This API is similar to DT based irq_of_parse_and_map but does link parent/child IRQ controllers. This is tested for primary GIC PPI and GIC SPI interrupts and not for secondary child irq controllers.
Signed-off-by: Amit Daniel Kachhap amit.daniel@samsung.com Signed-off-by: Hanjun Guo hanjun.guo@linaro.org --- drivers/acpi/plat/arm-core.c | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/plat/arm-core.c b/drivers/acpi/plat/arm-core.c index 9cc0208..17c99e1 100644 --- a/drivers/acpi/plat/arm-core.c +++ b/drivers/acpi/plat/arm-core.c @@ -90,7 +90,7 @@ enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_GIC;
static unsigned int gsi_to_irq(unsigned int gsi) { - int irq = irq_create_mapping(NULL, gsi); + int irq = irq_find_mapping(NULL, gsi);
return irq; } @@ -407,7 +407,39 @@ EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); */ int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) { - return -1; + unsigned int irq; + unsigned int irq_type; + + /* + * ACPI have no bindings to indicate SPI or PPI, so we + * use different mappings from DT in ACPI. + * + * For FDT + * PPI interrupt: in the range [0, 15]; + * SPI interrupt: in the range [0, 987]; + * + * For ACPI, using identity mapping for hwirq: + * PPI interrupt: in the range [16, 31]; + * SPI interrupt: in the range [32, 1019]; + */ + + if (trigger == ACPI_EDGE_SENSITIVE && + polarity == ACPI_ACTIVE_LOW) + irq_type = IRQ_TYPE_EDGE_FALLING; + else if (trigger == ACPI_EDGE_SENSITIVE && + polarity == ACPI_ACTIVE_HIGH) + irq_type = IRQ_TYPE_EDGE_RISING; + else if (trigger == ACPI_LEVEL_SENSITIVE && + polarity == ACPI_ACTIVE_LOW) + irq_type = IRQ_TYPE_LEVEL_LOW; + else if (trigger == ACPI_LEVEL_SENSITIVE && + polarity == ACPI_ACTIVE_HIGH) + irq_type = IRQ_TYPE_LEVEL_HIGH; + else + irq_type = IRQ_TYPE_NONE; + + irq = irq_create_acpi_mapping(gsi, irq_type); + return irq; } EXPORT_SYMBOL_GPL(acpi_register_gsi);