2 * Copyright (c) 2016, NVIDIA CORPORATION.
4 * SPDX-License-Identifier: GPL-2.0
11 #include <reset-uclass.h>
13 DECLARE_GLOBAL_DATA_PTR;
15 static inline struct reset_ops *reset_dev_ops(struct udevice *dev)
17 return (struct reset_ops *)dev->driver->ops;
20 static int reset_of_xlate_default(struct reset_ctl *reset_ctl,
21 struct ofnode_phandle_args *args)
23 debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
25 if (args->args_count != 1) {
26 debug("Invaild args_count: %d\n", args->args_count);
30 reset_ctl->id = args->args[0];
35 int reset_get_by_index(struct udevice *dev, int index,
36 struct reset_ctl *reset_ctl)
38 struct ofnode_phandle_args args;
40 struct udevice *dev_reset;
41 struct reset_ops *ops;
43 debug("%s(dev=%p, index=%d, reset_ctl=%p)\n", __func__, dev, index,
45 reset_ctl->dev = NULL;
47 ret = dev_read_phandle_with_args(dev, "resets", "#reset-cells", 0,
50 debug("%s: fdtdec_parse_phandle_with_args() failed: %d\n",
55 ret = uclass_get_device_by_ofnode(UCLASS_RESET, args.node,
58 debug("%s: uclass_get_device_by_ofnode() failed: %d\n",
60 debug("%s %d\n", ofnode_get_name(args.node), args.args[0]);
63 ops = reset_dev_ops(dev_reset);
65 reset_ctl->dev = dev_reset;
67 ret = ops->of_xlate(reset_ctl, &args);
69 ret = reset_of_xlate_default(reset_ctl, &args);
71 debug("of_xlate() failed: %d\n", ret);
75 ret = ops->request(reset_ctl);
77 debug("ops->request() failed: %d\n", ret);
84 int reset_get_bulk(struct udevice *dev, struct reset_ctl_bulk *bulk)
86 int i, ret, err, count;
90 count = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
94 bulk->resets = devm_kcalloc(dev, count, sizeof(struct reset_ctl),
99 for (i = 0; i < count; i++) {
100 ret = reset_get_by_index(dev, i, &bulk->resets[i]);
110 err = reset_release_all(bulk->resets, bulk->count);
112 debug("%s: could release all resets for %p\n",
118 int reset_get_by_name(struct udevice *dev, const char *name,
119 struct reset_ctl *reset_ctl)
123 debug("%s(dev=%p, name=%s, reset_ctl=%p)\n", __func__, dev, name,
125 reset_ctl->dev = NULL;
127 index = dev_read_stringlist_search(dev, "reset-names", name);
129 debug("fdt_stringlist_search() failed: %d\n", index);
133 return reset_get_by_index(dev, index, reset_ctl);
136 int reset_request(struct reset_ctl *reset_ctl)
138 struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
140 debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
142 return ops->request(reset_ctl);
145 int reset_free(struct reset_ctl *reset_ctl)
147 struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
149 debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
151 return ops->free(reset_ctl);
154 int reset_assert(struct reset_ctl *reset_ctl)
156 struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
158 debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
160 return ops->rst_assert(reset_ctl);
163 int reset_assert_bulk(struct reset_ctl_bulk *bulk)
167 for (i = 0; i < bulk->count; i++) {
168 ret = reset_assert(&bulk->resets[i]);
176 int reset_deassert(struct reset_ctl *reset_ctl)
178 struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
180 debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
182 return ops->rst_deassert(reset_ctl);
185 int reset_deassert_bulk(struct reset_ctl_bulk *bulk)
189 for (i = 0; i < bulk->count; i++) {
190 ret = reset_deassert(&bulk->resets[i]);
198 int reset_release_all(struct reset_ctl *reset_ctl, int count)
202 for (i = 0; i < count; i++) {
203 debug("%s(reset_ctl[%d]=%p)\n", __func__, i, &reset_ctl[i]);
205 /* check if reset has been previously requested */
206 if (!reset_ctl[i].dev)
209 ret = reset_assert(&reset_ctl[i]);
213 ret = reset_free(&reset_ctl[i]);
221 UCLASS_DRIVER(reset) = {