From patchwork Fri Jan 13 20:59:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Kemnade X-Patchwork-Id: 644785 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 79EA7C677F1 for ; Fri, 13 Jan 2023 20:59:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229509AbjAMU7n (ORCPT ); Fri, 13 Jan 2023 15:59:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42876 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229616AbjAMU7k (ORCPT ); Fri, 13 Jan 2023 15:59:40 -0500 Received: from mail.andi.de1.cc (mail.andi.de1.cc [IPv6:2a01:238:4321:8900:456f:ecd6:43e:202c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 095BE39C; Fri, 13 Jan 2023 12:59:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kemnade.info; s=20220719; h=Content-Transfer-Encoding:MIME-Version: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=7Ycz4sOcMTZWS9UTeHxz8IEHqp/XNO5Nlvj5YrrENHU=; b=IP+O+5rrpKSQ+vlYlSEio+A812 +ulVgdTMpZfDLIookFWdS5A7xFa9lfAaRmw/bx3s8Rtobfba45806uZSLAFyS4gNdoiO1BJGgkner ta580r+/Mh0ZdXXj9EH+g/fAzLoXv7ZA/Roe7qEftxpwKwsw2w9wIV9pK4psf/3TxC6WSyKSrmMeI f4x7ZKTAj8pvbRVDawW+lZMJxDCGbIvIsOJsf8coyzwVgiz/PMTd3tm/+ij6I6JNz4Nx+gWxkYkBy giozuQ7g9z/ky/noow9lU9q2dkSXyd47TWUqv7JUc1hD2pQHg8EWgI87tedcUEwU6u/UP3a1pDbcH mEsBffEw==; Received: from p200300ccff089e001a3da2fffebfd33a.dip0.t-ipconnect.de ([2003:cc:ff08:9e00:1a3d:a2ff:febf:d33a] helo=aktux) by mail.andi.de1.cc with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1pGR98-00059m-6A; Fri, 13 Jan 2023 21:59:30 +0100 Received: from andi by aktux with local (Exim 4.94.2) (envelope-from ) id 1pGR97-009hiS-Ae; Fri, 13 Jan 2023 21:59:29 +0100 From: Andreas Kemnade To: grygorii.strashko@ti.com, ssantosh@kernel.org, khilman@kernel.org, linus.walleij@linaro.org, brgl@bgdev.pl, linux-omap@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Andreas Kemnade Subject: [PATCH] gpio: omap: use dynamic allocation of base Date: Fri, 13 Jan 2023 21:59:22 +0100 Message-Id: <20230113205922.2312951-1-andreas@kemnade.info> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Static allocatin is deprecated and may cause probe mess, if probe order is unusual. like this example [ 2.553833] twl4030_gpio twl4030-gpio: gpio (irq 145) chaining IRQs 161..178 [ 2.561401] gpiochip_find_base: found new base at 160 [ 2.564392] gpio gpiochip5: (twl4030): added GPIO chardev (254:5) [ 2.564544] gpio gpiochip5: registered GPIOs 160 to 177 on twl4030 [...] [ 2.692169] omap-gpmc 6e000000.gpmc: GPMC revision 5.0 [ 2.697357] gpmc_mem_init: disabling cs 0 mapped at 0x0-0x1000000 [ 2.703643] gpiochip_find_base: found new base at 178 [ 2.704376] gpio gpiochip6: (omap-gpmc): added GPIO chardev (254:6) [ 2.704589] gpio gpiochip6: registered GPIOs 178 to 181 on omap-gpmc [...] [ 2.840393] gpio gpiochip7: Static allocation of GPIO base is deprecated, use dynamic allocation. [ 2.849365] gpio gpiochip7: (gpio-160-191): GPIO integer space overlap, cannot add chip [ 2.857513] gpiochip_add_data_with_key: GPIOs 160..191 (gpio-160-191) failed to register, -16 [ 2.866149] omap_gpio 48310000.gpio: error -EBUSY: Could not register gpio chip So probing was done in an unusual order, causing mess and chips not getting their gpio in the end. Signed-off-by: Andreas Kemnade --- maybe CC stable? not sure about good fixes tag. drivers/gpio/gpio-omap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 80ddc43fd875..f5f3d4b22452 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -1020,7 +1020,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc, if (!label) return -ENOMEM; bank->chip.label = label; - bank->chip.base = gpio; + bank->chip.base = -1; } bank->chip.ngpio = bank->width;