From 52560bba37bbde74c00a51d6d645a76300355027 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Fri, 18 Nov 2016 08:41:27 -0600
Subject: [PATCH] ENC28J60:  Allow either HP or LP work queue to be used.

---
 drivers/net/Kconfig    | 18 ++++++++++++++++++
 drivers/net/enc28j60.c | 16 ++++++++++++----
 2 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 8852ead7b8..adf7aa5f1a 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -218,6 +218,24 @@ config ENC28J60_FREQUENCY
 	---help---
 		Define to use a different bus frequency
 
+choice
+	prompt "Work queue"
+	default ENC28J60_LPWORK if SCHED_LPWORK
+	default ENC28J60_HPWORK if !SCHED_LPWORK && SCHED_HPWORK
+	depends on SCHED_WORKQUEUE
+	---help---
+		Work queue support is required to use the ENC28J60 driver.  If the low priority work queue is available, then it should be used by the ENC28J60.
+
+config ENC28J60_HPWORK
+	bool "High priority"
+	depends on SCHED_HPWORK
+
+config ENC28J60_LPWORK
+	bool "Low priority"
+	depends on SCHED_LPWORK
+
+endchoice # Work queue
+
 config ENC28J60_HALFDUPPLEX
 	bool "Enable half dupplex"
 	default n
diff --git a/drivers/net/enc28j60.c b/drivers/net/enc28j60.c
index 98edc13417..78da85e04c 100644
--- a/drivers/net/enc28j60.c
+++ b/drivers/net/enc28j60.c
@@ -115,8 +115,16 @@
 
 /* We need to have the work queue to handle SPI interrupts */
 
-#ifndef CONFIG_SCHED_WORKQUEUE
+#if !defined(CONFIG_SCHED_WORKQUEUE)
 #  error "Worker thread support is required (CONFIG_SCHED_WORKQUEUE)"
+#else
+#  if defined(CONFIG_ENC28J60_HPWORK)
+#    define ENCWORK HPWORK
+#  elif defined(CONFIG_ENC28J60_LPWORK)
+#    define ENCWORK LPWORK
+#  else
+#    error "Neither CONFIG_ENC28J60_HPWORK nor CONFIG_ENC28J60_LPWORK defined"
+#  endif
 #endif
 
 /* CONFIG_ENC28J60_DUMPPACKET will dump the contents of each packet to the console. */
@@ -1852,7 +1860,7 @@ static int enc_interrupt(int irq, FAR void *context)
    */
 
   priv->lower->disable(priv->lower);
-  return work_queue(HPWORK, &priv->irqwork, enc_irqworker, (FAR void *)priv, 0);
+  return work_queue(ENCWORK, &priv->irqwork, enc_irqworker, (FAR void *)priv, 0);
 }
 
 /****************************************************************************
@@ -1944,7 +1952,7 @@ static void enc_txtimeout(int argc, uint32_t arg, ...)
    * can occur until we restart the Tx timeout watchdog.
    */
 
-  ret = work_queue(HPWORK, &priv->towork, enc_toworker, (FAR void *)priv, 0);
+  ret = work_queue(ENCWORK, &priv->towork, enc_toworker, (FAR void *)priv, 0);
   DEBUGASSERT(ret == OK);
   UNUSED(ret);
 }
@@ -2040,7 +2048,7 @@ static void enc_polltimer(int argc, uint32_t arg, ...)
    * occur until we restart the poll timeout watchdog.
    */
 
-  ret = work_queue(HPWORK, &priv->pollwork, enc_pollworker, (FAR void *)priv, 0);
+  ret = work_queue(ENCWORK, &priv->pollwork, enc_pollworker, (FAR void *)priv, 0);
   DEBUGASSERT(ret == OK);
   UNUSED(ret);
 }