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path: root/drivers/irqchip/irq-i8259.c
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2016-10-06irqchip: i8259: Remove unused i8259A_irq_pendingPaul Burton
The i8259A_irq_pending function is unused. Remove the dead code. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14271/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06irqchip: i8259: Allow platforms to override poll functionPaul Burton
The default i8259 polling function (i8259_irq) is nicely generic but is fairly costly. Platforms often provide an alternative means of polling for an i8259 interrupt, and when using the i8259 without device tree have typically just chained its parent interrupt to their own handler function. In order to allow for platform-specific polling functions to be used in cases where the driver is probed via device tree, provide an i8259_set_poll function that accepts a pointer to an alternative poll function that will override the default. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14270/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06irqchip: i8259: Add domain before mapping parent irqPaul Burton
Mapping the parent IRQ will use a virq number which may conflict with the hardcoded I8259A_IRQ_BASE..I8259A_IRQ_BASE+15 range that the i8259 driver expects to be free. If this occurs then we'll hit errors when adding the i8259 IRQ domain, since one of its virq numbers will already be in use. Avoid this by adding the i8259 domain before mapping the parent IRQ, such that the i8259 virq numbers become used before the parent interrupt controller gets a chance to use any of them. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14269/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-10-01irqchip/i8259: Convert to use irq_set_chained_handler_and_dataAxel Lin
Chained irq handlers usually set up handler data as well. We now have a function to set both under irq_desc->lock. Replace the two calls with one. Signed-off-by: Axel Lin <axel.lin@ingics.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Link: http://lkml.kernel.org/r/1443709604.12993.0.camel@ingics.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-09-16genirq: Remove irq argument from irq flow handlersThomas Gleixner
Most interrupt flow handlers do not use the irq argument. Those few which use it can retrieve the irq number from the irq descriptor. Remove the argument. Search and replace was done with coccinelle and some extra helper scripts around it. Thanks to Julia for her help! Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Jiang Liu <jiang.liu@linux.intel.com>
2015-07-31irqchip/i8259: Prepare i8259_irq_dispatch for irq argument removalThomas Gleixner
Make irq a local variable and retrieve domain from the irq descriptor which avoid a redundant lookup. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ralf Baechle <ralf@linux-mips.org>
2015-07-31MIPS/irqchip: Move i8259 irqchip driver to drivers/irqchipRalf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>