diff options
| author | Akhil R <akhilrajeev@nvidia.com> | 2022-01-28 17:14:25 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-17 15:11:43 +0200 |
| commit | c15e2ab4fed9a9dc6c90b20d50352b72fa093345 (patch) | |
| tree | 333d2f3c40be46960910c83db7d3bb6068070a75 /drivers/base | |
| parent | bf36521e559e28928c7f860d8d2db97afb5dbc93 (diff) | |
device property: Add fwnode_irq_get_byname
[ Upstream commit ca0acb511c21738b32386ce0f85c284b351d919e ]
Add fwnode_irq_get_byname() to get an interrupt by name from either
ACPI table or Device Tree, whichever is used for enumeration.
In the ACPI case, this allow us to use 'interrupt-names' in
_DSD which can be mapped to Interrupt() resource by index.
The implementation is similar to 'interrupt-names' in the
Device Tree.
Signed-off-by: Akhil R <akhilrajeev@nvidia.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Stable-dep-of: 8d3cefaf6592 ("i2c: core: Lock address during client device instantiation")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/property.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index 87bb97e12749..ff1be3e311ee 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1067,6 +1067,35 @@ void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index) EXPORT_SYMBOL(fwnode_iomap); /** + * fwnode_irq_get_byname - Get IRQ from a fwnode using its name + * @fwnode: Pointer to the firmware node + * @name: IRQ name + * + * Description: + * Find a match to the string @name in the 'interrupt-names' string array + * in _DSD for ACPI, or of_node for Device Tree. Then get the Linux IRQ + * number of the IRQ resource corresponding to the index of the matched + * string. + * + * Return: + * Linux IRQ number on success, or negative errno otherwise. + */ +int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name) +{ + int index; + + if (!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); + +/** * 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 |