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2017-06-22irqchip/sunxi-nmi: Support sun6i-a31-r-intc compatibleChen-Yu Tsai1-3/+26
The R_INTC on the A31 is undocumented. It was previously supported by the sun6i-a31-sc-nmi compatible. This compatible however required the register region to start at the first used register, rather than the boundaries laid out in the SoC's memory map. The new compatible fixes the alignment, while also naming it properly. Since the only difference between the old and new compatibles are a fixed offset for the registers, and since the old one is deprecated, this patch adds a set of register defines for the new compatible, while modifying the old set to reference the new set minus a fixed offset. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-06-22irqchip/sunxi-nmi: Const-ify sunxi_sc_nmi_reg_offs structuresChen-Yu Tsai1-4/+4
The sunxi_sc_nmi_reg_offs, which hold the register offsets for the various variants, is never modified, and only used at init time within the init functions referenced by IRQCHIP_DECLARE, which themselves are tagged __init. Const-ify the sunxi_sc_nmi_reg_offs structures, and tag them as __initconst. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-06-22irqchip/sunxi-nmi: Reorder sunxi_sc_nmi_reg_offs' in ascending orderChen-Yu Tsai1-6/+6
This is a pure code move to reorder the various sunxi_sc_nmi_reg_offs' by family and alphabetical order. No functionality changes. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-06-22irqchip/sunxi-nmi: Document interrupt disabling and clearing at probe timeChen-Yu Tsai1-0/+3
The sunxi-nmi disables all its interrupts and clears any pending interrupts at probe time. Add comments documenting it, just to make it clear. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-06-22irqchip/sunxi-nmi: Convert magic numbers to definesChen-Yu Tsai1-10/+24
The sunxi-nmi driver has a bunch of raw register offsets and bit values. Convert them into define macros for better readability. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-03-10irqchip/sunxi-nmi: Fix error check of of_io_request_and_map()Vladimir Zapolskiy1-2/+2
The of_io_request_and_map() returns a valid pointer in iomem region or ERR_PTR(), check for NULL always fails and may cause a NULL pointer dereference on error path. Fixes: 0e841b04c829 ("irqchip/sunxi-nmi: Switch to of_io_request_and_map() from of_iomap()") Signed-off-by: Vladimir Zapolskiy <vz@mleia.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Chen-Yu Tsai <wens@csie.org> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1457486489-10189-1-git-send-email-vz@mleia.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-12-03irqchip/sunxi-nmi: Support sun9i A80 NMI controllerChen-Yu Tsai1-0/+13
The A80 moves the NMI controller into the PRCM address space, and also rearranges the registers. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Link: https://lkml.kernel.org/r/1449130813-22400-4-git-send-email-wens@csie.org Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-10-09irqchip/sunxi-nmi: Switch to of_io_request_and_map() from of_iomap()Chen-Yu Tsai1-1/+1
Switch to the new of_io_request_and_map() call, so the IO resource is properly held, and also shows up in /proc/iomem. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Cc: linux-arm-kernel@lists.infradead.org Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Link: http://lkml.kernel.org/r/1444063334-19832-3-git-send-email-wens@csie.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-09irqchip/sunxi-nmi: Use driver name instead of DT node name for identificationChen-Yu Tsai1-9/+11
The device tree node name is typically "interrupt-controller", which is rather useless when used in printk messages and irq chip names for identification purposes. Use the driver name "sunxi-nmi" instead. While at it move the identifier from pr_err() calls to the pr_fmt macro. Also remove the "__func__" identifier from the error message in the interrupt type setting callback, sunxi_sc_nmi_set_type(). The driver name in the pr_fmt macro should be enough. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Cc: linux-arm-kernel@lists.infradead.org Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Link: http://lkml.kernel.org/r/1444063334-19832-2-git-send-email-wens@csie.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-09-16genirq: Remove irq argument from irq flow handlersThomas Gleixner1-1/+1
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>
2015-07-11irqchip: Use irq_desc_get_xxx() to avoid redundant lookup of irq_descJiang Liu1-1/+1
Use irq_desc_get_xxx() to avoid redundant lookup of irq_desc while we already have a pointer to corresponding irq_desc. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Link: http://lkml.kernel.org/r/1433391238-19471-11-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-11irqchip/sunxi-nmi: Consolidate chained IRQ handler install/removeThomas Gleixner1-2/+1
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. Search and conversion was done with coccinelle: @@ expression E1, E2, E3; @@ ( -if (irq_set_handler_data(E1, E2) != 0) - BUG(); | -irq_set_handler_data(E1, E2); ) -irq_set_chained_handler(E1, E3); +irq_set_chained_handler_and_data(E1, E3, E2); @@ expression E1, E2, E3; @@ ( -if (irq_set_handler_data(E1, E2) != 0) - BUG(); ... | -irq_set_handler_data(E1, E2); ... ) -irq_set_chained_handler(E1, E3); +irq_set_chained_handler_and_data(E1, E3, E2); Reported-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: linux-arm-kernel@lists.infradead.org
2015-07-11irqchip: Prepare for local stub header removalJoel Porquet1-1/+1
The IRQCHIP_DECLARE macro moved to to 'include/linux/irqchip.h', so the local irqchip.h became an empty shell, which solely includes include/linux/irqchip.h Include the global header in all irqchip drivers instead of the local header, so we can remove it. Signed-off-by: Joel Porquet <joel@porquet.org> Cc: vgupta@synopsys.com Cc: monstr@monstr.eu Cc: ralf@linux-mips.org Cc: jason@lakedaemon.net Link: http://lkml.kernel.org/r/1882096.X39jVG8e0D@joel-zenbook Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-06-08irqchip: sunxi-nmi: Fix off-by-one error in irq iteratorAxel Lin1-1/+1
Fixes: 6058bb362818 'ARM: sun7i/sun6i: irqchip: Add irqchip driver for NMI controller' Signed-off-by: Axel Lin <axel.lin@ingics.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Carlo Caione <carlo@caione.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1433684009.9134.1.camel@ingics.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-11-09genirq: Generic chip: Change irq_reg_{readl,writel} argumentsKevin Cernekee1-2/+2
Pass in the irq_chip_generic struct so we can use different readl/writel settings for each irqchip driver, when appropriate. Compute (gc->reg_base + reg_offset) in the helper function because this is pretty much what all callers want to do anyway. Compile-tested using the following configurations: at91_dt_defconfig (CONFIG_ATMEL_AIC_IRQ=y) sama5_defconfig (CONFIG_ATMEL_AIC5_IRQ=y) sunxi_defconfig (CONFIG_ARCH_SUNXI=y) tb10x (ARC) is untested. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Acked-by: Arnd Bergmann <arnd@arndb.de> Link: https://lkml.kernel.org/r/1415342669-30640-3-git-send-email-cernekee@gmail.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-03-31irqchip: sun7i/sun6i: Disable NMI before registering the handlerHans de Goede1-3/+3
It is advisable to disable the NMI before registering the IRQ handler as registering the IRQ handler unmasks the IRQ on the GIC, so if U-Boot has left the NMI enabled and the NMI pin is active we will immediately get an interrupt before any driver has claimed the downstream interrupt of the NMI. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Carlo Caione <carlo@caione.org> Cc: maxime.ripard@free-electrons.com Cc: linux-arm-kernel@lists.infradead.org Cc: linux-sunxi@googlegroups.com Link: http://lkml.kernel.org/r/1395939759-11135-3-git-send-email-carlo@caione.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-03-26ARM: sun7i/sun6i: irqchip: Add irqchip driver for NMI controllerCarlo Caione1-0/+208
Allwinner A20/A31 SoCs have special registers to control / (un)mask / acknowledge NMI. This NMI controller is separated and independent from GIC. This patch adds a new irqchip to manage NMI. Signed-off-by: Carlo Caione <carlo@caione.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-sunxi@googlegroups.com Cc: mark.rutland@arm.com Cc: hdegoede@redhat.com Link: http://lkml.kernel.org/r/1395256879-8475-2-git-send-email-carlo@caione.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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