drivers/clk/sunxi-ng/ccu_common.h

   1 /*
   2  * Copyright (c) 2016 Maxime Ripard. All rights reserved.
   3  *
   4  * This software is licensed under the terms of the GNU General Public
   5  * License version 2, as published by the Free Software Foundation, and
   6  * may be copied, distributed, and modified under those terms.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #ifndef _COMMON_H_
  15 #define _COMMON_H_
  16
  17 #include <linux/compiler.h>
  18 #include <linux/clk-provider.h>
  19
  20 #define CCU_FEATURE_FRACTIONAL          BIT(0)
  21 #define CCU_FEATURE_VARIABLE_PREDIV     BIT(1)
  22 #define CCU_FEATURE_FIXED_PREDIV        BIT(2)
  23 #define CCU_FEATURE_FIXED_POSTDIV       BIT(3)
  24 #define CCU_FEATURE_ALL_PREDIV          BIT(4)
  25 #define CCU_FEATURE_LOCK_REG            BIT(5)
  26 #define CCU_FEATURE_MMC_TIMING_SWITCH   BIT(6)
  27 #define CCU_FEATURE_SIGMA_DELTA_MOD     BIT(7)
  28
  29 /* MMC timing mode switch bit */
  30 #define CCU_MMC_NEW_TIMING_MODE         BIT(30)
  31
  32 struct device_node;
  33
  34 struct ccu_common {
  35         void __iomem    *base;
  36         u16             reg;
  37         u16             lock_reg;
  38         u32             prediv;
  39
  40         unsigned long   features;
  41         spinlock_t      *lock;
  42         struct clk_hw   hw;
  43 };
  44
  45 static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw)
  46 {
  47         return container_of(hw, struct ccu_common, hw);
  48 }
  49
  50 struct sunxi_ccu_desc {
  51         struct ccu_common               **ccu_clks;
  52         unsigned long                   num_ccu_clks;
  53
  54         struct clk_hw_onecell_data      *hw_clks;
  55
  56         struct ccu_reset_map            *resets;
  57         unsigned long                   num_resets;
  58 };
  59
  60 void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock);
  61
  62 struct ccu_pll_nb {
  63         struct notifier_block   clk_nb;
  64         struct ccu_common       *common;
  65
  66         u32     enable;
  67         u32     lock;
  68 };
  69
  70 #define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb)
  71
  72 int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb);
  73
  74 int sunxi_ccu_probe(struct device_node *node, void __iomem *reg,
  75                     const struct sunxi_ccu_desc *desc);
  76
  77 #endif /* _COMMON_H_ */