mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
39 lines
879 B
39 lines
879 B
/* |
|
* Copyright (C) 2012 ST Microelectronics |
|
* Viresh Kumar <[email protected]> |
|
* |
|
* This file is licensed under the terms of the GNU General Public |
|
* License version 2. This program is licensed "as is" without any |
|
* warranty of any kind, whether express or implied. |
|
* |
|
* SPEAr clk - Common routines |
|
*/ |
|
|
|
#include <linux/clk-provider.h> |
|
#include <linux/types.h> |
|
#include "clk.h" |
|
|
|
long clk_round_rate_index(struct clk_hw *hw, unsigned long drate, |
|
unsigned long parent_rate, clk_calc_rate calc_rate, u8 rtbl_cnt, |
|
int *index) |
|
{ |
|
unsigned long prev_rate, rate = 0; |
|
|
|
for (*index = 0; *index < rtbl_cnt; (*index)++) { |
|
prev_rate = rate; |
|
rate = calc_rate(hw, parent_rate, *index); |
|
if (drate < rate) { |
|
/* previous clock was best */ |
|
if (*index) { |
|
rate = prev_rate; |
|
(*index)--; |
|
} |
|
break; |
|
} |
|
} |
|
|
|
if ((*index) == rtbl_cnt) |
|
(*index)--; |
|
|
|
return rate; |
|
}
|
|
|