2 * Copyright (c) 2016, NVIDIA CORPORATION.
4 * SPDX-License-Identifier: GPL-2.0
11 #include <reset-uclass.h>
13 static inline struct reset_ops *reset_dev_ops(struct udevice *dev)
15 return (struct reset_ops *)dev->driver->ops;
18 static int reset_of_xlate_default(struct reset_ctl *reset_ctl,
19 struct ofnode_phandle_args *args)
21 debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
23 if (args->args_count != 1) {
24 debug("Invaild args_count: %d\n", args->args_count);
28 reset_ctl->id = args->args[0];
33 int reset_get_by_index(struct udevice *dev, int index,
34 struct reset_ctl *reset_ctl)
36 struct ofnode_phandle_args args;
38 struct udevice *dev_reset;
39 struct reset_ops *ops;
41 debug("%s(dev=%p, index=%d, reset_ctl=%p)\n", __func__, dev, index,
43 reset_ctl->dev = NULL;
45 ret = dev_read_phandle_with_args(dev, "resets", "#reset-cells", 0,
48 debug("%s: fdtdec_parse_phandle_with_args() failed: %d\n",
53 ret = uclass_get_device_by_ofnode(UCLASS_RESET, args.node,
56 debug("%s: uclass_get_device_by_ofnode() failed: %d\n",
58 debug("%s %d\n", ofnode_get_name(args.node), args.args[0]);
61 ops = reset_dev_ops(dev_reset);
63 reset_ctl->dev = dev_reset;
65 ret = ops->of_xlate(reset_ctl, &args);
67 ret = reset_of_xlate_default(reset_ctl, &args);
69 debug("of_xlate() failed: %d\n", ret);
73 ret = ops->request(reset_ctl);
75 debug("ops->request() failed: %d\n", ret);
82 int reset_get_bulk(struct udevice *dev, struct reset_ctl_bulk *bulk)
84 int i, ret, err, count;
88 count = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
92 bulk->resets = devm_kcalloc(dev, count, sizeof(struct reset_ctl),
97 for (i = 0; i < count; i++) {
98 ret = reset_get_by_index(dev, i, &bulk->resets[i]);
108 err = reset_release_all(bulk->resets, bulk->count);
110 debug("%s: could release all resets for %p\n",
116 int reset_get_by_name(struct udevice *dev, const char *name,
117 struct reset_ctl *reset_ctl)
121 debug("%s(dev=%p, name=%s, reset_ctl=%p)\n", __func__, dev, name,
123 reset_ctl->dev = NULL;
125 index = dev_read_stringlist_search(dev, "reset-names", name);
127 debug("fdt_stringlist_search() failed: %d\n", index);
131 return reset_get_by_index(dev, index, reset_ctl);
134 int reset_request(struct reset_ctl *reset_ctl)
136 struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
138 debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
140 return ops->request(reset_ctl);
143 int reset_free(struct reset_ctl *reset_ctl)
145 struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
147 debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
149 return ops->free(reset_ctl);
152 int reset_assert(struct reset_ctl *reset_ctl)
154 struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
156 debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
158 return ops->rst_assert(reset_ctl);
161 int reset_assert_bulk(struct reset_ctl_bulk *bulk)
165 for (i = 0; i < bulk->count; i++) {
166 ret = reset_assert(&bulk->resets[i]);
174 int reset_deassert(struct reset_ctl *reset_ctl)
176 struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
178 debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
180 return ops->rst_deassert(reset_ctl);
183 int reset_deassert_bulk(struct reset_ctl_bulk *bulk)
187 for (i = 0; i < bulk->count; i++) {
188 ret = reset_deassert(&bulk->resets[i]);
196 int reset_release_all(struct reset_ctl *reset_ctl, int count)
200 for (i = 0; i < count; i++) {
201 debug("%s(reset_ctl[%d]=%p)\n", __func__, i, &reset_ctl[i]);
203 /* check if reset has been previously requested */
204 if (!reset_ctl[i].dev)
207 ret = reset_assert(&reset_ctl[i]);
211 ret = reset_free(&reset_ctl[i]);
219 UCLASS_DRIVER(reset) = {