irq_sandbox.c
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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 <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 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,
};
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),
};