1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2015, 2017-2018, The Linux Foundation. All rights reserved. 4 */ 5 6 #ifndef __QCOM_GDSC_H__ 7 #define __QCOM_GDSC_H__ 8 9 #include <linux/err.h> 10 #include <linux/pm_domain.h> 11 12 struct regmap; 13 struct reset_controller_dev; 14 15 /** 16 * struct gdsc - Globally Distributed Switch Controller 17 * @pd: generic power domain 18 * @regmap: regmap for MMIO accesses 19 * @gdscr: gsdc control register 20 * @gds_hw_ctrl: gds_hw_ctrl register 21 * @cxcs: offsets of branch registers to toggle mem/periph bits in 22 * @cxc_count: number of @cxcs 23 * @pwrsts: Possible powerdomain power states 24 * @resets: ids of resets associated with this gdsc 25 * @reset_count: number of @resets 26 * @rcdev: reset controller 27 */ 28 struct gdsc { 29 struct generic_pm_domain pd; 30 struct generic_pm_domain *parent; 31 struct regmap *regmap; 32 unsigned int gdscr; 33 unsigned int gds_hw_ctrl; 34 unsigned int clamp_io_ctrl; 35 unsigned int *cxcs; 36 unsigned int cxc_count; 37 const u8 pwrsts; 38 /* Powerdomain allowable state bitfields */ 39 #define PWRSTS_OFF BIT(0) 40 #define PWRSTS_RET BIT(1) 41 #define PWRSTS_ON BIT(2) 42 #define PWRSTS_OFF_ON (PWRSTS_OFF | PWRSTS_ON) 43 #define PWRSTS_RET_ON (PWRSTS_RET | PWRSTS_ON) 44 const u8 flags; 45 #define VOTABLE BIT(0) 46 #define CLAMP_IO BIT(1) 47 #define HW_CTRL BIT(2) 48 #define SW_RESET BIT(3) 49 #define AON_RESET BIT(4) 50 #define POLL_CFG_GDSCR BIT(5) 51 #define ALWAYS_ON BIT(6) 52 struct reset_controller_dev *rcdev; 53 unsigned int *resets; 54 unsigned int reset_count; 55 }; 56 57 struct gdsc_desc { 58 struct device *dev; 59 struct gdsc **scs; 60 size_t num; 61 }; 62 63 #ifdef CONFIG_QCOM_GDSC 64 int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *, 65 struct regmap *); 66 void gdsc_unregister(struct gdsc_desc *desc); 67 #else 68 static inline int gdsc_register(struct gdsc_desc *desc, 69 struct reset_controller_dev *rcdev, 70 struct regmap *r) 71 { 72 return -ENOSYS; 73 } 74 75 static inline void gdsc_unregister(struct gdsc_desc *desc) {}; 76 #endif /* CONFIG_QCOM_GDSC */ 77 #endif /* __QCOM_GDSC_H__ */ 78