2 * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
3 * Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
5 * SPDX-License-Identifier: GPL-2.0+
15 DECLARE_GLOBAL_DATA_PTR;
17 struct sti_sysreset_priv {
21 static int sti_sysreset_request(struct udevice *dev, enum sysreset_t type)
23 struct sti_sysreset_priv *priv = dev_get_priv(dev);
25 generic_clear_bit(0, (void __iomem *)priv->base);
30 static int sti_sysreset_probe(struct udevice *dev)
32 struct sti_sysreset_priv *priv = dev_get_priv(dev);
33 struct udevice *syscon;
34 struct regmap *regmap;
35 struct fdtdec_phandle_args syscfg_phandle;
38 /* get corresponding syscon phandle */
39 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev),
40 "st,syscfg", NULL, 0, 0,
43 pr_err("Can't get syscfg phandle: %d\n", ret);
47 ret = uclass_get_device_by_of_offset(UCLASS_SYSCON,
51 pr_err("%s: uclass_get_device_by_of_offset failed: %d\n",
56 regmap = syscon_get_regmap(syscon);
58 pr_err("unable to get regmap for %s\n", syscon->name);
62 priv->base = regmap->base;
67 static struct sysreset_ops sti_sysreset = {
68 .request = sti_sysreset_request,
71 static const struct udevice_id sti_sysreset_ids[] = {
72 { .compatible = "st,stih407-restart" },
76 U_BOOT_DRIVER(sysreset_sti) = {
77 .name = "sysreset_sti",
78 .id = UCLASS_SYSRESET,
80 .probe = sti_sysreset_probe,
81 .of_match = sti_sysreset_ids,
82 .priv_auto_alloc_size = sizeof(struct sti_sysreset_priv),