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6#include <common.h>
7#include <dm.h>
8#include <power-domain-uclass.h>
9#include <asm/io.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>
14
15DECLARE_GLOBAL_DATA_PTR;
16
17struct imx8_power_domain_priv {
18 bool state_on;
19};
20
21static int imx8_power_domain_request(struct power_domain *power_domain)
22{
23 debug("%s(power_domain=%p)\n", __func__, power_domain);
24
25 return 0;
26}
27
28static int imx8_power_domain_free(struct power_domain *power_domain)
29{
30 debug("%s(power_domain=%p)\n", __func__, power_domain);
31
32 return 0;
33}
34
35static int imx8_power_domain_on(struct power_domain *power_domain)
36{
37 struct udevice *dev = power_domain->dev;
38 struct imx8_power_domain_platdata *pdata;
39 struct imx8_power_domain_priv *ppriv;
40 sc_err_t ret;
41 int err;
42
43 struct power_domain parent_domain;
44 struct udevice *parent = dev_get_parent(dev);
45
46
47 if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
48 parent_domain.dev = parent;
49 err = imx8_power_domain_on(&parent_domain);
50 if (err)
51 return err;
52 }
53
54 pdata = (struct imx8_power_domain_platdata *)dev_get_platdata(dev);
55 ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
56
57 debug("%s(power_domain=%s) resource_id %d\n", __func__, dev->name,
58 pdata->resource_id);
59
60
61 if (ppriv->state_on)
62 return 0;
63
64 if (pdata->resource_id != SC_R_LAST) {
65 ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
66 SC_PM_PW_MODE_ON);
67 if (ret) {
68 printf("Error: %s Power up failed! (error = %d)\n",
69 dev->name, ret);
70 return -EIO;
71 }
72 }
73
74 ppriv->state_on = true;
75 debug("%s is powered on\n", dev->name);
76
77 return 0;
78}
79
80static int imx8_power_domain_off_node(struct power_domain *power_domain)
81{
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;
87 sc_err_t ret;
88
89 ppriv = dev_get_priv(dev);
90 pdata = dev_get_platdata(dev);
91
92 debug("%s, %s, state_on %d\n", __func__, dev->name, ppriv->state_on);
93
94
95 if (!ppriv->state_on)
96 return 0;
97
98
99 for (device_find_first_child(dev, &child);
100 child;
101 device_find_next_child(&child)) {
102 if (device_active(child)) {
103 child_ppriv =
104 (struct imx8_power_domain_priv *)dev_get_priv(child);
105 if (child_ppriv->state_on)
106 return -EPERM;
107 }
108 }
109
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);
113 return 0;
114 }
115 ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
116 SC_PM_PW_MODE_OFF);
117 if (ret) {
118 printf("Error: %s Power off failed! (error = %d)\n",
119 dev->name, ret);
120 return -EIO;
121 }
122 }
123
124 ppriv->state_on = false;
125 debug("%s is powered off\n", dev->name);
126
127 return 0;
128}
129
130static int imx8_power_domain_off_parentnodes(struct power_domain *power_domain)
131{
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;
138 sc_err_t ret;
139 struct power_domain parent_pd;
140
141 if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
142 pdata =
143 (struct imx8_power_domain_platdata *)dev_get_platdata(parent);
144 ppriv = (struct imx8_power_domain_priv *)dev_get_priv(parent);
145
146 debug("%s, %s, state_on %d\n", __func__, parent->name,
147 ppriv->state_on);
148
149
150 if (!ppriv->state_on)
151 return 0;
152
153
154
155
156
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 *)
161 dev_get_priv(child);
162
163 if (child_ppriv->state_on) {
164 debug("sibling %s, state_on %d\n",
165 child->name,
166 child_ppriv->state_on);
167 return 0;
168 }
169 }
170 }
171
172
173 if (pdata->resource_id != SC_R_LAST) {
174 ret = sc_pm_set_resource_power_mode(-1,
175 pdata->resource_id,
176 SC_PM_PW_MODE_OFF);
177 if (ret) {
178 printf("%s Power off failed! (error = %d)\n",
179 parent->name, ret);
180 return -EIO;
181 }
182 }
183
184 ppriv->state_on = false;
185 debug("%s is powered off\n", parent->name);
186
187 parent_pd.dev = parent;
188 imx8_power_domain_off_parentnodes(&parent_pd);
189 }
190
191 return 0;
192}
193
194static int imx8_power_domain_off(struct power_domain *power_domain)
195{
196 int ret;
197
198 debug("%s(power_domain=%p)\n", __func__, power_domain);
199
200
201 ret = imx8_power_domain_off_node(power_domain);
202 if (ret) {
203 debug("Can't power off the node of dev %s, ret = %d\n",
204 power_domain->dev->name, ret);
205 return ret;
206 }
207
208
209 ret = imx8_power_domain_off_parentnodes(power_domain);
210 if (ret) {
211 printf("Failed to power off parent nodes of dev %s, ret = %d\n",
212 power_domain->dev->name, ret);
213 return ret;
214 }
215
216 return 0;
217}
218
219static int imx8_power_domain_of_xlate(struct power_domain *power_domain,
220 struct ofnode_phandle_args *args)
221{
222 debug("%s(power_domain=%p)\n", __func__, power_domain);
223
224
225
226 return 0;
227}
228
229static int imx8_power_domain_bind(struct udevice *dev)
230{
231 int offset;
232 const char *name;
233 int ret = 0;
234
235 debug("%s(dev=%p)\n", __func__, dev);
236
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
241 name = fdt_get_name(gd->fdt_blob, offset, NULL);
242
243 ret = device_bind_with_driver_data(dev, dev->driver, name,
244 dev->driver_data,
245 offset_to_ofnode(offset),
246 NULL);
247
248 if (ret == -ENODEV)
249 printf("Driver '%s' refuses to bind\n",
250 dev->driver->name);
251
252 if (ret)
253 printf("Error binding driver '%s': %d\n",
254 dev->driver->name, ret);
255 }
256
257 return 0;
258}
259
260static int imx8_power_domain_probe(struct udevice *dev)
261{
262 struct imx8_power_domain_priv *ppriv;
263
264 debug("%s(dev=%s)\n", __func__, dev->name);
265
266 ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
267
268
269 if (ppriv)
270 ppriv->state_on = false;
271
272 return 0;
273}
274
275static int imx8_power_domain_ofdata_to_platdata(struct udevice *dev)
276{
277 int reg;
278 struct imx8_power_domain_platdata *pdata = dev_get_platdata(dev);
279
280 reg = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", -1);
281 if (reg == -1) {
282 debug("%s: Invalid resource id %d\n", __func__, reg);
283 return -EINVAL;
284 }
285 pdata->resource_id = (sc_rsrc_t)reg;
286
287 debug("%s resource_id %d\n", __func__, pdata->resource_id);
288
289 return 0;
290}
291
292static const struct udevice_id imx8_power_domain_ids[] = {
293 { .compatible = "nxp,imx8-pd" },
294 { }
295};
296
297struct power_domain_ops imx8_power_domain_ops = {
298 .request = imx8_power_domain_request,
299 .free = imx8_power_domain_free,
300 .on = imx8_power_domain_on,
301 .off = imx8_power_domain_off,
302 .of_xlate = imx8_power_domain_of_xlate,
303};
304
305U_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,
315};
316
