beagleboard: Update comment in get_board_rev()

We are able to tell the difference between xM Rev Ax/Bx and xM Rev Cx,
and have been for some time.  The comment above the function however did
not list this, so update.

Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2013-04-16 16:31:20 -04:00
parent 2335b653d1
commit 8ce4e5f932

View File

@ -108,13 +108,14 @@ int board_init(void)
/*
* Routine: get_board_revision
* Description: Detect if we are running on a Beagle revision Ax/Bx,
* C1/2/3, C4 or xM. This can be done by reading
* C1/2/3, C4, xM Ax/Bx or xM Cx. This can be done by reading
* the level of GPIO173, GPIO172 and GPIO171. This should
* result in
* GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx
* GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3
* GPIO173, GPIO172, GPIO171: 1 0 1 => C4
* GPIO173, GPIO172, GPIO171: 0 0 0 => xM
* GPIO173, GPIO172, GPIO171: 0 1 0 => xM Cx
* GPIO173, GPIO172, GPIO171: 0 0 0 => xM Ax/Bx
*/
static int get_board_revision(void)
{