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 #define CCU_FEATURE_IOSC_CALIBRATION BIT(12) 25 26 /* MMC timing mode switch bit */ 27 #define CCU_MMC_NEW_TIMING_MODE BIT(30) 28 29 /* Some clocks need this bit to actually apply register changes */ 30 #define CCU_SUNXI_UPDATE_BIT BIT(27) 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 min_rate; 41 unsigned long max_rate; 42 43 unsigned long features; 44 spinlock_t *lock; 45 struct clk_hw hw; 46 }; 47 48 static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw) 49 { 50 return container_of(hw, struct ccu_common, hw); 51 } 52 53 struct sunxi_ccu_desc { 54 struct ccu_common **ccu_clks; 55 unsigned long num_ccu_clks; 56 57 struct clk_hw_onecell_data *hw_clks; 58 59 const struct ccu_reset_map *resets; 60 unsigned long num_resets; 61 }; 62 63 void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock); 64 65 bool ccu_is_better_rate(struct ccu_common *common, 66 unsigned long target_rate, 67 unsigned long current_rate, 68 unsigned long best_rate); 69 70 struct ccu_pll_nb { 71 struct notifier_block clk_nb; 72 struct ccu_common *common; 73 74 u32 enable; 75 u32 lock; 76 }; 77 78 #define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb) 79 80 int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb); 81 82 int devm_sunxi_ccu_probe(struct device *dev, void __iomem *reg, 83 const struct sunxi_ccu_desc *desc); 84 void of_sunxi_ccu_probe(struct device_node *node, void __iomem *reg, 85 const struct sunxi_ccu_desc *desc); 86 87 #endif /* _COMMON_H_ */ 88