/* * Copyright (C) 2012 ST Microelectronics * Viresh Kumar <vireshk@kernel.org> * * 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; }