mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 13:14:27 +00:00
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* Raspberry Pi 4 firmware reset driver
|
||
|
|
*
|
||
|
|
* Copyright (C) 2020 Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
|
||
|
|
*/
|
||
|
|
#include <common.h>
|
||
|
|
#include <dm.h>
|
||
|
|
#include <reset-uclass.h>
|
||
|
|
#include <asm/arch/msg.h>
|
||
|
|
#include <dt-bindings/reset/raspberrypi,firmware-reset.h>
|
||
|
|
|
||
|
|
static int raspberrypi_reset_request(struct reset_ctl *reset_ctl)
|
||
|
|
{
|
||
|
|
if (reset_ctl->id >= RASPBERRYPI_FIRMWARE_RESET_NUM_IDS)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int raspberrypi_reset_free(struct reset_ctl *reset_ctl)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int raspberrypi_reset_assert(struct reset_ctl *reset_ctl)
|
||
|
|
{
|
||
|
|
switch (reset_ctl->id) {
|
||
|
|
case RASPBERRYPI_FIRMWARE_RESET_ID_USB:
|
||
|
|
bcm2711_notify_vl805_reset();
|
||
|
|
return 0;
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int raspberrypi_reset_deassert(struct reset_ctl *reset_ctl)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct reset_ops raspberrypi_reset_ops = {
|
||
|
|
.request = raspberrypi_reset_request,
|
||
|
|
.rfree = raspberrypi_reset_free,
|
||
|
|
.rst_assert = raspberrypi_reset_assert,
|
||
|
|
.rst_deassert = raspberrypi_reset_deassert,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct udevice_id raspberrypi_reset_ids[] = {
|
||
|
|
{ .compatible = "raspberrypi,firmware-reset" },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
|
||
|
|
U_BOOT_DRIVER(raspberrypi_reset) = {
|
||
|
|
.name = "raspberrypi-reset",
|
||
|
|
.id = UCLASS_RESET,
|
||
|
|
.of_match = raspberrypi_reset_ids,
|
||
|
|
.ops = &raspberrypi_reset_ops,
|
||
|
|
};
|
||
|
|
|