
 
   return EFI_SUCCESS;
 }
-- 
2.29.0