projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 55b8fd4f VK |
1 | /* |
| 2 | * Copyright (C) 2012 ST Microelectronics | |
| 10d8935f | 3 | * Viresh Kumar <viresh.linux@gmail.com> |
| 55b8fd4f VK |
4 | * |
| 5 | * This file is licensed under the terms of the GNU General Public | |
| 6 | * License version 2. This program is licensed "as is" without any | |
| 7 | * warranty of any kind, whether express or implied. | |
| 8 | * | |
| 9 | * SPEAr clk - Common routines | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/clk-provider.h> | |
| 13 | #include <linux/types.h> | |
| 14 | #include "clk.h" | |
| 15 | ||
| 16 | long clk_round_rate_index(struct clk_hw *hw, unsigned long drate, | |
| 17 | unsigned long parent_rate, clk_calc_rate calc_rate, u8 rtbl_cnt, | |
| 18 | int *index) | |
| 19 | { | |
| 20 | unsigned long prev_rate, rate = 0; | |
| 21 | ||
| 22 | for (*index = 0; *index < rtbl_cnt; (*index)++) { | |
| 23 | prev_rate = rate; | |
| 24 | rate = calc_rate(hw, parent_rate, *index); | |
| 25 | if (drate < rate) { | |
| 26 | /* previous clock was best */ | |
| 27 | if (*index) { | |
| 28 | rate = prev_rate; | |
| 29 | (*index)--; | |
| 30 | } | |
| 31 | break; | |
| 32 | } | |
| 33 | } | |
| 34 | ||
| 1b2d4ad5 DS |
35 | if ((*index) == rtbl_cnt) |
| 36 | (*index)--; | |
| 37 | ||
| 55b8fd4f VK |
38 | return rate; |
| 39 | } |