1*694b0524SAndreas Dannenberg // SPDX-License-Identifier: GPL-2.0+
2*694b0524SAndreas Dannenberg /*
3*694b0524SAndreas Dannenberg * Texas Instruments System Control Interface (TI SCI) system reset driver
4*694b0524SAndreas Dannenberg *
5*694b0524SAndreas Dannenberg * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
6*694b0524SAndreas Dannenberg * Andreas Dannenberg <dannenberg@ti.com>
7*694b0524SAndreas Dannenberg */
8*694b0524SAndreas Dannenberg
9*694b0524SAndreas Dannenberg #include <common.h>
10*694b0524SAndreas Dannenberg #include <dm.h>
11*694b0524SAndreas Dannenberg #include <errno.h>
12*694b0524SAndreas Dannenberg #include <sysreset.h>
13*694b0524SAndreas Dannenberg #include <linux/soc/ti/ti_sci_protocol.h>
14*694b0524SAndreas Dannenberg
15*694b0524SAndreas Dannenberg /**
16*694b0524SAndreas Dannenberg * struct ti_sci_sysreset_data - sysreset controller information structure
17*694b0524SAndreas Dannenberg * @sci: TI SCI handle used for communication with system controller
18*694b0524SAndreas Dannenberg */
19*694b0524SAndreas Dannenberg struct ti_sci_sysreset_data {
20*694b0524SAndreas Dannenberg const struct ti_sci_handle *sci;
21*694b0524SAndreas Dannenberg };
22*694b0524SAndreas Dannenberg
ti_sci_sysreset_probe(struct udevice * dev)23*694b0524SAndreas Dannenberg static int ti_sci_sysreset_probe(struct udevice *dev)
24*694b0524SAndreas Dannenberg {
25*694b0524SAndreas Dannenberg struct ti_sci_sysreset_data *data = dev_get_priv(dev);
26*694b0524SAndreas Dannenberg
27*694b0524SAndreas Dannenberg debug("%s(dev=%p)\n", __func__, dev);
28*694b0524SAndreas Dannenberg
29*694b0524SAndreas Dannenberg if (!data)
30*694b0524SAndreas Dannenberg return -ENOMEM;
31*694b0524SAndreas Dannenberg
32*694b0524SAndreas Dannenberg /* Store handle for communication with the system controller */
33*694b0524SAndreas Dannenberg data->sci = ti_sci_get_handle(dev);
34*694b0524SAndreas Dannenberg if (IS_ERR(data->sci))
35*694b0524SAndreas Dannenberg return PTR_ERR(data->sci);
36*694b0524SAndreas Dannenberg
37*694b0524SAndreas Dannenberg return 0;
38*694b0524SAndreas Dannenberg }
39*694b0524SAndreas Dannenberg
ti_sci_sysreset_request(struct udevice * dev,enum sysreset_t type)40*694b0524SAndreas Dannenberg static int ti_sci_sysreset_request(struct udevice *dev, enum sysreset_t type)
41*694b0524SAndreas Dannenberg {
42*694b0524SAndreas Dannenberg struct ti_sci_sysreset_data *data = dev_get_priv(dev);
43*694b0524SAndreas Dannenberg const struct ti_sci_handle *sci = data->sci;
44*694b0524SAndreas Dannenberg const struct ti_sci_core_ops *cops = &sci->ops.core_ops;
45*694b0524SAndreas Dannenberg int ret;
46*694b0524SAndreas Dannenberg
47*694b0524SAndreas Dannenberg debug("%s(dev=%p, type=%d)\n", __func__, dev, type);
48*694b0524SAndreas Dannenberg
49*694b0524SAndreas Dannenberg ret = cops->reboot_device(sci);
50*694b0524SAndreas Dannenberg if (ret)
51*694b0524SAndreas Dannenberg dev_err(rst->dev, "%s: reboot_device failed (%d)\n",
52*694b0524SAndreas Dannenberg __func__, ret);
53*694b0524SAndreas Dannenberg
54*694b0524SAndreas Dannenberg return ret;
55*694b0524SAndreas Dannenberg }
56*694b0524SAndreas Dannenberg
57*694b0524SAndreas Dannenberg static struct sysreset_ops ti_sci_sysreset_ops = {
58*694b0524SAndreas Dannenberg .request = ti_sci_sysreset_request,
59*694b0524SAndreas Dannenberg };
60*694b0524SAndreas Dannenberg
61*694b0524SAndreas Dannenberg static const struct udevice_id ti_sci_sysreset_of_match[] = {
62*694b0524SAndreas Dannenberg { .compatible = "ti,sci-sysreset", },
63*694b0524SAndreas Dannenberg { /* sentinel */ },
64*694b0524SAndreas Dannenberg };
65*694b0524SAndreas Dannenberg
66*694b0524SAndreas Dannenberg U_BOOT_DRIVER(ti_sci_sysreset) = {
67*694b0524SAndreas Dannenberg .name = "ti-sci-sysreset",
68*694b0524SAndreas Dannenberg .id = UCLASS_SYSRESET,
69*694b0524SAndreas Dannenberg .of_match = ti_sci_sysreset_of_match,
70*694b0524SAndreas Dannenberg .probe = ti_sci_sysreset_probe,
71*694b0524SAndreas Dannenberg .priv_auto_alloc_size = sizeof(struct ti_sci_sysreset_data),
72*694b0524SAndreas Dannenberg .ops = &ti_sci_sysreset_ops,
73*694b0524SAndreas Dannenberg };
74