From patchwork Thu Mar 17 01:24:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar X-Patchwork-Id: 12783396 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 88B32C433F5 for ; Thu, 17 Mar 2022 01:24:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356248AbiCQBZq (ORCPT ); Wed, 16 Mar 2022 21:25:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37322 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1358265AbiCQBZp (ORCPT ); Wed, 16 Mar 2022 21:25:45 -0400 Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6CC7B1EAC8; Wed, 16 Mar 2022 18:24:24 -0700 (PDT) X-IronPort-AV: E=Sophos;i="5.90,188,1643641200"; d="scan'208";a="114675307" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 17 Mar 2022 10:24:24 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 76F4F41A4262; Thu, 17 Mar 2022 10:24:21 +0900 (JST) From: Lad Prabhakar To: Thomas Gleixner , Marc Zyngier , Rob Herring , Linus Walleij , Bartosz Golaszewski , Geert Uytterhoeven , Philipp Zabel Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [RFC PATCH v4 4/5] gpio: gpiolib: Add ngirq member to struct gpio_irq_chip Date: Thu, 17 Mar 2022 01:24:03 +0000 Message-Id: <20220317012404.8069-5-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220317012404.8069-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220317012404.8069-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Supported GPIO IRQs by the chip is not always equal to the number of GPIO pins. For example on Renesas RZ/G2L SoC where it has GPIO0-122 pins but at a give point a maximum of only 32 GPIO pins can be used as IRQ lines in the IRQC domain. This patch adds ngirq member to struct gpio_irq_chip and passes this as a size to irq_domain_create_hierarchy()/irq_domain_create_simple() if it is being set in the driver otherwise fallbacks to using ngpio. Signed-off-by: Lad Prabhakar --- drivers/gpio/gpiolib.c | 4 ++-- include/linux/gpio/driver.h | 8 ++++++++ 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index aede442f610d..8784d11f8a15 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1221,7 +1221,7 @@ static int gpiochip_hierarchy_add_domain(struct gpio_chip *gc) gc->irq.domain = irq_domain_create_hierarchy( gc->irq.parent_domain, 0, - gc->ngpio, + gc->irq.ngirq ?: gc->ngpio, gc->irq.fwnode, &gc->irq.child_irq_domain_ops, gc); @@ -1564,7 +1564,7 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc, } else { /* Some drivers provide custom irqdomain ops */ gc->irq.domain = irq_domain_create_simple(fwnode, - gc->ngpio, + gc->irq.ngirq ?: gc->ngpio, gc->irq.first, gc->irq.domain_ops ?: &gpiochip_domain_ops, gc); diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index b0728c8ad90c..eada90d59657 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -51,6 +51,14 @@ struct gpio_irq_chip { */ const struct irq_domain_ops *domain_ops; + /** + * @ngirq: + * + * The number of GPIO IRQ's handled by this IRQ domain; usually is + * equal to ngpio. + */ + u16 ngirq; + #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY /** * @fwnode: