From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754044AbaKMPhb (ORCPT ); Thu, 13 Nov 2014 10:37:31 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:46314 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753304AbaKMPh3 (ORCPT ); Thu, 13 Nov 2014 10:37:29 -0500 X-Listener-Flag: 11101 From: Yingjoe Chen To: Thomas Gleixner , Jiang Liu , Marc Zyngier CC: Rob Herring , Pawel Moll , Mark Rutland , Matthias Brugger , Russell King , Jason Cooper , Yingjoe Chen , Grant Likely , Boris BREZILLON , , , , Bjorn Helgaas , Yijing Wang , , , , , , , Sascha Hauer Subject: [PATCH v6 0/6] ARM: mediatek: Add support for interrupt polarity Date: Thu, 13 Nov 2014 23:37:03 +0800 Message-ID: <1415893029-2971-1-git-send-email-yingjoe.chen@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series is 6th version of interrupt polarity support for MediaTek SoCs. This is based on tip/irq/irqdomain[1] and my mediatek SoC basic support[2]. In this version, I added a minor fix to irqdomain as first patch. Patch 3, 4 are changed to use newly added helper functions. The other patches are unchanged. Simplified block diagram for interrupt on my system: +-------+ +-------+ ---| 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. When using hierarchy irq domain, gic will use irq_domain_add_linear to create irqdomain and all interrupt numbers must come from device tree. My /proc/interrupts looks like this now: # cat /proc/interrupts CPU0 16: 149578 MT_SYSIRQ 113 mtk_timer 20: 1082 MT_SYSIRQ 54 serial Changes in v6: - Rebased to tip/irq/irqdomain [1] Changes in v5: - Discussed in [3] - Fix bug on mt6589 reported by Matthias - Fix bug for irq_find_mapping in irq_create_of_mapping - Merge Marc's change to proper handle non-DT case in gic_init_bases Changes in v4: - Discussed in [4] - Remove arm,hierarchy-irq-domain. When GIC is probed by DT, it will support hierarchy irqdomain. Changes in v3: - Discussed in [5] - First implementation using hierarchy irqdomain [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-October/297624.html [2] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-October/296093.html [3] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-October/298161.html [4] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-October/296911.html [5] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-October/293766.html Yingjoe Chen (6): irqdomain: Use consistent prototype for irq_domain_free_irqs_* 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 bindings for mediatek sysirq .../bindings/arm/mediatek/mediatek,sysirq.txt | 26 ++++ arch/arm/boot/dts/mt6589.dtsi | 14 +- arch/arm/boot/dts/mt8127.dtsi | 14 +- arch/arm/boot/dts/mt8135.dtsi | 14 +- drivers/irqchip/Kconfig | 1 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-gic.c | 80 +++++++---- drivers/irqchip/irq-mtk-sysirq.c | 156 +++++++++++++++++++++ include/linux/irq.h | 6 + include/linux/irqdomain.h | 8 +- kernel/irq/chip.c | 28 ++++ kernel/irq/irqdomain.c | 8 +- 12 files changed, 317 insertions(+), 39 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/mediatek/mediatek,sysirq.txt create mode 100644 drivers/irqchip/irq-mtk-sysirq.c -- 1.8.1.1.dirty