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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
*/
#include <linux/kernel.h>
#include <linux/bitops.h>
#include <linux/regmap.h>
#include <linux/export.h>
#include "clk-regmap-divider.h"
static inline struct clk_regmap_div *to_clk_regmap_div(struct clk_hw *hw)
{
return container_of(to_clk_regmap(hw), struct clk_regmap_div, clkr);
}
static int div_ro_determine_rate(struct clk_hw *hw,
struct clk_rate_request *req)
{
struct clk_regmap_div *divider = to_clk_regmap_div(hw);
struct clk_regmap *clkr = ÷r->clkr;
u32 val;
regmap_read(clkr->regmap, divider->reg, &val);
val >>= divider->shift;
val &= BIT(divider->width) - 1;
return divider_ro_determine_rate(hw, req, NULL, divider->width,
CLK_DIVIDER_ROUND_CLOSEST, val);
}
static int div_determine_rate(struct clk_hw *hw, struct clk_rate_request *req)
{
struct clk_regmap_div *divider = to_clk_regmap_div(hw);
return divider_determine_rate(hw, req, NULL, divider->width,
CLK_DIVIDER_ROUND_CLOSEST);
}
static int div_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_regmap_div *divider = to_clk_regmap_div(hw);
struct clk_regmap *clkr = ÷r->clkr;
u32 div;
div = divider_get_val(rate, parent_rate, NULL, divider->width,
CLK_DIVIDER_ROUND_CLOSEST);
return regmap_update_bits(clkr->regmap, divider->reg,
(BIT(divider->width) - 1) << divider->shift,
div << divider->shift);
}
static unsigned long div_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_regmap_div *divider = to_clk_regmap_div(hw);
struct clk_regmap *clkr = ÷r->clkr;
u32 div;
regmap_read(clkr->regmap, divider->reg, &div);
div >>= divider->shift;
div &= BIT(divider->width) - 1;
return divider_recalc_rate(hw, parent_rate, div, NULL,
CLK_DIVIDER_ROUND_CLOSEST, divider->width);
}
const struct clk_ops clk_regmap_div_ops = {
.determine_rate = div_determine_rate,
.set_rate = div_set_rate,
.recalc_rate = div_recalc_rate,
};
EXPORT_SYMBOL_GPL(clk_regmap_div_ops);
const struct clk_ops clk_regmap_div_ro_ops = {
.determine_rate = div_ro_determine_rate,
.recalc_rate = div_recalc_rate,
};
EXPORT_SYMBOL_GPL(clk_regmap_div_ro_ops);
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