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dm: core: Set device tree node for root device
The root device corresponds to the root device tree node, so set this up. Also add a few notes to the documentation. Signed-off-by: Simon Glass <sjg@chromium.org>
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@ -363,6 +363,10 @@ can leave out platdata_auto_alloc_size. In this case you can use malloc
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in your ofdata_to_platdata (or probe) method to allocate the required memory,
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in your ofdata_to_platdata (or probe) method to allocate the required memory,
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and you should free it in the remove method.
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and you should free it in the remove method.
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The driver model tree is intended to mirror that of the device tree. The
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root driver is at device tree offset 0 (the root node, '/'), and its
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children are the children of the root node.
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Declaring Uclasses
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Declaring Uclasses
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------------------
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------------------
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@ -49,6 +49,9 @@ int dm_init(void)
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ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST);
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ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST);
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if (ret)
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if (ret)
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return ret;
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return ret;
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#ifdef CONFIG_OF_CONTROL
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DM_ROOT_NON_CONST->of_offset = 0;
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#endif
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ret = device_probe(DM_ROOT_NON_CONST);
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ret = device_probe(DM_ROOT_NON_CONST);
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if (ret)
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if (ret)
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return ret;
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return ret;
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