u-boot/drivers/sysreset/sysreset_resetctl.c
Weijie Gao caf7092294 sysreset: add reset controller based reboot driver
Some chips provide their sysreset function in reset controller, which is
normally a bit written to 1 to perform the sysreset.

This patch adds a new sysreset driver to take advantage of it.

Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
2020-04-27 20:29:33 +02:00

48 lines
1 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020 MediaTek Inc.
*
* Author: Weijie Gao <weijie.gao@mediatek.com>
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <sysreset.h>
#include <reset.h>
struct resetctl_reboot_priv {
struct reset_ctl_bulk resets;
};
static int resetctl_reboot_request(struct udevice *dev, enum sysreset_t type)
{
struct resetctl_reboot_priv *priv = dev_get_priv(dev);
return reset_assert_bulk(&priv->resets);
}
static struct sysreset_ops resetctl_reboot_ops = {
.request = resetctl_reboot_request,
};
int resetctl_reboot_probe(struct udevice *dev)
{
struct resetctl_reboot_priv *priv = dev_get_priv(dev);
return reset_get_bulk(dev, &priv->resets);
}
static const struct udevice_id resetctl_reboot_ids[] = {
{ .compatible = "resetctl-reboot" },
{ }
};
U_BOOT_DRIVER(resetctl_reboot) = {
.id = UCLASS_SYSRESET,
.name = "resetctl_reboot",
.of_match = resetctl_reboot_ids,
.ops = &resetctl_reboot_ops,
.priv_auto_alloc_size = sizeof(struct resetctl_reboot_priv),
.probe = resetctl_reboot_probe,
};