irqchip: Add NXP INTMUX interrupt multiplexer support
The Interrupt Multiplexer (INTMUX) expands the number of peripherals that can interrupt the core: * The INTMUX has 8 channels that are assigned to 8 NVIC interrupt slots. * Each INTMUX channel can receive up to 32 interrupt sources and has 1 interrupt output. * The INTMUX routes the interrupt sources to the interrupt outputs. Signed-off-by:Shengjiu Wang <shengjiu.wang@nxp.com> Signed-off-by:
Joakim Zhang <qiangqing.zhang@nxp.com> Signed-off-by:
Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200117060653.27485-3-qiangqing.zhang@nxp.com
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