xbee-init: script updated to use libgpiod tools

Additionally:
   - The handling of gpios has been swapped so 'Set low XBEE_SLEEP_RQ' is done
 before 'Power cycle XBEE_RESET_N' to assure the device doesn't enter sleep mode.
   - Removed ExecStop entry from systemd service since it's doing nothing.

https://jira.digi.com/browse/DEL-6424
https://jira.digi.com/browse/DEL-6423

Signed-off-by: Hector Bujanda <hector.bujanda@digi.com>

meta-digi-arm/conf/machine/ccimx8mn-dvk.conf

@@ -25,8 +25,8 @@ SERIAL_CONSOLES ?= "115200;ttymxc0"
 BT_TTY ?= "ttymxc1"
 
 # XBees
-XBEE_RESET_N_GPIO ?= "508,8"
+XBEE_RESET_N_GPIO ?= "mca-gpio@15,gpio1@8"
-XBEE_SLEEP_RQ_GPIO ?= "504,7"
+XBEE_SLEEP_RQ_GPIO ?= "mca-gpio@11,gpio1@7"
 XBEE_TTY ?= "ttymxc3"
 
 # U-Boot script to be copied to the boot image

meta-digi-arm/conf/machine/ccimx8x-sbc-express.conf

@@ -23,8 +23,8 @@ SERIAL_CONSOLES ?= "115200;ttyLP2"
 BT_TTY ?= "ttyLP1"
 
 # XBee
-XBEE_RESET_N_GPIO ?= "397"
+XBEE_RESET_N_GPIO ?= "gpio3@13"
-XBEE_SLEEP_RQ_GPIO ?= "400"
+XBEE_SLEEP_RQ_GPIO ?= "gpio3@16"
 XBEE_TTY ?= "ttyLP0"
 
 # U-Boot script to be copied to the boot image

meta-digi-arm/conf/machine/ccimx8x-sbc-pro.conf

@@ -26,8 +26,8 @@ SERIAL_CONSOLES ?= "115200;ttyLP2"
 BT_TTY ?= "ttyLP1"
 
 # XBee
-XBEE_RESET_N_GPIO ?= "220"
+XBEE_RESET_N_GPIO ?= "mca-gpio@15"
-XBEE_SLEEP_RQ_GPIO ?= "216"
+XBEE_SLEEP_RQ_GPIO ?= "mca-gpio@11"
 XBEE_TTY ?= "ttyMCA0"
 
 # U-Boot script to be copied to the boot image

meta-digi-dey/recipes-connectivity/xbee/xbee/xbee-init

@@ -4,47 +4,13 @@
 XBEE_RESET_N_GPIO="##XBEE_RESET_N_GPIO##"
 XBEE_SLEEP_RQ_GPIO="##XBEE_SLEEP_RQ_GPIO##"
 
-# request_gpio <gpio_nr>
-request_gpio_out() {
-	local SG_GPIONR="${1}"
-	local SG_GPIOPATH="/sys/class/gpio/gpio${SG_GPIONR}"
-
-	[ -d "${SG_GPIOPATH}" ] || printf "%s" "${SG_GPIONR}" > /sys/class/gpio/export
-	printf out > "${SG_GPIOPATH}/direction" && sleep .2
-}
-
-# free_gpio <gpio_nr>
-free_gpio() {
-	local SG_GPIONR="${1}"
-	local SG_GPIOPATH="/sys/class/gpio/gpio${SG_GPIONR}"
-
-	[ -d "${SG_GPIOPATH}" ] && printf "%s" "${SG_GPIONR}" > /sys/class/gpio/unexport
-}
-
-# set_gpio_value <gpio_nr> <value>
-set_gpio_value() {
-	local SG_GPIONR="${1}"
-	local SG_GPIOVAL="${2}"
-	local SG_GPIOPATH="/sys/class/gpio/gpio${SG_GPIONR}"
-
-	printf out > "${SG_GPIOPATH}/direction" && sleep .2
-	printf "${SG_GPIOVAL}" > "${SG_GPIOPATH}/value" && sleep .2
-}
-
 xbee_init() {
-	# Power cycle XBEE_RESET_N
-	request_gpio_out ${1}
-	set_gpio_value ${1} 0
-	set_gpio_value ${1} 1
-
 	# Set low XBEE_SLEEP_RQ
-	request_gpio_out ${2}
+	gpioset ${3} ${4}=0
-	set_gpio_value ${2} 0
-}
 
-xbee_stop() {
+	# Power cycle XBEE_RESET_N
-	free_gpio ${1}
+	gpioset ${1} ${2}=0
-	free_gpio ${2}
+	gpioset ${1} ${2}=1
 }
 
 xbee_iterate_list() {
@@ -54,9 +20,7 @@ xbee_iterate_list() {
 		for SLEEP in $(echo ${XBEE_SLEEP_RQ_GPIO} | sed "s/,/ /g"); do
 			if [ "${i}" = "${j}" ]; then
 				if [ "${1}" = "start" ]; then
-					xbee_init ${RESET} ${SLEEP}
+					xbee_init $(echo ${RESET} | sed "s/@/ /g") $(echo ${SLEEP} | sed "s/@/ /g")
-				elif [ "${1}" = "stop" ]; then
-					xbee_stop ${RESET} ${SLEEP}
 				fi
 			fi
 			j="$((j + 1))"
@@ -72,9 +36,6 @@ case "$1" in
 		echo "done."
 		;;
 	stop)
-		echo -n "Stopping XBee hardware: "
-		xbee_iterate_list stop
-		echo "done."
 		;;
 	restart)
 		$0 stop

meta-digi-dey/recipes-connectivity/xbee/xbee/xbee-init.service

@@ -6,7 +6,6 @@ Before=ModemManager.service
 Type=oneshot
 RemainAfterExit=yes
 ExecStart=/etc/xbee-init start
-ExecStop=/etc/xbee-init stop
 
 [Install]
 WantedBy=multi-user.target