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author | Miquel Raynal <miquel.raynal@bootlin.com> | 2023-04-04 18:21:17 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-04-05 19:41:10 +0200 |
commit | bd7a7ed774afd1a4174df34227626c95573be517 (patch) | |
tree | 0181656673eb402684fcc087b0f190025388188e /drivers/of/module.c | |
parent | 673aa1ed1c9b6710bf24e3f0957d85e2f46c77db (diff) | |
download | linux-stable-bd7a7ed774afd1a4174df34227626c95573be517.tar.gz linux-stable-bd7a7ed774afd1a4174df34227626c95573be517.tar.bz2 linux-stable-bd7a7ed774afd1a4174df34227626c95573be517.zip |
of: Move of_modalias() to module.c
Create a specific .c file for OF related module handling.
Move of_modalias() inside as a first step.
The helper is exposed through of.h even though it is only used by core
files because the users from device.c will soon be split into an OF-only
helper in module.c as well as a device-oriented inline helper in
of_device.h. Putting this helper in of_private.h would require to
include of_private.h from of_device.h, which is not acceptable.
Suggested-by: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230404172148.82422-10-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/of/module.c')
-rw-r--r-- | drivers/of/module.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/of/module.c b/drivers/of/module.c new file mode 100644 index 000000000000..4c59752bc8d6 --- /dev/null +++ b/drivers/of/module.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Linux kernel module helpers. + */ + +#include <linux/of.h> +#include <linux/slab.h> +#include <linux/string.h> + +ssize_t of_modalias(const struct device_node *np, char *str, ssize_t len) +{ + const char *compat; + char *c; + struct property *p; + ssize_t csize; + ssize_t tsize; + + /* Name & Type */ + /* %p eats all alphanum characters, so %c must be used here */ + csize = snprintf(str, len, "of:N%pOFn%c%s", np, 'T', + of_node_get_device_type(np)); + tsize = csize; + len -= csize; + if (str) + str += csize; + + of_property_for_each_string(np, "compatible", p, compat) { + csize = strlen(compat) + 1; + tsize += csize; + if (csize > len) + continue; + + csize = snprintf(str, len, "C%s", compat); + for (c = str; c; ) { + c = strchr(c, ' '); + if (c) + *c++ = '_'; + } + len -= csize; + str += csize; + } + + return tsize; +} |