40 lines
879 B
C
40 lines
879 B
C
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/*
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* Copyright (C) 2012 ST Microelectronics
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* Viresh Kumar <vireshk@kernel.org>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*
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* SPEAr clk - Common routines
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*/
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#include <linux/clk-provider.h>
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#include <linux/types.h>
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#include "clk.h"
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long clk_round_rate_index(struct clk_hw *hw, unsigned long drate,
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unsigned long parent_rate, clk_calc_rate calc_rate, u8 rtbl_cnt,
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int *index)
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{
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unsigned long prev_rate, rate = 0;
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for (*index = 0; *index < rtbl_cnt; (*index)++) {
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prev_rate = rate;
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rate = calc_rate(hw, parent_rate, *index);
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if (drate < rate) {
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/* previous clock was best */
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if (*index) {
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rate = prev_rate;
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(*index)--;
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}
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break;
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}
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}
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if ((*index) == rtbl_cnt)
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(*index)--;
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return rate;
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}
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