diff options
author | Hanjun Guo <hanjun.guo@linaro.org> | 2014-01-17 20:25:09 +0800 |
---|---|---|
committer | Graeme Gregory <graeme.gregory@linaro.org> | 2014-01-23 16:10:09 +0000 |
commit | 6b24e10c1db6c305f3262dfedf71d308f439593a (patch) | |
tree | e7122d1ffa5f502a0ad431848649c5f264d37d82 /drivers | |
parent | 63020e22bb7a2f9f76b835bf8720580bbe1dfd61 (diff) |
ACPI / ARM64: Update acpi_register_gsi to register with the core IRQ subsystem
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>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/acpi/plat/arm-core.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/drivers/acpi/plat/arm-core.c b/drivers/acpi/plat/arm-core.c index 2ff00b0888f8..22c823548372 100644 --- a/drivers/acpi/plat/arm-core.c +++ b/drivers/acpi/plat/arm-core.c @@ -84,7 +84,7 @@ 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; } @@ -350,7 +350,51 @@ EXPORT_SYMBOL(acpi_unregister_ioapic); */ 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, GSI should be unique so 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; + + /* + * Since only one GIC is supported in ACPI 5.0, we can + * create mapping refer to the default domain + */ + irq = irq_create_mapping(NULL, gsi); + if (!irq) + return irq; + + /* Set irq type if specified and different than the current one */ + if (irq_type != IRQ_TYPE_NONE && + irq_type != irq_get_trigger_type(irq)) + irq_set_irq_type(irq, irq_type); + return irq; } EXPORT_SYMBOL_GPL(acpi_register_gsi); |