LXR linux/include/linux/soc/samsung/s3c-pm.h

   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
  95