From: Peng Fan <peng.fan@xxxxxxx> Preparing for assigned-clock-rates-u64 support, add function of_property_for_each_u64 to iterate each u64 value Signed-off-by: Peng Fan <peng.fan@xxxxxxx> --- drivers/of/property.c | 23 +++++++++++++++++++++++ include/linux/of.h | 24 ++++++++++++++++++++++++ 2 files changed, 47 insertions(+) diff --git a/drivers/of/property.c b/drivers/of/property.c index 164d77cb9445..b89c3ab01d44 100644 --- a/drivers/of/property.c +++ b/drivers/of/property.c @@ -548,6 +548,29 @@ const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur, } EXPORT_SYMBOL_GPL(of_prop_next_u32); +const __be32 *of_prop_next_u64(struct property *prop, const __be32 *cur, + u64 *pu) +{ + const void *curv = cur; + + if (!prop) + return NULL; + + if (!cur) { + curv = prop->value; + goto out_val; + } + + curv += sizeof(*cur) * 2; + if (curv >= prop->value + prop->length) + return NULL; + +out_val: + *pu = of_read_number(curv, 2); + return curv; +} +EXPORT_SYMBOL_GPL(of_prop_next_u64); + const char *of_prop_next_string(struct property *prop, const char *cur) { const void *curv = cur; diff --git a/include/linux/of.h b/include/linux/of.h index 13cf7a43b473..464eca6a4636 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -439,6 +439,18 @@ extern int of_detach_node(struct device_node *); */ const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur, u32 *pu); + +/* + * struct property *prop; + * const __be32 *p; + * u64 u; + * + * of_property_for_each_u64(np, "propname", prop, p, u) + * printk("U64 value: %llx\n", u); + */ +const __be32 *of_prop_next_u64(struct property *prop, const __be32 *cur, + u64 *pu); + /* * struct property *prop; * const char *s; @@ -834,6 +846,12 @@ static inline const __be32 *of_prop_next_u32(struct property *prop, return NULL; } +static inline const __be32 *of_prop_next_u64(struct property *prop, + const __be32 *cur, u64 *pu) +{ + return NULL; +} + static inline const char *of_prop_next_string(struct property *prop, const char *cur) { @@ -1437,6 +1455,12 @@ static inline int of_property_read_s32(const struct device_node *np, p; \ p = of_prop_next_u32(prop, p, &u)) +#define of_property_for_each_u64(np, propname, prop, p, u) \ + for (prop = of_find_property(np, propname, NULL), \ + p = of_prop_next_u64(prop, NULL, &u); \ + p; \ + p = of_prop_next_u64(prop, p, &u)) + #define of_property_for_each_string(np, propname, prop, s) \ for (prop = of_find_property(np, propname, NULL), \ s = of_prop_next_string(prop, NULL); \ -- 2.37.1