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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
4 * Tomasz Figa <t.figa@samsung.com>
5 * Copyright (c) 2004 Simtec Electronics
6 * http://armlinux.simtec.co.uk/
7 * Written by Ben Dooks, <ben@simtec.co.uk>
8 */
9
10#ifndef __LINUX_SOC_SAMSUNG_S3C_PM_H
11#define __LINUX_SOC_SAMSUNG_S3C_PM_H __FILE__
12
13#include <linux/types.h>
14
15/* PM debug functions */
16
17/**
18 * struct pm_uart_save - save block for core UART
19 * @ulcon: Save value for S3C2410_ULCON
20 * @ucon: Save value for S3C2410_UCON
21 * @ufcon: Save value for S3C2410_UFCON
22 * @umcon: Save value for S3C2410_UMCON
23 * @ubrdiv: Save value for S3C2410_UBRDIV
24 *
25 * Save block for UART registers to be held over sleep and restored if they
26 * are needed (say by debug).
27*/
28struct pm_uart_save {
29 u32 ulcon;
30 u32 ucon;
31 u32 ufcon;
32 u32 umcon;
33 u32 ubrdiv;
34 u32 udivslot;
35};
36
37#ifdef CONFIG_SAMSUNG_PM_DEBUG
38/**
39 * s3c_pm_dbg() - low level debug function for use in suspend/resume.
40 * @msg: The message to print.
41 *
42 * This function is used mainly to debug the resume process before the system
43 * can rely on printk/console output. It uses the low-level debugging output
44 * routine printascii() to do its work.
45 */
46extern void s3c_pm_dbg(const char *msg, ...);
47
48#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
49
50extern void s3c_pm_save_uarts(bool is_s3c24xx);
51extern void s3c_pm_restore_uarts(bool is_s3c24xx);
52
53#ifdef CONFIG_ARCH_S3C64XX
54extern void s3c_pm_arch_update_uart(void __iomem *regs,
55 struct pm_uart_save *save);
56#else
57static inline void
58s3c_pm_arch_update_uart(void __iomem *regs, struct pm_uart_save *save)
59{
60}
61#endif
62
63#else
64#define S3C_PMDBG(fmt...) pr_debug(fmt)
65
66static inline void s3c_pm_save_uarts(bool is_s3c24xx) { }
67static inline void s3c_pm_restore_uarts(bool is_s3c24xx) { }
68#endif
69
70/* suspend memory checking */
71
72#ifdef CONFIG_SAMSUNG_PM_CHECK
73extern void s3c_pm_check_prepare(void);
74extern void s3c_pm_check_restore(void);
75extern void s3c_pm_check_cleanup(void);
76extern void s3c_pm_check_store(void);
77#else
78#define s3c_pm_check_prepare() do { } while (0)
79#define s3c_pm_check_restore() do { } while (0)
80#define s3c_pm_check_cleanup() do { } while (0)
81#define s3c_pm_check_store() do { } while (0)
82#endif
83
84/* system device subsystems */
85
86extern struct bus_type s3c2410_subsys;
87extern struct bus_type s3c2410a_subsys;
88extern struct bus_type s3c2412_subsys;
89extern struct bus_type s3c2416_subsys;
90extern struct bus_type s3c2440_subsys;
91extern struct bus_type s3c2442_subsys;
92extern struct bus_type s3c2443_subsys;
93
94#endif