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