From mboxrd@z Thu Jan 1 00:00:00 1970 From: marc.zyngier@arm.com (Marc Zyngier) Date: Tue, 2 Dec 2014 16:58:01 +0000 Subject: [PATCH 00/16] irqchip: gic: killing gic_arch_extn, slowly Message-ID: <1417539497-20101-1-git-send-email-marc.zyngier@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The gic_arch_extn hack that a number of platform use has been nagging me for too long. It is only there for the benefit of a few platform, and yet it impacts all GIC users. Moreover, it gives people the wrong idea ("let's use it to put some new custom hack in there"...). But now that stacked irq domains have landed in -next, the time has come for gic_arch_extn to meet the Big Bit Bucket. This patch series takes several steps towards the elimination of gic_arch_extn: - moves Tegra's legacy interrupt controller support to drivers/irqchip, implementing a stacked domain on top of the standard GIC. - OMAP, imx6 and exynos are also converted to stacked domains, but their implementation is left in place (the code is far too intricately mixed with other details of the platform for me to even try to move it). - shmobile, ux500 and zynq are only slightly modified. - The GIC itself is cleaned up, and some other bits and bobs are adjusted for a good measure. It is worth realizing that: - I haven't been able to test this as much as I would have wanted to (it's only been tested on tegra2 and omap5). - I've created DT bindings when needed, updated existing ones, but I haven't created a binding for platforms that already used an undocumented one (imx6, I'm looking at you). - I've relaxed quite a bit of the locking in the GIC code. I believe this is safe, but someone else should give it a long hard look. - This actively *breaks* existing setups. Once you boot a new kernel with an old DT, suspend/resume *will* be broken. Old kernels on a new DT won't even boot! You've been warned. This really outline the necessity of actually describing the HW in device trees... As for the patches, they are on top of 3.18-rc7 + tip/irq/irqdomain-arm. I've pushed the code to: git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git irq/die-gic-arch-extn-die-die-die Comments welcome, M. Marc Zyngier (16): ARM: tegra: irq: nuke leftovers from non-DT support irqchip: tegra: add DT-based support for legacy interrupt controller ARM: tegra: skip gic_arch_extn setup if DT has a LIC node ARM: tegra: update DTs to expose legacy interrupt controller DT: tegra: add binding for the legacy interrupt controller ARM: tegra: remove old LIC support ARM: omap: convert wakeupgen to stacked domains DT: omap4/5: add binding for the wake-up generator ARM: imx6: convert wakeupgen to stacked domains ARM: exynos4/5: convert pmu wakeup to stacked domains DT: exynos: update PMU binding irqchip: gic: add an entry point to set up irqchip flags ARM: shmobile: remove use of gic_arch_extn.irq_set_wake ARM: ux500: switch from gic_arch_extn to gic_set_irqchip_flags ARM: zynq: switch from gic_arch_extn to gic_set_irqchip_flags irqchip: gic: Drop support for gic_arch_extn .../devicetree/bindings/arm/samsung/pmu.txt | 13 + .../interrupt-controller/nvidia,tegra-ictlr.txt | 39 +++ .../interrupt-controller/ti,omap4-wugen-mpu | 32 ++ arch/arm/boot/dts/am4372.dtsi | 11 +- arch/arm/boot/dts/dra7.dtsi | 12 +- arch/arm/boot/dts/exynos4.dtsi | 3 + arch/arm/boot/dts/exynos5250.dtsi | 3 + arch/arm/boot/dts/imx6qdl.dtsi | 6 +- arch/arm/boot/dts/imx6sl.dtsi | 5 +- arch/arm/boot/dts/imx6sx.dtsi | 5 +- arch/arm/boot/dts/omap4.dtsi | 12 +- arch/arm/boot/dts/omap5.dtsi | 12 +- arch/arm/boot/dts/tegra114.dtsi | 16 +- arch/arm/boot/dts/tegra124.dtsi | 16 +- arch/arm/boot/dts/tegra20.dtsi | 15 +- arch/arm/boot/dts/tegra30.dtsi | 16 +- arch/arm/mach-exynos/exynos.c | 12 +- arch/arm/mach-exynos/pm.c | 116 ++++++- arch/arm/mach-imx/common.h | 1 - arch/arm/mach-imx/gpc.c | 127 ++++++-- arch/arm/mach-imx/mach-imx6q.c | 1 - arch/arm/mach-imx/mach-imx6sl.c | 1 - arch/arm/mach-imx/mach-imx6sx.c | 1 - arch/arm/mach-omap2/omap-wakeupgen.c | 125 ++++++-- arch/arm/mach-omap2/omap-wakeupgen.h | 1 - arch/arm/mach-omap2/omap4-common.c | 1 - arch/arm/mach-shmobile/intc-sh73a0.c | 7 +- arch/arm/mach-shmobile/setup-r8a7779.c | 7 +- arch/arm/mach-tegra/iomap.h | 15 - arch/arm/mach-tegra/irq.c | 208 +------------ arch/arm/mach-tegra/irq.h | 6 - arch/arm/mach-tegra/tegra.c | 1 - arch/arm/mach-ux500/cpu.c | 2 +- arch/arm/mach-zynq/common.c | 2 +- drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-gic.c | 59 +--- drivers/irqchip/irq-tegra.c | 335 +++++++++++++++++++++ include/linux/irqchip/arm-gic.h | 3 +- 38 files changed, 869 insertions(+), 379 deletions(-) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra-ictlr.txt create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,omap4-wugen-mpu create mode 100644 drivers/irqchip/irq-tegra.c -- 2.1.3