irqchip: Add driver for Loongson-3 HyperTransport PIC controller

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This controller appeared on Loongson-3 family of chips to receive
interrupts from PCH PIC.
It is a I8259 with optimized interrupt polling flow. We can poll
interrupt number from HT vector directly but still have to follow
standard I8259 routines to mask, unmask and EOI.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Co-developed-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

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Jiaxun Yang 2020-03-25 11:54:57 +08:00 • committed by Thomas Bogendoerfer

parent b6280c8bb6

commit a93f1d903f

4 changed files with 161 additions and 0 deletions

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1

arch/mips/include/asm/i8259.h

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10

drivers/irqchip/Kconfig

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1

drivers/irqchip/Makefile

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149

drivers/irqchip/irq-loongson-htpic.c

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