Simon Glass | f26c8a8 | 2015-06-23 15:39:15 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 Google, Inc |
| 3 | * Written by Simon Glass <sjg@chromium.org> |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 4 | * Copyright (c) 2016, NVIDIA CORPORATION. |
Simon Glass | f26c8a8 | 2015-06-23 15:39:15 -0600 | [diff] [blame] | 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0+ |
| 7 | */ |
| 8 | |
| 9 | #include <common.h> |
| 10 | #include <clk.h> |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 11 | #include <clk-uclass.h> |
Simon Glass | f26c8a8 | 2015-06-23 15:39:15 -0600 | [diff] [blame] | 12 | #include <dm.h> |
Simon Glass | 7423daa | 2016-07-04 11:58:03 -0600 | [diff] [blame] | 13 | #include <dt-structs.h> |
Simon Glass | f26c8a8 | 2015-06-23 15:39:15 -0600 | [diff] [blame] | 14 | #include <errno.h> |
Simon Glass | f26c8a8 | 2015-06-23 15:39:15 -0600 | [diff] [blame] | 15 | |
Simon Glass | e70cc43 | 2016-01-20 19:43:02 -0700 | [diff] [blame] | 16 | DECLARE_GLOBAL_DATA_PTR; |
| 17 | |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 18 | static inline struct clk_ops *clk_dev_ops(struct udevice *dev) |
Simon Glass | f26c8a8 | 2015-06-23 15:39:15 -0600 | [diff] [blame] | 19 | { |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 20 | return (struct clk_ops *)dev->driver->ops; |
Simon Glass | f26c8a8 | 2015-06-23 15:39:15 -0600 | [diff] [blame] | 21 | } |
| 22 | |
Simon Glass | e70cc43 | 2016-01-20 19:43:02 -0700 | [diff] [blame] | 23 | #if CONFIG_IS_ENABLED(OF_CONTROL) |
Simon Glass | 7423daa | 2016-07-04 11:58:03 -0600 | [diff] [blame] | 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) |
| 27 | { |
| 28 | int ret; |
| 29 | |
| 30 | if (index != 0) |
| 31 | return -ENOSYS; |
| 32 | ret = uclass_get_device(UCLASS_CLK, 0, &clk->dev); |
| 33 | if (ret) |
| 34 | return ret; |
| 35 | clk->id = cells[0].id; |
| 36 | |
| 37 | return 0; |
| 38 | } |
| 39 | # else |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 40 | static int clk_of_xlate_default(struct clk *clk, |
| 41 | struct fdtdec_phandle_args *args) |
| 42 | { |
| 43 | debug("%s(clk=%p)\n", __func__, clk); |
| 44 | |
| 45 | if (args->args_count > 1) { |
| 46 | debug("Invaild args_count: %d\n", args->args_count); |
| 47 | return -EINVAL; |
| 48 | } |
| 49 | |
| 50 | if (args->args_count) |
| 51 | clk->id = args->args[0]; |
| 52 | else |
| 53 | clk->id = 0; |
| 54 | |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | int clk_get_by_index(struct udevice *dev, int index, struct clk *clk) |
| 59 | { |
| 60 | int ret; |
| 61 | struct fdtdec_phandle_args args; |
| 62 | struct udevice *dev_clk; |
| 63 | struct clk_ops *ops; |
| 64 | |
| 65 | debug("%s(dev=%p, index=%d, clk=%p)\n", __func__, dev, index, clk); |
| 66 | |
| 67 | assert(clk); |
Simon Glass | e160f7d | 2017-01-17 16:52:55 -0700 | [diff] [blame] | 68 | ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev), |
Simon Glass | e70cc43 | 2016-01-20 19:43:02 -0700 | [diff] [blame] | 69 | "clocks", "#clock-cells", 0, index, |
| 70 | &args); |
| 71 | if (ret) { |
| 72 | debug("%s: fdtdec_parse_phandle_with_args failed: err=%d\n", |
| 73 | __func__, ret); |
| 74 | return ret; |
| 75 | } |
| 76 | |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 77 | ret = uclass_get_device_by_of_offset(UCLASS_CLK, args.node, &dev_clk); |
Simon Glass | e70cc43 | 2016-01-20 19:43:02 -0700 | [diff] [blame] | 78 | if (ret) { |
| 79 | debug("%s: uclass_get_device_by_of_offset failed: err=%d\n", |
| 80 | __func__, ret); |
| 81 | return ret; |
| 82 | } |
Wenyou Yang | 3f56b13 | 2016-09-27 11:00:28 +0800 | [diff] [blame] | 83 | |
| 84 | clk->dev = dev_clk; |
| 85 | |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 86 | ops = clk_dev_ops(dev_clk); |
| 87 | |
| 88 | if (ops->of_xlate) |
| 89 | ret = ops->of_xlate(clk, &args); |
| 90 | else |
| 91 | ret = clk_of_xlate_default(clk, &args); |
| 92 | if (ret) { |
| 93 | debug("of_xlate() failed: %d\n", ret); |
| 94 | return ret; |
| 95 | } |
| 96 | |
| 97 | return clk_request(dev_clk, clk); |
| 98 | } |
Michal Simek | 9e0758b | 2016-07-14 13:11:37 +0200 | [diff] [blame] | 99 | # endif /* OF_PLATDATA */ |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 100 | |
| 101 | int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk) |
| 102 | { |
| 103 | int index; |
| 104 | |
| 105 | debug("%s(dev=%p, name=%s, clk=%p)\n", __func__, dev, name, clk); |
| 106 | |
Simon Glass | e160f7d | 2017-01-17 16:52:55 -0700 | [diff] [blame] | 107 | index = fdt_stringlist_search(gd->fdt_blob, dev_of_offset(dev), |
Simon Glass | b02e404 | 2016-10-02 17:59:28 -0600 | [diff] [blame] | 108 | "clock-names", name); |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 109 | if (index < 0) { |
Simon Glass | b02e404 | 2016-10-02 17:59:28 -0600 | [diff] [blame] | 110 | debug("fdt_stringlist_search() failed: %d\n", index); |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 111 | return index; |
| 112 | } |
| 113 | |
| 114 | return clk_get_by_index(dev, index, clk); |
Simon Glass | e70cc43 | 2016-01-20 19:43:02 -0700 | [diff] [blame] | 115 | } |
Simon Glass | 7423daa | 2016-07-04 11:58:03 -0600 | [diff] [blame] | 116 | #endif /* OF_CONTROL */ |
Stephen Warren | 135aa95 | 2016-06-17 09:44:00 -0600 | [diff] [blame] | 117 | |
| 118 | int clk_request(struct udevice *dev, struct clk *clk) |
| 119 | { |
| 120 | struct clk_ops *ops = clk_dev_ops(dev); |
| 121 | |
| 122 | debug("%s(dev=%p, clk=%p)\n", __func__, dev, clk); |
| 123 | |
| 124 | clk->dev = dev; |
| 125 | |
| 126 | if (!ops->request) |
| 127 | return 0; |
| 128 | |
| 129 | return ops->request(clk); |
| 130 | } |
| 131 | |
| 132 | int clk_free(struct clk *clk) |
| 133 | { |
| 134 | struct clk_ops *ops = clk_dev_ops(clk->dev); |
| 135 | |
| 136 | debug("%s(clk=%p)\n", __func__, clk); |
| 137 | |
| 138 | if (!ops->free) |
| 139 | return 0; |
| 140 | |
| 141 | return ops->free(clk); |
| 142 | } |
| 143 | |
| 144 | ulong clk_get_rate(struct clk *clk) |
| 145 | { |
| 146 | struct clk_ops *ops = clk_dev_ops(clk->dev); |
| 147 | |
| 148 | debug("%s(clk=%p)\n", __func__, clk); |
| 149 | |
| 150 | if (!ops->get_rate) |
| 151 | return -ENOSYS; |
| 152 | |
| 153 | return ops->get_rate(clk); |
| 154 | } |
| 155 | |
| 156 | ulong clk_set_rate(struct clk *clk, ulong rate) |
| 157 | { |
| 158 | struct clk_ops *ops = clk_dev_ops(clk->dev); |
| 159 | |
| 160 | debug("%s(clk=%p, rate=%lu)\n", __func__, clk, rate); |
| 161 | |
| 162 | if (!ops->set_rate) |
| 163 | return -ENOSYS; |
| 164 | |
| 165 | return ops->set_rate(clk, rate); |
| 166 | } |
| 167 | |
| 168 | int clk_enable(struct clk *clk) |
| 169 | { |
| 170 | struct clk_ops *ops = clk_dev_ops(clk->dev); |
| 171 | |
| 172 | debug("%s(clk=%p)\n", __func__, clk); |
| 173 | |
| 174 | if (!ops->enable) |
| 175 | return -ENOSYS; |
| 176 | |
| 177 | return ops->enable(clk); |
| 178 | } |
| 179 | |
| 180 | int clk_disable(struct clk *clk) |
| 181 | { |
| 182 | struct clk_ops *ops = clk_dev_ops(clk->dev); |
| 183 | |
| 184 | debug("%s(clk=%p)\n", __func__, clk); |
| 185 | |
| 186 | if (!ops->disable) |
| 187 | return -ENOSYS; |
| 188 | |
| 189 | return ops->disable(clk); |
| 190 | } |
Simon Glass | e70cc43 | 2016-01-20 19:43:02 -0700 | [diff] [blame] | 191 | |
Simon Glass | f26c8a8 | 2015-06-23 15:39:15 -0600 | [diff] [blame] | 192 | UCLASS_DRIVER(clk) = { |
| 193 | .id = UCLASS_CLK, |
| 194 | .name = "clk", |
| 195 | }; |