1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <linux/interconnect-provider.h>
4 #include <linux/device.h>
5 #include <linux/export.h>
6
7 /**
8 * of_icc_bulk_get() - get interconnect paths
9 * @dev: the device requesting the path
10 * @num_paths: the number of icc_bulk_data
11 * @paths: the table with the paths we want to get
12 *
13 * Returns 0 on success or negative errno otherwise.
14 */
of_icc_bulk_get(struct device * dev,int num_paths,struct icc_bulk_data * paths)15 int __must_check of_icc_bulk_get(struct device *dev, int num_paths,
16 struct icc_bulk_data *paths)
17 {
18 int ret, i;
19
20 for (i = 0; i < num_paths; i++) {
21 paths[i].path = of_icc_get(dev, paths[i].name);
22 if (IS_ERR(paths[i].path)) {
23 ret = PTR_ERR(paths[i].path);
24 if (ret != -EPROBE_DEFER)
25 dev_err(dev, "of_icc_get() failed on path %s (%d)\n",
26 paths[i].name, ret);
27 paths[i].path = NULL;
28 goto err;
29 }
30 }
31
32 return 0;
33
34 err:
35 icc_bulk_put(i, paths);
36
37 return ret;
38 }
39 EXPORT_SYMBOL_GPL(of_icc_bulk_get);
40
41 /**
42 * icc_bulk_put() - put a list of interconnect paths
43 * @num_paths: the number of icc_bulk_data
44 * @paths: the icc_bulk_data table with the paths being put
45 */
icc_bulk_put(int num_paths,struct icc_bulk_data * paths)46 void icc_bulk_put(int num_paths, struct icc_bulk_data *paths)
47 {
48 while (--num_paths >= 0) {
49 icc_put(paths[num_paths].path);
50 paths[num_paths].path = NULL;
51 }
52 }
53 EXPORT_SYMBOL_GPL(icc_bulk_put);
54
55 /**
56 * icc_bulk_set_bw() - set bandwidth to a set of paths
57 * @num_paths: the number of icc_bulk_data
58 * @paths: the icc_bulk_data table containing the paths and bandwidth
59 *
60 * Returns 0 on success or negative errno otherwise.
61 */
icc_bulk_set_bw(int num_paths,const struct icc_bulk_data * paths)62 int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths)
63 {
64 int ret = 0;
65 int i;
66
67 for (i = 0; i < num_paths; i++) {
68 ret = icc_set_bw(paths[i].path, paths[i].avg_bw, paths[i].peak_bw);
69 if (ret) {
70 pr_err("icc_set_bw() failed on path %s (%d)\n", paths[i].name, ret);
71 return ret;
72 }
73 }
74
75 return ret;
76 }
77 EXPORT_SYMBOL_GPL(icc_bulk_set_bw);
78
79 /**
80 * icc_bulk_enable() - enable a previously disabled set of paths
81 * @num_paths: the number of icc_bulk_data
82 * @paths: the icc_bulk_data table containing the paths and bandwidth
83 *
84 * Returns 0 on success or negative errno otherwise.
85 */
icc_bulk_enable(int num_paths,const struct icc_bulk_data * paths)86 int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths)
87 {
88 int ret, i;
89
90 for (i = 0; i < num_paths; i++) {
91 ret = icc_enable(paths[i].path);
92 if (ret) {
93 pr_err("icc_enable() failed on path %s (%d)\n", paths[i].name, ret);
94 goto err;
95 }
96 }
97
98 return 0;
99
100 err:
101 icc_bulk_disable(i, paths);
102
103 return ret;
104 }
105 EXPORT_SYMBOL_GPL(icc_bulk_enable);
106
107 /**
108 * icc_bulk_disable() - disable a set of interconnect paths
109 * @num_paths: the number of icc_bulk_data
110 * @paths: the icc_bulk_data table containing the paths and bandwidth
111 */
icc_bulk_disable(int num_paths,const struct icc_bulk_data * paths)112 void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths)
113 {
114 while (--num_paths >= 0)
115 icc_disable(paths[num_paths].path);
116 }
117 EXPORT_SYMBOL_GPL(icc_bulk_disable);
118
119 struct icc_bulk_devres {
120 struct icc_bulk_data *paths;
121 int num_paths;
122 };
123
devm_icc_bulk_release(struct device * dev,void * res)124 static void devm_icc_bulk_release(struct device *dev, void *res)
125 {
126 struct icc_bulk_devres *devres = res;
127
128 icc_bulk_put(devres->num_paths, devres->paths);
129 }
130
131 /**
132 * devm_of_icc_bulk_get() - resource managed of_icc_bulk_get
133 * @dev: the device requesting the path
134 * @num_paths: the number of icc_bulk_data
135 * @paths: the table with the paths we want to get
136 *
137 * Returns 0 on success or negative errno otherwise.
138 */
devm_of_icc_bulk_get(struct device * dev,int num_paths,struct icc_bulk_data * paths)139 int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths)
140 {
141 struct icc_bulk_devres *devres;
142 int ret;
143
144 devres = devres_alloc(devm_icc_bulk_release, sizeof(*devres), GFP_KERNEL);
145 if (!devres)
146 return -ENOMEM;
147
148 ret = of_icc_bulk_get(dev, num_paths, paths);
149 if (!ret) {
150 devres->paths = paths;
151 devres->num_paths = num_paths;
152 devres_add(dev, devres);
153 } else {
154 devres_free(devres);
155 }
156
157 return ret;
158 }
159 EXPORT_SYMBOL_GPL(devm_of_icc_bulk_get);
160