On Mon, Sep 12, 2022 at 05:54:36PM +0200, Ahmad Fatoum wrote:
> Like of_append_property for adding at the end of properties, implement
> of_prepend_property for placing data into the front.
>
> This is especially useful to fixup most-specific compatibles into
> existing nodes.
>
> Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
> ---
> v1 -> v2:
> - simplify with malloc/memcpy instead of realloc/memmove (Sascha)
> ---
> drivers/of/base.c | 30 ++++++++++++++++++++++++++++++
> include/of.h | 8 ++++++++
> test/self/of_manipulation.c | 2 +-
> 3 files changed, 39 insertions(+), 1 deletion(-)
Applied, thanks
Sascha
>
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index 212b226eb55c..ea2a88764bb2 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -2378,6 +2378,36 @@ int of_append_property(struct device_node *np, const char *name, const void *val
> return 0;
> }
>
> +int of_prepend_property(struct device_node *np, const char *name, const void *val, int len)
> +{
> + struct property *pp;
> + const void *oldval;
> + void *buf;
> + int oldlen;
> +
> + pp = of_find_property(np, name, &oldlen);
> + if (!pp) {
> + of_new_property(np, name, val, len);
> + return 0;
> + }
> +
> + oldval = of_property_get_value(pp);
> +
> + buf = malloc(len + oldlen);
> + if (!buf)
> + return -ENOMEM;
> +
> + memcpy(buf, val, len);
> + memcpy(buf + len, oldval, oldlen);
> +
> + free(pp->value);
> + pp->value = buf;
> + pp->length = len + oldlen;
> + pp->value_const = NULL;
> +
> + return 0;
> +}
> +
> int of_property_sprintf(struct device_node *np,
> const char *propname, const char *fmt, ...)
> {
> diff --git a/include/of.h b/include/of.h
> index 153e75d3e51d..052d5fcad84c 100644
> --- a/include/of.h
> +++ b/include/of.h
> @@ -135,6 +135,8 @@ extern int of_set_property(struct device_node *node, const char *p,
> const void *val, int len, int create);
> extern int of_append_property(struct device_node *np, const char *p,
> const void *val, int len);
> +extern int of_prepend_property(struct device_node *np, const char *name,
> + const void *val, int len);
> extern struct property *of_new_property(struct device_node *node,
> const char *name, const void *data, int len);
> extern struct property *of_new_property_const(struct device_node *node,
> @@ -536,6 +538,12 @@ static inline int of_append_property(struct device_node *np, const char *p,
> return -ENOSYS;
> }
>
> +static inline int of_prepend_property(struct device_node *np, const char *name,
> + const void *val, int len)
> +{
> + return -ENOSYS;
> +}
> +
> static inline struct property *of_new_property(struct device_node *node,
> const char *name, const void *data, int len)
> {
> diff --git a/test/self/of_manipulation.c b/test/self/of_manipulation.c
> index 7e30a60ca687..f7f95fa269af 100644
> --- a/test/self/of_manipulation.c
> +++ b/test/self/of_manipulation.c
> @@ -103,9 +103,9 @@ static void test_of_property_strings(struct device_node *root)
>
> of_append_property(np4, "property-single", "ayy", 4);
>
> - of_append_property(np4, "property-multi", "ayy", 4);
> of_append_property(np4, "property-multi", "bee", 4);
> of_append_property(np4, "property-multi", "sea", 4);
> + of_prepend_property(np4, "property-multi", "ayy", 4);
>
> assert_equal(np3, np4);
> }
> --
> 2.30.2
>
>
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
