{"id":2229201,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2229201/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-gpio/patch/20260427214311.331996-1-mohamedaymanworkspace@gmail.com/","project":{"id":42,"url":"http://patchwork.ozlabs.org/api/1.1/projects/42/?format=json","name":"Linux GPIO development","link_name":"linux-gpio","list_id":"linux-gpio.vger.kernel.org","list_email":"linux-gpio@vger.kernel.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260427214311.331996-1-mohamedaymanworkspace@gmail.com>","date":"2026-04-27T21:43:10","name":"gpio: ixp4xx: switch to dynamic GPIO base","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"1325ee7d7161b6d9ecb8a3a6f73343cdacddc381","submitter":{"id":92749,"url":"http://patchwork.ozlabs.org/api/1.1/people/92749/?format=json","name":"Mohamed Ayman","email":"mohamedaymanworkspace@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-gpio/patch/20260427214311.331996-1-mohamedaymanworkspace@gmail.com/mbox/","series":[{"id":501730,"url":"http://patchwork.ozlabs.org/api/1.1/series/501730/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-gpio/list/?series=501730","date":"2026-04-27T21:43:10","name":"gpio: ixp4xx: switch to dynamic GPIO base","version":1,"mbox":"http://patchwork.ozlabs.org/series/501730/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2229201/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2229201/checks/","tags":{},"headers":{"Return-Path":"\n <linux-gpio+bounces-35632-incoming=patchwork.ozlabs.org@vger.kernel.org>","X-Original-To":["incoming@patchwork.ozlabs.org","linux-gpio@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=r5n2ctel;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; helo=sea.lore.kernel.org;\n envelope-from=linux-gpio+bounces-35632-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com\n header.b=\"r5n2ctel\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=209.85.221.52","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=gmail.com"],"Received":["from sea.lore.kernel.org (sea.lore.kernel.org [172.234.253.10])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g4HJ64nNpz1xvV\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 28 Apr 2026 07:48:38 +1000 (AEST)","from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sea.lore.kernel.org (Postfix) with ESMTP id 5714630B1851\n\tfor <incoming@patchwork.ozlabs.org>; Mon, 27 Apr 2026 21:43:30 +0000 (UTC)","from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 5474639FCD2;\n\tMon, 27 Apr 2026 21:43:22 +0000 (UTC)","from mail-wr1-f52.google.com (mail-wr1-f52.google.com\n [209.85.221.52])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 23D3238B7BD\n\tfor <linux-gpio@vger.kernel.org>; Mon, 27 Apr 2026 21:43:19 +0000 (UTC)","by mail-wr1-f52.google.com with SMTP id\n ffacd0b85a97d-43cf7683a28so7151482f8f.2\n        for <linux-gpio@vger.kernel.org>;\n Mon, 27 Apr 2026 14:43:19 -0700 (PDT)","from ST.. 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<mohamedaymanworkspace@gmail.com>","To":"Linus Walleij <linusw@kernel.org>,\n\tImre Kaloz <kaloz@openwrt.org>,\n\tBartosz Golaszewski <brgl@kernel.org>,\n\tlinux-arm-kernel@lists.infradead.org (moderated list:ARM/INTEL IXP4XX ARM\n ARCHITECTURE),\n\tlinux-gpio@vger.kernel.org (open list:GPIO SUBSYSTEM),\n\tlinux-kernel@vger.kernel.org (open list)","Cc":"Mohamed Ayman <mohamedaymanworkspace@gmail.com>,\n\tlinux-arm-kernel@lists.infradead.org (moderated list:ARM/INTEL IXP4XX ARM\n ARCHITECTURE),\n\tlinux-gpio@vger.kernel.org (open list:GPIO SUBSYSTEM),\n\tlinux-kernel@vger.kernel.org (open list)","Subject":"[PATCH] gpio: ixp4xx: switch to dynamic GPIO base","Date":"Tue, 28 Apr 2026 00:43:10 +0300","Message-Id":"<20260427214311.331996-1-mohamedaymanworkspace@gmail.com>","X-Mailer":"git-send-email 2.34.1","Precedence":"bulk","X-Mailing-List":"linux-gpio@vger.kernel.org","List-Id":"<linux-gpio.vger.kernel.org>","List-Subscribe":"<mailto:linux-gpio+subscribe@vger.kernel.org>","List-Unsubscribe":"<mailto:linux-gpio+unsubscribe@vger.kernel.org>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit"},"content":"Most IXP4xx platforms are Device Tree-based, and GPIO consumers\nuse phandle-based descriptors rather than legacy integer GPIO numbers.\n\nAudit of the IXP4xx platform shows:\n- No gpio_request(), gpio_get_value(), or gpio_set_value() users\n  in arch/arm/mach-ixp4xx/\n- No platform data using fixed GPIO numbers\n\nThis switches the gpiochip to dynamic base allocation, aligning\nwith modern gpiolib expectations where GPIO numbers are not globally\nfixed and may be assigned dynamically.\n\nSet gpiochip.base = -1 to allow gpiolib to assign the GPIO base\ndynamically, avoiding global GPIO number space conflicts.\n\nSigned-off-by: Mohamed Ayman <mohamedaymanworkspace@gmail.com>\n---\n drivers/gpio/gpio-ixp4xx.c | 7 +------\n 1 file changed, 1 insertion(+), 6 deletions(-)","diff":"diff --git a/drivers/gpio/gpio-ixp4xx.c b/drivers/gpio/gpio-ixp4xx.c\nindex f34d87869c8b..669b139cd499 100644\n--- a/drivers/gpio/gpio-ixp4xx.c\n+++ b/drivers/gpio/gpio-ixp4xx.c\n@@ -311,12 +311,7 @@ static int ixp4xx_gpio_probe(struct platform_device *pdev)\n \t}\n \tg->chip.gc.ngpio = 16;\n \tg->chip.gc.label = \"IXP4XX_GPIO_CHIP\";\n-\t/*\n-\t * TODO: when we have migrated to device tree and all GPIOs\n-\t * are fetched using phandles, set this to -1 to get rid of\n-\t * the fixed gpiochip base.\n-\t */\n-\tg->chip.gc.base = 0;\n+\tg->chip.gc.base = -1;\n \tg->chip.gc.parent = &pdev->dev;\n \tg->chip.gc.owner = THIS_MODULE;\n \n","prefixes":[]}