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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2021 Ahmad Fatoum, Pengutronix
*/
#include <common.h>
#include <driver.h>
#include <poweroff.h>
#include <asm/htif.h>
static void __iomem *htif = IOMEM(HTIF_DEFAULT_BASE_ADDR);
static void __noreturn riscvemu_poweroff(struct poweroff_handler *pwr)
{
shutdown_barebox();
__htif_tohost(htif, HTIF_DEV_SYSCALL, 0, 1);
__builtin_unreachable();
}
static int htif_poweroff_probe(struct device *dev)
{
struct resource *iores;
iores = dev_request_mem_resource(dev, 0);
if (!IS_ERR(iores))
htif = IOMEM(iores->start);
else if (PTR_ERR(iores) != -ENOENT)
return PTR_ERR(iores);
return poweroff_handler_register_fn(riscvemu_poweroff);
}
static const struct of_device_id htif_poweroff_of_match[] = {
{ .compatible = "ucb,htif0" },
{}
};
static struct driver_d htif_poweroff_driver = {
.name = "htif-poweroff",
.of_compatible = htif_poweroff_of_match,
.probe = htif_poweroff_probe,
};
coredevice_platform_driver(htif_poweroff_driver);
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