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linux/arch/arm/mach-at91/pm.h

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-27 14:55:01 +08:00
/* SPDX-License-Identifier: GPL-2.0-or-later */
ARM: at91: declare header name Add the header and define the macro to prevent multiple inclusion like the others headers. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2012-01-25 07:56:06 +08:00
/*
* AT91 Power Management
*
* Copyright (C) 2005 David Brownell
*/
#ifndef __ARCH_ARM_MACH_AT91_PM
#define __ARCH_ARM_MACH_AT91_PM
ARM: at91: cpuidle: Convert to platform driver Using the platform driver model is a good way to separate the cpuidle specific code from the low level pm code. It allows to remove the dependency between these two components. The platform_device is located in the pm code and a 'set' function has been added to set the standby function from the AT91_SOC_START initialization function. Each SoC with a cpuidle driver will set the standby function in the platform_data field at init time. Then pm code will register the cpuidle platform device. The cpuidle driver will register the platform_driver and use the device's platform_data as a standby callback in the idle path. The at91_pm_enter function contains a { if then else } based on cpu_is_xx similar to what was in cpuidle. This is considered dangerous when adding a new SoC. Like the cpuidle driver, a standby ops is defined and assigned when the SoC init function specifies what is its standby function and reused in the at91_pm_enter's 'case' block. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-09-23 04:29:57 +08:00
#include <asm/proc-fns.h>
ARM: at91: remove mach/at91_ramc.h and mach/at91rm9200_mc.h mach/at91_ramc.h and mach/at91rm9200_mc.h aren't necessary anymore, remove them. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-16 22:13:39 +08:00
#include <linux/mfd/syscon/atmel-mc.h>
#include <soc/at91/at91sam9_ddrsdr.h>
#include <soc/at91/at91sam9_sdramc.h>
ARM: at91/pm: move AT91_MEMCTRL_* to pm.h the AT91_MEMCTRL_* defines are only used by the pm code, move them to pm.h Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-17 06:44:38 +08:00
#define AT91_MEMCTRL_MC 0
#define AT91_MEMCTRL_SDRAMC 1
#define AT91_MEMCTRL_DDRSDR 2
ARM: at91: pm: Use ULP0 naming instead of slow clock Switch to use ULP0 naming instead of slow clock naming for power modes, to be as closed as possible to datasheet. This commit does the necessary renaming and macro addition to be as close as possible to the namings from [1]. [1] https://lore.kernel.org/lkml/1470650705-31418-3-git-send-email-wenyou.yang@atmel.com Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-07-17 16:26:54 +08:00
#define AT91_PM_STANDBY 0x00
#define AT91_PM_ULP0 0x01
ARM: at91: pm: Add ULP1 mode support In the ULP1 mode, in order to achieve the lowest power consumption with the system in retention mode and be able to resume on the wake up events, all the clocks are shut off, inclusive the embedded 12MHz RC oscillator, and the number of wake up sources is limited as well. When the wake up event is asserted, the embedded 12MHz RC oscillator restarts automatically. The ULP1 (Ultra Low-power mode 1) is introduced by SAMA5D2. The previous size of pm_suspend.o was 2148 bytes. With the addition of ULP1 mode the new size of pm_suspend.o raised at 2456 bytes. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com> [claudiu.beznea@microchip.com: aligned with 4.18-rc1] Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-07-17 16:26:55 +08:00
#define AT91_PM_ULP1 0x02
#define AT91_PM_BACKUP 0x03
ARM: at91/pm: standby mode uses same sram function as suspend to memory mode To simply the PM code, the suspend to standby mode uses same sram function as the suspend to memory mode, running in the internal SRAM, instead of the respective code for each mode. For the suspend to standby mode, the master clock doesn't switch to the slow clock, and PLLA and the main oscillator doesn't turn off as well. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-09 11:49:46 +08:00
ARM: at91: pm: Use struct at91_pm_data in pm_suspend.S The number of register we can safely pass to at91_pm_suspend_in_sram is limited. Instead, pass the address to the at91_pm_data structure. The offsets are automatically generated to avoid hardcoding them. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-02-01 01:12:57 +08:00
#ifndef __ASSEMBLY__
struct at91_pm_data {
void __iomem *pmc;
void __iomem *ramc[2];
unsigned long uhp_udp_mask;
unsigned int memctrl;
unsigned int mode;
ARM: at91: pm: Add sama5d2 backup mode The sama5d2 has a mode were it is possible to cut power to the SoC while keeping the RAM in self refresh. Resuming from that mode needs support in the firmware/bootloader. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
2016-09-27 18:29:50 +08:00
void __iomem *shdwc;
void __iomem *sfrbu;
ARM: at91: pm: allow selecting standby and suspend modes While we can only select between "standby" and "mem" states for power management, the atmel platforms can actually support more modes. For both standby and mem, allow selecting which mode will be used using the atmel.pm_modes kernel parameter. By default, keep the current modes. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
2017-04-26 22:31:03 +08:00
unsigned int standby_mode;
unsigned int suspend_mode;
ARM: at91: pm: Use struct at91_pm_data in pm_suspend.S The number of register we can safely pass to at91_pm_suspend_in_sram is limited. Instead, pass the address to the at91_pm_data structure. The offsets are automatically generated to avoid hardcoding them. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-02-01 01:12:57 +08:00
};
#endif
ARM: at91/pm: standby mode uses same sram function as suspend to memory mode To simply the PM code, the suspend to standby mode uses same sram function as the suspend to memory mode, running in the internal SRAM, instead of the respective code for each mode. For the suspend to standby mode, the master clock doesn't switch to the slow clock, and PLLA and the main oscillator doesn't turn off as well. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-09 11:49:46 +08:00
#endif