From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 92F3A20C030; Tue, 18 Mar 2025 13:48:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742305693; cv=none; b=lujTgRN1fHUmhaO/gDSq2ncE9cIRG51DoQ+2JpBtJrkhc/mYpeID0IugjWbZ/UpLEVyZF/VD2rQ0MfnP79m89h7IQLVzmzD+1exRiPR6pRnhjtfj3/7vS6Bw8Bt0FtPeQisXwrLDJKf+KhGNK8jHkE9mQIPNKXlRh9RbF9/4llg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742305693; c=relaxed/simple; bh=h/EuhGrH0PIQblMJgGKwYrojTphVCdZ+DS9FajtTK/o=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=LpDR81WFmsCXxAPwOfeSBO4cRZuUGVVepV2cbwyJOyY519NYDw1AYQk3UbGB1OKXKHPGhB26INEX2HXVmRN0UfhPiZYA4jEByuCrEZVqklx/Ax+a1X3LPD81sIyDYLfq4GfKRrryKNbn+x8CMn+/GlsRDw7mXlVbT+RMaZTlEPo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aGVJ8H4e; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aGVJ8H4e" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4D999C4CEE3; Tue, 18 Mar 2025 13:48:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1742305693; bh=h/EuhGrH0PIQblMJgGKwYrojTphVCdZ+DS9FajtTK/o=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=aGVJ8H4eqGtWzU6rQzAtvfqUsTjh4lv77fo5l2NBSwR1kSwW/KepWysyw3XToPsbw 1ZApMvomMMZ+L4BsXq0UYa1xyqTfnoA/7WlVimuRxTH2CVhSgzJFVYUwJAyctcYqep xNQCQAGBq+3hkiBEE1PFSBAfybtk8DwBiAyqHXbQvGPmS3r0QWmU9iBZAXrjik7fzI 1oZWGkJcf6fKV0TjeRaqG7rzYWHMMOvAkAwNwAwpfcKox74Inii5u0CgOFKkik29Yu nxXKQJAQeEuuy5KnA0jGz7A/CA/bs4QYCfng5xX+lQ43cGBHhLyFP/7PtEriWWzhpK NWHaDRd2tvtKw== Message-ID: Date: Tue, 18 Mar 2025 14:48:05 +0100 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] regulator: s5m8767: Convert to GPIO descriptors To: Peng Fan , Andy Shevchenko , "Peng Fan (OSS)" Cc: "lgirdwood@gmail.com" , "broonie@kernel.org" , "linus.walleij@linaro.org" , "brgl@bgdev.pl" , "linux-kernel@vger.kernel.org" , "linux-samsung-soc@vger.kernel.org" , "linux-gpio@vger.kernel.org" References: <20250318052709.1731747-1-peng.fan@oss.nxp.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 18/03/2025 13:38, Peng Fan wrote: >> Also the commit message doesn't tell anything about the existing DTS >> files. >> Do we have this device described in any in the kernel? Do we have any >> googled examples? Why I'm asking because often the issue is the >> incorrect setting of the polarity, which needs to be carefully checked, >> esp. for the voltage regulators case. > > > Under arch/arm/boot/dts/samsung/, a few dtsi files have the property > with results from output of > `grep "s5m8767" ./arch/arm/boot/dts/samsung/ -rn | grep gpios` > > Exynos5250-spring.dts uses GPIO_ACTIVE_LOW. > Others use GPIO_ACTIVE_HIGH. > These are old devices and not many people are actually providing tests, so you need to preserve existing ABI. IOW, if previously GPIO flags were ignored, meaning "1" is ACTIVE_HIGH, then you must preserve this behavior. Best regards, Krzysztof