This fixes the battery voltage monitoring gpio-hog settings.
When the gpio is low, it turns off the battery voltage to the ADC chip.
However, this needs to be on all of the time so that we can monitor
battery voltage.
Also, there was a typo that prevented pinmuxing from working correctly.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This adds a new node for the LEGO MINDSTORMS EV3 LCD display.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This adds a new node to the LEGO MINDSTORMS EV3 device tree for the battery.
Signed-off-by: David Lechner <david@lechnology.com>
[nsekhar@ti.com: minor headline fix]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This moves the spi0_cs3_pin pinconf node from the LEGO EV3 file to the
common DA850 include file. This node is applicable to any board, and
therefore belongs in the common file.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This adds a device tree node for sound on LEGO MINDSTORMS EV3. The EV3
uses one of the SoC PWMs connected to an amplifier to create sound from
a speaker.
The PWM is passed through a low-pass filter, so it is actually possible
to do PCM playback, but there is no existing driver, so just using
pwm-beeper for now, since it is also a compatible mode of operation.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This adds a node for the TI ADS7957 analog/digital converter on LEGO
MINDSTORMS EV3 as well as a regulator node that is used by the A/DC node.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This adds a device tree definition file for LEGO MINDSTORMS EV3.
What is working:
* Pin muxing
* Pinconf
* GPIOs
* MicroSD card reader
* UART on input port 1
* Buttons
* LEDs
* Poweroff/reset
* Flash memory
* EEPROM
* USB host port
* USB peripheral port
What is not working/to be added later:
* Speaker - have patch submitted to get pwm-beeper working - maybe someday
it will have a real sound driver that uses PRU
* A/DC chip - have driver submitted and accepted - waiting for ack on
device tree bindings
* Display - waiting for "simple DRM" to be mainlined
* Bluetooth - needs new driver for sequencing power/enable/clock
* Input and output ports - need some sort of new phy or extcon driver as
well as PRU UART and PRU I2C drivers
* Battery indication - needs new power supply driver
Note on flash partitions:
These partitions are based on the official EV3 firmware from LEGO. It is
expected that most users of the mainline kernel on EV3 will be booting from
an SD card while retaining the official firmware in the flash memory.
Furthermore, the official firmware uses an ancient U-Boot (2009) that has
no device tree support. So, it makes sense to have this partition table in
the EV3 device tree file. In the unlikely case that anyone does create
their own firmware image with different partitioning, they can use a modern
U-Boot in their own firmware image that modifies the device tree with the
custom partitions.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
