1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
6 // Exynos - Suspend support
8 // Based on arch/arm/mach-s3c2410/pm.c
13 #include <linux/suspend.h>
23 #include <linux/soc/samsung/exynos-pmu.h>
24 #include <linux/soc/samsung/exynos-regs-pmu.h>
27 #include <asm/hardware/cache-l2x0.h>
31 #include <asm/suspend.h>
36 #define REG_TABLE_END (-1U)
41  * struct exynos_wkup_irq - PMU IRQ to mask mapping
43  * @mask: Mask in PMU wake-up mask register
74  * GIC wake-up support
81 	{ 74, BIT(2) }, /* RTC tick */
87 	{ 45, BIT(2) }, /* RTC tick */
93 	{ 44, BIT(2) }, /* RTC tick */
106 	if (!pm_data->wkup_irq)  in exynos_irq_set_wake()
107 		return -ENOENT;  in exynos_irq_set_wake()
108 	wkup_irq = pm_data->wkup_irq;  in exynos_irq_set_wake()
110 	while (wkup_irq->mask) {  in exynos_irq_set_wake()
111 		if (wkup_irq->hwirq == data->hwirq) {  in exynos_irq_set_wake()
113 				exynos_irqwake_intmask |= wkup_irq->mask;  in exynos_irq_set_wake()
115 				exynos_irqwake_intmask &= ~wkup_irq->mask;  in exynos_irq_set_wake()
121 	return -ENOENT;  in exynos_irq_set_wake()
141 	if (is_of_node(fwspec->fwnode)) {  in exynos_pmu_domain_translate()
142 		if (fwspec->param_count != 3)  in exynos_pmu_domain_translate()
143 			return -EINVAL;  in exynos_pmu_domain_translate()
145 		/* No PPI should point to this domain */  in exynos_pmu_domain_translate()
146 		if (fwspec->param[0] != 0)  in exynos_pmu_domain_translate()
147 			return -EINVAL;  in exynos_pmu_domain_translate()
149 		*hwirq = fwspec->param[1];  in exynos_pmu_domain_translate()
150 		*type = fwspec->param[2];  in exynos_pmu_domain_translate()
154 	return -EINVAL;  in exynos_pmu_domain_translate()
166 	if (fwspec->param_count != 3)  in exynos_pmu_domain_alloc()
167 		return -EINVAL;	/* Not GIC compliant */  in exynos_pmu_domain_alloc()
168 	if (fwspec->param[0] != 0)  in exynos_pmu_domain_alloc()
169 		return -EINVAL;	/* No PPI should point to this domain */  in exynos_pmu_domain_alloc()
171 	hwirq = fwspec->param[1];  in exynos_pmu_domain_alloc()
178 	parent_fwspec.fwnode = domain->parent->fwnode;  in exynos_pmu_domain_alloc()
195 		pr_err("%pOF: no parent, giving up\n", node);  in exynos_pmu_irq_init()
196 		return -ENODEV;  in exynos_pmu_irq_init()
202 		return -ENXIO;  in exynos_pmu_irq_init()
209 		return -ENOMEM;  in exynos_pmu_irq_init()
218 		return -ENOMEM;  in exynos_pmu_irq_init()
222 	 * Clear the OF_POPULATED flag set in of_irq_init so that  in exynos_pmu_irq_init()
232 EXYNOS_PMU_IRQ(exynos3250_pmu_irq, "samsung,exynos3250-pmu");
233 EXYNOS_PMU_IRQ(exynos4210_pmu_irq, "samsung,exynos4210-pmu");
234 EXYNOS_PMU_IRQ(exynos4412_pmu_irq, "samsung,exynos4412-pmu");
235 EXYNOS_PMU_IRQ(exynos5250_pmu_irq, "samsung,exynos5250-pmu");
236 EXYNOS_PMU_IRQ(exynos5420_pmu_irq, "samsung,exynos5420-pmu");
243 	pr_info("Failed to suspend the system\n");  in exynos_cpu_do_idle()
244 	return 1; /* Aborting suspend */  in exynos_cpu_do_idle()
276 	pr_info("Failed to suspend the system\n");  in exynos5420_cpu_suspend()
285 	 * Set wake-up mask registers  in exynos_pm_set_wakeup_mask()
286 	 * EXYNOS_EINT_WAKEUP_MASK is set by pinctrl driver in late suspend.  in exynos_pm_set_wakeup_mask()
302 	/* Set wake-up mask registers */  in exynos_pm_prepare()
315 	/* Set wake-up mask registers */  in exynos3250_pm_prepare()
332 	/* Set wake-up mask registers */  in exynos5420_pm_prepare()
338 	 * secondary CPUs will enter low power start. Though the U-Boot  in exynos5420_pm_prepare()
340 	 * needs to restore it back in case, the primary cpu fails to  in exynos5420_pm_prepare()
341 	 * suspend for any reason.  in exynos5420_pm_prepare()
421 	if (call_firmware_op(resume) == -ENOSYS  in exynos_pm_resume()
427 	/* Clear SLEEP mode set in INFORM1 */  in exynos_pm_resume()
441 	if (call_firmware_op(resume) == -ENOSYS  in exynos3250_pm_resume()
447 	/* Clear SLEEP mode set in INFORM1 */  in exynos3250_pm_resume()
516 	/* Clear SLEEP mode set in INFORM1 */  in exynos5420_pm_resume()
521  * Suspend Ops
534 	if (exynos_irqwake_intmask == -1U  in exynos_suspend_enter()
536 		pr_err("%s: No wake-up sources!\n", __func__);  in exynos_suspend_enter()
538 		return -EINVAL;  in exynos_suspend_enter()
541 	if (pm_data->pm_prepare)  in exynos_suspend_enter()
542 		pm_data->pm_prepare();  in exynos_suspend_enter()
545 	ret = call_firmware_op(suspend);  in exynos_suspend_enter()
546 	if (ret == -ENOSYS)  in exynos_suspend_enter()
547 		ret = cpu_suspend(0, pm_data->cpu_suspend);  in exynos_suspend_enter()
551 	if (pm_data->pm_resume_prepare)  in exynos_suspend_enter()
552 		pm_data->pm_resume_prepare();  in exynos_suspend_enter()
569 	 * avoid hard-coding the suspend to mem state. It's safe to do  in exynos_suspend_prepare()
576 		pr_err("Failed to prepare regulators for suspend (%d)\n", ret);  in exynos_suspend_prepare()
589 		pr_warn("Failed to resume regulators from suspend (%d)\n", ret);  in exynos_suspend_finish()
638 		.compatible = "samsung,exynos3250-pmu",
641 		.compatible = "samsung,exynos4210-pmu",
644 		.compatible = "samsung,exynos4412-pmu",
647 		.compatible = "samsung,exynos5250-pmu",
650 		.compatible = "samsung,exynos5420-pmu",
670 	if (WARN_ON(!of_find_property(np, "interrupt-controller", NULL))) {  in exynos_pm_init()
671 		pr_warn("Outdated DT detected, suspend/resume will NOT work\n");  in exynos_pm_init()
677 	pm_data = (const struct exynos_pm_data *) match->data;  in exynos_pm_init()
681 	tmp |= pm_data->wake_disable_mask;  in exynos_pm_init()
684 	exynos_pm_syscore_ops.suspend	= pm_data->pm_suspend;  in exynos_pm_init()
685 	exynos_pm_syscore_ops.resume	= pm_data->pm_resume;  in exynos_pm_init()
692 	 * firmware, the non-secure region of sysram should be used.  in exynos_pm_init()