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 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 */
28struct 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
57struct gdsc_desc {
58 struct device *dev;
59 struct gdsc **scs;
60 size_t num;
61};
62
63#ifdef CONFIG_QCOM_GDSC
64int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *,
65 struct regmap *);
66void gdsc_unregister(struct gdsc_desc *desc);
67#else
68static inline int gdsc_register(struct gdsc_desc *desc,
69 struct reset_controller_dev *rcdev,
70 struct regmap *r)
71{
72 return -ENOSYS;
73}
74
75static inline void gdsc_unregister(struct gdsc_desc *desc) {};
76#endif /* CONFIG_QCOM_GDSC */
77#endif /* __QCOM_GDSC_H__ */