mx25: fix clock's calculation

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* get_rate_arm : when 400MHz clock is selected (cctl & 1<<14),
ARM clock is 400MHz (MPLL * 3 / 4) and not 800MHz
* get_rate_per : peripherals's clock is derived from AHB and not
from IPG (ref manual : figure 5-1)
* can2_clk : use the correct ID

* without this patch, peripherals getting their clock from PER
clocks work fine because of the 2 errors which fix themselves
(ARM clock x 2 and per clock actually based on IPG which is AHB/2)
but flexcan can't work as it gets its clock from IPG and thus
calculates its bitrate using a reference value which is twice
what it really is.

Signed-off-by: Eric Bénard <eric@eukrea.com>

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Eric Bénard 2010-10-12 19:26:34 +02:00 • committed by Sascha Hauer

parent 6136a6ddc9

commit e482b3bee6

1 changed files with 3 additions and 3 deletions

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arch/arm/mach-mx25/clock.c

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