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ppc4xx: Make pll_write global

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This patch makes pll_write on PPC405EP boards
global and callable from C code.

pll_write can be used to dynamically modify the PLB:PCI divider
as it is required for 33/66 MHz pci adapters based on the 405EP.

board_early_init_f() is a good place to do that (check M66EN signal
and call pll_write() when it is required).

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Matthias Fuchs 2009-07-06 16:27:33 +02:00 • committed by Stefan Roese
parent 20b3c4b528
commit 0580e48f53
1 changed files with 1 additions and 0 deletions
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1
cpu/ppc4xx/start.S
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@ -2021,6 +2021,7 @@ pci_wait:
! Output r3 = none
!-----------------------------------------------------------------------------
*/
.globl pll_write
pll_write:
mfdcr r5, CPC0_UCR
andis. r5,r5,0xFFFF