LXR linux/drivers/clk/sunxi-ng/ccu

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright (c) 2016 Maxime Ripard. All rights reserved.
   4 */
   5
   6#ifndef _COMMON_H_
   7#define _COMMON_H_
   8
   9#include <linux/compiler.h>
  10#include <linux/clk-provider.h>
  11
  12#define CCU_FEATURE_FRACTIONAL          BIT(0)
  13#define CCU_FEATURE_VARIABLE_PREDIV     BIT(1)
  14#define CCU_FEATURE_FIXED_PREDIV        BIT(2)
  15#define CCU_FEATURE_FIXED_POSTDIV       BIT(3)
  16#define CCU_FEATURE_ALL_PREDIV          BIT(4)
  17#define CCU_FEATURE_LOCK_REG            BIT(5)
  18#define CCU_FEATURE_MMC_TIMING_SWITCH   BIT(6)
  19#define CCU_FEATURE_SIGMA_DELTA_MOD     BIT(7)
  20
  21/* MMC timing mode switch bit */
  22#define CCU_MMC_NEW_TIMING_MODE         BIT(30)
  23
  24struct device_node;
  25
  26struct ccu_common {
  27        void __iomem    *base;
  28        u16             reg;
  29        u16             lock_reg;
  30        u32             prediv;
  31
  32        unsigned long   features;
  33        spinlock_t      *lock;
  34        struct clk_hw   hw;
  35};
  36
  37static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw)
  38{
  39        return container_of(hw, struct ccu_common, hw);
  40}
  41
  42struct sunxi_ccu_desc {
  43        struct ccu_common               **ccu_clks;
  44        unsigned long                   num_ccu_clks;
  45
  46        struct clk_hw_onecell_data      *hw_clks;
  47
  48        struct ccu_reset_map            *resets;
  49        unsigned long                   num_resets;
  50};
  51
  52void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock);
  53
  54struct ccu_pll_nb {
  55        struct notifier_block   clk_nb;
  56        struct ccu_common       *common;
  57
  58        u32     enable;
  59        u32     lock;
  60};
  61
  62#define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb)
  63
  64int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb);
  65
  66int sunxi_ccu_probe(struct device_node *node, void __iomem *reg,
  67                    const struct sunxi_ccu_desc *desc);
  68
  69#endif /* _COMMON_H_ */
  70