tree 849b02f8d898532ac8322a723ac6b754217ef780
parent ac3b5d8ef95753f59e817e25c8090b325cbfd151
author Roger Quadros <rogerq@ti.com> 1581328764 +0200
committer Lokesh Vutla <lokeshvutla@ti.com> 1581610158 +0530

board: ti: am57xx-idk: Prevent boot for invalid configuation

On am571x-idk there can be following configurations based on Jumper J51
and LCD panel detected.

1) J51 removed (6port): 6 port Ethernet. Disable LCD panel.
2) J51 placed (LCD) + Panel detected: 4 port Ethernet with appropriate LCD.
3) J51 placed (LCD) + Panel not detected/not supported.

Configuration 3 is considered invalid as we can't use display nor ICSS1
ethernet ports due to hardware muxing. Alert the user to fix the
configuration and prevent boot.

Alternative was to allow boot and limit to 4 port Ethernet with no display
but this involved introduction of another DTB for the kernel and was
considered not worth the hassle.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>