9a61f813fc
The function mux_get_parent() uses qcom_find_src_index() to find the
parent clock index, which is incorrect: qcom_find_src_index() uses src
enum for the lookup, while mux_get_parent() should use cfg field (which
corresponds to the register value). Add qcom_find_cfg_index() function
doing this kind of lookup and use it for mux parent lookup.
Fixes: df96401649 ("clk: qcom: add parent map for regmap mux")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211115233407.1046179-1-dmitry.baryshkov@linaro.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
// 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-mux.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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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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};
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EXPORT_SYMBOL_GPL(clk_regmap_mux_closest_ops);
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