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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) 2019 Paul Cercueil <paul@crapouillou.net>4 */5 6#include "cgu.h"7#include "pm.h"8 9#include <linux/io.h>10#include <linux/syscore_ops.h>11 12#define CGU_REG_LCR 0x0413 14#define LCR_LOW_POWER_MODE BIT(0)15 16static void __iomem * __maybe_unused ingenic_cgu_base;17 18static int __maybe_unused ingenic_cgu_pm_suspend(void)19{20 u32 val = readl(ingenic_cgu_base + CGU_REG_LCR);21 22 writel(val | LCR_LOW_POWER_MODE, ingenic_cgu_base + CGU_REG_LCR);23 24 return 0;25}26 27static void __maybe_unused ingenic_cgu_pm_resume(void)28{29 u32 val = readl(ingenic_cgu_base + CGU_REG_LCR);30 31 writel(val & ~LCR_LOW_POWER_MODE, ingenic_cgu_base + CGU_REG_LCR);32}33 34static struct syscore_ops __maybe_unused ingenic_cgu_pm_ops = {35 .suspend = ingenic_cgu_pm_suspend,36 .resume = ingenic_cgu_pm_resume,37};38 39void ingenic_cgu_register_syscore_ops(struct ingenic_cgu *cgu)40{41 if (IS_ENABLED(CONFIG_PM_SLEEP)) {42 ingenic_cgu_base = cgu->base;43 register_syscore_ops(&ingenic_cgu_pm_ops);44 }45}46