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_TABLE(_struct, _name, _parents, _table,            \
  40                                     _reg, _shift, _width,              \
  41                                     _flags)                            \
  42        struct sprd_mux _struct = {                                     \
  43                .mux    = _SPRD_MUX_CLK(_shift, _width, _table),        \
  44                .common = {                                             \
  45                        .regmap         = NULL,                         \
  46                        .reg            = _reg,                         \
  47                        .hw.init = CLK_HW_INIT_PARENTS(_name,           \
  48                                                       _parents,        \
  49                                                       &sprd_mux_ops,   \
  50                                                       _flags),         \
  51                }                                                       \
  52        }
  53
  54#define SPRD_MUX_CLK(_struct, _name, _parents, _reg,            \
  55                     _shift, _width, _flags)                    \
  56        SPRD_MUX_CLK_TABLE(_struct, _name, _parents, NULL,      \
  57                           _reg, _shift, _width, _flags)
  58
  59static inline struct sprd_mux *hw_to_sprd_mux(const struct clk_hw *hw)
  60{
  61        struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);
  62
  63        return container_of(common, struct sprd_mux, common);
  64}
  65
  66extern const struct clk_ops sprd_mux_ops;
  67
  68u8 sprd_mux_helper_get_parent(const struct sprd_clk_common *common,
  69                              const struct sprd_mux_ssel *mux);
  70int sprd_mux_helper_set_parent(const struct sprd_clk_common *common,
  71                               const struct sprd_mux_ssel *mux,
  72                               u8 index);
  73
  74#endif /* _SPRD_MUX_H_ */
  75