From patchwork Fri Nov 11 08:10:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kunihiko Hayashi X-Patchwork-Id: 624127 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 AF0E7C4321E for ; Fri, 11 Nov 2022 08:10:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233083AbiKKIKl (ORCPT ); Fri, 11 Nov 2022 03:10:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42402 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232851AbiKKIKj (ORCPT ); Fri, 11 Nov 2022 03:10:39 -0500 Received: from mx.socionext.com (mx.socionext.com [202.248.49.38]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 93E2865877; Fri, 11 Nov 2022 00:10:38 -0800 (PST) Received: from unknown (HELO kinkan2-ex.css.socionext.com) ([172.31.9.52]) by mx.socionext.com with ESMTP; 11 Nov 2022 17:10:38 +0900 Received: from mail.mfilter.local (m-filter-2 [10.213.24.62]) by kinkan2-ex.css.socionext.com (Postfix) with ESMTP id E3FEB2059027; Fri, 11 Nov 2022 17:10:37 +0900 (JST) Received: from 172.31.9.51 (172.31.9.51) by m-FILTER with ESMTP; Fri, 11 Nov 2022 17:10:37 +0900 Received: from plum.e01.socionext.com (unknown [10.212.243.119]) by kinkan2.css.socionext.com (Postfix) with ESMTP id 958FCB62A4; Fri, 11 Nov 2022 17:10:37 +0900 (JST) From: Kunihiko Hayashi To: Ulf Hansson , Adrian Hunter , Rob Herring , Krzysztof Kozlowski Cc: Jassi Brar , Ard Biesheuvel , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Kunihiko Hayashi Subject: [PATCH v2 2/6] mmc: f-sdh30: Add reset control support Date: Fri, 11 Nov 2022 17:10:29 +0900 Message-Id: <20221111081033.3813-3-hayashi.kunihiko@socionext.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221111081033.3813-1-hayashi.kunihiko@socionext.com> References: <20221111081033.3813-1-hayashi.kunihiko@socionext.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Add reset control support for F_SDH30 controller. This is optional. Signed-off-by: Kunihiko Hayashi Acked-by: Jassi Brar --- drivers/mmc/host/sdhci_f_sdh30.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci_f_sdh30.c b/drivers/mmc/host/sdhci_f_sdh30.c index 3f5977979cf2..7f4553b28180 100644 --- a/drivers/mmc/host/sdhci_f_sdh30.c +++ b/drivers/mmc/host/sdhci_f_sdh30.c @@ -14,6 +14,7 @@ #include #include #include +#include #include "sdhci-pltfm.h" #include "sdhci_f_sdh30.h" @@ -21,6 +22,7 @@ struct f_sdhost_priv { struct clk *clk_iface; struct clk *clk; + struct reset_control *rst; u32 vendor_hs200; struct device *dev; bool enable_cmd_dat_delay; @@ -150,6 +152,16 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev) ret = clk_prepare_enable(priv->clk); if (ret) goto err_clk; + + priv->rst = devm_reset_control_get_optional_shared(dev, NULL); + if (IS_ERR(priv->rst)) { + ret = PTR_ERR(priv->rst); + goto err_rst; + } + + ret = reset_control_deassert(priv->rst); + if (ret) + goto err_rst; } /* init vendor specific regs */ @@ -175,6 +187,8 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev) return 0; err_add_host: + reset_control_assert(priv->rst); +err_rst: clk_disable_unprepare(priv->clk); err_clk: clk_disable_unprepare(priv->clk_iface); @@ -191,8 +205,9 @@ static int sdhci_f_sdh30_remove(struct platform_device *pdev) sdhci_remove_host(host, readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff); - clk_disable_unprepare(priv->clk_iface); + reset_control_assert(priv->rst); clk_disable_unprepare(priv->clk); + clk_disable_unprepare(priv->clk_iface); sdhci_free_host(host); platform_set_drvdata(pdev, NULL);