From 6ff1da40c7688a880920c3f4b0f1d530775c315c Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Fri, 14 Jun 2019 07:35:21 +0200
Subject: dev/sc16is752: Add RS485 mode variants

---
 cpukit/dev/serial/sc16is752.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

(limited to 'cpukit/dev/serial/sc16is752.c')

diff --git a/cpukit/dev/serial/sc16is752.c b/cpukit/dev/serial/sc16is752.c
index a58b87bfb7..5384563abe 100644
--- a/cpukit/dev/serial/sc16is752.c
+++ b/cpukit/dev/serial/sc16is752.c
@@ -212,6 +212,7 @@ static bool sc16is752_first_open(
 {
   bool ok;
   uint8_t fcr;
+  uint8_t efcr;
 
   (void)args;
   sc16is752_context *ctx = (sc16is752_context *)base;
@@ -223,12 +224,23 @@ static bool sc16is752_first_open(
     return ok;
   }
 
-  if (ctx->mode == SC16IS752_MODE_RS485) {
-    ctx->efcr = SC16IS752_EFCR_RS485_ENABLE;
-  } else {
-    ctx->efcr = 0;
+  efcr = 0;
+
+  switch (ctx->mode) {
+    case SC16IS752_MODE_RS485_RTS_INV:
+      efcr |= SC16IS752_EFCR_RTSINVER;
+      /* Fall through */
+    case SC16IS752_MODE_RS485_RTS:
+      efcr |= SC16IS752_EFCR_RTSCON;
+      /* Fall through */
+    case SC16IS752_MODE_RS485:
+      efcr |= SC16IS752_EFCR_RS485_ENABLE;
+      break;
+    default:
+      break;
   }
 
+  ctx->efcr = efcr;
   write_reg(ctx, SC16IS752_FCR, &ctx->efcr, 1);
 
   fcr = SC16IS752_FCR_FIFO_EN
-- 
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