// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2019 Paul Cercueil <paul@crapouillou.net> */ #include "cgu.h" #include "pm.h" #include <linux/io.h> #include <linux/syscore_ops.h> #define CGU_REG_LCR 0x04 #define LCR_LOW_POWER_MODE BIT(0) static void __iomem * __maybe_unused ingenic_cgu_base; static int __maybe_unused ingenic_cgu_pm_suspend(void) { u32 val = readl(ingenic_cgu_base + CGU_REG_LCR); writel(val | LCR_LOW_POWER_MODE, ingenic_cgu_base + CGU_REG_LCR); return 0; } static void __maybe_unused ingenic_cgu_pm_resume(void) { u32 val = readl(ingenic_cgu_base + CGU_REG_LCR); writel(val & ~LCR_LOW_POWER_MODE, ingenic_cgu_base + CGU_REG_LCR); } static struct syscore_ops __maybe_unused ingenic_cgu_pm_ops = { .suspend = ingenic_cgu_pm_suspend, .resume = ingenic_cgu_pm_resume, }; void ingenic_cgu_register_syscore_ops(struct ingenic_cgu *cgu) { if (IS_ENABLED(CONFIG_PM_SLEEP)) { ingenic_cgu_base = cgu->base; register_syscore_ops(&ingenic_cgu_pm_ops); } }