From patchwork Mon Nov 6 10:40:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenchao Chen X-Patchwork-Id: 13446574 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 70AB1C4332F for ; Mon, 6 Nov 2023 10:40:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229583AbjKFKk7 (ORCPT ); Mon, 6 Nov 2023 05:40:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59914 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229874AbjKFKk7 (ORCPT ); Mon, 6 Nov 2023 05:40:59 -0500 Received: from SHSQR01.spreadtrum.com (unknown [222.66.158.135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 11134FA; Mon, 6 Nov 2023 02:40:53 -0800 (PST) Received: from dlp.unisoc.com ([10.29.3.86]) by SHSQR01.spreadtrum.com with ESMTP id 3A6AeZRI049532; Mon, 6 Nov 2023 18:40:35 +0800 (+08) (envelope-from Wenchao.Chen@unisoc.com) Received: from SHDLP.spreadtrum.com (shmbx05.spreadtrum.com [10.29.1.56]) by dlp.unisoc.com (SkyGuard) with ESMTPS id 4SP76T0Zynz2M0tVJ; Mon, 6 Nov 2023 18:35:45 +0800 (CST) Received: from xm9614pcu.spreadtrum.com (10.13.2.29) by shmbx05.spreadtrum.com (10.29.1.56) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Mon, 6 Nov 2023 18:40:33 +0800 From: Wenchao Chen To: , , , CC: , , , , , Wenchao Chen Subject: [PATCH] mmc: sdhci-sprd: Fix the clock switch Date: Mon, 6 Nov 2023 18:40:18 +0800 Message-ID: <20231106104018.29179-1-wenchao.chen@unisoc.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.13.2.29] X-ClientProxiedBy: SHCAS03.spreadtrum.com (10.0.1.207) To shmbx05.spreadtrum.com (10.29.1.56) X-MAIL: SHSQR01.spreadtrum.com 3A6AeZRI049532 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Some SOCs have a "1x_enable" clock that needs to be turned on and off in probe, remove and runtime pm. Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Signed-off-by: Wenchao Chen --- drivers/mmc/host/sdhci-sprd.c | 29 +++++++++++++++++++++++++---- 1 file changed, 25 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c index 6b84ba27e6ab..3367f924dc5b 100644 --- a/drivers/mmc/host/sdhci-sprd.c +++ b/drivers/mmc/host/sdhci-sprd.c @@ -83,6 +83,7 @@ struct sdhci_sprd_host { u32 version; struct clk *clk_sdio; struct clk *clk_enable; + struct clk *clk_1x_enable; struct clk *clk_2x_enable; struct pinctrl *pinctrl; struct pinctrl_state *pins_uhs; @@ -784,6 +785,10 @@ static int sdhci_sprd_probe(struct platform_device *pdev) } sprd_host->clk_enable = clk; + clk = devm_clk_get(&pdev->dev, "1x_enable"); + if (!IS_ERR(clk)) + sprd_host->clk_1x_enable = clk; + clk = devm_clk_get(&pdev->dev, "2x_enable"); if (!IS_ERR(clk)) sprd_host->clk_2x_enable = clk; @@ -793,12 +798,16 @@ static int sdhci_sprd_probe(struct platform_device *pdev) goto pltfm_free; ret = clk_prepare_enable(sprd_host->clk_enable); + if (ret) + goto clk_sdio_disable; + + ret = clk_prepare_enable(sprd_host->clk_1x_enable); if (ret) goto clk_disable; ret = clk_prepare_enable(sprd_host->clk_2x_enable); if (ret) - goto clk_disable2; + goto clk_1x_disable; sdhci_sprd_init_config(host); host->version = sdhci_readw(host, SDHCI_HOST_VERSION); @@ -858,10 +867,13 @@ static int sdhci_sprd_probe(struct platform_device *pdev) clk_disable_unprepare(sprd_host->clk_2x_enable); -clk_disable2: - clk_disable_unprepare(sprd_host->clk_enable); +clk_1x_disable: + clk_disable_unprepare(sprd_host->clk_1x_enable); clk_disable: + clk_disable_unprepare(sprd_host->clk_enable); + +clk_sdio_disable: clk_disable_unprepare(sprd_host->clk_sdio); pltfm_free: @@ -878,6 +890,7 @@ static void sdhci_sprd_remove(struct platform_device *pdev) clk_disable_unprepare(sprd_host->clk_sdio); clk_disable_unprepare(sprd_host->clk_enable); + clk_disable_unprepare(sprd_host->clk_1x_enable); clk_disable_unprepare(sprd_host->clk_2x_enable); sdhci_pltfm_free(pdev); @@ -900,6 +913,7 @@ static int sdhci_sprd_runtime_suspend(struct device *dev) clk_disable_unprepare(sprd_host->clk_sdio); clk_disable_unprepare(sprd_host->clk_enable); + clk_disable_unprepare(sprd_host->clk_1x_enable); clk_disable_unprepare(sprd_host->clk_2x_enable); return 0; @@ -915,10 +929,14 @@ static int sdhci_sprd_runtime_resume(struct device *dev) if (ret) return ret; - ret = clk_prepare_enable(sprd_host->clk_enable); + ret = clk_prepare_enable(sprd_host->clk_1x_enable); if (ret) goto clk_2x_disable; + ret = clk_prepare_enable(sprd_host->clk_enable); + if (ret) + goto clk_1x_disable; + ret = clk_prepare_enable(sprd_host->clk_sdio); if (ret) goto clk_disable; @@ -931,6 +949,9 @@ static int sdhci_sprd_runtime_resume(struct device *dev) clk_disable: clk_disable_unprepare(sprd_host->clk_enable); +clk_1x_disable: + clk_disable_unprepare(sprd_host->clk_1x_enable); + clk_2x_disable: clk_disable_unprepare(sprd_host->clk_2x_enable);