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