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drivers: misc: irq-uclass: Update irq_get_by_index

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Support reading the "interrupts" property from the devicetree in case
the "interrupts-extended" property isn't found. As the "interrupts"
property is commonly used, this allows to parse all existing FDT and
makes irq_get_by_index() more useful.

The "interrupts" property doesn't contain a phandle as "interrupts-extended"
does, so implement a new method to locate the interrupt-parent called
irq_get_interrupt_parent().

TEST: Read the interrupts from the GIC node for ACPI MADT generation.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Moritz Fischer <moritzf@google.com>
This commit is contained in:
Patrick Rudolph
2024-10-23 15:20:05 +02:00
committed by Tom Rini
parent df8d759d9d
commit f116feadea
4 changed files with 97 additions and 1 deletions
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14
include/irq.h
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@@ -200,6 +200,20 @@ int irq_restore_polarities(struct udevice *dev);
*/
int irq_read_and_clear(struct irq *irq);
/**
* irq_get_interrupt_parent() - returns the interrupt parent
*
* Walks the devicetree and returns the interrupt parent's ofnode
* for the specified device.
*
* @dev: device
* @interrupt_parent: The interrupt parent's ofnode'
* Return: 0 success, or error value
*
*/
int irq_get_interrupt_parent(const struct udevice *dev,
struct udevice **interrupt_parent);
struct phandle_2_arg;
/**
* irq_get_by_phandle() - Get an irq by its phandle information (of-platadata)