From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 D35DFC43387 for ; Wed, 19 Dec 2018 22:11:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A1F4D20879 for ; Wed, 19 Dec 2018 22:11:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="VA870PGR"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="AVM0Aw3d" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729718AbeLSWLe (ORCPT ); Wed, 19 Dec 2018 17:11:34 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:44474 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729587AbeLSWLb (ORCPT ); Wed, 19 Dec 2018 17:11:31 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id C8362608C5; Wed, 19 Dec 2018 22:11:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1545257490; bh=vgKObgUP3PBENRIoVDIXRGSK16opUVYnkrhtJlTmOTY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VA870PGRcX8Fz5IANYo5J6ouj/C9w5RXqAtgZ6t3ylpPxVWTMKpFm1S5XPmAHXm8L IjFz5zIG1PDpmf6f9/UvzCW9BceZcJf27qDw11xdtTO0LpDXZDZrI/4nMLRR1uQC5y YILZjPNFdI1ZetYu+a9Kje5w0Usy7QcbPMMSsz2U= Received: from codeaurora.org (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: ilina@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id C5CC1606FC; Wed, 19 Dec 2018 22:11:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1545257489; bh=vgKObgUP3PBENRIoVDIXRGSK16opUVYnkrhtJlTmOTY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AVM0Aw3dxc1UA4m1uW4Fc6ps/Fd25wa0zyZUVBlh2SSeDZfUyyAmEs5rfwjAXWM+E oQNwD8zrkihqheiMQk0D8VpZuckz7xtM4SWYpzZ3jFQmBFMbSqDDc7rwyxBXLIoAOv fIJWvSfr/P0WAVeRJ4bsYJCiz667WTo9e0GfPxO4= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org C5CC1606FC Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=ilina@codeaurora.org From: Lina Iyer To: sboyd@kernel.org, evgreen@chromium.org, marc.zyngier@arm.com Cc: linux-kernel@vger.kernel.org, rplsssn@codeaurora.org, linux-arm-msm@vger.kernel.org, thierry.reding@gmail.com, bjorn.andersson@linaro.org, Thierry Reding Subject: [PATCH 1/7] gpio: Add support for hierarchical IRQ domains Date: Wed, 19 Dec 2018 15:10:59 -0700 Message-Id: <20181219221105.3004-2-ilina@codeaurora.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20181219221105.3004-1-ilina@codeaurora.org> References: <20181219221105.3004-1-ilina@codeaurora.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Thierry Reding Hierarchical IRQ domains can be used to stack different IRQ controllers on top of each other. One specific use-case where this can be useful is if a power management controller has top-level controls for wakeup interrupts. In such cases, the power management controller can be a parent to other interrupt controllers and program additional registers when an IRQ has its wake capability enabled or disabled. Signed-off-by: Thierry Reding --- drivers/gpio/gpiolib.c | 15 +++++++++++---- include/linux/gpio/driver.h | 6 ++++++ 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 230e41562462..eb08de2e7c1d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1917,7 +1917,9 @@ static int gpiochip_add_irqchip(struct gpio_chip *gpiochip, type = IRQ_TYPE_NONE; } - gpiochip->to_irq = gpiochip_to_irq; + if (!gpiochip->to_irq) + gpiochip->to_irq = gpiochip_to_irq; + gpiochip->irq.default_type = type; gpiochip->irq.lock_key = lock_key; gpiochip->irq.request_key = request_key; @@ -1927,9 +1929,14 @@ static int gpiochip_add_irqchip(struct gpio_chip *gpiochip, else ops = &gpiochip_domain_ops; - gpiochip->irq.domain = irq_domain_add_simple(np, gpiochip->ngpio, - gpiochip->irq.first, - ops, gpiochip); + if (gpiochip->irq.parent_domain) + gpiochip->irq.domain = irq_domain_add_hierarchy(gpiochip->irq.parent_domain, + 0, gpiochip->ngpio, + np, ops, gpiochip); + else + gpiochip->irq.domain = irq_domain_add_simple(np, gpiochip->ngpio, + gpiochip->irq.first, + ops, gpiochip); if (!gpiochip->irq.domain) return -EINVAL; diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 2db62b550b95..abcdb0c25a93 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -47,6 +47,12 @@ struct gpio_irq_chip { */ const struct irq_domain_ops *domain_ops; + /** + * @parent_domain: + * + */ + struct irq_domain *parent_domain; + /** * @handler: * -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project