]> git.sur5r.net Git - u-boot/commit
spi: mxc: fix sf probe when using mxc_spi
authorNikita Kiryanov <nikita@compulab.co.il>
Wed, 20 Aug 2014 12:08:50 +0000 (15:08 +0300)
committerJagannadha Sutradharudu Teki <jaganna@xilinx.com>
Wed, 24 Sep 2014 11:55:39 +0000 (17:25 +0530)
commit155fa9af95ac5be857a7327e7a968a296e60d4c8
treea35b45e4eee9707e0661e0da7f86b28b6ab393b6
parent01d2aaf61ba7d532dee7002a2049d2b972992122
spi: mxc: fix sf probe when using mxc_spi

MXC SPI driver has a feature whereas a GPIO line can be used to force CS high
across multiple transactions. This is set up by embedding the GPIO information
in the CS value:

cs = (cs | gpio << 8)

This merge of cs and gpio data into one value breaks the sf probe command:
if the use of gpio is required, invoking "sf probe <cs>" will not work, because
the CS argument doesn't have the GPIO information in it. Instead, the user must
use "sf probe <cs | gpio << 8>". For example, if bank 2 gpio 30 is used to force
cs high on cs 0, bus 0, then instead of typing "sf probe 0" the user now must
type "sf probe 15872".

This is inconsistent with the description of the sf probe command, and forces
the user to be aware of implementaiton details.

Fix this by introducing a new board function: board_spi_cs_gpio(), which will
accept a naked CS value, and provide the driver with the relevant GPIO, if one
is necessary.

Cc: Eric Nelson <eric.nelson@boundarydevices.com>
Cc: Eric Benard <eric@eukrea.com>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tom Rini <trini@ti.com>
Cc: Marek Vasut <marex@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
16 files changed:
board/boundary/nitrogen6x/nitrogen6x.c
board/embest/mx6boards/mx6boards.c
board/freescale/mx6qsabreauto/mx6qsabreauto.c
board/freescale/mx6sabresd/mx6sabresd.c
board/freescale/mx6slevk/mx6slevk.c
board/gateworks/gw_ventana/gw_ventana.c
board/genesi/mx51_efikamx/efikamx.c
board/ttcontrol/vision2/vision2.c
drivers/spi/mxc_spi.c
include/configs/embestmx6boards.h
include/configs/gw_ventana.h
include/configs/mx51_efikamx.h
include/configs/mx6sabre_common.h
include/configs/mx6slevk.h
include/configs/nitrogen6x.h
include/configs/vision2.h