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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BCFCEC433EF for ; Fri, 22 Apr 2022 17:25:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231312AbiDVR2L (ORCPT ); Fri, 22 Apr 2022 13:28:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47644 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231422AbiDVR2H (ORCPT ); Fri, 22 Apr 2022 13:28:07 -0400 Received: from mail-oi1-x22a.google.com (mail-oi1-x22a.google.com [IPv6:2607:f8b0:4864:20::22a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 449356174; Fri, 22 Apr 2022 10:25:07 -0700 (PDT) Received: by mail-oi1-x22a.google.com with SMTP id z2so9764784oic.6; Fri, 22 Apr 2022 10:25:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :cc:references:from:in-reply-to:content-transfer-encoding; bh=lexdz5hngsBhmPhxr+sTw6q5KgJQRlPt5Z2EPIdm99Y=; b=Zungingls9hmWdfS+naDCyI78V9iY7Kxhf998yiIEnbKfvh65fB5UCRIm2ZmWkr8w2 T1Dhsg8BkQoXpFnY4x/6vNroeCzYECnLuVeRWFTVf/ejjUMReASMLojXMqRFB3Mf/OVx du6rJG+6BgML4bBFVVLuFhc8Hd3Rh3sXRLqkrouyoMYJNqwTDWdVGqmX1uPguJNvkRF7 li3P65TV6/0FVU4Q9SkA7FVKpsQQwAGVpczon4b77QPX4wge/3YAoTI8ZH+vP05XiFqy jbqy0gdDKI8G0WCIL07AmY44NViEOwuDm7xkxsKIzo5/SDUENVATCrdHgX93ldB4sOnO E5Ww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=lexdz5hngsBhmPhxr+sTw6q5KgJQRlPt5Z2EPIdm99Y=; b=2Yx47Xg7nYEe3ymhxfhv+UZUkuYhswzz9iVhIMiCHXATGuCgOZMLXk3JZ6+9AIlzh9 dF9TTGxR1jNbqrikBSZDtGfNVjvXI0LM/dGVJwYYHYATDa5EE8wtqokxNWb/XwYi8lOR AeUBKJIDwZgsMSo7SGWlueOIxmE8e43s+IjIHNLOyH/tn29xdBl3PTocNB9g3VNRq63Y 6exeFCveKkQA4QhrZpgfbzVUdrVp0cMKGjxeom3EP+3foeVxtQQtoR7/756czd/xPjC6 FW6I+z6ai/E0cRSdGq07mVoN+A3yHwfzr8cVRiZHwujUtD2DHrVMnx3CgDNQ87zP6hvY oJlw== X-Gm-Message-State: AOAM532z+tN55npXU6/uv9XmP2ChAmrUvPqBl2YX2le5JUTGruT6w5BF G+8vjgaeFLzJiwOXrAbRDufw8mXfZ+Q= X-Google-Smtp-Source: ABdhPJxMDJKIgmMcJcU/zvtD4vcC/XckcDFIRR7sN1EmVmwCkp085QTP+g0ejuORKvaEYxobPEHqNA== X-Received: by 2002:a17:90a:a82:b0:1c9:ef95:486 with SMTP id 2-20020a17090a0a8200b001c9ef950486mr17219039pjw.93.1650647702829; Fri, 22 Apr 2022 10:15:02 -0700 (PDT) Received: from [10.67.48.245] ([192.19.223.252]) by smtp.googlemail.com with ESMTPSA id d21-20020a056a0010d500b004fd9ee64134sm3166611pfu.74.2022.04.22.10.15.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 22 Apr 2022 10:15:02 -0700 (PDT) Message-ID: <39f813e9-13d8-db15-1fcb-a93b27e46798@gmail.com> Date: Fri, 22 Apr 2022 10:14:58 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [PATCH 3/5] mmc: sdhci-brcmstb: Enable Clock Gating to save power Content-Language: en-US To: Kamal Dasu , ulf.hansson@linaro.org, robh+dt@kernel.org, krzk+dt@kernel.org, alcooperx@gmail.com Cc: f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, adrian.hunter@intel.com, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org References: <20220421182803.6495-1-kdasu.kdev@gmail.com> <20220421182803.6495-4-kdasu.kdev@gmail.com> From: Florian Fainelli In-Reply-To: <20220421182803.6495-4-kdasu.kdev@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 4/21/22 11:28, Kamal Dasu wrote: > From: Al Cooper > > Enabling this feature will allow the controller to stop the bus > clock when the bus is idle. The feature is not part of the standard > and is unique to newer Arasan cores and is enabled with a bit in a > vendor specific register. This feature will only be enabled for > non-removable devices because they don't switch the voltage and > clock gating breaks SD Card volatge switching. > > Signed-off-by: Al Cooper > Signed-off-by: Kamal Dasu Acked-by: Florian Fainelli -- Florian