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| author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2024-01-10 01:14:50 +0000 |
|---|---|---|
| committer | Geert Uytterhoeven <geert+renesas@glider.be> | 2024-01-23 09:38:30 +0100 |
| commit | 28c5d4e40752fc39507a647b20649c5ca1cf33b7 (patch) | |
| tree | 89baf1d060e94cff251b801e7c8a3c9c85a1f49e | |
| parent | 8918283af1bd68f46f75164289492988dbc67a41 (diff) | |
| download | linux-stable-28c5d4e40752fc39507a647b20649c5ca1cf33b7.tar.gz linux-stable-28c5d4e40752fc39507a647b20649c5ca1cf33b7.tar.bz2 linux-stable-28c5d4e40752fc39507a647b20649c5ca1cf33b7.zip | |
of: Add for_each_reserved_child_of_node()
We would like to use for_each loop for status = "reserved" nodes.
Add for_each_reserved_child_of_node() for it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/87a5pegfau.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
| -rw-r--r-- | drivers/of/base.c | 29 | ||||
| -rw-r--r-- | include/linux/of.h | 11 |
2 files changed, 40 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index ae26a15390f7..49a9ad8134db 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -466,6 +466,20 @@ static bool __of_device_is_available(const struct device_node *device) } /** + * __of_device_is_reserved - check if a device is reserved + * + * @device: Node to check for availability, with locks already held + * + * Return: True if the status property is set to "reserved", false otherwise + */ +static bool __of_device_is_reserved(const struct device_node *device) +{ + static const char * const reserved[] = {"reserved", NULL}; + + return __of_device_is_status(device, reserved); +} + +/** * of_device_is_available - check if a device is available for use * * @device: Node to check for availability @@ -651,6 +665,21 @@ struct device_node *of_get_next_available_child(const struct device_node *node, EXPORT_SYMBOL(of_get_next_available_child); /** + * of_get_next_reserved_child - Find the next reserved child node + * @node: parent node + * @prev: previous child of the parent node, or NULL to get first + * + * This function is like of_get_next_child(), except that it + * automatically skips any disabled nodes (i.e. status = "disabled"). + */ +struct device_node *of_get_next_reserved_child(const struct device_node *node, + struct device_node *prev) +{ + return of_get_next_status_child(node, prev, __of_device_is_reserved); +} +EXPORT_SYMBOL(of_get_next_reserved_child); + +/** * of_get_next_cpu_node - Iterate on cpu nodes * @prev: previous child of the /cpus node, or NULL to get first * diff --git a/include/linux/of.h b/include/linux/of.h index 6a9ddf20e79a..331e05918f11 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -294,6 +294,8 @@ extern struct device_node *of_get_next_child(const struct device_node *node, struct device_node *prev); extern struct device_node *of_get_next_available_child( const struct device_node *node, struct device_node *prev); +extern struct device_node *of_get_next_reserved_child( + const struct device_node *node, struct device_node *prev); extern struct device_node *of_get_compatible_child(const struct device_node *parent, const char *compatible); @@ -541,6 +543,12 @@ static inline struct device_node *of_get_next_available_child( return NULL; } +static inline struct device_node *of_get_next_reserved_child( + const struct device_node *node, struct device_node *prev) +{ + return NULL; +} + static inline struct device_node *of_find_node_with_property( struct device_node *from, const char *prop_name) { @@ -1431,6 +1439,9 @@ static inline int of_property_read_s32(const struct device_node *np, #define for_each_available_child_of_node(parent, child) \ for (child = of_get_next_available_child(parent, NULL); child != NULL; \ child = of_get_next_available_child(parent, child)) +#define for_each_reserved_child_of_node(parent, child) \ + for (child = of_get_next_reserved_child(parent, NULL); child != NULL; \ + child = of_get_next_reserved_child(parent, child)) #define for_each_of_cpu_node(cpu) \ for (cpu = of_get_next_cpu_node(NULL); cpu != NULL; \ |