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 X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6AC9CC4727C for ; Tue, 22 Sep 2020 04:50:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1F88921548 for ; Tue, 22 Sep 2020 04:50:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="RiTS5V2I" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728575AbgIVEt7 (ORCPT ); Tue, 22 Sep 2020 00:49:59 -0400 Received: from m42-4.mailgun.net ([69.72.42.4]:44446 "EHLO m42-4.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727124AbgIVEt7 (ORCPT ); Tue, 22 Sep 2020 00:49:59 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1600750198; h=Content-Transfer-Encoding: Content-Type: In-Reply-To: MIME-Version: Date: Message-ID: From: References: Cc: To: Subject: Sender; bh=R4faDtMAAlvcimRCoxb6A2gPBHPAB4+jpEJWGiQPGgE=; b=RiTS5V2I6sRBSL85DVnIRrkAF++aXqCXBUSAr6q24046yatvjogvvg8wtEREtuAMldX8mpDw N/u7/ULx9XI9AfI+pz+Ze5sMj6oPlo4XzwwjQrQKwb2Y07xRD62QrznHiE/MQubkY1d8pRGF VpcdE3XuAnbz/M2DtGGLwU2IVDU= X-Mailgun-Sending-Ip: 69.72.42.4 X-Mailgun-Sid: WyI1YmJiNiIsICJkZXZpY2V0cmVlQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n07.prod.us-east-1.postgun.com with SMTP id 5f6982760915d30357491bf0 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 22 Sep 2020 04:49:58 GMT Sender: akashast=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 9607FC433C8; Tue, 22 Sep 2020 04:49:57 +0000 (UTC) Received: from [192.168.1.101] (unknown [47.8.232.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: akashast) by smtp.codeaurora.org (Postfix) with ESMTPSA id 88CB1C433C8; Tue, 22 Sep 2020 04:49:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 88CB1C433C8 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=akashast@codeaurora.org Subject: Re: [PATCH v3 2/2] arm64: dts: qcom: Switch sc7180-trogdor to control SPI CS via GPIO To: Douglas Anderson , Andy Gross , Bjorn Andersson Cc: linux-arm-msm@vger.kernel.org, swboyd@chromium.org, Rob Herring , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20200921142655.v3.1.I997a428f58ef9d48b37a27a028360f34e66c00ec@changeid> <20200921142655.v3.2.I3c57d8b6d83d5bdad73a413eea1e249a98d11973@changeid> From: Akash Asthana Message-ID: <8942f1b9-9ebf-992b-1e43-45fe9adedce9@codeaurora.org> Date: Tue, 22 Sep 2020 10:19:40 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <20200921142655.v3.2.I3c57d8b6d83d5bdad73a413eea1e249a98d11973@changeid> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 9/22/2020 2:57 AM, Douglas Anderson wrote: > As talked about in the patch ("arm64: dts: qcom: sc7180: Provide > pinconf for SPI to use GPIO for CS"), on some boards it makes much > more sense (and is much more efficient) to think of the SPI Chip > Select as a GPIO. Trogdor is one such board where the SPI parts don't > run in GSI mode and we do a lot of SPI traffic. > > Signed-off-by: Douglas Anderson > Reviewed-by: Stephen Boyd Reviewed-by: Akash Asthana -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project