See https://www.youtube.com/watch?v=8wMlACfEO0A for demo!

02-wowlan

#!/bin/bash

# this script lives in /etc/NetworkManager/dispatcher.d/02-wowlan
# it matches incoming packets with destination port 22 (0x0016)
# on ipv4 (the short one) and ipv6 (the long one)

if [[ "$@" == "wlan0 up" ]]; then
	iw phy0 wowlan enable any
	iwpriv wlan0 wow_set_pattern clean
	iwpriv wlan0 wow_set_pattern pattern=-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:00:16
	iwpriv wlan0 wow_set_pattern pattern=-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:00:16
fi

enable-wowlan-in-rtl8723cs.patch

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
index 441358592072eb97426953ef742866ce227add97..e929d635940bee98f8c263f55b76c1e42e01ba53 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
@@ -483,6 +483,7 @@ &mmc1 {
 	bus-width = <4>;
 	non-removable;
 	status = "okay";
+	keep-power-in-suspend;
 
 	rtl8723cs: wifi@1 {
 		reg = <1>;
diff --git a/drivers/staging/rtl8723cs/Makefile b/drivers/staging/rtl8723cs/Makefile
index 60c1c864db42f22105124d1dbde68984e99e75f4..0b60caa83e75733f80fb765e49080ef190763a5e 100644
--- a/drivers/staging/rtl8723cs/Makefile
+++ b/drivers/staging/rtl8723cs/Makefile
@@ -108,9 +108,10 @@ CONFIG_RTW_LOG_LEVEL = 6
 CONFIG_PROC_DEBUG = y
 
 ######################## Wake On Lan ##########################
-CONFIG_WOWLAN = n
+CONFIG_WOWLAN = y
 #bit3: ARP enable, bit2: deauth, bit1: unicast, bit0: magic pkt.
-CONFIG_WAKEUP_TYPE = 0xf
+#enabling unicast causes unwanted wake-ups all the time, so disable
+CONFIG_WAKEUP_TYPE = 0xd
 CONFIG_WOW_LPS_MODE = default
 #bit0: disBBRF off, #bit1: Wireless remote controller (WRC)
 CONFIG_SUSPEND_TYPE = 0
@@ -127,7 +128,7 @@ CONFIG_PNO_SUPPORT = n
 CONFIG_PNO_SET_DEBUG = n
 CONFIG_AP_WOWLAN = n
 ######### Notify SDIO Host Keep Power During Syspend ##########
-CONFIG_RTW_SDIO_PM_KEEP_POWER = n
+CONFIG_RTW_SDIO_PM_KEEP_POWER = y
 ###################### MP HW TX MODE FOR VHT #######################
 CONFIG_MP_VHT_HW_TX_MODE = n
 ###################### ROAMING #####################################
diff --git a/drivers/staging/rtl8723cs/os_dep/linux/sdio_intf.c b/drivers/staging/rtl8723cs/os_dep/linux/sdio_intf.c
index c20c136d111d867b85b6a6c38389d5ef56f75d47..4168e2949748bdb7abdcd797f4776afbbe70ea0e 100644
--- a/drivers/staging/rtl8723cs/os_dep/linux/sdio_intf.c
+++ b/drivers/staging/rtl8723cs/os_dep/linux/sdio_intf.c
@@ -269,9 +269,7 @@ static u8 gpio_hostwakeup_alloc_irq(PADAPTER padapter)
 	} else
 		RTW_INFO("allocate gpio irq %d ok\n", oob_irq);
 
-#ifndef CONFIG_PLATFORM_ARM_SUN8I
 	enable_irq_wake(oob_irq);
-#endif
 	return _SUCCESS;
 }
 
@@ -282,9 +280,7 @@ static void gpio_hostwakeup_free_irq(PADAPTER padapter)
 	if (oob_irq == 0)
 		return;
 
-#ifndef CONFIG_PLATFORM_ARM_SUN8I
 	disable_irq_wake(oob_irq);
-#endif
 	free_irq(oob_irq, padapter);
 }
 #endif

Quick_Start_Guide_for_WOW.pdf