45 lines
854 B
C
45 lines
854 B
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Linux kernel module helpers.
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*/
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#include <linux/of.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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ssize_t of_modalias(const struct device_node *np, char *str, ssize_t len)
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{
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const char *compat;
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char *c;
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struct property *p;
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ssize_t csize;
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ssize_t tsize;
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/* Name & Type */
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/* %p eats all alphanum characters, so %c must be used here */
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csize = snprintf(str, len, "of:N%pOFn%c%s", np, 'T',
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of_node_get_device_type(np));
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tsize = csize;
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len -= csize;
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if (str)
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str += csize;
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of_property_for_each_string(np, "compatible", p, compat) {
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csize = strlen(compat) + 1;
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tsize += csize;
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if (csize > len)
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continue;
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csize = snprintf(str, len, "C%s", compat);
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for (c = str; c; ) {
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c = strchr(c, ' ');
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if (c)
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*c++ = '_';
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}
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len -= csize;
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str += csize;
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}
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return tsize;
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}
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