2 * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
4 * Derived from linux/drivers/power/reset/syscon-reboot.c:
5 * Copyright (C) 2013, Applied Micro Circuits Corporation
6 * Author: Feng Kan <fkan@apm.com>
8 * SPDX-License-Identifier: GPL-2.0+
18 struct syscon_reboot_priv {
19 struct regmap *regmap;
24 static int syscon_reboot_request(struct udevice *dev, enum sysreset_t type)
26 struct syscon_reboot_priv *priv = dev_get_priv(dev);
28 regmap_write(priv->regmap, priv->offset, priv->mask);
33 static struct sysreset_ops syscon_reboot_ops = {
34 .request = syscon_reboot_request,
37 int syscon_reboot_probe(struct udevice *dev)
39 struct udevice *syscon;
40 struct syscon_reboot_priv *priv = dev_get_priv(dev);
43 err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
46 pr_err("unable to find syscon device\n");
50 priv->regmap = syscon_get_regmap(syscon);
52 pr_err("unable to find regmap\n");
56 priv->offset = dev_read_u32_default(dev, "offset", 0);
57 priv->mask = dev_read_u32_default(dev, "mask", 0);
62 static const struct udevice_id syscon_reboot_ids[] = {
63 { .compatible = "syscon-reboot" },
67 U_BOOT_DRIVER(syscon_reboot) = {
68 .name = "syscon_reboot",
69 .id = UCLASS_SYSRESET,
70 .of_match = syscon_reboot_ids,
71 .probe = syscon_reboot_probe,
72 .priv_auto_alloc_size = sizeof(struct syscon_reboot_priv),
73 .ops = &syscon_reboot_ops,