205 lines
5.4 KiB
C
205 lines
5.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2014 MediaTek Inc.
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* Author: James Liao <jamesjj.liao@mediatek.com>
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*/
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#ifndef __DRV_CLK_MTK_H
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#define __DRV_CLK_MTK_H
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#include <linux/clk-provider.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include "reset.h"
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#define MAX_MUX_GATE_BIT 31
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#define INVALID_MUX_GATE_BIT (MAX_MUX_GATE_BIT + 1)
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#define MHZ (1000 * 1000)
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struct platform_device;
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struct mtk_fixed_clk {
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int id;
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const char *name;
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const char *parent;
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unsigned long rate;
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};
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#define FIXED_CLK(_id, _name, _parent, _rate) { \
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.id = _id, \
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.name = _name, \
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.parent = _parent, \
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.rate = _rate, \
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}
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int mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks, int num,
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struct clk_hw_onecell_data *clk_data);
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void mtk_clk_unregister_fixed_clks(const struct mtk_fixed_clk *clks, int num,
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struct clk_hw_onecell_data *clk_data);
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struct mtk_fixed_factor {
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int id;
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const char *name;
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const char *parent_name;
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int mult;
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int div;
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};
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#define FACTOR(_id, _name, _parent, _mult, _div) { \
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.id = _id, \
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.name = _name, \
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.parent_name = _parent, \
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.mult = _mult, \
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.div = _div, \
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}
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int mtk_clk_register_factors(const struct mtk_fixed_factor *clks, int num,
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struct clk_hw_onecell_data *clk_data);
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void mtk_clk_unregister_factors(const struct mtk_fixed_factor *clks, int num,
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struct clk_hw_onecell_data *clk_data);
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struct mtk_composite {
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int id;
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const char *name;
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const char * const *parent_names;
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const char *parent;
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unsigned flags;
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uint32_t mux_reg;
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uint32_t divider_reg;
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uint32_t gate_reg;
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signed char mux_shift;
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signed char mux_width;
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signed char gate_shift;
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signed char divider_shift;
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signed char divider_width;
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u8 mux_flags;
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signed char num_parents;
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};
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#define MUX_GATE_FLAGS_2(_id, _name, _parents, _reg, _shift, \
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_width, _gate, _flags, _muxflags) { \
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.id = _id, \
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.name = _name, \
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.mux_reg = _reg, \
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.mux_shift = _shift, \
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.mux_width = _width, \
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.gate_reg = _reg, \
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.gate_shift = _gate, \
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.divider_shift = -1, \
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.parent_names = _parents, \
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.num_parents = ARRAY_SIZE(_parents), \
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.flags = _flags, \
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.mux_flags = _muxflags, \
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}
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/*
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* In case the rate change propagation to parent clocks is undesirable,
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* this macro allows to specify the clock flags manually.
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*/
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#define MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, \
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_gate, _flags) \
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MUX_GATE_FLAGS_2(_id, _name, _parents, _reg, \
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_shift, _width, _gate, _flags, 0)
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/*
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* Unless necessary, all MUX_GATE clocks propagate rate changes to their
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* parent clock by default.
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*/
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#define MUX_GATE(_id, _name, _parents, _reg, _shift, _width, _gate) \
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MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, \
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_gate, CLK_SET_RATE_PARENT)
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#define MUX(_id, _name, _parents, _reg, _shift, _width) \
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MUX_FLAGS(_id, _name, _parents, _reg, \
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_shift, _width, CLK_SET_RATE_PARENT)
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#define MUX_FLAGS(_id, _name, _parents, _reg, _shift, _width, _flags) { \
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.id = _id, \
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.name = _name, \
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.mux_reg = _reg, \
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.mux_shift = _shift, \
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.mux_width = _width, \
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.gate_shift = -1, \
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.divider_shift = -1, \
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.parent_names = _parents, \
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.num_parents = ARRAY_SIZE(_parents), \
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.flags = _flags, \
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}
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#define DIV_GATE(_id, _name, _parent, _gate_reg, _gate_shift, _div_reg, \
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_div_width, _div_shift) { \
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.id = _id, \
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.parent = _parent, \
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.name = _name, \
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.divider_reg = _div_reg, \
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.divider_shift = _div_shift, \
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.divider_width = _div_width, \
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.gate_reg = _gate_reg, \
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.gate_shift = _gate_shift, \
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.mux_shift = -1, \
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.flags = 0, \
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}
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int mtk_clk_register_composites(const struct mtk_composite *mcs, int num,
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void __iomem *base, spinlock_t *lock,
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struct clk_hw_onecell_data *clk_data);
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void mtk_clk_unregister_composites(const struct mtk_composite *mcs, int num,
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struct clk_hw_onecell_data *clk_data);
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struct mtk_clk_divider {
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int id;
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const char *name;
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const char *parent_name;
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unsigned long flags;
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u32 div_reg;
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unsigned char div_shift;
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unsigned char div_width;
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unsigned char clk_divider_flags;
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const struct clk_div_table *clk_div_table;
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};
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#define DIV_ADJ(_id, _name, _parent, _reg, _shift, _width) { \
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.id = _id, \
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.name = _name, \
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.parent_name = _parent, \
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.div_reg = _reg, \
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.div_shift = _shift, \
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.div_width = _width, \
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}
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int mtk_clk_register_dividers(const struct mtk_clk_divider *mcds, int num,
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void __iomem *base, spinlock_t *lock,
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struct clk_hw_onecell_data *clk_data);
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void mtk_clk_unregister_dividers(const struct mtk_clk_divider *mcds, int num,
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struct clk_hw_onecell_data *clk_data);
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struct clk_hw_onecell_data *mtk_alloc_clk_data(unsigned int clk_num);
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struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
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unsigned int clk_num);
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void mtk_free_clk_data(struct clk_hw_onecell_data *clk_data);
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struct clk_hw *mtk_clk_register_ref2usb_tx(const char *name,
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const char *parent_name, void __iomem *reg);
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void mtk_clk_unregister_ref2usb_tx(struct clk_hw *hw);
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struct mtk_clk_desc {
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const struct mtk_gate *clks;
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size_t num_clks;
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const struct mtk_clk_rst_desc *rst_desc;
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};
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int mtk_clk_simple_probe(struct platform_device *pdev);
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int mtk_clk_simple_remove(struct platform_device *pdev);
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#endif /* __DRV_CLK_MTK_H */
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