LXR linux/drivers/clk/sprd/mux.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2//
   3// Spreadtrum multiplexer clock driver
   4//
   5// Copyright (C) 2017 Spreadtrum, Inc.
   6// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
   7
   8#ifndef _SPRD_MUX_H_
   9#define _SPRD_MUX_H_
  10
  11#include "common.h"
  12
  13/**
  14 * struct sprd_mux_ssel - Mux clock's source select bits in its register
  15 * @shift: Bit offset of the divider in its register
  16 * @width: Width of the divider field in its register
  17 * @table: For some mux clocks, not all sources are used on some special
  18 *         chips, this matches the value of mux clock's register and the
  19 *         sources which are used for this mux clock
  20 */
  21struct sprd_mux_ssel {
  22        u8              shift;
  23        u8              width;
  24        const u8        *table;
  25};
  26
  27struct sprd_mux {
  28        struct sprd_mux_ssel mux;
  29        struct sprd_clk_common  common;
  30};
  31
  32#define _SPRD_MUX_CLK(_shift, _width, _table)           \
  33        {                                               \
  34                .shift  = _shift,                       \
  35                .width  = _width,                       \
  36                .table  = _table,                       \
  37        }
  38
  39#define SPRD_MUX_CLK_HW_INIT_FN(_struct, _name, _parents, _table,       \
  40                                _reg, _shift, _width, _flags, _fn)      \
  41        struct sprd_mux _struct = {                                     \
  42                .mux    = _SPRD_MUX_CLK(_shift, _width, _table),        \
  43                .common = {                                             \
  44                        .regmap         = NULL,                         \
  45                        .reg            = _reg,                         \
  46                        .hw.init = _fn(_name, _parents,                 \
  47                                       &sprd_mux_ops, _flags),          \
  48                }                                                       \
  49        }
  50
  51#define SPRD_MUX_CLK_TABLE(_struct, _name, _parents, _table,            \
  52                           _reg, _shift, _width, _flags)                \
  53        SPRD_MUX_CLK_HW_INIT_FN(_struct, _name, _parents, _table,       \
  54                                _reg, _shift, _width, _flags,           \
  55                                CLK_HW_INIT_PARENTS)
  56
  57#define SPRD_MUX_CLK(_struct, _name, _parents, _reg,            \
  58                     _shift, _width, _flags)                    \
  59        SPRD_MUX_CLK_TABLE(_struct, _name, _parents, NULL,      \
  60                           _reg, _shift, _width, _flags)
  61
  62#define SPRD_MUX_CLK_DATA_TABLE(_struct, _name, _parents, _table,       \
  63                                _reg, _shift, _width, _flags)           \
  64        SPRD_MUX_CLK_HW_INIT_FN(_struct, _name, _parents, _table,       \
  65                                _reg, _shift, _width, _flags,           \
  66                                CLK_HW_INIT_PARENTS_DATA)
  67
  68#define SPRD_MUX_CLK_DATA(_struct, _name, _parents, _reg,               \
  69                          _shift, _width, _flags)                       \
  70        SPRD_MUX_CLK_DATA_TABLE(_struct, _name, _parents, NULL,         \
  71                                _reg, _shift, _width, _flags)
  72
  73static inline struct sprd_mux *hw_to_sprd_mux(const struct clk_hw *hw)
  74{
  75        struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);
  76
  77        return container_of(common, struct sprd_mux, common);
  78}
  79
  80extern const struct clk_ops sprd_mux_ops;
  81
  82u8 sprd_mux_helper_get_parent(const struct sprd_clk_common *common,
  83                              const struct sprd_mux_ssel *mux);
  84int sprd_mux_helper_set_parent(const struct sprd_clk_common *common,
  85                               const struct sprd_mux_ssel *mux,
  86                               u8 index);
  87
  88#endif /* _SPRD_MUX_H_ */
  89