drivers/clk/uniphier/clk-uniphier.h

   1 /*
   2  * Copyright (C) 2016 Socionext Inc.
   3  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef __CLK_UNIPHIER_H__
   9 #define __CLK_UNIPHIER_H__
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13
  14 #define UNIPHIER_CLK_MUX_MAX_PARENTS            8
  15
  16 #define UNIPHIER_CLK_TYPE_END                   0
  17 #define UNIPHIER_CLK_TYPE_FIXED_RATE            2
  18 #define UNIPHIER_CLK_TYPE_GATE                  3
  19 #define UNIPHIER_CLK_TYPE_MUX                   4
  20
  21 #define UNIPHIER_CLK_ID_INVALID                 (U8_MAX)
  22
  23 struct uniphier_clk_fixed_rate_data {
  24         unsigned long fixed_rate;
  25 };
  26
  27 struct uniphier_clk_gate_data {
  28         u8 parent_id;
  29         u16 reg;
  30         u8 bit;
  31 };
  32
  33 struct uniphier_clk_mux_data {
  34         u8 parent_ids[UNIPHIER_CLK_MUX_MAX_PARENTS];
  35         u8 num_parents;
  36         u16 reg;
  37         u32 masks[UNIPHIER_CLK_MUX_MAX_PARENTS];
  38         u32 vals[UNIPHIER_CLK_MUX_MAX_PARENTS];
  39 };
  40
  41 struct uniphier_clk_data {
  42         u8 type;
  43         u8 id;
  44         union {
  45                 struct uniphier_clk_fixed_rate_data rate;
  46                 struct uniphier_clk_gate_data gate;
  47                 struct uniphier_clk_mux_data mux;
  48         } data;
  49 };
  50
  51 #define UNIPHIER_CLK_RATE(_id, _rate)                           \
  52         {                                                       \
  53                 .type = UNIPHIER_CLK_TYPE_FIXED_RATE,           \
  54                 .id = (_id),                                    \
  55                 .data.rate = {                                  \
  56                         .fixed_rate = (_rate),                  \
  57                 },                                              \
  58         }
  59
  60 #define UNIPHIER_CLK_GATE(_id, _parent, _reg, _bit)             \
  61         {                                                       \
  62                 .type = UNIPHIER_CLK_TYPE_GATE,                 \
  63                 .id = (_id),                                    \
  64                 .data.gate = {                                  \
  65                         .parent_id = (_parent),                 \
  66                         .reg = (_reg),                          \
  67                         .bit = (_bit),                          \
  68                 },                                              \
  69         }
  70
  71 #define UNIPHIER_CLK_GATE_SIMPLE(_id, _reg, _bit)               \
  72         UNIPHIER_CLK_GATE(_id, UNIPHIER_CLK_ID_INVALID, _reg, _bit)
  73
  74 extern const struct uniphier_clk_data uniphier_pxs2_sys_clk_data[];
  75 extern const struct uniphier_clk_data uniphier_ld20_sys_clk_data[];
  76 extern const struct uniphier_clk_data uniphier_pxs3_sys_clk_data[];
  77 extern const struct uniphier_clk_data uniphier_mio_clk_data[];
  78
  79 #endif /* __CLK_UNIPHIER_H__ */