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    • 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
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