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[linux.git] / drivers / clk / qcom / gdsc.h
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  */
29 struct gdsc {
30         struct generic_pm_domain        pd;
31         struct generic_pm_domain        *parent;
32         struct regmap                   *regmap;
33         unsigned int                    gdscr;
34         unsigned int                    gds_hw_ctrl;
35         unsigned int                    clamp_io_ctrl;
36         unsigned int                    *cxcs;
37         unsigned int                    cxc_count;
38         const u8                        pwrsts;
39 /* Powerdomain allowable state bitfields */
40 #define PWRSTS_OFF              BIT(0)
41 #define PWRSTS_RET              BIT(1)
42 #define PWRSTS_ON               BIT(2)
43 #define PWRSTS_OFF_ON           (PWRSTS_OFF | PWRSTS_ON)
44 #define PWRSTS_RET_ON           (PWRSTS_RET | PWRSTS_ON)
45         const u8                        flags;
46 #define VOTABLE         BIT(0)
47 #define CLAMP_IO        BIT(1)
48 #define HW_CTRL         BIT(2)
49 #define SW_RESET        BIT(3)
50 #define AON_RESET       BIT(4)
51 #define POLL_CFG_GDSCR  BIT(5)
52 #define ALWAYS_ON       BIT(6)
53 #define RETAIN_FF_ENABLE        BIT(7)
54         struct reset_controller_dev     *rcdev;
55         unsigned int                    *resets;
56         unsigned int                    reset_count;
57
58         const char                      *supply;
59         struct regulator                *rsupply;
60 };
61
62 struct gdsc_desc {
63         struct device *dev;
64         struct gdsc **scs;
65         size_t num;
66 };
67
68 #ifdef CONFIG_QCOM_GDSC
69 int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *,
70                   struct regmap *);
71 void gdsc_unregister(struct gdsc_desc *desc);
72 int gdsc_gx_do_nothing_enable(struct generic_pm_domain *domain);
73 #else
74 static inline int gdsc_register(struct gdsc_desc *desc,
75                                 struct reset_controller_dev *rcdev,
76                                 struct regmap *r)
77 {
78         return -ENOSYS;
79 }
80
81 static inline void gdsc_unregister(struct gdsc_desc *desc) {};
82 #endif /* CONFIG_QCOM_GDSC */
83 #endif /* __QCOM_GDSC_H__ */
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