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 #define CCU_FEATURE_KEY_FIELD BIT(8) 21 #define CCU_FEATURE_CLOSEST_RATE BIT(9) 22 23 /* MMC timing mode switch bit */ 24 #define CCU_MMC_NEW_TIMING_MODE BIT(30) 25 26 struct device_node; 27 28 struct ccu_common { 29 void __iomem *base; 30 u16 reg; 31 u16 lock_reg; 32 u32 prediv; 33 34 unsigned long min_rate; 35 unsigned long max_rate; 36 37 unsigned long features; 38 spinlock_t *lock; 39 struct clk_hw hw; 40 }; 41 42 static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw) 43 { 44 return container_of(hw, struct ccu_common, hw); 45 } 46 47 struct sunxi_ccu_desc { 48 struct ccu_common **ccu_clks; 49 unsigned long num_ccu_clks; 50 51 struct clk_hw_onecell_data *hw_clks; 52 53 struct ccu_reset_map *resets; 54 unsigned long num_resets; 55 }; 56 57 void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock); 58 59 bool ccu_is_better_rate(struct ccu_common *common, 60 unsigned long target_rate, 61 unsigned long current_rate, 62 unsigned long best_rate); 63 64 struct ccu_pll_nb { 65 struct notifier_block clk_nb; 66 struct ccu_common *common; 67 68 u32 enable; 69 u32 lock; 70 }; 71 72 #define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb) 73 74 int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb); 75 76 int devm_sunxi_ccu_probe(struct device *dev, void __iomem *reg, 77 const struct sunxi_ccu_desc *desc); 78 void of_sunxi_ccu_probe(struct device_node *node, void __iomem *reg, 79 const struct sunxi_ccu_desc *desc); 80 81 #endif /* _COMMON_H_ */ 82