[U-Boot] [PATCH v2 4/5] doc: SPI: Update the dual_flash info

[Jagannadha Sutradharudu Teki]

Updated the dual_flash documentation as it uses
mode_bits from spi drivers to inform the sf framework.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna at xilinx.com>
Cc: Marek Vasut <marex at denx.de>
---
 doc/SPI/README.dual-flash  | 5 +++--
 doc/SPI/README.sf-features | 3 +++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/doc/SPI/README.dual-flash b/doc/SPI/README.dual-flash
index 6c88d65..05b875f 100644
--- a/doc/SPI/README.dual-flash
+++ b/doc/SPI/README.dual-flash
@@ -9,7 +9,8 @@ to a given controller with single chip select line, but there are some
 hw logics(ex: xilinx zynq qspi) that describes two/dual memories are
 connected with a single chip select line from a controller.
 
-"dual_flash" from include/spi.h describes these types of connection mode
+"dual_flash" from include/spi_flash.h describes these types of connection mode
+in spi flash side and "mode_bits" options for controller driver.
 
 Possible connections:
 --------------------
@@ -54,7 +55,7 @@ SF_DUAL_STACKED_FLASH:
                by default, if U_PAGE is unset lower memory should accessible,
                once user wants to access upper memory need to set U_PAGE.
 
-SPI_FLASH_CONN_DUALPARALLEL:
+SF_DUAL_PARALLEL_FLASH:
 	- dual spi/qspi flash memories are connected with a single chipselect
 	  line and these two memories are operating parallel with separate buses.
 	- xilinx zynq qspi controller has implemented this feature [1]
diff --git a/doc/SPI/README.sf-features b/doc/SPI/README.sf-features
index d35f56d..4047e95 100644
--- a/doc/SPI/README.sf-features
+++ b/doc/SPI/README.sf-features
@@ -73,6 +73,9 @@ based on the selected flash features/operations from spi_slave {} and
 spi_flash_params {} - include/spi_flash.h
 
 @dual_flash: flash can be operated in dual flash [3]
+- SF_SINGLE_FLASH: default connection single flash
+- SF_DUAL_STACKED_FLASH: dual flash with dual stacked connection
+- SF_DUAL_PARALLEL_FLASH: dual flash with dual parallel connection
 @shift: variable shift operator useful for dual parallel
 @poll_cmd: find the read_status or flag_status for polling erase/write operations
 @erase_cmd: discovered erase command
-- 
1.8.3