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 #define CCU_FEATURE_DUAL_DIV BIT(10) 23 #define CCU_FEATURE_UPDATE_BIT BIT(11) 24 25 /* MMC timing mode switch bit */ 26 #define CCU_MMC_NEW_TIMING_MODE BIT(30) 27 28 /* Some clocks need this bit to actually apply register changes */ 29 #define CCU_SUNXI_UPDATE_BIT BIT(27) 30 31 struct device_node; 32 33 struct ccu_common { 34 void __iomem *base; 35 u16 reg; 36 u16 lock_reg; 37 u32 prediv; 38 39 unsigned long min_rate; 40 unsigned long max_rate; 41 42 unsigned long features; 43 spinlock_t *lock; 44 struct clk_hw hw; 45 }; 46 47 static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw) 48 { 49 return container_of(hw, struct ccu_common, hw); 50 } 51 52 struct sunxi_ccu_desc { 53 struct ccu_common **ccu_clks; 54 unsigned long num_ccu_clks; 55 56 struct clk_hw_onecell_data *hw_clks; 57 58 const struct ccu_reset_map *resets; 59 unsigned long num_resets; 60 }; 61 62 void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock); 63 64 bool ccu_is_better_rate(struct ccu_common *common, 65 unsigned long target_rate, 66 unsigned long current_rate, 67 unsigned long best_rate); 68 69 struct ccu_pll_nb { 70 struct notifier_block clk_nb; 71 struct ccu_common *common; 72 73 u32 enable; 74 u32 lock; 75 }; 76 77 #define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb) 78 79 int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb); 80 81 int devm_sunxi_ccu_probe(struct device *dev, void __iomem *reg, 82 const struct sunxi_ccu_desc *desc); 83 void of_sunxi_ccu_probe(struct device_node *node, void __iomem *reg, 84 const struct sunxi_ccu_desc *desc); 85 86 #endif /* _COMMON_H_ */ 87