Rename the functions including jz4740 in their names to be more generic
in preparation for supporting further SoCs, and for moving this
interrupt controller code to drivers/irqchip.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Patchwork: https://patchwork.linux-mips.org/patch/10146/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Read the base address of the SoC interrupt controller from the device
tree rather than relying upon the JZ4740_INTC_BASE_ADDR macro, in order
to remove the dependency on the asm/mach-jz4740/base.h header.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10145/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

On newer Ingenic SoCs the interrupt controller supports more than 32
interrupts, which it does by duplicating the registers at intervals
of 0x20 bytes within its address space. Add support for an arbitrary
number of interrupts using multiple generic chips, and provide the
number of chips to register from the interrupt controller probe
function.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10141/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Avoid the need for the global variable jz_intc_base by introducing a
struct ingenic_intc_data and passing it around as the IRQ handler data.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10144/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The debugfs code becomes a nuisance when attempting to avoid globals,
since the interrupt controller probe function run too early for it to be
safe to create the debugfs files. Drop it.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10139/Acked-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

When probing the interrupt controller, register an IRQ domain such
that the interrupts can be translated by devicetree code & thus used
from devicetree.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10140/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Rather than hardcoding the IRQ number used to cascade interrupts from
the SoC interrupt controller to the CPU interrupt controller, read that
IRQ number from the DT describing the system.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10137/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Declare the JZ4740 interrupt controller for probe via DT using the
standard irqchip_init function, and make use of that function to probe
the controller by adding the appropriate node to the JZ4740 dtsi.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: devicetree@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10135/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

In preparation for moving the JZ4740 interrupt controller driver to
drivers/irqchip, move arch_init_irq into setup.c such that everything
remaining in irq.c is related to said JZ4740 interrupt controller.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10136/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Make use of the generic plat_irq_dispatch function introduced by commit
85f7cdac "MIPS: Provide a generic plat_irq_dispatch", in order to
reduce unnecessary code duplication.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10138/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Use the generic irqchip_init function to probe irqchip drivers using DT,
and add the appropriate node to the JZ4740 devicetree in place of the
call to mips_cpu_irq_init.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Patchwork: https://patchwork.linux-mips.org/patch/10166/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Fixes sparse warnings:

  arch/mips/jz4740/irq.c:63:6: warning: symbol 'jz4740_irq_suspend' was not declared. Should it be static?
  arch/mips/jz4740/irq.c:69:6: warning: symbol 'jz4740_irq_resume' was not declared. Should it be static?

Also, I've seen some elusive build errors on my automated build test
where JZ4740_IRQ_BASE and NR_IRQS are missing, but I can't reproduce
them manually for some reason. Anyway, mach-jz4740/irq.h should help us
avoid relying on some implicit include.
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8724/Acked-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Having received another series of whitespace patches I decided to do this
once and for all rather than dealing with this kind of patches trickling
in forever.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Use the generic irq chip framework to implement the jz4740 INTC and GPIO irq
chips.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2434/
Patchwork: https://patchwork.linux-mips.org/patch/2771/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Scripted with coccinelle.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

Convert the JZ4740 intc and gpio irq chips to use newstyle irq functions.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2181/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Add support for IRQ handling on a JZ4740 SoC.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1465/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>