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sysreset: add reset controller based reboot driver

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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>
This commit is contained in:
Weijie Gao 2020-04-21 09:28:29 +02:00 committed by Daniel Schwierzeck
parent 2a9d68e41f
commit caf7092294
3 changed files with 55 additions and 0 deletions
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6
drivers/sysreset/Kconfig
View file

@ -101,6 +101,12 @@ config SYSRESET_WATCHDOG
help
Reboot support for generic watchdog reset.
config SYSRESET_RESETCTL
bool "Enable support for reset controller reboot driver"
select DM_RESET
help
Reboot support using generic reset controller.
config SYSRESET_X86
bool "Enable support for x86 processor reboot driver"
depends on X86

1
drivers/sysreset/Makefile
View file

@ -16,5 +16,6 @@ obj-$(CONFIG_SYSRESET_SOCFPGA_S10) += sysreset_socfpga_s10.o
obj-$(CONFIG_SYSRESET_TI_SCI) += sysreset-ti-sci.o
obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o
obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o
obj-$(CONFIG_SYSRESET_RESETCTL) += sysreset_resetctl.o
obj-$(CONFIG_$(SPL_TPL_)SYSRESET_X86) += sysreset_x86.o
obj-$(CONFIG_TARGET_XTFPGA) += sysreset_xtfpga.o

48
drivers/sysreset/sysreset_resetctl.c Normal file
View file

@ -0,0 +1,48 @@
// 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,
};