LXR linux/include/linux/platform

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * TI pm33xx platform data
   4 *
   5 * Copyright (C) 2016-2018 Texas Instruments, Inc.
   6 *      Dave Gerlach <d-gerlach@ti.com>
   7 */
   8
   9#ifndef _LINUX_PLATFORM_DATA_PM33XX_H
  10#define _LINUX_PLATFORM_DATA_PM33XX_H
  11
  12#include <linux/kbuild.h>
  13#include <linux/types.h>
  14
  15/*
  16 * WFI Flags for sleep code control
  17 *
  18 * These flags allow PM code to exclude certain operations from happening
  19 * in the low level ASM code found in sleep33xx.S and sleep43xx.S
  20 *
  21 * WFI_FLAG_FLUSH_CACHE: Flush the ARM caches and disable caching. Only
  22 *                       needed when MPU will lose context.
  23 * WFI_FLAG_SELF_REFRESH: Let EMIF place DDR memory into self-refresh and
  24 *                        disable EMIF.
  25 * WFI_FLAG_SAVE_EMIF: Save context of all EMIF registers and restore in
  26 *                     resume path. Only needed if PER domain loses context
  27 *                     and must also have WFI_FLAG_SELF_REFRESH set.
  28 * WFI_FLAG_WAKE_M3: Disable MPU clock or clockdomain to cause wkup_m3 to
  29 *                   execute when WFI instruction executes.
  30 * WFI_FLAG_RTC_ONLY: Configure the RTC to enter RTC+DDR mode.
  31 */
  32#define WFI_FLAG_FLUSH_CACHE            BIT(0)
  33#define WFI_FLAG_SELF_REFRESH           BIT(1)
  34#define WFI_FLAG_SAVE_EMIF              BIT(2)
  35#define WFI_FLAG_WAKE_M3                BIT(3)
  36#define WFI_FLAG_RTC_ONLY               BIT(4)
  37
  38#ifndef __ASSEMBLER__
  39struct am33xx_pm_sram_addr {
  40        void (*do_wfi)(void);
  41        unsigned long *do_wfi_sz;
  42        unsigned long *resume_offset;
  43        unsigned long *emif_sram_table;
  44        unsigned long *ro_sram_data;
  45        unsigned long resume_address;
  46};
  47
  48struct am33xx_pm_platform_data {
  49        int     (*init)(int (*idle)(u32 wfi_flags));
  50        int     (*deinit)(void);
  51        int     (*soc_suspend)(unsigned int state, int (*fn)(unsigned long),
  52                               unsigned long args);
  53        int     (*cpu_suspend)(int (*fn)(unsigned long), unsigned long args);
  54        void    (*begin_suspend)(void);
  55        void    (*finish_suspend)(void);
  56        struct  am33xx_pm_sram_addr *(*get_sram_addrs)(void);
  57        void (*save_context)(void);
  58        void (*restore_context)(void);
  59        int (*check_off_mode_enable)(void);
  60};
  61
  62struct am33xx_pm_sram_data {
  63        u32 wfi_flags;
  64        u32 l2_aux_ctrl_val;
  65        u32 l2_prefetch_ctrl_val;
  66} __packed __aligned(8);
  67
  68struct am33xx_pm_ro_sram_data {
  69        u32 amx3_pm_sram_data_virt;
  70        u32 amx3_pm_sram_data_phys;
  71        void __iomem *rtc_base_virt;
  72} __packed __aligned(8);
  73
  74#endif /* __ASSEMBLER__ */
  75#endif /* _LINUX_PLATFORM_DATA_PM33XX_H */
  76