The function of each SoM pins is defined in the DHCOM standard [1] and
subset of them is defined as GPIOs (pins A-W). To ensure the interchange-
ability of the DHCOM SoMs, the function of the pins are fixed and cannot
be changed. On board level the DHCOM GPIOs can be used associated with
different blocks e.g. for interrupt or reset, but the function is always
GPIO. If not used, they can be freely used in the user space.
Therefore the whole configuration of SoM pins is made in the SoM DT.
Defining the DHCOM GPIO pins as a separate pinctrl nodes makes moving a
subset of them to an appropriate block pinctrl group easier on board level,
since it is not necessary to have a large pinctrl hog group containing
unrelated pinmux entries on board level. This also makes it easy to update
the SoM DT without having to update all the board DTs too. If necessary it
is also possible to change the electrical properties of the DHCOM GPIOs by
overwriting the pinctrl on board level.
[1] https://wiki.dh-electronics.com/images/2/2e/DOC_DHCOM-Standard-Specification_R01_2016-11-17.pdf
Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Marek Vasut <marex@denx.de>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: kernel@dh-electronics.com
To: linux-arm-kernel@lists.infradead.org
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
The PDK2 board is capable of running both 100M and 1G ethernet. However,
the i.MX6 has only one ethernet MAC, so it is possible to configure
either 100M or 1G Ethernet. In case of 100M option, the PHY is on the
SoM and the signals are routed to a RJ45 port. For 1G the PHY is on
the PDK2 board with another RJ45 port. 100M and 1G ethernet use
different signal pins from the i.MX6, but share the MDIO bus.
This SoM board combination is used to demonstrate how to enable 1G
ethernet configuration.
Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Marek Vasut <marex@denx.de>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: kernel@dh-electronics.com
To: linux-arm-kernel@lists.infradead.org
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
The imx-pwm driver supports 3 cells and this is the more flexible setting.
So use it by default and overwrite it back to two for the files that
reference the PWMs with just 2 cells to minimize changes.
This allows to drop explicit setting to 3 cells for the boards that already
depend on this. The boards that are now using 2 cells explicitly can be
converted to 3 individually.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Add support for the DH i.MX6 Quad based SoM and a PDK2 evaluation board.
The evaluation board features three serial ports, USB OTG, USB host with
an USB hub, Fast or Gigabit ethernet, eMMC, uSD, SD, mSATA, analog audio,
PCIe and HDMI video output.
All of the aforementioned features are supported by this patch.
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
