irqchip/qcom: Add IRQ combiner driver

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Driver for interrupt combiners in the Top-level Control and Status
Registers (TCSR) hardware block in Qualcomm Technologies chips.

An interrupt combiner in this block combines a set of interrupts by
OR'ing the individual interrupt signals into a summary interrupt
signal routed to a parent interrupt controller, and provides read-
only, 32-bit registers to query the status of individual interrupts.
The status bit for IRQ n is bit (n % 32) within register (n / 32)
of the given combiner. Thus, each combiner can be described as a set
of register offsets and the number of IRQs managed.

Signed-off-by: Agustin Vega-Frias <agustinv@codeaurora.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

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Agustin Vega-Frias 2017-02-02 18:23:59 -05:00 • committed by Marc Zyngier

parent d44fa3d460

commit f20cc9b00c

3 changed files with 306 additions and 0 deletions

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9

drivers/irqchip/Kconfig

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1

drivers/irqchip/Makefile

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296

drivers/irqchip/qcom-irq-combiner.c

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