diff options
| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2017-05-16 18:29:13 +0200 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2017-05-31 14:49:54 +0200 |
| commit | 17a0c14164dc0bab8b09a910c567c74bb838eab5 (patch) | |
| tree | 66a1d56b4446a0c3453a30f96373c798cd36b322 /drivers | |
| parent | 1947a44b78f107e9f9b61b1f7762fe8b7f1501c7 (diff) | |
| download | u-boot-17a0c14164dc0bab8b09a910c567c74bb838eab5.tar.gz | |
dm: sysreset: add watchdog-reboot driver
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/sysreset/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/sysreset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/sysreset/sysreset_watchdog.c | 60 |
3 files changed, 67 insertions, 0 deletions
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig index b2f746494d..a6d48e8a66 100644 --- a/drivers/sysreset/Kconfig +++ b/drivers/sysreset/Kconfig @@ -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 diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile index bd352e7541..b68381148c 100644 --- a/drivers/sysreset/Makefile +++ b/drivers/sysreset/Makefile @@ -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 diff --git a/drivers/sysreset/sysreset_watchdog.c b/drivers/sysreset/sysreset_watchdog.c new file mode 100644 index 0000000000..304ed052a2 --- /dev/null +++ b/drivers/sysreset/sysreset_watchdog.c @@ -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, +}; |