U-Boot-for-Yukawa.md

 Flashing U-Boot for Yukawa
 ==========================
 
+* With a SEI610 flashed with Amlogic U-Boot only (original board state) => [From a SEI610 flashed with Amlogic U-Boot](#from-a-sei610-flashed-with-amlogic-u-boot)
+* With a SEI610 flashed with Mainline U-Boot (supporting `fastboot flash bootloader`) => [From a SEI610 flashed with Mainline U-Boot](#from-a-sei610-flashed-with-mainline-u-boot)
+
+From a SEI610 flashed with Amlogic U-Boot
+=========================================
+Boot while pressing the "USB BOOT" button under the device, then:
+
+When the board rebooted in USB ROM boot mode:
+---------------------------------------------
+`lsusb` should show :
+```
+Bus 001 Device 106: ID 1b8e:c003 Amlogic, Inc.
+```
+And the serial should show:
+```
+SM1:BL:0253b8:61aa2d;FEAT:E0F931...
+```
+
+Load U-Boot from USB:
+```
+update write u-boot.bin 0xfffa0000 0x10000
+update run 0xfffa0000
+update bl2_boot u-boot.bin
+```
+
+U-Boot should boot and run fastboot, then:
+```
+fastboot oem format
+fastboot flash bootloader u-boot.bin
+fastboot erase bootenv
+fastboot reboot
+```
+
+From a SEI510 flashed with Mainline U-Boot
+================================================================
+
+Reboot to bootloader or press the recovery button under the device, then:
+```
+fastboot flash bootloader u-boot.bin
+fastboot erase bootenv
+```
+
+Flashing U-Boot for Yukawa (SEI510)
+====================================
+
 * With a SEI510 flashed with Amlogic U-Boot only (original board state) => [From a SEI510 flashed with Amlogic U-Boot](#from-a-sei510-flashed-with-amlogic-u-boot)
 * With a SEI510 flashed with an earlier version of Mainline U-Boot (No support for `fastboot flash bootloader`) => [From a SEI510 flashed with an earlier version of Mainline U-Boot](#from-a-sei510-flashed-with-an-earlier-version-of-mainline-u-boot)
 * With a SEI510 flashed with Mainline U-Boot (supporting `fastboot flash bootloader`) => [From a SEI510 flashed with Mainline U-Boot](#from-a-sei510-flashed-with-mainline-u-boot)