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- /*
- * Copyright (c) 2014, The Linux Foundation. All rights reserved.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
- #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 long div_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
- {
- struct clk_regmap_div *divider = to_clk_regmap_div(hw);
- return divider_round_rate(hw, rate, prate, 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);
- }
- const struct clk_ops clk_regmap_div_ops = {
- .round_rate = div_round_rate,
- .set_rate = div_set_rate,
- .recalc_rate = div_recalc_rate,
- };
- EXPORT_SYMBOL_GPL(clk_regmap_div_ops);
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