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| author | John Ogness <john.ogness@linutronix.de> | 2011-02-22 20:00:47 -0700 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2011-02-22 20:00:47 -0700 |
| commit | ea68c00e2623bb5b001c2117a4dcca4754781b4e (patch) | |
| tree | 02c25b983a7735cd444a525a0b0946dc0be9004a /arch/arm/mach-omap2/dma.c | |
| parent | f5412be599602124d2bdd49947b231dd77c0bf99 (diff) | |
OMAP2/3: clock: fix fint calculation for DPLL_FREQSEL
In OMAP35X TRM Rev 2010-05 Figure 7-18 "DPLL With EMI Reduction
Feature", it is shown that the internal frequency is calculated by
CLK_IN/(N+1). However, the value passed to _dpll_test_fint() is
already "N+1" since Linux is using the values to divide by. In the
technical reference manual, "N" is referring to the divider's register
value (0-127).
During power management testing, it was observed that programming the
wrong jitter correction value can cause the system to become unstable
and eventually crash.
Signed-off-by: John Ogness <john.ogness@linutronix.de>
[paul@pwsan.com: added second paragraph to commit message]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/mach-omap2/dma.c')
0 files changed, 0 insertions, 0 deletions