linux-imx
Public
Source
committed c6c93048baf31
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* found.32
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*/33
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static struct of_dma *of_dma_find_controller(struct of_phandle_args *dma_spec)34
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{35
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struct of_dma *ofdma;36
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list_for_each_entry(ofdma, &of_dma_list, of_dma_controllers)38
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if (ofdma->of_node == dma_spec->np)39
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return ofdma;40
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pr_debug("%s: can't find DMA controller %s\n", __func__,42
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dma_spec->np->full_name);41
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pr_debug("%s: can't find DMA controller %pOF\n", __func__,42
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dma_spec->np);43
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return NULL;45
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}46
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/**48
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* of_dma_router_xlate - translation function for router devices49
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* @dma_spec: pointer to DMA specifier as found in the device tree50
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* @of_dma: pointer to DMA controller data (router information)51
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*52
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* The function creates new dma_spec to be passed to the router driver's248
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pr_err("%s: not enough information provided\n", __func__);249
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return ERR_PTR(-ENODEV);250
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}251
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/* Silently fail if there is not even the "dmas" property */253
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if (!of_find_property(np, "dmas", NULL))254
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return ERR_PTR(-ENODEV);255
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count = of_property_count_strings(np, "dma-names");257
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if (count < 0) {258
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pr_err("%s: dma-names property of node '%s' missing or empty\n",259
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__func__, np->full_name);258
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pr_err("%s: dma-names property of node '%pOF' missing or empty\n",259
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__func__, np);260
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return ERR_PTR(-ENODEV);261
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}262
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/*264
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* approximate an average distribution across multiple265
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* entries with the same name266
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*/267
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start = atomic_inc_return(&last_index);268
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for (i = 0; i < count; i++) {269
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if (of_dma_match_channel(np, name,