From faeb14dc5a6ade086a76a4d02806b3573a974f02 Mon Sep 17 00:00:00 2001
From: Megan Wachs <megan@sifive.com>
Date: Fri, 24 Mar 2017 17:27:55 -0700
Subject: [PATCH] JTAG: make TRSTn optional for all helpers as well to match
 the IO.

---
 src/main/scala/devices/gpio/JTAG.scala | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/main/scala/devices/gpio/JTAG.scala b/src/main/scala/devices/gpio/JTAG.scala
index 947955f..ba40bc6 100644
--- a/src/main/scala/devices/gpio/JTAG.scala
+++ b/src/main/scala/devices/gpio/JTAG.scala
@@ -13,28 +13,28 @@ import Chisel._
 import config._
 import jtag.{JTAGIO}
 
-class JTAGPinsIO extends Bundle {
+class JTAGPinsIO(hasTRSTn: Boolean = true) extends Bundle {
 
   val TCK    = new GPIOPin()
   val TMS    = new GPIOPin()
   val TDI    = new GPIOPin()
   val TDO    = new GPIOPin()
-  val TRSTn  = new GPIOPin()
+  val TRSTn  = if (hasTRSTn) Option(new GPIOPin()) else None
 
 }
 
-class JTAGGPIOPort()(implicit p: Parameters) extends Module {
+class JTAGGPIOPort(hasTRSTn: Boolean = true)(implicit p: Parameters) extends Module {
 
   val io = new Bundle {
     // TODO: make this not hard-coded true.
-    val jtag = new JTAGIO(hasTRSTn = true)
-    val pins = new JTAGPinsIO()
+    val jtag = new JTAGIO(hasTRSTn)
+    val pins = new JTAGPinsIO(hasTRSTn)
   }
 
   io.jtag.TCK  := GPIOInputPinCtrl(io.pins.TCK, pue = Bool(true)).asClock
   io.jtag.TMS  := GPIOInputPinCtrl(io.pins.TMS, pue = Bool(true))
   io.jtag.TDI  := GPIOInputPinCtrl(io.pins.TDI, pue = Bool(true))
-  io.jtag.TRSTn.get := GPIOInputPinCtrl(io.pins.TRSTn, pue = Bool(true))
+  io.jtag.TRSTn.foreach{t => t := GPIOInputPinCtrl(io.pins.TRSTn.get, pue = Bool(true))}
 
   GPIOOutputPinCtrl(io.pins.TDO, io.jtag.TDO.data)
   io.pins.TDO.o.oe := io.jtag.TDO.driven
-- 
2.30.2