tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14#ifndef __QCOM_GDSC_H__
15#define __QCOM_GDSC_H__
16
17#include <linux/err.h>
18#include <linux/pm_domain.h>
19
20struct regmap;
21struct reset_controller_dev;
22
23/* Powerdomain allowable state bitfields */
24#define PWRSTS_OFF BIT(0)
25#define PWRSTS_RET BIT(1)
26#define PWRSTS_ON BIT(2)
27#define PWRSTS_OFF_ON (PWRSTS_OFF | PWRSTS_ON)
28#define PWRSTS_RET_ON (PWRSTS_RET | PWRSTS_ON)
29
30/**
31 * struct gdsc - Globally Distributed Switch Controller
32 * @pd: generic power domain
33 * @regmap: regmap for MMIO accesses
34 * @gdscr: gsdc control register
35 * @cxcs: offsets of branch registers to toggle mem/periph bits in
36 * @cxc_count: number of @cxcs
37 * @pwrsts: Possible powerdomain power states
38 * @resets: ids of resets associated with this gdsc
39 * @reset_count: number of @resets
40 * @rcdev: reset controller
41 */
42struct gdsc {
43 struct generic_pm_domain pd;
44 struct regmap *regmap;
45 unsigned int gdscr;
46 unsigned int *cxcs;
47 unsigned int cxc_count;
48 const u8 pwrsts;
49 struct reset_controller_dev *rcdev;
50 unsigned int *resets;
51 unsigned int reset_count;
52};
53
54#ifdef CONFIG_QCOM_GDSC
55int gdsc_register(struct device *, struct gdsc **, size_t n,
56 struct reset_controller_dev *, struct regmap *);
57void gdsc_unregister(struct device *);
58#else
59static inline int gdsc_register(struct device *d, struct gdsc **g, size_t n,
60 struct reset_controller_dev *rcdev,
61 struct regmap *r)
62{
63 return -ENOSYS;
64}
65
66static inline void gdsc_unregister(struct device *d) {};
67#endif /* CONFIG_QCOM_GDSC */
68#endif /* __QCOM_GDSC_H__ */