From f6aa84508051a6b2a6d5339619618c37d7c3f3ea Mon Sep 17 00:00:00 2001
From: David Sidrane <David.Sidrane@NscDg.com>
Date: Fri, 18 Sep 2020 05:04:56 -0700
Subject: [PATCH] stm32f7:Allow the use of the Network Monitor via polling

   Not all boards have an interrupt line from the phy to
   the Soc. This commit allows the phy to be polled for
   link status.

   This may not work on all MAC/PHY combination that
   have mutually exclusive link management and operating
   modes. The STM32F7 and LAN8742AI do not have such a
   limitation.
---
 arch/arm/src/stm32f7/Kconfig | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm/src/stm32f7/Kconfig b/arch/arm/src/stm32f7/Kconfig
index 09c8f9e2bd..3af3678d6f 100644
--- a/arch/arm/src/stm32f7/Kconfig
+++ b/arch/arm/src/stm32f7/Kconfig
@@ -1144,6 +1144,10 @@ config STM32F7_HAVE_ETHRNET
 	bool
 	default n
 
+config STM32F7_HAVE_PHY_POLLED
+	bool
+	default n
+
 config STM32F7_HAVE_RNG
 	bool
 	default n
@@ -1402,6 +1406,7 @@ config STM32F7_ETHMAC
 	depends on STM32F7_HAVE_ETHRNET
 	select NETDEVICES
 	select ARCH_HAVE_PHY
+	select STM32F7_HAVE_PHY_POLLED
 
 config STM32F7_FMC
 	bool "FMC"
@@ -5268,6 +5273,16 @@ config STM32F7_PHYINIT
 		provide stm32_phyinitialize();  The STM32 Ethernet driver will call this function
 		one time before it first uses the PHY.
 
+config STM32F7_PHY_POLLING
+	bool "Support network monitoring by poling the PHY"
+	default n
+	depends on STM32F7_HAVE_PHY_POLLED
+	select ARCH_PHY_POLLED
+	---help---
+		Some boards may not have an interrupt connected to the PHY.
+		This option allows the network monitor to be used by polling the
+		the PHY for status.
+
 config STM32F7_MII
 	bool "Use MII interface"
 	default n