| Message ID | 1642851166-27096-2-git-send-email-akhilrajeev@nvidia.com |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | Enable named interrupt smbus-alert for ACPI | expand |
On Sat, Jan 22, 2022 at 12:33 PM Akhil R <akhilrajeev@nvidia.com> wrote: > > 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> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > --- > drivers/base/property.c | 29 +++++++++++++++++++++++++++++ > include/linux/property.h | 1 + > 2 files changed, 30 insertions(+) > > diff --git a/drivers/base/property.c b/drivers/base/property.c > index e6497f6..fc59e0f 100644 > --- a/drivers/base/property.c > +++ b/drivers/base/property.c > @@ -936,6 +936,35 @@ 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 > diff --git a/include/linux/property.h b/include/linux/property.h > index 7399a0b..95d56a5 100644 > --- a/include/linux/property.h > +++ b/include/linux/property.h > @@ -121,6 +121,7 @@ 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); > > void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index); > > -- > 2.7.4 >
diff --git a/drivers/base/property.c b/drivers/base/property.c index e6497f6..fc59e0f 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -936,6 +936,35 @@ 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 diff --git a/include/linux/property.h b/include/linux/property.h index 7399a0b..95d56a5 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -121,6 +121,7 @@ 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); void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index);
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> --- drivers/base/property.c | 29 +++++++++++++++++++++++++++++ include/linux/property.h | 1 + 2 files changed, 30 insertions(+)