From: Joe.C <yingjoe.chen@mediatek.com>
To: arm@kernel.org, Rob Herring <robh+dt@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Jiang Liu <jiang.liu@linux.intel.com>,
Marc Zyngier <marc.zyngier@arm.com>,
Mark Rutland <mark.rutland@arm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Sricharan R <r.sricharan@ti.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Russell King <linux@arm.linux.org.uk>,
yingjoe.chen@gmail.com, yh.chen@mediatek.com,
nathan.chung@mediatek.com, Grant Likely <grant.likely@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
devicetree@vger.kernel.org, Jason Cooper <jason@lakedaemon.net>,
Pawel Moll <pawel.moll@arm.com>, Matt Porter <mporter@linaro.org>,
Marc Carino <marc.ceeeee@gmail.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
eddie.huang@mediatek.com, linux-arm-kernel@lists.infradead.org,
srv_heupstream@mediatek.com, hc.yen@mediatek.com,
linux-kernel@vger.kernel.org,
Santosh Shilimkar <santosh.shilimkar@ti.com>,
Sascha Hauer <kernel@pengutronix.de>,
Olof Johansson <olof@lixom.net>
Subject: [PATCH v3 0/7] ARM: mediatek: Add support for interrupt polarity
Date: Thu, 9 Oct 2014 22:29:33 +0800 [thread overview]
Message-ID: <1412864980-20273-1-git-send-email-yingjoe.chen@mediatek.com> (raw)
This series is 3rd version of interrupt polarity support for MediaTek
SoCs. Unlike previous attempts[1], this version is implemented with hierarchy
irqdomain. This is based on Jiang's hierarchy irqdomain v2 [2] and my
mediatek SoC basic support [3].
Simplified block diagram for interrupt:
+-------+ +-------+
---| SYSIRQ|------|ARM GIC|
---| |------| |
---| |------| |
---| |------| |
---| |------| |
+-------+ +-------+
In device tree, interrupt-parent for other devices is sysirq, child of gic.
This describe HW better and allow device to specify polarity as it is sent
by the device.
In order to use hierarchy irq domain, gic can't use legacy irq domain anymore.
When arm,hierarchy-irq-domain property is specified, GIC will work in hierarchy
way and all interrupt numbers must be set by device tree. My /proc/interrupts
looks like this:
# cat /proc/interrupts
CPU0
16: 1862 MT_SYSIRQ 113 mtk_timer
17: 67 MT_SYSIRQ 54 mtk-uart
[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-August/279052.html
[2] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/290832.html
[3] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/284553.html
Joe.C (7):
irqdomain: Fix irq_domain_alloc_irqs return check.
genirq: Add more helper functions to support stacked irq_chip
irqchip: gic: Support hierarchy irq domain.
ARM: mediatek: Add sysirq interrupt polarity support
ARM: mediatek: Add sysirq in mt6589/mt8135/mt8127 dtsi
dt-bindings: add irq domain parent binding
dt-bindings: add bindings for mediatek sysirq
Documentation/devicetree/bindings/arm/gic.txt | 2 +
.../bindings/arm/mediatek/mediatek,sysirq.txt | 19 +++
arch/arm/boot/dts/mt6589.dtsi | 14 +-
arch/arm/boot/dts/mt8127.dtsi | 14 +-
arch/arm/boot/dts/mt8135.dtsi | 14 +-
arch/arm/mach-mediatek/Kconfig | 1 +
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-gic.c | 56 ++++++-
drivers/irqchip/irq-mt65xx-sysirq.c | 170 +++++++++++++++++++++
include/linux/irq.h | 5 +
kernel/irq/chip.c | 28 ++++
kernel/irq/irqdomain.c | 2 +-
12 files changed, 311 insertions(+), 15 deletions(-)
create mode 100644 Documentation/devicetree/bindings/arm/mediatek/mediatek,sysirq.txt
create mode 100644 drivers/irqchip/irq-mt65xx-sysirq.c
next reply other threads:[~2014-10-09 14:29 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-09 14:29 Joe.C [this message]
2014-10-09 14:29 ` [PATCH v3 1/7] irqdomain: Fix irq_domain_alloc_irqs return check Joe.C
2014-10-13 12:11 ` Marc Zyngier
[not found] ` <543BC186.2050701-5wv7dgnIgG8@public.gmane.org>
2014-10-13 14:13 ` Jiang Liu
2014-10-09 14:29 ` [PATCH v3 2/7] genirq: Add more helper functions to support stacked irq_chip Joe.C
2014-10-09 14:29 ` [PATCH v3 3/7] irqchip: gic: Support hierarchy irq domain Joe.C
2014-10-09 16:59 ` Marc Zyngier
[not found] ` <5436BF0C.1030508-5wv7dgnIgG8@public.gmane.org>
2014-10-09 17:22 ` Arnd Bergmann
2014-10-13 10:43 ` Joe.C
2014-10-13 12:10 ` Marc Zyngier
2014-10-13 19:51 ` Arnd Bergmann
2014-10-13 8:56 ` Marc Zyngier
[not found] ` <543B93B4.3040404-5wv7dgnIgG8@public.gmane.org>
2014-10-13 9:25 ` Marc Zyngier
2014-10-13 9:27 ` Arnd Bergmann
2014-10-13 9:44 ` Marc Zyngier
2014-10-09 14:29 ` [PATCH v3 4/7] ARM: mediatek: Add sysirq interrupt polarity support Joe.C
2014-10-09 14:37 ` Arnd Bergmann
2014-10-09 14:53 ` Joe.C
2014-10-13 13:43 ` Matthias Brugger
2014-10-13 14:14 ` Matthias Brugger
2014-10-09 14:29 ` [PATCH v3 5/7] ARM: mediatek: Add sysirq in mt6589/mt8135/mt8127 dtsi Joe.C
2014-10-09 14:29 ` [PATCH v3 6/7] dt-bindings: add irq domain parent binding Joe.C
[not found] ` <1412864980-20273-7-git-send-email-yingjoe.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2014-10-09 14:57 ` Mark Rutland
2014-10-09 14:29 ` [PATCH v3 7/7] dt-bindings: add bindings for mediatek sysirq Joe.C
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