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https://github.com/AsahiLinux/u-boot
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
112 lines
2.3 KiB
C
112 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 = sizeof(struct sandbox_irq_priv),
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};
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