84 lines
2 KiB
C
84 lines
2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2014, 2019, 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-mux.h"
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#include "clk-debug.h"
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static inline struct clk_regmap_mux *to_clk_regmap_mux(struct clk_hw *hw)
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{
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return container_of(to_clk_regmap(hw), struct clk_regmap_mux, clkr);
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}
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static u8 mux_get_parent(struct clk_hw *hw)
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{
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struct clk_regmap_mux *mux = to_clk_regmap_mux(hw);
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struct clk_regmap *clkr = to_clk_regmap(hw);
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unsigned int mask = GENMASK(mux->width - 1, 0);
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unsigned int val;
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regmap_read(clkr->regmap, mux->reg, &val);
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val >>= mux->shift;
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val &= mask;
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if (mux->parent_map)
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return qcom_find_cfg_index(hw, mux->parent_map, val);
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return val;
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}
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static int mux_set_parent(struct clk_hw *hw, u8 index)
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{
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struct clk_regmap_mux *mux = to_clk_regmap_mux(hw);
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struct clk_regmap *clkr = to_clk_regmap(hw);
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unsigned int mask = GENMASK(mux->width + mux->shift - 1, mux->shift);
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unsigned int val;
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if (mux->parent_map)
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index = mux->parent_map[index].cfg;
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val = index;
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val <<= mux->shift;
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return regmap_update_bits(clkr->regmap, mux->reg, mask, val);
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}
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static void clk_regmap_mux_list_registers(struct seq_file *f, struct clk_hw *hw)
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{
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struct clk_regmap_mux *mux = to_clk_regmap_mux(hw);
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int val;
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regmap_read(mux->clkr.regmap, mux->reg, &val);
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clock_debug_output(f, "%20s: 0x%.8x\n", "MUXR", val);
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}
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static struct clk_regmap_ops clk_regmap_mux_regmap_ops = {
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.list_registers = clk_regmap_mux_list_registers,
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};
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static int clk_regmap_mux_init(struct clk_hw *hw)
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{
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struct clk_regmap *rclk = to_clk_regmap(hw);
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if (!rclk->ops)
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rclk->ops = &clk_regmap_mux_regmap_ops;
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return 0;
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}
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const struct clk_ops clk_regmap_mux_closest_ops = {
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.get_parent = mux_get_parent,
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.set_parent = mux_set_parent,
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.determine_rate = __clk_mux_determine_rate_closest,
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.init = clk_regmap_mux_init,
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.debug_init = clk_common_debug_init,
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};
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EXPORT_SYMBOL_GPL(clk_regmap_mux_closest_ops);
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