arm/mach-exynos/pm.c

1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
6 // Exynos - Power Management support
8 // Based on arch/arm/mach-s3c2410/pm.c
17 #include <linux/soc/samsung/exynos-regs-pmu.h>
18 #include <linux/soc/samsung/exynos-pmu.h>
47 /* For Cortex-A9 Diagnostic and Power control register */
54 	/* Save Power control register */  in exynos_cpu_save_register()
71 	/* Restore Power control register */  in exynos_cpu_restore_register()
90 	/* Setting Central Sequence Register for power down mode */  in exynos_pm_central_suspend()
113 		return -1;  in exynos_pm_central_resume()
119 /* Ext-GIC nIRQ/nFIQ is the only wakeup source in AFTR */
139 	/* Set value of power down register for aftr mode */  in exynos_aftr_finisher()
143 	if (ret == -ENOSYS) {  in exynos_aftr_finisher()
174 		if (call_firmware_op(resume) == -ENOSYS)  in exynos_enter_aftr()
191 	int ret = -1;  in exynos_cpu0_enter_aftr()
194 	 * If the other cpu is powered on, we have to power it off, because  in exynos_cpu0_enter_aftr()
200 		 * the other cpu will power down itself or will abort the  in exynos_cpu0_enter_aftr()
207 			 * The other cpu may skip idle and boot back  in exynos_cpu0_enter_aftr()
208 			 * up again  in exynos_cpu0_enter_aftr()
215 			 * boot back up again, getting stuck in the  in exynos_cpu0_enter_aftr()
221 			ret = -1;  in exynos_cpu0_enter_aftr()
237 		 * Set the boot vector to something non-zero  in exynos_cpu0_enter_aftr()
285 	return -1;  in exynos_wfi_finisher()
290 	int ret = -1;  in exynos_cpu1_powerdown()