From patchwork Sat Mar 5 21:58:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Geis X-Patchwork-Id: 548687 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 5A2E3C433F5 for ; Sat, 5 Mar 2022 21:58:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232689AbiCEV7e (ORCPT ); Sat, 5 Mar 2022 16:59:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49746 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229832AbiCEV7d (ORCPT ); Sat, 5 Mar 2022 16:59:33 -0500 Received: from mail-qt1-x82a.google.com (mail-qt1-x82a.google.com [IPv6:2607:f8b0:4864:20::82a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA8103DA7E; Sat, 5 Mar 2022 13:58:42 -0800 (PST) Received: by mail-qt1-x82a.google.com with SMTP id t28so10331191qtc.7; Sat, 05 Mar 2022 13:58:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ct38wuS+j+KdARYVXEvHL+p/0EBV034tSVqTgQxYy/U=; b=lfUc/RQ3J+tTlsfPuOC/ab+OMU3mVuCcB4s7Px11WkslxfatjJrSn+avZ0CETKOM4R vNcCBnebj/girjqxQHd2H7h/tRv4gi/WDxgWoOE2cRfANKVz4wMIedKVBahV9olXt6el +U35guGBBVNvrmS31BjkHkM9yz/sK1Nm1S12Ofj/GvMRGj0Jl/IpIvKA538nMQT1Pck0 hnxIPQcnwSQJJVu4FpAILCgmcV5XAwq7Sa1BTyJeFbA6K6MlzJiq6oZYhXJwuk+10Qc+ RnefUeOYfO0P/mWNTAIDXnj5GmFZY5LWYUYNJPe2ZKVwoS0tSwza07qTjo4WX4hiooIV v33g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ct38wuS+j+KdARYVXEvHL+p/0EBV034tSVqTgQxYy/U=; b=sc3p3aiK7TJhgePjiP/vBj7mQ9hexUVTiXjqk91kLNR6XoehV38W3c7BoHZIVqX1xk 2kEv5MuHjkbBN5qu31URGkwR5p3CNi5jg8y8hM4H+3uJxB1uB9VqTRDZOqrivHD8Cu1l vEneAKAVxsQZaIo0IFj+cYbt0jAjdvu/XXYGjTZQOwL0+iP0AUVCW6HMfMXCUczprWjg eru9dndtMVxliKG3lYLDjvaQyOdt+CgNhP7ry4end7zKCdbWvCCE1NRtKfgfuHwFN9SR XnY8nF2OhtJRhJfdIsNDYxnPhK8KJcqibpsaByG4oauwHGL1MQ/e8K1ksSeM5QmiNcIo hNrA== X-Gm-Message-State: AOAM533FbrymLKHl99F86SQITrkkDEUJxiyazvUXuN9nKN0xUTNpcnDI xmwsSWABOdSIXh2idzIRMbI= X-Google-Smtp-Source: ABdhPJwkcUtvAR6twCDRCalsZKvOr+O+o9namgpdwUWCoHGmZOsKiCUtUVyLUEgi2B5e9H2Y49ftCA== X-Received: by 2002:a05:622a:1809:b0:2de:6f5c:23ed with SMTP id t9-20020a05622a180900b002de6f5c23edmr4224001qtc.406.1646517521810; Sat, 05 Mar 2022 13:58:41 -0800 (PST) Received: from master-x64.sparksnet ([2601:153:980:85b1::10]) by smtp.gmail.com with ESMTPSA id h188-20020a376cc5000000b00648d7e2a36bsm4230067qkc.117.2022.03.05.13.58.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Mar 2022 13:58:41 -0800 (PST) From: Peter Geis To: Jaehoon Chung , Ulf Hansson Cc: robin.murphy@arm.com, linux-rockchip@lists.infradead.org, Peter Geis , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/2] mmc: host: dw_mmc: support setting f_min from host drivers Date: Sat, 5 Mar 2022 16:58:34 -0500 Message-Id: <20220305215835.2210388-2-pgwipeout@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220305215835.2210388-1-pgwipeout@gmail.com> References: <20220305215835.2210388-1-pgwipeout@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Host drivers may not be able to support frequencies as low as dw-mmc supports. Unfortunately f_min isn't available when the drv_data->init function is called, as the mmc_host struct hasn't been set up yet. Support the host drivers saving the requested minimum frequency, so we can later set f_min when it is available. Signed-off-by: Peter Geis --- drivers/mmc/host/dw_mmc.c | 7 ++++++- drivers/mmc/host/dw_mmc.h | 2 ++ 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 42bf8a2287ba..0d90d0201759 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -2898,7 +2898,12 @@ static int dw_mci_init_slot_caps(struct dw_mci_slot *slot) if (host->pdata->caps2) mmc->caps2 = host->pdata->caps2; - mmc->f_min = DW_MCI_FREQ_MIN; + /* if host has set a minimum_freq, we should respect it */ + if (host->minimum_speed) + mmc->f_min = host->minimum_speed; + else + mmc->f_min = DW_MCI_FREQ_MIN; + if (!mmc->f_max) mmc->f_max = DW_MCI_FREQ_MAX; diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index 7f1e38621d13..4ed81f94f7ca 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -99,6 +99,7 @@ struct dw_mci_dma_slave { * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus * rate and timeout calculations. * @current_speed: Configured rate of the controller. + * @minimum_speed: Stored minimum rate of the controller. * @fifoth_val: The value of FIFOTH register. * @verid: Denote Version ID. * @dev: Device associated with the MMC controller. @@ -201,6 +202,7 @@ struct dw_mci { u32 bus_hz; u32 current_speed; + u32 minimum_speed; u32 fifoth_val; u16 verid; struct device *dev;