[PATCH 2/5] omap: Use inituart to configure the debug serial port based on machine ID

* Grazvydas Ignotas [off-list ref] [110204 04:03]:

On Fri, Feb 4, 2011 at 3:27 AM, Tony Lindgren [off-list ref] wrote:

quoted

Set the debug serial port based on machine ID. Note that most
of the patch is just trivial checking for the machine ID.

..
 

This looks a bit wasteful not only because of repeated CMPs, but also
LDRs are generating a large literal pool. Maybe something like that be
better:

    adr     r0, uart3_machines
0:
    ldrh    \v, [r0], #2
    tst     \v, \v
    beq     999f                    @ end of list
    cmp     \id, \v
    bne     0b
    ldr     \v, =OMAP3_UART3_BASE
    str     \v, [\a, #0]            @ save port phys addr
    ldr     \v, =(OMAP3_UART3_BASE + OMAP2_L4_IO_OFFSET)
    str     \v, [\a, #4]            @ save port virt addr
    b       999f

    uart3_machines:
    .short MACH_TYPE_CM_T35
    .short MACH_TYPE_CM_T3517
    ...
    .short 0

of course this needs an extra register..

Hmm, addruart and busyuart are limited with registers, but
inituart may not be. I'll take a look if that can be done.

Regards,

Tony