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ecfb9f4047
The previous algorithm was pretty broken.
- The inner loop had a '(m > m_max)' condition, and the value of 'm'
would increase in each iteration;
- Each iteration would actually multiply 'm' by two, so it is not needed
to re-compute the whole equation at each iteration;
- It would loop until (m & 1) == 0, which means it would loop at most
once.
- The outer loop would divide the 'n' value by two at the end of each
iteration. This meant that for a 12 MHz parent clock and a 1.2 GHz
requested clock, it would first try n=12, then n=6, then n=3, then
n=1, none of which would work; the only valid value is n=2 in this
case.
Simplify this algorithm with a single for loop, which decrements 'n'
after each iteration, addressing all of the above problems.
Fixes:
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|---|---|---|
| .. | ||
| cgu.c | ||
| cgu.h | ||
| jz4725b-cgu.c | ||
| jz4740-cgu.c | ||
| jz4755-cgu.c | ||
| jz4760-cgu.c | ||
| jz4770-cgu.c | ||
| jz4780-cgu.c | ||
| Kconfig | ||
| Makefile | ||
| pm.c | ||
| pm.h | ||
| tcu.c | ||
| x1000-cgu.c | ||
| x1830-cgu.c | ||