2 * Copyright (C) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
4 * Copyright (c) 2016, NVIDIA CORPORATION.
6 * SPDX-License-Identifier: GPL-2.0+
11 #include <clk-uclass.h>
13 #include <dt-structs.h>
16 DECLARE_GLOBAL_DATA_PTR;
18 static inline struct clk_ops *clk_dev_ops(struct udevice *dev)
20 return (struct clk_ops *)dev->driver->ops;
23 #if CONFIG_IS_ENABLED(OF_CONTROL)
24 # if CONFIG_IS_ENABLED(OF_PLATDATA)
25 int clk_get_by_index_platdata(struct udevice *dev, int index,
26 struct phandle_2_cell *cells, struct clk *clk)
32 ret = uclass_get_device(UCLASS_CLK, 0, &clk->dev);
35 clk->id = cells[0].id;
40 static int clk_of_xlate_default(struct clk *clk,
41 struct fdtdec_phandle_args *args)
43 debug("%s(clk=%p)\n", __func__, clk);
45 if (args->args_count > 1) {
46 debug("Invaild args_count: %d\n", args->args_count);
51 clk->id = args->args[0];
58 int clk_get_by_index(struct udevice *dev, int index, struct clk *clk)
61 struct fdtdec_phandle_args args;
62 struct udevice *dev_clk;
65 debug("%s(dev=%p, index=%d, clk=%p)\n", __func__, dev, index, clk);
68 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev),
69 "clocks", "#clock-cells", 0, index,
72 debug("%s: fdtdec_parse_phandle_with_args failed: err=%d\n",
77 ret = uclass_get_device_by_of_offset(UCLASS_CLK, args.node, &dev_clk);
79 debug("%s: uclass_get_device_by_of_offset failed: err=%d\n",
86 ops = clk_dev_ops(dev_clk);
89 ret = ops->of_xlate(clk, &args);
91 ret = clk_of_xlate_default(clk, &args);
93 debug("of_xlate() failed: %d\n", ret);
97 return clk_request(dev_clk, clk);
99 # endif /* OF_PLATDATA */
101 int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk)
105 debug("%s(dev=%p, name=%s, clk=%p)\n", __func__, dev, name, clk);
107 index = fdt_stringlist_search(gd->fdt_blob, dev_of_offset(dev),
108 "clock-names", name);
110 debug("fdt_stringlist_search() failed: %d\n", index);
114 return clk_get_by_index(dev, index, clk);
116 #endif /* OF_CONTROL */
118 int clk_request(struct udevice *dev, struct clk *clk)
120 struct clk_ops *ops = clk_dev_ops(dev);
122 debug("%s(dev=%p, clk=%p)\n", __func__, dev, clk);
129 return ops->request(clk);
132 int clk_free(struct clk *clk)
134 struct clk_ops *ops = clk_dev_ops(clk->dev);
136 debug("%s(clk=%p)\n", __func__, clk);
141 return ops->free(clk);
144 ulong clk_get_rate(struct clk *clk)
146 struct clk_ops *ops = clk_dev_ops(clk->dev);
148 debug("%s(clk=%p)\n", __func__, clk);
153 return ops->get_rate(clk);
156 ulong clk_set_rate(struct clk *clk, ulong rate)
158 struct clk_ops *ops = clk_dev_ops(clk->dev);
160 debug("%s(clk=%p, rate=%lu)\n", __func__, clk, rate);
165 return ops->set_rate(clk, rate);
168 int clk_enable(struct clk *clk)
170 struct clk_ops *ops = clk_dev_ops(clk->dev);
172 debug("%s(clk=%p)\n", __func__, clk);
177 return ops->enable(clk);
180 int clk_disable(struct clk *clk)
182 struct clk_ops *ops = clk_dev_ops(clk->dev);
184 debug("%s(clk=%p)\n", __func__, clk);
189 return ops->disable(clk);
192 UCLASS_DRIVER(clk) = {