1 // SPDX-License-Identifier: GPL-2.0
9 #include <power-domain-uclass.h>
11 #include <asm/arch/power-domain.h>
12 #include <dm/device-internal.h>
13 #include <dm/device.h>
14 #include <asm/arch/sci/sci.h>
16 DECLARE_GLOBAL_DATA_PTR;
18 struct imx8_power_domain_priv {
22 static int imx8_power_domain_request(struct power_domain *power_domain)
24 debug("%s(power_domain=%p)\n", __func__, power_domain);
29 static int imx8_power_domain_free(struct power_domain *power_domain)
31 debug("%s(power_domain=%p)\n", __func__, power_domain);
36 static int imx8_power_domain_on(struct power_domain *power_domain)
38 struct udevice *dev = power_domain->dev;
39 struct imx8_power_domain_platdata *pdata;
40 struct imx8_power_domain_priv *ppriv;
44 struct power_domain parent_domain;
45 struct udevice *parent = dev_get_parent(dev);
47 /* Need to power on parent node first */
48 if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
49 parent_domain.dev = parent;
50 err = imx8_power_domain_on(&parent_domain);
55 pdata = (struct imx8_power_domain_platdata *)dev_get_platdata(dev);
56 ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
58 debug("%s(power_domain=%s) resource_id %d\n", __func__, dev->name,
61 /* Already powered on */
65 if (pdata->resource_id != SC_R_LAST) {
66 ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
69 printf("Error: %s Power up failed! (error = %d)\n",
75 ppriv->state_on = true;
76 debug("%s is powered on\n", dev->name);
81 static int imx8_power_domain_off_node(struct power_domain *power_domain)
83 struct udevice *dev = power_domain->dev;
84 struct udevice *child;
85 struct imx8_power_domain_priv *ppriv;
86 struct imx8_power_domain_priv *child_ppriv;
87 struct imx8_power_domain_platdata *pdata;
90 ppriv = dev_get_priv(dev);
91 pdata = dev_get_platdata(dev);
93 debug("%s, %s, state_on %d\n", __func__, dev->name, ppriv->state_on);
95 /* Already powered off */
99 /* Check if all subnodes are off */
100 for (device_find_first_child(dev, &child);
102 device_find_next_child(&child)) {
103 if (device_active(child)) {
105 (struct imx8_power_domain_priv *)dev_get_priv(child);
106 if (child_ppriv->state_on)
111 if (pdata->resource_id != SC_R_LAST) {
112 if (!sc_rm_is_resource_owned(-1, pdata->resource_id)) {
113 printf("%s not owned by curr partition\n", dev->name);
116 ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
119 printf("Error: %s Power off failed! (error = %d)\n",
125 ppriv->state_on = false;
126 debug("%s is powered off\n", dev->name);
131 static int imx8_power_domain_off_parentnodes(struct power_domain *power_domain)
133 struct udevice *dev = power_domain->dev;
134 struct udevice *parent = dev_get_parent(dev);
135 struct udevice *child;
136 struct imx8_power_domain_priv *ppriv;
137 struct imx8_power_domain_priv *child_ppriv;
138 struct imx8_power_domain_platdata *pdata;
140 struct power_domain parent_pd;
142 if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
144 (struct imx8_power_domain_platdata *)dev_get_platdata(parent);
145 ppriv = (struct imx8_power_domain_priv *)dev_get_priv(parent);
147 debug("%s, %s, state_on %d\n", __func__, parent->name,
150 /* Already powered off */
151 if (!ppriv->state_on)
155 * Check if all sibling nodes are off. If yes,
158 for (device_find_first_child(parent, &child); child;
159 device_find_next_child(&child)) {
160 if (device_active(child)) {
161 child_ppriv = (struct imx8_power_domain_priv *)
163 /* Find a power on sibling */
164 if (child_ppriv->state_on) {
165 debug("sibling %s, state_on %d\n",
167 child_ppriv->state_on);
173 /* power off parent */
174 if (pdata->resource_id != SC_R_LAST) {
175 ret = sc_pm_set_resource_power_mode(-1,
179 printf("%s Power off failed! (error = %d)\n",
185 ppriv->state_on = false;
186 debug("%s is powered off\n", parent->name);
188 parent_pd.dev = parent;
189 imx8_power_domain_off_parentnodes(&parent_pd);
195 static int imx8_power_domain_off(struct power_domain *power_domain)
199 debug("%s(power_domain=%p)\n", __func__, power_domain);
201 /* Turn off the node */
202 ret = imx8_power_domain_off_node(power_domain);
204 debug("Can't power off the node of dev %s, ret = %d\n",
205 power_domain->dev->name, ret);
209 /* Turn off parent nodes, if sibling nodes are all off */
210 ret = imx8_power_domain_off_parentnodes(power_domain);
212 printf("Failed to power off parent nodes of dev %s, ret = %d\n",
213 power_domain->dev->name, ret);
220 static int imx8_power_domain_of_xlate(struct power_domain *power_domain,
221 struct ofnode_phandle_args *args)
223 debug("%s(power_domain=%p)\n", __func__, power_domain);
225 /* Do nothing to the xlate, since we don't have args used */
230 static int imx8_power_domain_bind(struct udevice *dev)
236 debug("%s(dev=%p)\n", __func__, dev);
238 offset = dev_of_offset(dev);
239 for (offset = fdt_first_subnode(gd->fdt_blob, offset); offset > 0;
240 offset = fdt_next_subnode(gd->fdt_blob, offset)) {
241 /* Bind the subnode to this driver */
242 name = fdt_get_name(gd->fdt_blob, offset, NULL);
244 ret = device_bind_with_driver_data(dev, dev->driver, name,
246 offset_to_ofnode(offset),
250 printf("Driver '%s' refuses to bind\n",
254 printf("Error binding driver '%s': %d\n",
255 dev->driver->name, ret);
261 static int imx8_power_domain_probe(struct udevice *dev)
263 struct imx8_power_domain_priv *ppriv;
265 debug("%s(dev=%s)\n", __func__, dev->name);
267 ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
269 /* Set default to power off */
271 ppriv->state_on = false;
276 static int imx8_power_domain_ofdata_to_platdata(struct udevice *dev)
279 struct imx8_power_domain_platdata *pdata = dev_get_platdata(dev);
281 reg = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", -1);
283 debug("%s: Invalid resource id %d\n", __func__, reg);
286 pdata->resource_id = (sc_rsrc_t)reg;
288 debug("%s resource_id %d\n", __func__, pdata->resource_id);
293 static const struct udevice_id imx8_power_domain_ids[] = {
294 { .compatible = "nxp,imx8-pd" },
298 struct power_domain_ops imx8_power_domain_ops = {
299 .request = imx8_power_domain_request,
300 .rfree = imx8_power_domain_free,
301 .on = imx8_power_domain_on,
302 .off = imx8_power_domain_off,
303 .of_xlate = imx8_power_domain_of_xlate,
306 U_BOOT_DRIVER(imx8_power_domain) = {
307 .name = "imx8_power_domain",
308 .id = UCLASS_POWER_DOMAIN,
309 .of_match = imx8_power_domain_ids,
310 .bind = imx8_power_domain_bind,
311 .probe = imx8_power_domain_probe,
312 .ofdata_to_platdata = imx8_power_domain_ofdata_to_platdata,
313 .platdata_auto_alloc_size = sizeof(struct imx8_power_domain_platdata),
314 .priv_auto_alloc_size = sizeof(struct imx8_power_domain_priv),
315 .ops = &imx8_power_domain_ops,