From patchwork Tue Aug 3 17:51:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar Mahadev Lad X-Patchwork-Id: 491078 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9391BC4320E for ; Tue, 3 Aug 2021 17:51:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 765C360F93 for ; Tue, 3 Aug 2021 17:51:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238401AbhHCRvg (ORCPT ); Tue, 3 Aug 2021 13:51:36 -0400 Received: from relmlor1.renesas.com ([210.160.252.171]:40647 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S238316AbhHCRvg (ORCPT ); Tue, 3 Aug 2021 13:51:36 -0400 X-IronPort-AV: E=Sophos;i="5.84,292,1620658800"; d="scan'208";a="89707983" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie5.idc.renesas.com with ESMTP; 04 Aug 2021 02:51:23 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 5C7FA40BF58E; Wed, 4 Aug 2021 02:51:21 +0900 (JST) From: Lad Prabhakar To: Geert Uytterhoeven , Thomas Gleixner , Marc Zyngier , Rob Herring , Linus Walleij , Magnus Damm , linux-gpio@vger.kernel.org, devicetree@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [RFC PATCH 0/4] Renesas RZ/G2L IRQC support Date: Tue, 3 Aug 2021 18:51:05 +0100 Message-Id: <20210803175109.1729-1-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi All, The RZ/G2L Interrupt Controller is a front-end for the GIC found on Renesas RZ/G2L SoC's with below pins: - IRQ sense select for 8 external interrupts, mapped to 8 GIC SPI interrupts - GPIO pins used as external interrupt input pins out of GPIOINT0-122 a maximum of only 32 can be mapped to 32 GIC SPI interrupts, - NMI edge select. _____________ | GIC | | ________ | ____________ | | | | NMI ------------------------------------>| | SPI0-479 | | GIC-600| | _______ | |------------>| | | | | | | PPI16-31 | | | | | | IRQ0-IRQ8 | IRQC |------------>| | | P0_P48_4 ------>| GPIO |---------------->| | | |________| | | |GPIOINT0-122 | | | | | |---------------->| TINT0-31 | | | |______| |__________| |____________| The proposed RFC patches, add the IRQ domains in GPIO (pinctrl driver) and the IRQC driver. The IRQC domain handles the actual SPI interrupt and upon reception of the interrupt it propagates to the GPIO IRQ domain to handle virq. Out of GPIOINT0-122 only 32 can be mapped to GIC SPI, this mapping is handled by the IRQC driver. GPIO interrupts TINT0-T31 support rising/falling/high/low trigger, support for both falling/rising edges is handled by the SW by toggling the RISING/FALLING (we might loose interrupts, I have done limited testing for SD card detection where interrupt is requested for both rising and falling edge). Please share your valuable comments on the above implementation. Cheers, Prabhakar Lad Prabhakar (4): dt-bindings: interrupt-controller: Add Renesas RZ/G2L Interrupt Controller irqchip: Add RZ/G2L IA55 Interrupt Controller driver pinctrl: renesas: pinctrl-rzg2l: Add IRQ domain to handle GPIO interrupt arm64: dts: renesas: r9a07g044: Add IRQC node to SoC DTSI .../renesas,rzg2l-irqc.yaml | 129 ++++ arch/arm64/boot/dts/renesas/r9a07g044.dtsi | 58 ++ drivers/irqchip/Kconfig | 8 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-renesas-rzg2l.c | 557 ++++++++++++++++++ drivers/pinctrl/renesas/pinctrl-rzg2l.c | 205 +++++++ drivers/soc/renesas/Kconfig | 1 + 7 files changed, 959 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml create mode 100644 drivers/irqchip/irq-renesas-rzg2l.c