Implement a platform driver that matches with xlnx,
sd-fec-1.1 device tree node and registers as a character
device, including:
- SD-FEC driver binds to sdfec DT node.
- creates and initialise an initial driver dev structure.
- add the driver in Linux build and Kconfig.

Tested-by: Dragan Cvetic <redacted>
Signed-off-by: Derek Kiernan <redacted>
Signed-off-by: Dragan Cvetic <redacted>
---
 drivers/misc/Kconfig        |  12 +++++
 drivers/misc/Makefile       |   1 +
 drivers/misc/xilinx_sdfec.c | 118 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 131 insertions(+)
 create mode 100644 drivers/misc/xilinx_sdfec.c

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 6b0417b..319a6bf 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig

@@ -471,6 +471,18 @@ config PCI_ENDPOINT_TEST
            Enable this configuration option to enable the host side test driver
            for PCI Endpoint.
 
+config XILINX_SDFEC
+	tristate "Xilinx SDFEC 16"
+	help
+	  This option enables support for the Xilinx SDFEC (Soft Decision
+	  Forward Error Correction) driver. This enables a char driver
+	  for the SDFEC.
+
+	  You may select this driver if your design instantiates the
+	  SDFEC(16nm) hardened block. To compile this as a module choose M.
+
+	  If unsure, say N.
+
 config MISC_RTSX
 	tristate
 	default MISC_RTSX_PCI || MISC_RTSX_USB

diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index b9affcd..0cb3546 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile

@@ -59,3 +59,4 @@ obj-$(CONFIG_OCXL)		+= ocxl/
 obj-y				+= cardreader/
 obj-$(CONFIG_PVPANIC)   	+= pvpanic.o
 obj-$(CONFIG_HABANA_AI)		+= habanalabs/
+obj-$(CONFIG_XILINX_SDFEC)	+= xilinx_sdfec.o

diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c
new file mode 100644
index 0000000..75cc980
--- /dev/null
+++ b/drivers/misc/xilinx_sdfec.c

@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx SDFEC
+ *
+ * Copyright (C) 2019 Xilinx, Inc.
+ *
+ * Description:
+ * This driver is developed for SDFEC16 (Soft Decision FEC 16nm)
+ * IP. It exposes a char device which supports file operations
+ * like  open(), close() and ioctl().
+ */
+
+#include <linux/miscdevice.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/poll.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+
+static int xsdfec_ndevs;