On Thu, Dec 16, 2021 at 3:14 PM Akhil R <akhilrajeev@xxxxxxxxxx> wrote:
>
> Get interrupt by name from ACPI table as well.
the interrupt resource
> 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@xxxxxxxxxx>
> ---
> 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..7acf4fc 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
> + * @index: IRQ name
> + *
Needs a description to explain how the name is described.
> + * 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;
This property ise needs to be described in the ACPI documentation:
https://www.kernel.org/doc/html/latest/firmware-guide/acpi/enumeration.html
Perhaps after the DMA section.
> + return fwnode_irq_get(fwnode, index);
> +}
--
With Best Regards,
Andy Shevchenko
