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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c0ce317f0c
The 3rd argument of regmap_read() takes a pointer to unsigned int. This driver is saved just because u32 happens to be typedef'ed as unsigned int, but we should not rely on that fact. Change the variable type just in case. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/*
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* Copyright (C) 2016 Socionext Inc.
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* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk-provider.h>
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#include <linux/device.h>
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#include <linux/regmap.h>
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#include "clk-uniphier.h"
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struct uniphier_clk_mux {
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struct clk_hw hw;
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struct regmap *regmap;
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unsigned int reg;
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const unsigned int *masks;
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const unsigned int *vals;
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};
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#define to_uniphier_clk_mux(_hw) container_of(_hw, struct uniphier_clk_mux, hw)
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static int uniphier_clk_mux_set_parent(struct clk_hw *hw, u8 index)
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{
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struct uniphier_clk_mux *mux = to_uniphier_clk_mux(hw);
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return regmap_write_bits(mux->regmap, mux->reg, mux->masks[index],
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mux->vals[index]);
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}
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static u8 uniphier_clk_mux_get_parent(struct clk_hw *hw)
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{
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struct uniphier_clk_mux *mux = to_uniphier_clk_mux(hw);
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int num_parents = clk_hw_get_num_parents(hw);
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int ret;
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unsigned int val;
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u8 i;
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ret = regmap_read(mux->regmap, mux->reg, &val);
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if (ret)
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return ret;
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for (i = 0; i < num_parents; i++)
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if ((mux->masks[i] & val) == mux->vals[i])
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return i;
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return -EINVAL;
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}
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static const struct clk_ops uniphier_clk_mux_ops = {
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.determine_rate = __clk_mux_determine_rate,
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.set_parent = uniphier_clk_mux_set_parent,
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.get_parent = uniphier_clk_mux_get_parent,
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};
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struct clk_hw *uniphier_clk_register_mux(struct device *dev,
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struct regmap *regmap,
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const char *name,
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const struct uniphier_clk_mux_data *data)
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{
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struct uniphier_clk_mux *mux;
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struct clk_init_data init;
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int ret;
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mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL);
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if (!mux)
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return ERR_PTR(-ENOMEM);
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init.name = name;
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init.ops = &uniphier_clk_mux_ops;
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init.flags = CLK_SET_RATE_PARENT;
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init.parent_names = data->parent_names;
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init.num_parents = data->num_parents,
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mux->regmap = regmap;
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mux->reg = data->reg;
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mux->masks = data->masks;
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mux->vals = data->vals;
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mux->hw.init = &init;
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ret = devm_clk_hw_register(dev, &mux->hw);
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if (ret)
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return ERR_PTR(ret);
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return &mux->hw;
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}
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