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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (C) 2011 Google, Inc.
- *
- * Author:
- * Colin Cross <[email protected]>
- *
- * Copyright (C) 2010,2013, NVIDIA Corporation
- */
- #include <linux/cpu_pm.h>
- #include <linux/interrupt.h>
- #include <linux/io.h>
- #include <linux/irqchip/arm-gic.h>
- #include <linux/irq.h>
- #include <linux/kernel.h>
- #include <linux/of_address.h>
- #include <linux/of.h>
- #include <linux/syscore_ops.h>
- #include <soc/tegra/irq.h>
- #include "board.h"
- #include "iomap.h"
- #define SGI_MASK 0xFFFF
- #ifdef CONFIG_PM_SLEEP
- static void __iomem *tegra_gic_cpu_base;
- #endif
- bool tegra_pending_sgi(void)
- {
- u32 pending_set;
- void __iomem *distbase = IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE);
- pending_set = readl_relaxed(distbase + GIC_DIST_PENDING_SET);
- if (pending_set & SGI_MASK)
- return true;
- return false;
- }
- #ifdef CONFIG_PM_SLEEP
- static int tegra_gic_notifier(struct notifier_block *self,
- unsigned long cmd, void *v)
- {
- switch (cmd) {
- case CPU_PM_ENTER:
- writel_relaxed(0x1E0, tegra_gic_cpu_base + GIC_CPU_CTRL);
- break;
- }
- return NOTIFY_OK;
- }
- static struct notifier_block tegra_gic_notifier_block = {
- .notifier_call = tegra_gic_notifier,
- };
- static const struct of_device_id tegra114_dt_gic_match[] __initconst = {
- { .compatible = "arm,cortex-a15-gic" },
- { }
- };
- static void __init tegra114_gic_cpu_pm_registration(void)
- {
- struct device_node *dn;
- dn = of_find_matching_node(NULL, tegra114_dt_gic_match);
- if (!dn)
- return;
- tegra_gic_cpu_base = of_iomap(dn, 1);
- cpu_pm_register_notifier(&tegra_gic_notifier_block);
- }
- #else
- static void __init tegra114_gic_cpu_pm_registration(void) { }
- #endif
- static const struct of_device_id tegra_ictlr_match[] __initconst = {
- { .compatible = "nvidia,tegra20-ictlr" },
- { .compatible = "nvidia,tegra30-ictlr" },
- { }
- };
- void __init tegra_init_irq(void)
- {
- if (WARN_ON(!of_find_matching_node(NULL, tegra_ictlr_match)))
- pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
- tegra114_gic_cpu_pm_registration();
- }
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