diff --git a/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/files/nvme_powerctrl_library.sh b/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/files/nvme_powerctrl_library.sh
new file mode 100644
index 0000000..3737aac
--- /dev/null
+++ b/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/files/nvme_powerctrl_library.sh
@@ -0,0 +1,63 @@
+#!/bin/bash
+
+U2_PRESENT=( 148 149 150 151 152 153 154 155 )
+POWER_U2=( 195 196 202 199 198 197 127 126 )
+PWRGD_U2=( 161 162 163 164 165 166 167 168 )
+RST_BMC_U2=( 72 73 74 75 76 77 78 79 )
+PLUGGED=0
+I2C_BUS=8
+CHIP_ADDR=0x68
+CLOCK_GEN_VALUE=$(i2cget -y $I2C_BUS $CHIP_ADDR 0 i 2|cut -f3 -d' ')
+
+function set_gpio_direction()
+{
+    #$1 gpio pin, $2 'in','high','low'
+    echo $2 > /sys/class/gpio/gpio$1/direction
+}
+
+function read_gpio_input()
+{
+    #$1 read input gpio pin
+    echo $(cat /sys/class/gpio/gpio$1/value)
+}
+
+function enable_nvme_power()
+{
+    set_gpio_direction "${POWER_U2[$1]}" "high"
+    sleep 0.04
+    check_powergood $1
+}
+
+function check_powergood()
+{
+    if [ $(read_gpio_input ${PWRGD_U2[$1]}) == 1 ];then
+        sleep 0.005
+        update_clock_gen_chip_register $1 1
+        sleep 0.1
+        set_gpio_direction "${RST_BMC_U2[$1]}" "high"
+    else
+        disable_nvme_power $1
+    fi
+}
+
+function disable_nvme_power()
+{
+    set_gpio_direction "${RST_BMC_U2[$1]}" "low"
+    sleep 0.1
+    update_clock_gen_chip_register $1 0
+    sleep 0.005
+    set_gpio_direction "${POWER_U2[$1]}" "low"
+}
+
+function update_clock_gen_chip_register(){
+    #$1 nvme slot number, $2 enable/disable
+    update_value=$(printf '%x\n' "$((0x01 <<$1))")
+    if [ $2 -eq 1 ];then
+        CLOCK_GEN_VALUE=$(printf '0x%x\n' \
+        "$(($CLOCK_GEN_VALUE | 0x$update_value))")
+    else
+        CLOCK_GEN_VALUE=$(printf '0x%x\n' \
+        "$(($CLOCK_GEN_VALUE & ~0x$update_value))")
+    fi
+    i2cset -y $I2C_BUS $CHIP_ADDR 0 $CLOCK_GEN_VALUE s
+}
diff --git a/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/quanta-nvme-powerctrl.bb b/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/quanta-nvme-powerctrl.bb
index 8d0aa8c..ada2a6a 100644
--- a/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/quanta-nvme-powerctrl.bb
+++ b/meta-gsj/recipes-gsj/quanta-nvme-powerctrl/quanta-nvme-powerctrl.bb
@@ -14,6 +14,7 @@
 
 SRC_URI +=  "file://init_once.sh \
              file://nvme_powermanager.sh \
+             file://nvme_powerctrl_library.sh \
              file://nvme_gpio.service \
              file://nvme_powermanager.service \
             "
@@ -23,9 +24,12 @@
     install -m 0755 ${WORKDIR}/init_once.sh ${D}${bindir}/
     install -m 0755 ${WORKDIR}/nvme_powermanager.sh ${D}${bindir}/
 
+    install -d ${D}${libexecdir}
+    install -m 0755 ${WORKDIR}/nvme_powerctrl_library.sh ${D}${libexecdir}/
+
     install -d ${D}${systemd_unitdir}/system/
     install -m 0644 ${WORKDIR}/nvme_gpio.service ${D}${systemd_unitdir}/system
-    install -m 0644 ${WORKDIR}/nvme_powermanager.service ${D}${systemd_unitdir}/system 
+    install -m 0644 ${WORKDIR}/nvme_powermanager.service ${D}${systemd_unitdir}/system
 }
 
 SYSTEMD_PACKAGES = "${PN}"