tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
12struct regmap;
13struct regulator;
14struct 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 */
29struct 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 u16 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#define NO_RET_PERIPH BIT(8)
55 struct reset_controller_dev *rcdev;
56 unsigned int *resets;
57 unsigned int reset_count;
58
59 const char *supply;
60 struct regulator *rsupply;
61};
62
63struct gdsc_desc {
64 struct device *dev;
65 struct gdsc **scs;
66 size_t num;
67};
68
69#ifdef CONFIG_QCOM_GDSC
70int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *,
71 struct regmap *);
72void gdsc_unregister(struct gdsc_desc *desc);
73int gdsc_gx_do_nothing_enable(struct generic_pm_domain *domain);
74#else
75static inline int gdsc_register(struct gdsc_desc *desc,
76 struct reset_controller_dev *rcdev,
77 struct regmap *r)
78{
79 return -ENOSYS;
80}
81
82static inline void gdsc_unregister(struct gdsc_desc *desc) {};
83#endif /* CONFIG_QCOM_GDSC */
84#endif /* __QCOM_GDSC_H__ */