6 Sep
2019
6 Sep
'19
8:21 p.m.
On Wed, Jul 31, 2019 at 6:46 PM Stefan Mavrodiev stefan@olimex.com wrote:
clock_sun6i.c is used for sun6i, sun8i and sun50i SoC families. PLL1 clock sets the default system clock, defined as: sun6i: 1008000000 sun8i: 1008000000 sun50i: 816000000
With the current calculation, m = 2 and k = 3. Solving for n, this results 28. Solving back: (24MHz * 28 * 3) / 2 = 1008MHz
However if the requested clock is 816, n is 22.66 rounded to 22, which results: (24MHz * 28 * 3) / 2 = 792MHz
Changing k to 4 satisfies both system clocks: (24E6 * 21 * 4) / 2 = 1008MHz (24E6 * 17 * 4) / 2 = 816MHz
Signed-off-by: Stefan Mavrodiev stefan@olimex.com
Acked-by: Jagan Teki jagan@amarulasolutions.com
Need to test on respective sun boards, any results?