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 regulator; 14 struct reset_controller_dev; 15 16 /** 17 * struct gdsc - Globally Distributed Switch Controller 18 * @pd: generic power domain 19 * @regmap: regmap for MMIO accesses 20 * @gdscr: gsdc control register 21 * @gds_hw_ctrl: gds_hw_ctrl register 22 * @cxcs: offsets of branch registers to toggle mem/periph bits in 23 * @cxc_count: number of @cxcs 24 * @pwrsts: Possible powerdomain power states 25 * @resets: ids of resets associated with this gdsc 26 * @reset_count: number of @resets 27 * @rcdev: reset controller 28 * @dev: the device holding the GDSC, used for pm_runtime calls 29 */ 30 struct gdsc { 31 struct generic_pm_domain pd; 32 struct generic_pm_domain *parent; 33 struct regmap *regmap; 34 unsigned int gdscr; 35 unsigned int gds_hw_ctrl; 36 unsigned int clamp_io_ctrl; 37 unsigned int *cxcs; 38 unsigned int cxc_count; 39 const u8 pwrsts; 40 /* Powerdomain allowable state bitfields */ 41 #define PWRSTS_OFF BIT(0) 42 #define PWRSTS_RET BIT(1) 43 #define PWRSTS_ON BIT(2) 44 #define PWRSTS_OFF_ON (PWRSTS_OFF | PWRSTS_ON) 45 #define PWRSTS_RET_ON (PWRSTS_RET | PWRSTS_ON) 46 const u16 flags; 47 #define VOTABLE BIT(0) 48 #define CLAMP_IO BIT(1) 49 #define HW_CTRL BIT(2) 50 #define SW_RESET BIT(3) 51 #define AON_RESET BIT(4) 52 #define POLL_CFG_GDSCR BIT(5) 53 #define ALWAYS_ON BIT(6) 54 #define RETAIN_FF_ENABLE BIT(7) 55 #define NO_RET_PERIPH BIT(8) 56 struct reset_controller_dev *rcdev; 57 unsigned int *resets; 58 unsigned int reset_count; 59 60 const char *supply; 61 struct regulator *rsupply; 62 struct device *dev; 63 }; 64 65 struct gdsc_desc { 66 struct device *dev; 67 struct gdsc **scs; 68 size_t num; 69 }; 70 71 #ifdef CONFIG_QCOM_GDSC 72 int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *, 73 struct regmap *); 74 void gdsc_unregister(struct gdsc_desc *desc); 75 int gdsc_gx_do_nothing_enable(struct generic_pm_domain *domain); 76 #else 77 static inline int gdsc_register(struct gdsc_desc *desc, 78 struct reset_controller_dev *rcdev, 79 struct regmap *r) 80 { 81 return -ENOSYS; 82 } 83 84 static inline void gdsc_unregister(struct gdsc_desc *desc) {}; 85 #endif /* CONFIG_QCOM_GDSC */ 86 #endif /* __QCOM_GDSC_H__ */ 87