1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2006-2008 Nokia Corporation
13  * Richard Woodruff <r-woodruff2@ti.com>
29 #include <linux/omap-gpmc.h>
42 #include "cm-regbits-34xx.h"
43 #include "prm-regbits-34xx.h"
47 #include "omap-secure.h"
82 	/* Save the Interrupt controller context */  in omap3_core_save_context()
84 	/* Save the GPMC context */  in omap3_core_save_context()
86 	/* Save the system control module context, padconf already save above*/  in omap3_core_save_context()
92 	/* Restore the control module context, padconf restored by h/w */  in omap3_core_restore_context()
94 	/* Restore the GPMC context */  in omap3_core_restore_context()
96 	/* Restore the interrupt controller context */  in omap3_core_restore_context()
101  * FIXME: This function should be called before entering off-mode after
201 		/* No need to save context */  in omap_sram_idle()
217 	/* Enable IO-PAD and IO-CHAIN wakeups */  in omap_sram_idle()
223 	/* PER */  in omap_sram_idle()
256 	 * omap3_arm_context is the location where some ARM context  in omap_sram_idle()
283 		 * In off-mode resume path above, omap3_core_restore_context  in omap_sram_idle()
285 		 * this to non-off mode resume paths so we don't do it twice.  in omap_sram_idle()
292 	/* PER */  in omap_sram_idle()
313 		pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm);  in omap3_pm_suspend()
316 		if (omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state))  in omap3_pm_suspend()
318 		if (pwrdm_clear_all_prev_pwrst(pwrst->pwrdm))  in omap3_pm_suspend()
329 		state = pwrdm_read_prev_pwrst(pwrst->pwrdm);  in omap3_pm_suspend()
330 		if (state > pwrst->next_state) {  in omap3_pm_suspend()
332 				pwrst->pwrdm->name, pwrst->next_state);  in omap3_pm_suspend()
333 			ret = -1;  in omap3_pm_suspend()
335 		omap_set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state);  in omap3_pm_suspend()
367 				pwrst->pwrdm == core_pwrdm &&  in omap3_pm_off_mode_enable()
369 			pwrst->next_state = PWRDM_POWER_RET;  in omap3_pm_off_mode_enable()
373 			pwrst->next_state = state;  in omap3_pm_off_mode_enable()
375 		omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);  in omap3_pm_off_mode_enable()
384 		if (pwrst->pwrdm == pwrdm)  in omap3_pm_get_suspend_state()
385 			return pwrst->next_state;  in omap3_pm_get_suspend_state()
387 	return -EINVAL;  in omap3_pm_get_suspend_state()
395 		if (pwrst->pwrdm == pwrdm) {  in omap3_pm_set_suspend_state()
396 			pwrst->next_state = state;  in omap3_pm_set_suspend_state()
400 	return -EINVAL;  in omap3_pm_set_suspend_state()
407 	if (!pwrdm->pwrsts)  in pwrdms_setup()
412 		return -ENOMEM;  in pwrdms_setup()
413 	pwrst->pwrdm = pwrdm;  in pwrdms_setup()
416 		pwrst->next_state = PWRDM_POWER_OFF;  in pwrdms_setup()
418 		pwrst->next_state = PWRDM_POWER_RET;  in pwrdms_setup()
420 	list_add(&pwrst->node, &pwrst_list);  in pwrdms_setup()
425 	return omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);  in pwrdms_setup()
432  * - omap3_do_wfi for erratum i581 WA,
457 	np = of_find_compatible_node(NULL, NULL, "ti,twl4030-power-idle");  in omap3_pm_check_pmic()
459 		np = of_find_compatible_node(NULL, NULL, "ti,twl4030-power-idle-osc-off");  in omap3_pm_check_pmic()
515 		ret = -EINVAL;  in omap3_pm_init()
534 	 * RTA is disabled during initialization as per erratum i608  in omap3_pm_init()
543 	 * not correctly reset when the PER powerdomain comes back  in omap3_pm_init()
545 	 * See OMAP36xx Erratum i582 "PER Domain reset issue after  in omap3_pm_init()
546 	 * Domain-OFF/OSWR Wakeup".  This wakeup dependency is not a  in omap3_pm_init()
547 	 * complete workaround.  The kernel must also prevent the PER  in omap3_pm_init()
549 	 * powerdomain is not going to OSWR/OFF.  And if PER last  in omap3_pm_init()
552 	 * self-test using their loopback tests; if that fails, those  in omap3_pm_init()
553 	 * devices are unusable until the PER/CORE can complete a transition  in omap3_pm_init()
556 	 * XXX Technically this workaround is only needed if off-mode  in omap3_pm_init()
567 			pr_err("Memory allocation failed when allocating for secure sram context\n");  in omap3_pm_init()
581 		list_del(&pwrst->node);  in omap3_pm_init()