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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 33DD9C02198 for ; Fri, 14 Feb 2025 06:43:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=6hfDJLR9yNuRN5GPzA8PeCgTr8s7BG7gSfHQ0NUvCN8=; b=ZMAvnUXjr8QAbbYKit7BXIDZpK qwTel8+uA5/2Csstgh8/z8OmAhCtAs3XN29VpTXnO+mrRDf+mWcfyb1MRep8TcL0jcZgUPOW5u5ke BFyiix5PMFotcUcRTrq7OPlj/N2nX3qrvHk2FY0G5OiWDPkXYd1TTxyepS+0tpu7DR3+syhvW/Efe UTRTSd0Xw03XgPop0xoFvomL/9Js93clk52ocKOodhCzmg29spJnEvjIWfsYWz6EsZDANcJNULonr LZqzcBUEBpvIW/h9vlFdWTO2GwbRE5//3swRkK3Qa22oXTM/RN3LeNoicGCLsbzSXDuuc+QxOA9HI XLG/USKw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tipQR-0000000DrDW-0VSy; Fri, 14 Feb 2025 06:43:47 +0000 Received: from mail-ej1-x634.google.com ([2a00:1450:4864:20::634]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tipP0-0000000Dr1f-1b1t for linux-arm-kernel@lists.infradead.org; Fri, 14 Feb 2025 06:42:19 +0000 Received: by mail-ej1-x634.google.com with SMTP id a640c23a62f3a-ab7f2b3d563so316567066b.1 for ; Thu, 13 Feb 2025 22:42:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1739515337; x=1740120137; darn=lists.infradead.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=6hfDJLR9yNuRN5GPzA8PeCgTr8s7BG7gSfHQ0NUvCN8=; b=pi0GtKO5VmBaUx1sQs1/yShT1+JBEC+O3v4b3LOzkd6fZjC9kW72fax43O0kgnyFRU ZOxZcelaLQK9k0/mXd6Ww6Vtbed/gn19LZ14S5i+dq5EFGwjCIqeC8y3IcvzSMjsyhsU L4HWmWy7AS4GOaSlGXspRG+JLmDg84VaXFrZIaQTXVk8ZNb1pLhEOCZTevO+VEOOmQhd WKHrAhmDVjBA5gU5/D2EN9eUXPFUBSO4mZ5L70utrFR/KI1ypk+ewhYlXObroa2lKNd/ uvCcF8ld4OGTXVGjVpvQf0T/XnuAD86Pdhj78rxIw56OsS06Prv6JUK0UwmDS1Zt5i9A gY6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739515337; x=1740120137; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=6hfDJLR9yNuRN5GPzA8PeCgTr8s7BG7gSfHQ0NUvCN8=; b=p+/F4cUWMR++UJd6L+6NNtIizCftnSoCjQRVZicC9I063LhmL8RuG2jGZqMT+7LzmS omHNbQQDsE2Jgkxur/WY+cgDgi2sNGXyZsJEmdqwVhIGduzGsbN8po1wwPpZCFL7UG5p sXnB2FWZX2yhyw8Q7tAMGDm5A6E/oXDfAaZwqW8lfxvF7DgB0dY+26FZzpk+WROYU3Xb jf7zXZn5OIQDOd8Z+XWNcGlPhug+mwiHsKPK363EdQY0gAL1dmfhZEqGLE6k/duPGxjE TznvLEfmj+/zPOUJSvNA8oJxGEMkzv/wZxMozOj3wZUzbAfLTHFJb5aH1CgO4Tf3XBy1 r6RQ== X-Forwarded-Encrypted: i=1; AJvYcCV+LemC1IHT2mjRAbaqk2sOAqiu57V9LtLCZByCFznczLuyTX4GTY+vrT6ZD5p3oUuptpx+JW3B16Wg4LTzNJc5@lists.infradead.org X-Gm-Message-State: AOJu0YzojGzZZTBdD/+hfz579BA+r5ivyqJXdEgeZTQKW2AKJEGjeo/N pENjGG/4TWRq+1i1SLJrenTiTfjrKOjFgE+7NoQCPBcDU19verPDFySx/5YOoK0= X-Gm-Gg: ASbGncuSQh0hDsuUTj0JJzBYFwT9s5eayTMdVBWfcROSGj8EoZJNBoFNUKXHX5ehok9 FxQ7l18Yz1y7zBdLCfoolUgVopApnzFmcKC5MfXpvqBmVN98yBmgF8vdVltQiZu8RA3xsnuPdp2 0nBS5fBE/BxUwn3sgzFhENBimz/rYadu/Y1/se4PouQKJiTChu8lmSiktvQBMR12a7Kgutf2ESW Ix42btfl2UiZwKgJ0iEPFWU89XMdXTKd9Ld9X8fDFx7hwmNa6qoZ3bl7wvvh1vysfayyAXG9ujc vmcAeQAW+YWl/AbUYJMFejyE X-Google-Smtp-Source: AGHT+IEKcusDJ5ysfHl3uoOwCsLd2p8Ws/FHvKfkzEK57YdhmOYKIadpK1QRFMVRV3ZXNrzmUuWp+Q== X-Received: by 2002:a17:907:d15:b0:aa6:9503:aa73 with SMTP id a640c23a62f3a-aba501bc5admr629562966b.51.1739515336656; Thu, 13 Feb 2025 22:42:16 -0800 (PST) Received: from [192.168.0.14] ([79.115.63.124]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aba532832d1sm275659666b.81.2025.02.13.22.42.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 13 Feb 2025 22:42:16 -0800 (PST) Message-ID: <55028ae3-ffab-41e8-b1ec-fb2098b65d7c@linaro.org> Date: Fri, 14 Feb 2025 06:42:14 +0000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 2/3] dt-bindings: serial: samsung: add Exynos990 compatible To: Denzeel Oliva Cc: alim.akhtar@samsung.com, conor+dt@kernel.org, devicetree@vger.kernel.org, gregkh@linuxfoundation.org, jirislaby@kernel.org, krzk+dt@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-serial@vger.kernel.org, robh@kernel.org, semen.protsenko@linaro.org References: <20250212234034.284-1-wachiturroxd150@gmail.com> <20250212234034.284-3-wachiturroxd150@gmail.com> Content-Language: en-US From: Tudor Ambarus In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250213_224218_426428_C744AE9B X-CRM114-Status: GOOD ( 10.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2/14/25 5:16 AM, Denzeel Oliva wrote: > On Thu, Feb 13, 2025 at 07:20:22AM +0000, Tudor Ambarus wrote: >> doesn't the 32 bit register restriction apply to uart as it applies to >> SPI? If so, you shall probably fallback to gs101. > > Of course not, downstream of the UART serial driver there is nothing > specified about 32-bit access restriction, nothing explicitly > in the driver. [0] > > https://github.com/pascua28/android_kernel_samsung_s20fe/blob/3be539e9cd22b89ba3cc8282945a0c46ff27341d/drivers/tty/serial/samsung.c#L1543 that's very strange. uart and spi are part of the same USI IP, on the same bus. I don't think you can have the same IP requiring 32 bit accesses for SPI but allow 8-bit accesses for uart. Maybe SPI can work with 8bit accesses? How did you test SPI and uart?