OLED display consist of an OLED panel and a display controller.
The displays that were used on yapp4 platform were based on a SSD1305
controller. These displays are now discontinued and we need to add
support for a replacement.
The new display is based on SSD1309 controller and requires slightly
different configuration (mirror + segment offset). We want to support
both display types so it does no matter which one was used on the assembly
line. Hence the displays are placed at different I2C addresses.
Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
imx6dl-yapp4 Draco and Ursa boards use the I2C3 bus to control some
external devices through the /dev files.
So enable the I2C3 bus on all board variants, not just on Hydra.
Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Add the touch keyboard present on Hydra board. The controller
is connected only using I2C lines. The interrupt line is not
available hence we use the polling mode.
Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Michal Vokáč