drivers/clk/sunxi-ng/ccu_common.h

   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
  24 struct device_node;
  25
  26 struct 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
  37 static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw)
  38 {
  39         return container_of(hw, struct ccu_common, hw);
  40 }
  41
  42 struct 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
  52 void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock);
  53
  54 struct 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
  64 int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb);
  65
  66 int sunxi_ccu_probe(struct device_node *node, void __iomem *reg,
  67                     const struct sunxi_ccu_desc *desc);
  68
  69 #endif /* _COMMON_H_ */