libgpiod: modify test 'gpioset: toggle (continuous)'

Look for level transitions when testing toggling
values because using fixed delays to assume value
changes is not reliable.

Signed-off-by: Joe Slater <joe.slater@windriver.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/libgpiod/libgpiod-2.x/gpio-tools-test-bats-modify.patch

@@ -0,0 +1,67 @@
+From 53f9670d6af1bd0745c1df9c469b269c72607b23 Mon Sep 17 00:00:00 2001
+From: Joe Slater <joe.slater@windriver.com>
+Date: Tue, 6 Jun 2023 08:04:27 -0700
+Subject: [PATCH] tools: tests: modify delays in toggle test
+
+The test "gpioset: toggle (continuous)" uses fixed delays to test
+toggling values. This is not reliable, so we switch to looking
+for transitions from one value to another.
+
+We wait for a transition up to 1.5 seconds.
+
+Signed-off-by: Joe Slater <joe.slater@windriver.com>
+Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
+
+Upstream-status: accepted
+
+Signed-off-by: Joe Slater <joe.slater@windriver.com>
+---
+ tools/gpio-tools-test.bats | 21 ++++++++++++++++-----
+ 1 file changed, 16 insertions(+), 5 deletions(-)
+
+diff --git a/tools/gpio-tools-test.bats b/tools/gpio-tools-test.bats
+index c83ca7d..929c35a 100755
+--- a/tools/gpio-tools-test.bats
++++ b/tools/gpio-tools-test.bats
+@@ -141,6 +141,20 @@ gpiosim_check_value() {
+ 	[ "$VAL" = "$EXPECTED" ]
+ }
+
++gpiosim_wait_value() {
++	local OFFSET=$2
++	local EXPECTED=$3
++	local DEVNAME=${GPIOSIM_DEV_NAME[$1]}
++	local CHIPNAME=${GPIOSIM_CHIP_NAME[$1]}
++	local PORT=$GPIOSIM_SYSFS/$DEVNAME/$CHIPNAME/sim_gpio$OFFSET/value
++
++	for i in {1..15}; do
++		[ "$(<$PORT)" = "$EXPECTED" ] && return
++		sleep 0.1
++	done
++	return 1
++}
++
+ gpiosim_cleanup() {
+ 	for CHIP in ${!GPIOSIM_CHIP_NAME[@]}
+ 	do
+@@ -1567,15 +1581,12 @@ request_release_line() {
+ 	gpiosim_check_value sim0 4 0
+ 	gpiosim_check_value sim0 7 0
+
+-	sleep 1
+-
+-	gpiosim_check_value sim0 1 0
++	gpiosim_wait_value sim0 1 0
+ 	gpiosim_check_value sim0 4 1
+ 	gpiosim_check_value sim0 7 1
+
+-	sleep 1
+
+-	gpiosim_check_value sim0 1 1
++	gpiosim_wait_value sim0 1 1
+ 	gpiosim_check_value sim0 4 0
+ 	gpiosim_check_value sim0 7 0
+ }
+-- 
+2.25.1
+

meta-oe/recipes-support/libgpiod/libgpiod_2.0.1.bb

@@ -9,6 +9,8 @@ LIC_FILES_CHKSUM = " \
 
 FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}-2.x:"
 
+SRC_URI += "file://gpio-tools-test-bats-modify.patch"
+
 SRC_URI[sha256sum] = "b5367d28d045b36007a4ffd42cceda4c358737ef4f2ce22b0c1d05ec57a38392"
 
 # Enable all project features for ptest