LXR linux/drivers/clk/actions/owl-pll.h

   1// SPDX-License-Identifier: GPL-2.0+
   2//
   3// OWL pll clock driver
   4//
   5// Copyright (c) 2014 Actions Semi Inc.
   6// Author: David Liu <liuwei@actions-semi.com>
   7//
   8// Copyright (c) 2018 Linaro Ltd.
   9// Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
  10
  11#ifndef _OWL_PLL_H_
  12#define _OWL_PLL_H_
  13
  14#include "owl-common.h"
  15
  16/* last entry should have rate = 0 */
  17struct clk_pll_table {
  18        unsigned int            val;
  19        unsigned long           rate;
  20};
  21
  22struct owl_pll_hw {
  23        u32                     reg;
  24        u32                     bfreq;
  25        u8                      bit_idx;
  26        u8                      shift;
  27        u8                      width;
  28        u8                      min_mul;
  29        u8                      max_mul;
  30        const struct clk_pll_table *table;
  31};
  32
  33struct owl_pll {
  34        struct owl_pll_hw       pll_hw;
  35        struct owl_clk_common   common;
  36};
  37
  38#define OWL_PLL_HW(_reg, _bfreq, _bit_idx, _shift,                      \
  39                   _width, _min_mul, _max_mul, _table)                  \
  40        {                                                               \
  41                .reg            = _reg,                                 \
  42                .bfreq          = _bfreq,                               \
  43                .bit_idx        = _bit_idx,                             \
  44                .shift          = _shift,                               \
  45                .width          = _width,                               \
  46                .min_mul        = _min_mul,                             \
  47                .max_mul        = _max_mul,                             \
  48                .table          = _table,                               \
  49        }
  50
  51#define OWL_PLL(_struct, _name, _parent, _reg, _bfreq, _bit_idx,        \
  52                _shift, _width, _min_mul, _max_mul, _table, _flags)     \
  53        struct owl_pll _struct = {                                      \
  54                .pll_hw = OWL_PLL_HW(_reg, _bfreq, _bit_idx, _shift,    \
  55                                     _width, _min_mul,                  \
  56                                     _max_mul, _table),                 \
  57                .common = {                                             \
  58                        .regmap = NULL,                                 \
  59                        .hw.init = CLK_HW_INIT(_name,                   \
  60                                               _parent,                 \
  61                                               &owl_pll_ops,            \
  62                                               _flags),                 \
  63                },                                                      \
  64        }
  65
  66#define OWL_PLL_NO_PARENT(_struct, _name, _reg, _bfreq, _bit_idx,       \
  67                _shift, _width, _min_mul, _max_mul, _table, _flags)     \
  68        struct owl_pll _struct = {                                      \
  69                .pll_hw = OWL_PLL_HW(_reg, _bfreq, _bit_idx, _shift,    \
  70                                     _width, _min_mul,                  \
  71                                     _max_mul, _table),                 \
  72                .common = {                                             \
  73                        .regmap = NULL,                                 \
  74                        .hw.init = CLK_HW_INIT_NO_PARENT(_name,         \
  75                                               &owl_pll_ops,            \
  76                                               _flags),                 \
  77                },                                                      \
  78        }
  79
  80#define mul_mask(m)             ((1 << ((m)->width)) - 1)
  81#define PLL_STABILITY_WAIT_US   (50)
  82
  83static inline struct owl_pll *hw_to_owl_pll(const struct clk_hw *hw)
  84{
  85        struct owl_clk_common *common = hw_to_owl_clk_common(hw);
  86
  87        return container_of(common, struct owl_pll, common);
  88}
  89
  90extern const struct clk_ops owl_pll_ops;
  91
  92#endif /* _OWL_PLL_H_ */
  93