Add fwnode_device_is_available() to tell whether the device corresponding to a certain fwnode_handle is available for use. Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> --- drivers/acpi/property.c | 9 +++++++++ drivers/base/property.c | 10 ++++++++++ drivers/of/property.c | 6 ++++++ include/linux/fwnode.h | 1 + include/linux/property.h | 1 + 5 files changed, 27 insertions(+) diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index d26f24d..8df71bb 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -1121,6 +1121,14 @@ int acpi_graph_get_remote_endpoint(struct fwnode_handle *fwnode, return 0; } +static bool acpi_fwnode_device_is_available(struct fwnode_handle *fwnode) +{ + if (!is_acpi_device_node(fwnode)) + return false; + + return acpi_device_is_present(to_acpi_device_node(fwnode)); +} + static bool acpi_fwnode_property_present(struct fwnode_handle *fwnode, const char *propname) { @@ -1225,6 +1233,7 @@ static int acpi_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode, } const struct fwnode_operations acpi_fwnode_ops = { + .device_is_available = acpi_fwnode_device_is_available, .property_present = acpi_fwnode_property_present, .property_read_int_array = acpi_fwnode_property_read_int_array, .property_read_string_array = acpi_fwnode_property_read_string_array, diff --git a/drivers/base/property.c b/drivers/base/property.c index 6eccc4e..ad0de38 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1020,6 +1020,16 @@ void fwnode_handle_put(struct fwnode_handle *fwnode) EXPORT_SYMBOL_GPL(fwnode_handle_put); /** + * fwnode_device_is_available - check if a device is available for use + * @fwnode: Pointer to the fwnode of the device. + */ +bool fwnode_device_is_available(struct fwnode_handle *fwnode) +{ + return fwnode_call_int_op(fwnode, device_is_available); +} +EXPORT_SYMBOL_GPL(fwnode_device_is_available); + +/** * device_get_child_node_count - return the number of child nodes for device * @dev: Device to cound the child nodes for */ diff --git a/drivers/of/property.c b/drivers/of/property.c index bb6ac73..7042f62 100644 --- a/drivers/of/property.c +++ b/drivers/of/property.c @@ -791,6 +791,11 @@ static void of_fwnode_put(struct fwnode_handle *fwnode) of_node_put(to_of_node(fwnode)); } +static bool of_fwnode_device_is_available(struct fwnode_handle *fwnode) +{ + return of_device_is_available(to_of_node(fwnode)); +} + static bool of_fwnode_property_present(struct fwnode_handle *fwnode, const char *propname) { @@ -925,6 +930,7 @@ static int of_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode, const struct fwnode_operations of_fwnode_ops = { .get = of_fwnode_get, .put = of_fwnode_put, + .device_is_available = of_fwnode_device_is_available, .property_present = of_fwnode_property_present, .property_read_int_array = of_fwnode_property_read_int_array, .property_read_string_array = of_fwnode_property_read_string_array, diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 35f6626..4e60b2b 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -65,6 +65,7 @@ struct fwnode_endpoint { struct fwnode_operations { void (*get)(struct fwnode_handle *fwnode); void (*put)(struct fwnode_handle *fwnode); + bool (*device_is_available)(struct fwnode_handle *fwnode); bool (*property_present)(struct fwnode_handle *fwnode, const char *propname); int (*property_read_int_array)(struct fwnode_handle *fwnode, diff --git a/include/linux/property.h b/include/linux/property.h index 2f48261..7be014a 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -51,6 +51,7 @@ int device_property_read_string(struct device *dev, const char *propname, int device_property_match_string(struct device *dev, const char *propname, const char *string); +bool fwnode_device_is_available(struct fwnode_handle *fwnode); bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname); int fwnode_property_read_u8_array(struct fwnode_handle *fwnode, const char *propname, u8 *val, -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html