[PATCH 1/1] selftest: rtc: Add support rtc alarm content check

[Joseph Jang <jjang@nvidia.com>]

Some platforms do not support WAKEUP service by default, we use a shell
script to check the absence of alarm content in /proc/driver/rtc.

The script will validate /proc/driver/rtc when it is not empty and then
check if could find alarm content in it according to the rtc wakealarm
is supported or not.

Requires commit 101ca8d05913b ("rtc: efi: Enable SET/GET WAKEUP services
as optional")

Reviewed-by: Matthew R. Ochs <mochs@nvidia.com>
Signed-off-by: Joseph Jang <jjang@nvidia.com>
---
 tools/testing/selftests/Makefile              |  1 +
 tools/testing/selftests/rtc/property/Makefile |  5 ++++
 .../selftests/rtc/property/rtc-alarm-test.sh  | 27 +++++++++++++++++++
 3 files changed, 33 insertions(+)
 create mode 100644 tools/testing/selftests/rtc/property/Makefile
 create mode 100755 tools/testing/selftests/rtc/property/rtc-alarm-test.sh

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index e1504833654d..f5d43e2132e8 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -80,6 +80,7 @@ TARGETS += riscv
 TARGETS += rlimits
 TARGETS += rseq
 TARGETS += rtc
+TARGETS += rtc/property
 TARGETS += rust
 TARGETS += seccomp
 TARGETS += sgx
diff --git a/tools/testing/selftests/rtc/property/Makefile b/tools/testing/selftests/rtc/property/Makefile
new file mode 100644
index 000000000000..c6f7aa4f0e29
--- /dev/null
+++ b/tools/testing/selftests/rtc/property/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+TEST_PROGS := rtc-alarm-test.sh
+
+include ../../lib.mk
+
diff --git a/tools/testing/selftests/rtc/property/rtc-alarm-test.sh b/tools/testing/selftests/rtc/property/rtc-alarm-test.sh
new file mode 100755
index 000000000000..3bee1dd5fbd0
--- /dev/null
+++ b/tools/testing/selftests/rtc/property/rtc-alarm-test.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+if [ ! -f /proc/driver/rtc ]; then
+	echo "SKIP: the /proc/driver/rtc is empty."
+	exit 4
+fi
+
+# Check if could find alarm content in /proc/driver/rtc according to
+# the rtc wakealarm is supported or not.
+if [ -n "$(ls /sys/class/rtc/rtc* | grep -i wakealarm)" ]; then
+	if [ -n "$(grep -i alarm /proc/driver/rtc)" ]; then
+		exit 0
+	else
+		echo "ERROR: The alarm content is not found."
+		cat /proc/driver/rtc
+		exit 1
+	fi
+else
+	if [ -n "$(grep -i alarm /proc/driver/rtc)" ]; then
+		echo "ERROR: The alarm content is found."
+		cat /proc/driver/rtc
+		exit 1
+	else
+		exit 0
+	fi
+fi
-- 
2.34.1