[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 4/9] xen: arm: add two new device tree helpers
- dt_property_read_u64 - dt_find_node_by_type Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> Acked-by: Julien Grall <julien.grall@xxxxxxxxxx> --- v2: fix some typos rebase and update for change to some underlying functions (added dt_ prefix) --- xen/common/device_tree.c | 29 +++++++++++++++++++++++++++++ xen/include/xen/device_tree.h | 17 +++++++++++++++++ 2 files changed, 46 insertions(+) diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c index 0ece249..366e2fe 100644 --- a/xen/common/device_tree.c +++ b/xen/common/device_tree.c @@ -541,6 +541,21 @@ bool_t dt_property_read_u32(const struct dt_device_node *np, return 1; } + +bool_t dt_property_read_u64(const struct dt_device_node *np, + const char *name, u64 *out_value) +{ + u32 len; + const __be32 *val; + + val = dt_get_property(np, name, &len); + if ( !val || len < sizeof(*out_value) ) + return 0; + + *out_value = dt_read_number(val, 2); + + return 1; +} int dt_property_read_string(const struct dt_device_node *np, const char *propname, const char **out_string) { @@ -606,6 +621,20 @@ struct dt_device_node *dt_find_node_by_name(struct dt_device_node *from, return np; } +struct dt_device_node *dt_find_node_by_type(struct dt_device_node *from, + const char *type) +{ + struct dt_device_node *np; + struct dt_device_node *dt; + + dt = from ? from->allnext : dt_host; + dt_for_each_device_node(dt, np) + if ( np->type && (dt_node_cmp(np->type, type) == 0) ) + break; + + return np; +} + struct dt_device_node *dt_find_node_by_path(const char *path) { struct dt_device_node *np; diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h index 7810f53..c126656 100644 --- a/xen/include/xen/device_tree.h +++ b/xen/include/xen/device_tree.h @@ -351,6 +351,17 @@ const void *dt_get_property(const struct dt_device_node *np, bool_t dt_property_read_u32(const struct dt_device_node *np, const char *name, u32 *out_value); /** + * dt_property_read_u64 - Helper to read a u64 property. + * @np: node to get the value + * @name: name of the property + * @out_value: pointer to return value + * + * Return true if get the desired value. + */ +bool_t dt_property_read_u64(const struct dt_device_node *np, + const char *name, u64 *out_value); + +/** * dt_property_read_string - Find and read a string from a property * @np: Device node from which the property value is to be read * @propname: Name of the property to be searched @@ -399,6 +410,12 @@ struct dt_device_node *dt_find_node_by_name(struct dt_device_node *node, const char *name); /** + * dt_find_node_by_type - Find a node by its "type" property + */ +struct dt_device_node *dt_find_node_by_type(struct dt_device_node *from, + const char *type); + +/** * df_find_node_by_alias - Find a node matching an alias * @alias: The alias to match * -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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