lkml.org 
[lkml]   [2018]   [Feb]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/3] clk: exynos5433: Extend list of available AUD_PLL output frequencies
On 2018년 02월 07일 22:04, Sylwester Nawrocki wrote:
> On 02/07/2018 12:24 PM, Chanwoo Choi wrote:
>> Could you share your equation?
>> because your result is a little bit different of my result.
>> - my equation : ((mdiv + kdiv/65535) x 24MHz) / (pdiv x POWER(2,sdiv))
>
> It resembles the code from samsung_pll36xx_recalc_rate():
>
> (24 * 10^6 * (M * 2^16 + K)) / (P * 2^S) / 2^16
>
> and a more accurate one
>
> ROUNDDOWN(ROUNDDOWN(24 * 10^6 * (M * 2^16 + K), 0) / ROUNDDOWN(P * 2^S, 0) / 2^16, 0)
>
> Shouldn't you substitute 65535 with 65536?

65536 is right. It is my mistake using 65535.
Thanks for your share.

--
Best Regards,
Chanwoo Choi
Samsung Electronics

\
 
 \ /
  Last update: 2018-02-09 08:26    [W:0.045 / U:8.024 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site