| commit | e482b3bee66d627356904746c217f8f1bf891e60 | |
| author | Eric Bénard <eric@eukrea.com> | |
| Tue, 12 Oct 2010 17:26:34 +0000 (12 19:26 +0200) | ||
| committer | Sascha Hauer <s.hauer@pengutronix.de> | |
| Tue, 19 Oct 2010 16:44:58 +0000 (19 18:44 +0200) | ||
| tree | 9c6fa60278728972b160a95a014c24e4d7d92697 | treesnapshot (tar.gz zip) |
| parent | 6136a6ddc9db50d909344bb7e6f45dbe631f2e29 | commitdiff |
mx25: fix clock's calculation
* 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>
* 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>
| arch/arm/mach-mx25/clock.c | diffblobblamehistory |