17a0c14164
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>
61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
/*
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* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <sysreset.h>
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#include <wdt.h>
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struct wdt_reboot_priv {
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struct udevice *wdt;
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};
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static int wdt_reboot_request(struct udevice *dev, enum sysreset_t type)
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{
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struct wdt_reboot_priv *priv = dev_get_priv(dev);
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int ret;
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ret = wdt_expire_now(priv->wdt, 0);
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if (ret)
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return ret;
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return -EINPROGRESS;
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}
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static struct sysreset_ops wdt_reboot_ops = {
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.request = wdt_reboot_request,
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};
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int wdt_reboot_probe(struct udevice *dev)
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{
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struct wdt_reboot_priv *priv = dev_get_priv(dev);
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int err;
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err = uclass_get_device_by_phandle(UCLASS_WDT, dev,
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"wdt", &priv->wdt);
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if (err) {
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error("unable to find wdt device\n");
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return err;
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}
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return 0;
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}
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static const struct udevice_id wdt_reboot_ids[] = {
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{ .compatible = "wdt-reboot" },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(wdt_reboot) = {
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.name = "wdt_reboot",
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.id = UCLASS_SYSRESET,
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.of_match = wdt_reboot_ids,
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.ops = &wdt_reboot_ops,
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.priv_auto_alloc_size = sizeof(struct wdt_reboot_priv),
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.probe = wdt_reboot_probe,
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};
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