[U-Boot] [PATCH 12/19] doc: dtbinding: Add Intel Arria 10 SoCFPGA chosen binding

[tien.fong.chee at intel.com <tien.fong.chee@intel.com>]

From: Tien Fong Chee <tien.fong.chee@intel.com>

This patch adding the Intel Arria 10 SoCFPGA chosen binding info.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
---
 doc/device-tree-bindings/chosen.txt |   45 +++++++++++++++++++++++++++++++++++
 1 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/doc/device-tree-bindings/chosen.txt b/doc/device-tree-bindings/chosen.txt
index 5625d21..09473a5 100644
--- a/doc/device-tree-bindings/chosen.txt
+++ b/doc/device-tree-bindings/chosen.txt
@@ -63,3 +63,48 @@ Example
 		u-boot,spl-boot-order = &sdmmc, "/sdhci at fe330000";
 	};
 };
+
+Intel SoCFPGA
+--------------
+
+Arria 10 FPGA design filename and partition properties
+------------------------------------------------------
+In Intel Arria 10 SoCFPGA, FPGA is programmed by both SPL and U-boot.
+Those FPGA designs are normally stored in the flashes, it could be in SDMMC,
+QSPI and NAND.
+For bootloader to know where to look those files and how to program the FPGA,
+those files' filename, and flash partition are defined in device tree.
+There are three properties as shown in below:
+
+Example
+-------
+/ {
+	chosen {
+		cff-file = "ghrd_10as066n2.periph.rbf.mkimage";
+	};
+};
+
+cff-file is assigned with peripheral raw binary filename. Peripheral raw binary
+file is used to configure FPGA IOs, IO48, DDR and PLL.
+
+/ {
+	chosen {
+		cffcore-file = "ghrd_10as066n2.core.rbf.mkimage";
+	};
+};
+
+cffcore-file is assigned with core raw binary filename. Core raw binary
+file contains FPGA design, which is used to configure FPGA CRAM and ERAM.
+
+/ {
+	chosen {
+		cff_devpart = "0:1";
+	};
+};
+
+cff_devpart is assigned to partition(default: FAT) where cff-file and
+cffcore-file are stored.
+[<dev{:part}>] dev is flash device number and part is flash partition.
+
+Note: For cff-file, the device number is always zero, and only the partition
+could be defined by user.
-- 
1.7.7.4