1 // SPDX-License-Identifier: GPL-2.0
8 #include <power-domain-uclass.h>
10 #include <asm/arch/power-domain.h>
11 #include <dm/device-internal.h>
12 #include <dm/device.h>
13 #include <asm/arch/sci/sci.h>
15 DECLARE_GLOBAL_DATA_PTR;
17 struct imx8_power_domain_priv {
21 static int imx8_power_domain_request(struct power_domain *power_domain)
23 debug("%s(power_domain=%p)\n", __func__, power_domain);
28 static int imx8_power_domain_free(struct power_domain *power_domain)
30 debug("%s(power_domain=%p)\n", __func__, power_domain);
35 static int imx8_power_domain_on(struct power_domain *power_domain)
37 struct udevice *dev = power_domain->dev;
38 struct imx8_power_domain_platdata *pdata;
39 struct imx8_power_domain_priv *ppriv;
43 struct power_domain parent_domain;
44 struct udevice *parent = dev_get_parent(dev);
46 /* Need to power on parent node first */
47 if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
48 parent_domain.dev = parent;
49 err = imx8_power_domain_on(&parent_domain);
54 pdata = (struct imx8_power_domain_platdata *)dev_get_platdata(dev);
55 ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
57 debug("%s(power_domain=%s) resource_id %d\n", __func__, dev->name,
60 /* Already powered on */
64 if (pdata->resource_id != SC_R_LAST) {
65 ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
68 printf("Error: %s Power up failed! (error = %d)\n",
74 ppriv->state_on = true;
75 debug("%s is powered on\n", dev->name);
80 static int imx8_power_domain_off_node(struct power_domain *power_domain)
82 struct udevice *dev = power_domain->dev;
83 struct udevice *child;
84 struct imx8_power_domain_priv *ppriv;
85 struct imx8_power_domain_priv *child_ppriv;
86 struct imx8_power_domain_platdata *pdata;
89 ppriv = dev_get_priv(dev);
90 pdata = dev_get_platdata(dev);
92 debug("%s, %s, state_on %d\n", __func__, dev->name, ppriv->state_on);
94 /* Already powered off */
98 /* Check if all subnodes are off */
99 for (device_find_first_child(dev, &child);
101 device_find_next_child(&child)) {
102 if (device_active(child)) {
104 (struct imx8_power_domain_priv *)dev_get_priv(child);
105 if (child_ppriv->state_on)
110 if (pdata->resource_id != SC_R_LAST) {
111 if (!sc_rm_is_resource_owned(-1, pdata->resource_id)) {
112 printf("%s not owned by curr partition\n", dev->name);
115 ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
118 printf("Error: %s Power off failed! (error = %d)\n",
124 ppriv->state_on = false;
125 debug("%s is powered off\n", dev->name);
130 static int imx8_power_domain_off_parentnodes(struct power_domain *power_domain)
132 struct udevice *dev = power_domain->dev;
133 struct udevice *parent = dev_get_parent(dev);
134 struct udevice *child;
135 struct imx8_power_domain_priv *ppriv;
136 struct imx8_power_domain_priv *child_ppriv;
137 struct imx8_power_domain_platdata *pdata;
139 struct power_domain parent_pd;
141 if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
143 (struct imx8_power_domain_platdata *)dev_get_platdata(parent);
144 ppriv = (struct imx8_power_domain_priv *)dev_get_priv(parent);
146 debug("%s, %s, state_on %d\n", __func__, parent->name,
149 /* Already powered off */
150 if (!ppriv->state_on)
154 * Check if all sibling nodes are off. If yes,
157 for (device_find_first_child(parent, &child); child;
158 device_find_next_child(&child)) {
159 if (device_active(child)) {
160 child_ppriv = (struct imx8_power_domain_priv *)
162 /* Find a power on sibling */
163 if (child_ppriv->state_on) {
164 debug("sibling %s, state_on %d\n",
166 child_ppriv->state_on);
172 /* power off parent */
173 if (pdata->resource_id != SC_R_LAST) {
174 ret = sc_pm_set_resource_power_mode(-1,
178 printf("%s Power off failed! (error = %d)\n",
184 ppriv->state_on = false;
185 debug("%s is powered off\n", parent->name);
187 parent_pd.dev = parent;
188 imx8_power_domain_off_parentnodes(&parent_pd);
194 static int imx8_power_domain_off(struct power_domain *power_domain)
198 debug("%s(power_domain=%p)\n", __func__, power_domain);
200 /* Turn off the node */
201 ret = imx8_power_domain_off_node(power_domain);
203 debug("Can't power off the node of dev %s, ret = %d\n",
204 power_domain->dev->name, ret);
208 /* Turn off parent nodes, if sibling nodes are all off */
209 ret = imx8_power_domain_off_parentnodes(power_domain);
211 printf("Failed to power off parent nodes of dev %s, ret = %d\n",
212 power_domain->dev->name, ret);
219 static int imx8_power_domain_of_xlate(struct power_domain *power_domain,
220 struct ofnode_phandle_args *args)
222 debug("%s(power_domain=%p)\n", __func__, power_domain);
224 /* Do nothing to the xlate, since we don't have args used */
229 static int imx8_power_domain_bind(struct udevice *dev)
235 debug("%s(dev=%p)\n", __func__, dev);
237 offset = dev_of_offset(dev);
238 for (offset = fdt_first_subnode(gd->fdt_blob, offset); offset > 0;
239 offset = fdt_next_subnode(gd->fdt_blob, offset)) {
240 /* Bind the subnode to this driver */
241 name = fdt_get_name(gd->fdt_blob, offset, NULL);
243 ret = device_bind_with_driver_data(dev, dev->driver, name,
245 offset_to_ofnode(offset),
249 printf("Driver '%s' refuses to bind\n",
253 printf("Error binding driver '%s': %d\n",
254 dev->driver->name, ret);
260 static int imx8_power_domain_probe(struct udevice *dev)
262 struct imx8_power_domain_priv *ppriv;
264 debug("%s(dev=%s)\n", __func__, dev->name);
266 ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
268 /* Set default to power off */
270 ppriv->state_on = false;
275 static int imx8_power_domain_ofdata_to_platdata(struct udevice *dev)
278 struct imx8_power_domain_platdata *pdata = dev_get_platdata(dev);
280 reg = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", -1);
282 debug("%s: Invalid resource id %d\n", __func__, reg);
285 pdata->resource_id = (sc_rsrc_t)reg;
287 debug("%s resource_id %d\n", __func__, pdata->resource_id);
292 static const struct udevice_id imx8_power_domain_ids[] = {
293 { .compatible = "nxp,imx8-pd" },
297 struct power_domain_ops imx8_power_domain_ops = {
298 .request = imx8_power_domain_request,
299 .rfree = imx8_power_domain_free,
300 .on = imx8_power_domain_on,
301 .off = imx8_power_domain_off,
302 .of_xlate = imx8_power_domain_of_xlate,
305 U_BOOT_DRIVER(imx8_power_domain) = {
306 .name = "imx8_power_domain",
307 .id = UCLASS_POWER_DOMAIN,
308 .of_match = imx8_power_domain_ids,
309 .bind = imx8_power_domain_bind,
310 .probe = imx8_power_domain_probe,
311 .ofdata_to_platdata = imx8_power_domain_ofdata_to_platdata,
312 .platdata_auto_alloc_size = sizeof(struct imx8_power_domain_platdata),
313 .priv_auto_alloc_size = sizeof(struct imx8_power_domain_priv),
314 .ops = &imx8_power_domain_ops,