From 17a0c14164dc0bab8b09a910c567c74bb838eab5 Mon Sep 17 00:00:00 2001 From: Álvaro Fernández Rojas Date: Tue, 16 May 2017 18:29:13 +0200 Subject: dm: sysreset: add watchdog-reboot driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Simon Glass --- drivers/sysreset/sysreset_watchdog.c | 60 ++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 drivers/sysreset/sysreset_watchdog.c (limited to 'drivers/sysreset/sysreset_watchdog.c') 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 + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include + +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, +}; -- cgit v1.2.3