Messages in this thread Patch in this message | | | From | Akhil R <> | Subject | [PATCH v2 1/3] device property: Add device_irq_get_byname | Date | Wed, 12 Jan 2022 19:44:20 +0530 |
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Get interrupt by name from ACPI table as well.
Add option to use 'interrupt-names' in _DSD which can map to interrupt by index. The implementation is similar to 'interrupt-names' in devicetree. Also add a common routine to get irq by name from devicetree and ACPI table.
Signed-off-by: Akhil R <akhilrajeev@nvidia.com> --- drivers/base/property.c | 35 +++++++++++++++++++++++++++++++++++ include/linux/property.h | 3 +++ 2 files changed, 38 insertions(+)
diff --git a/drivers/base/property.c b/drivers/base/property.c index cbe4fa2..414c316 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -920,6 +920,41 @@ int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index) EXPORT_SYMBOL(fwnode_irq_get); /** + * fwnode_irq_get_byname - Get IRQ from a fwnode using its name + * @fwnode: Pointer to the firmware node + * @name: IRQ name in interrupt-names property in fwnode + * + * Returns Linux IRQ number on success, errno otherwise. + */ +int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name) +{ + int index; + + if (unlikely(!name)) + return -EINVAL; + + index = fwnode_property_match_string(fwnode, "interrupt-names", name); + if (index < 0) + return index; + + return fwnode_irq_get(fwnode, index); +} +EXPORT_SYMBOL(fwnode_irq_get_byname); + +/** + * device_irq_get_byname - Get IRQ of a device using interrupt name + * @dev: Device to get the interrupt + * @name: IRQ name in interrupt-names property in fwnode + * + * Returns Linux IRQ number on success, errno otherwise. + */ +int device_irq_get_byname(struct device *dev, const char *name) +{ + return fwnode_irq_get_byname(dev_fwnode(dev), name); +} +EXPORT_SYMBOL_GPL(device_irq_get_byname); + +/** * fwnode_graph_get_next_endpoint - Get next endpoint firmware node * @fwnode: Pointer to the parent firmware node * @prev: Previous endpoint node or %NULL to get the first diff --git a/include/linux/property.h b/include/linux/property.h index 16f736c..bc49350 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -121,6 +121,9 @@ struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode); void fwnode_handle_put(struct fwnode_handle *fwnode); int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index); +int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name); + +int device_irq_get_byname(struct device *dev, const char *name); unsigned int device_get_child_node_count(struct device *dev); -- 2.7.4
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