Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2025-03-13 21:36:57 +00:00
Code Issues Projects Releases Packages Wiki Activity

dm: sysreset: add watchdog-reboot driver

Browse source 
Add a new sysreset driver that uses the recently added watchdog support.
It performs a full SoC reset by calling wdt_expire_now op.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Álvaro Fernández Rojas 2017-05-16 18:29:13 +02:00 • committed by Daniel Schwierzeck
parent 1947a44b78
commit 17a0c14164
3 changed files with 67 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/sysreset/Kconfig
View file

@ -31,4 +31,10 @@ config SYSRESET_SYSCON
help
Reboot support for generic SYSCON mapped register reset.
config SYSRESET_WATCHDOG
bool "Enable support for watchdog reboot driver"
select WDT
help
Reboot support for generic watchdog reset.
endmenu

1
drivers/sysreset/Makefile
View file

@ -7,6 +7,7 @@
obj-$(CONFIG_SYSRESET) += sysreset-uclass.o
obj-$(CONFIG_SYSRESET_PSCI) += sysreset_psci.o
obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o
obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o
ifndef CONFIG_SPL_BUILD
obj-$(CONFIG_ROCKCHIP_RK3036) += sysreset_rk3036.o

60
drivers/sysreset/sysreset_watchdog.c Normal file
View file

@ -0,0 +1,60 @@
/*
* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <sysreset.h>
#include <wdt.h>
struct wdt_reboot_priv {
struct udevice *wdt;
};
static int wdt_reboot_request(struct udevice *dev, enum sysreset_t type)
{
struct wdt_reboot_priv *priv = dev_get_priv(dev);
int ret;
ret = wdt_expire_now(priv->wdt, 0);
if (ret)
return ret;
return -EINPROGRESS;
}
static struct sysreset_ops wdt_reboot_ops = {
.request = wdt_reboot_request,
};
int wdt_reboot_probe(struct udevice *dev)
{
struct wdt_reboot_priv *priv = dev_get_priv(dev);
int err;
err = uclass_get_device_by_phandle(UCLASS_WDT, dev,
"wdt", &priv->wdt);
if (err) {
error("unable to find wdt device\n");
return err;
}
return 0;
}
static const struct udevice_id wdt_reboot_ids[] = {
{ .compatible = "wdt-reboot" },
{ /* sentinel */ }
};
U_BOOT_DRIVER(wdt_reboot) = {
.name = "wdt_reboot",
.id = UCLASS_SYSRESET,
.of_match = wdt_reboot_ids,
.ops = &wdt_reboot_ops,
.priv_auto_alloc_size = sizeof(struct wdt_reboot_priv),
.probe = wdt_reboot_probe,
};