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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Sandbox driver for interrupts
- *
- * Copyright 2019 Google LLC
- */
- #include <common.h>
- #include <dm.h>
- #include <irq.h>
- #include <acpi/acpi_device.h>
- #include <asm/test.h>
- /**
- * struct sandbox_irq_priv - private data for this driver
- *
- * @count: Counts the number calls to the read_and_clear() method
- * @pending: true if an interrupt is pending, else false
- */
- struct sandbox_irq_priv {
- int count;
- bool pending;
- };
- static int sandbox_set_polarity(struct udevice *dev, uint irq, bool active_low)
- {
- if (irq > 10)
- return -EINVAL;
- return 0;
- }
- static int sandbox_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num)
- {
- if (pmc_gpe_num > 10)
- return -ENOENT;
- return pmc_gpe_num + 1;
- }
- static int sandbox_snapshot_polarities(struct udevice *dev)
- {
- return 0;
- }
- static int sandbox_restore_polarities(struct udevice *dev)
- {
- return 0;
- }
- static int sandbox_irq_read_and_clear(struct irq *irq)
- {
- struct sandbox_irq_priv *priv = dev_get_priv(irq->dev);
- if (irq->id != SANDBOX_IRQN_PEND)
- return -EINVAL;
- priv->count++;
- if (priv->pending) {
- priv->pending = false;
- return 1;
- }
- if (!(priv->count % 3))
- priv->pending = true;
- return 0;
- }
- static int sandbox_irq_of_xlate(struct irq *irq,
- struct ofnode_phandle_args *args)
- {
- irq->id = args->args[0];
- return 0;
- }
- static __maybe_unused int sandbox_get_acpi(const struct irq *irq,
- struct acpi_irq *acpi_irq)
- {
- acpi_irq->pin = irq->id;
- acpi_irq->mode = ACPI_IRQ_LEVEL_TRIGGERED;
- acpi_irq->polarity = ACPI_IRQ_ACTIVE_HIGH;
- acpi_irq->shared = ACPI_IRQ_SHARED;
- acpi_irq->wake = ACPI_IRQ_WAKE;
- return 0;
- }
- static const struct irq_ops sandbox_irq_ops = {
- .route_pmc_gpio_gpe = sandbox_route_pmc_gpio_gpe,
- .set_polarity = sandbox_set_polarity,
- .snapshot_polarities = sandbox_snapshot_polarities,
- .restore_polarities = sandbox_restore_polarities,
- .read_and_clear = sandbox_irq_read_and_clear,
- .of_xlate = sandbox_irq_of_xlate,
- #if CONFIG_IS_ENABLED(ACPIGEN)
- .get_acpi = sandbox_get_acpi,
- #endif
- };
- static const struct udevice_id sandbox_irq_ids[] = {
- { .compatible = "sandbox,irq", SANDBOX_IRQT_BASE },
- { }
- };
- U_BOOT_DRIVER(sandbox_irq_drv) = {
- .name = "sandbox_irq",
- .id = UCLASS_IRQ,
- .of_match = sandbox_irq_ids,
- .ops = &sandbox_irq_ops,
- .priv_auto_alloc_size = sizeof(struct sandbox_irq_priv),
- };
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