1 // SPDX-License-Identifier: GPL-2.0+
3 * Texas Instruments System Control Interface (TI SCI) power domain driver
5 * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
6 * Andreas Dannenberg <dannenberg@ti.com>
8 * Loosely based on Linux kernel ti_sci_pm_domains.c...
14 #include <power-domain-uclass.h>
15 #include <linux/soc/ti/ti_sci_protocol.h>
18 * struct ti_sci_power_domain_data - pm domain controller information structure
19 * @sci: TI SCI handle used for communication with system controller
21 struct ti_sci_power_domain_data {
22 const struct ti_sci_handle *sci;
25 static int ti_sci_power_domain_probe(struct udevice *dev)
27 struct ti_sci_power_domain_data *data = dev_get_priv(dev);
29 debug("%s(dev=%p)\n", __func__, dev);
34 /* Store handle for communication with the system controller */
35 data->sci = ti_sci_get_handle(dev);
36 if (IS_ERR(data->sci))
37 return PTR_ERR(data->sci);
42 static int ti_sci_power_domain_request(struct power_domain *pd)
44 debug("%s(pd=%p)\n", __func__, pd);
48 static int ti_sci_power_domain_free(struct power_domain *pd)
50 debug("%s(pd=%p)\n", __func__, pd);
54 static int ti_sci_power_domain_on(struct power_domain *pd)
56 struct ti_sci_power_domain_data *data = dev_get_priv(pd->dev);
57 const struct ti_sci_handle *sci = data->sci;
58 const struct ti_sci_dev_ops *dops = &sci->ops.dev_ops;
61 debug("%s(pd=%p)\n", __func__, pd);
63 ret = dops->get_device(sci, pd->id);
65 dev_err(power_domain->dev, "%s: get_device failed (%d)\n",
71 static int ti_sci_power_domain_off(struct power_domain *pd)
73 struct ti_sci_power_domain_data *data = dev_get_priv(pd->dev);
74 const struct ti_sci_handle *sci = data->sci;
75 const struct ti_sci_dev_ops *dops = &sci->ops.dev_ops;
78 debug("%s(pd=%p)\n", __func__, pd);
80 ret = dops->put_device(sci, pd->id);
82 dev_err(power_domain->dev, "%s: put_device failed (%d)\n",
88 static const struct udevice_id ti_sci_power_domain_of_match[] = {
89 { .compatible = "ti,sci-pm-domain" },
93 static struct power_domain_ops ti_sci_power_domain_ops = {
94 .request = ti_sci_power_domain_request,
95 .free = ti_sci_power_domain_free,
96 .on = ti_sci_power_domain_on,
97 .off = ti_sci_power_domain_off,
100 U_BOOT_DRIVER(ti_sci_pm_domains) = {
101 .name = "ti-sci-pm-domains",
102 .id = UCLASS_POWER_DOMAIN,
103 .of_match = ti_sci_power_domain_of_match,
104 .probe = ti_sci_power_domain_probe,
105 .priv_auto_alloc_size = sizeof(struct ti_sci_power_domain_data),
106 .ops = &ti_sci_power_domain_ops,