Hi Ahmad,
On 22-08-09, Ahmad Fatoum wrote:
> board code fix up the device tree for OS consumption. Sometimes it's
> useful for the fixup to append onto an existing property.
> Add a helper that simplifies this.
do you have a particular use-case for this?
Regards,
Marco
> Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
> ---
> drivers/of/base.c | 36 ++++++++++++++++++++++++++++++++++++
> include/of.h | 8 ++++++++
> 2 files changed, 44 insertions(+)
>
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index 101b2f74c74f..0893bdf3e04f 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -2321,6 +2321,42 @@ int of_set_property(struct device_node *np, const char *name, const void *val, i
> return 0;
> }
>
> +int of_append_property(struct device_node *np, const char *name, const void *val, int len)
> +{
> + struct property *pp;
> + void *buf = NULL;
> + int orig_len = 0;
> +
> + if (!np)
> + return -ENOENT;
> +
> + pp = of_find_property(np, name, NULL);
> + if (pp) {
> + buf = pp->value;
> + orig_len = pp->length;
> + }
> +
> + buf = realloc(buf, orig_len + len);
> + if (!buf)
> + return -ENOMEM;
> +
> + memcpy(buf + orig_len, val, len);
> +
> + if (pp) {
> + pp->value = buf;
> + pp->length += len;
> +
> + if (pp->value_const) {
> + memcpy(buf, pp->value_const, orig_len);
> + pp->value_const = NULL;
> + }
> + } else {
> + pp = __of_new_property(np, name, buf, len);
> + }
> +
> + 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 c65cef5a5a7c..97b4b3dd79bd 100644
> --- a/include/of.h
> +++ b/include/of.h
> @@ -131,6 +131,8 @@ extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
>
> 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 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,
> @@ -515,6 +517,12 @@ static inline int of_set_property(struct device_node *node, const char *p,
> return -ENOSYS;
> }
>
> +static inline int of_append_property(struct device_node *np, const char *p,
> + 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)
> {
> --
> 2.30.2
>
>
>
