The spi-mxs driver does not allow full duplex SPI transfers. The
spi-gpio driver may be used as an alternative if this is required.
Make the choice between those drivers easier for the end user by
providing settings for both drivers.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
The labels on the spidev nodes are not used and not required, so
remove them. The TX28 supports 3 chipselects on the SPI
interface. Make all those chipselects available to the user.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
The lcdif node has a property named "display" and also a child node
called "display", which causes the following warning:
device-tree: Duplicate name in lcdif@80030000, renamed to "display#1"
Rename the child node name in order to avoid the warning.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
'enable-active-low' is not a valid property for a GPIO controlled regulator.
According to Documentation/devicetree/bindings/regulator/gpio-regulator.txt:
"Optional properties:
...
- enable-active-high : Polarity of GPIO is active high (default is low)."
,so the correct way to define an active-low GPIO controlled regulator is to
simply not pass 'enable-active-high'.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
The device tree specification recommends that generic name should be
used for nodes. So instead of naming those fixed regulator nodes
arbitrarily, let's use the generic name 'regulator@num' for those nodes.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Update the Ka-Ro TX28 DTS file.
- add Copyright header
- use label references for better readability
- sort the entries alphabetically
- add some aliases used by U-Boot to modify the DT data
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Convert mx23/mx28 dts filed to use the pinctrl header files.
NOTE: During automatic conversion of these files to use the pinconfig
definitions an inconsistency has been found in:
arch/arm/boot/dts/imx28-apx4devkit.dts
According to the comment the function for pad SSP2_SS0 should have
been MX28_PAD_SSP2_SS0__GPIO_2_19, while the given value 0x2131
represents: MX28_PAD_SSP2_SS0__AUART3_TX
I used the later (though probably wrong) definition because that's
what is actually being used in the DTB.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
hog_pins is used to setup the pin functions, and it is not neccesarily used only
for GPIO pins, so use only 'hog' to describe a more generic term.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
For non-DT boot, function tx28_add_fec0 configures all ENET0 pins
into gpio mode for resetting fec phy, and then reconfigures those pins
into ENET function after that.
For DT boot, all the pin configuration is done by pinctrl subsystem.
Ideally, when gpio_request gets called, GPIO subsystem should call
pinctrl to configure pins into gpio mode automatically, and have pins
freed up from pinctrl subsystem when gpio_free is called. But right
now, this cooperation between gpio and pinctrl hasn't been available.
As the result, we have to explicitly call pinctrl_get_select and
pinctrl_put for device tree boot.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Lothar Waßmann <LW@KARO-electronics.de>
Rename mxs dts files with soc name being the prefix, so that the board
dts file can be located easily by soc name, and we also gain the
consistency of naming.
Suggested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Lothar Waßmann