443580486e
This patch adds a driver for external IRQ pins connected to the INTC block on recent SoCs from Renesas. The INTC hardware block usually contains a rather wide range of features ranging from external IRQ pin handling to legacy interrupt controller support. On older SoCs the INTC is used as a general purpose interrupt controller both for external IRQ pins and on-chip devices. On more recent ARM based SoCs with Cortex-A9 the main interrupt controller is the GIC, but IRQ trigger setup still need to happen in the INTC hardware block. This driver implements the glue code needed to configure IRQ trigger and also handle mask/unmask and demux of external IRQ pins hooked up from the INTC to the GIC. Tested on sh73a0 and r8a7779. The hardware varies quite a bit with SoC model, for instance register width and bitfield widths vary wildly. The driver requires one GIC SPI per external IRQ pin to operate. Each driver instance will handle up to 8 external IRQ pins. The SoCs using this driver are currently mainly used together with regular platform devices so this driver allows configuration via platform data to support things like static interrupt base address. DT support will be added incrementally in the not so distant future. Signed-off-by: Magnus Damm <damm@opensource.se> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
40 lines
604 B
Plaintext
40 lines
604 B
Plaintext
config IRQCHIP
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def_bool y
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depends on OF_IRQ
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config ARM_GIC
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bool
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select IRQ_DOMAIN
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select MULTI_IRQ_HANDLER
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config GIC_NON_BANKED
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bool
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config ARM_VIC
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bool
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select IRQ_DOMAIN
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select MULTI_IRQ_HANDLER
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config ARM_VIC_NR
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int
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default 4 if ARCH_S5PV210
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default 3 if ARCH_S5PC100
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default 2
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depends on ARM_VIC
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help
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The maximum number of VICs available in the system, for
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power management.
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config RENESAS_INTC_IRQPIN
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bool
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select IRQ_DOMAIN
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config VERSATILE_FPGA_IRQ
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bool
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select IRQ_DOMAIN
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config VERSATILE_FPGA_IRQ_NR
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int
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default 4
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depends on VERSATILE_FPGA_IRQ
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