• David Lechner's avatar
    ARM: dts: Add LEGO MINDSTORMS EV3 dts · 4302a38e
    David Lechner authored
    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: default avatarDavid Lechner <david@lechnology.com>
    Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
    4302a38e
da850-lego-ev3.dts 5.73 KB