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65880ab160
In order for am335x and am437x to properly enter deeper c-states in cpuidle they must always call into the sleep33/43xx suspend code and also sometimes invoke the wkup_m3_ipc driver. These are both controlled by the pm33xx module so we must provide a method for the platform code to call back into the module when it is available as the core cpuidle ops that are invoked by the cpuidle-arm driver must remain as built in. Extend the init platform op to take an idle function as an argument so that we can use this to call into the pm33xx module for c-states that need it. Also add a deinit op so we can unregister this idle function from the PM core when the pm33xx module gets unloaded. Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Dave Gerlach <d-gerlach@ti.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* TI pm33xx platform data
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*
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* Copyright (C) 2016-2018 Texas Instruments, Inc.
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* Dave Gerlach <d-gerlach@ti.com>
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*/
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#ifndef _LINUX_PLATFORM_DATA_PM33XX_H
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#define _LINUX_PLATFORM_DATA_PM33XX_H
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#include <linux/kbuild.h>
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#include <linux/types.h>
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/*
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* WFI Flags for sleep code control
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*
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* These flags allow PM code to exclude certain operations from happening
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* in the low level ASM code found in sleep33xx.S and sleep43xx.S
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*
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* WFI_FLAG_FLUSH_CACHE: Flush the ARM caches and disable caching. Only
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* needed when MPU will lose context.
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* WFI_FLAG_SELF_REFRESH: Let EMIF place DDR memory into self-refresh and
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* disable EMIF.
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* WFI_FLAG_SAVE_EMIF: Save context of all EMIF registers and restore in
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* resume path. Only needed if PER domain loses context
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* and must also have WFI_FLAG_SELF_REFRESH set.
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* WFI_FLAG_WAKE_M3: Disable MPU clock or clockdomain to cause wkup_m3 to
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* execute when WFI instruction executes.
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* WFI_FLAG_RTC_ONLY: Configure the RTC to enter RTC+DDR mode.
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*/
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#define WFI_FLAG_FLUSH_CACHE BIT(0)
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#define WFI_FLAG_SELF_REFRESH BIT(1)
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#define WFI_FLAG_SAVE_EMIF BIT(2)
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#define WFI_FLAG_WAKE_M3 BIT(3)
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#define WFI_FLAG_RTC_ONLY BIT(4)
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#ifndef __ASSEMBLER__
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struct am33xx_pm_sram_addr {
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void (*do_wfi)(void);
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unsigned long *do_wfi_sz;
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unsigned long *resume_offset;
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unsigned long *emif_sram_table;
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unsigned long *ro_sram_data;
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unsigned long resume_address;
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};
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struct am33xx_pm_platform_data {
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int (*init)(int (*idle)(u32 wfi_flags));
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int (*deinit)(void);
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int (*soc_suspend)(unsigned int state, int (*fn)(unsigned long),
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unsigned long args);
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int (*cpu_suspend)(int (*fn)(unsigned long), unsigned long args);
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void (*begin_suspend)(void);
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void (*finish_suspend)(void);
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struct am33xx_pm_sram_addr *(*get_sram_addrs)(void);
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void __iomem *(*get_rtc_base_addr)(void);
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void (*save_context)(void);
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void (*restore_context)(void);
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void (*prepare_rtc_suspend)(void);
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void (*prepare_rtc_resume)(void);
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int (*check_off_mode_enable)(void);
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};
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struct am33xx_pm_sram_data {
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u32 wfi_flags;
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u32 l2_aux_ctrl_val;
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u32 l2_prefetch_ctrl_val;
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} __packed __aligned(8);
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struct am33xx_pm_ro_sram_data {
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u32 amx3_pm_sram_data_virt;
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u32 amx3_pm_sram_data_phys;
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void __iomem *rtc_base_virt;
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} __packed __aligned(8);
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#endif /* __ASSEMBLER__ */
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#endif /* _LINUX_PLATFORM_DATA_PM33XX_H */
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