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// SPDX-License-Identifier: GPL-2.0
//
// Spreadtrum divider clock driver
//
// Copyright (C) 2017 Spreadtrum, Inc.
// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
#include <linux/clk-provider.h>
#include "div.h"
static long sprd_div_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct sprd_div *cd = hw_to_sprd_div(hw);
return divider_round_rate(&cd->common.hw, rate, parent_rate, NULL,
cd->div.width, 0);
}
unsigned long sprd_div_helper_recalc_rate(struct sprd_clk_common *common,
const struct sprd_div_internal *div,
unsigned long parent_rate)
{
unsigned long val;
unsigned int reg;
regmap_read(common->regmap, common->reg, ®);
val = reg >> div->shift;
val &= (1 << div->width) - 1;
return divider_recalc_rate(&common->hw, parent_rate, val, NULL, 0,
div->width);
}
EXPORT_SYMBOL_GPL(sprd_div_helper_recalc_rate);
static unsigned long sprd_div_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct sprd_div *cd = hw_to_sprd_div(hw);
return sprd_div_helper_recalc_rate(&cd->common, &cd->div, parent_rate);
}
int sprd_div_helper_set_rate(const struct sprd_clk_common *common,
const struct sprd_div_internal *div,
unsigned long rate,
unsigned long parent_rate)
{
unsigned long val;
unsigned int reg;
val = divider_get_val(rate, parent_rate, NULL,
div->width, 0);
regmap_read(common->regmap, common->reg, ®);
reg &= ~GENMASK(div->width + div->shift - 1, div->shift);
regmap_write(common->regmap, common->reg,
reg | (val << div->shift));
return 0;
}
EXPORT_SYMBOL_GPL(sprd_div_helper_set_rate);
static int sprd_div_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct sprd_div *cd = hw_to_sprd_div(hw);
return sprd_div_helper_set_rate(&cd->common, &cd->div,
rate, parent_rate);
}
const struct clk_ops sprd_div_ops = {
.recalc_rate = sprd_div_recalc_rate,
.round_rate = sprd_div_round_rate,
.set_rate = sprd_div_set_rate,
};
EXPORT_SYMBOL_GPL(sprd_div_ops);
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