cregit-Linux how code gets into the kernel

Release 4.7 drivers/clk/qcom/clk-regmap-mux.c

Directory: drivers/clk/qcom
/*
 * 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-mux.h"


static inline struct clk_regmap_mux *to_clk_regmap_mux(struct clk_hw *hw) { return container_of(to_clk_regmap(hw), struct clk_regmap_mux, clkr); }

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static u8 mux_get_parent(struct clk_hw *hw) { struct clk_regmap_mux *mux = to_clk_regmap_mux(hw); struct clk_regmap *clkr = to_clk_regmap(hw); unsigned int mask = GENMASK(mux->width - 1, 0); unsigned int val; regmap_read(clkr->regmap, mux->reg, &val); val >>= mux->shift; val &= mask; return val; }

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static int mux_set_parent(struct clk_hw *hw, u8 index) { struct clk_regmap_mux *mux = to_clk_regmap_mux(hw); struct clk_regmap *clkr = to_clk_regmap(hw); unsigned int mask = GENMASK(mux->width + mux->shift - 1, mux->shift); unsigned int val; val = index; val <<= mux->shift; return regmap_update_bits(clkr->regmap, mux->reg, mask, val); }

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const struct clk_ops clk_regmap_mux_closest_ops = { .get_parent = mux_get_parent, .set_parent = mux_set_parent, .determine_rate = __clk_mux_determine_rate_closest, }; EXPORT_SYMBOL_GPL(clk_regmap_mux_closest_ops);

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Directory: drivers/clk/qcom
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