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Commit 7d7eff8f authored by David Lechner's avatar David Lechner Committed by Sekhar Nori
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ARM: dts: da850-lego-ev3: Add node for reboot modes 



This adds a new node for reboot modes on LEGO MINDSTORMS EV3. The EV3's
bootloader looks for a magic number in the ARM local RAM and if found,
it will boot into a special firmware update mode where the flash memory
can be written via USB.

This has been testing working using the command:

    # systemctl reboot loader

Signed-off-by: default avatarDavid Lechner <david@lechnology.com>
Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
parent 7928b2cb

arch/arm/boot/dts/da850-lego-ev3.dts

+17 −0
Original line number Diff line number Diff line
@@ -184,6 +184,23 @@ 
		io-channel-names = "voltage", "current";

		rechargeable-gpios = <&gpio 136 GPIO_ACTIVE_LOW>;

	};



	/* ARM local RAM */

	memory@ffff0000 {

		compatible = "syscon", "simple-mfd";

		reg = <0xffff0000 0x2000>; /* 8k */



		/*

		 * The I2C bootloader looks for this magic value to either

		 * boot normally or boot into a firmware update mode.

		 */

		reboot-mode {

			compatible = "syscon-reboot-mode";

			offset = <0x1ffc>;

			mode-normal = <0x00000000>;

			mode-loader = <0x5555aaaa>;

		};

	};

};



&pmx_core {