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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hXlyY-00047w-IH; Mon, 03 Jun 2019 12:22:06 +0000 Received: from mga11.intel.com ([192.55.52.93]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hXlyW-00047b-7H for linux-arm-kernel@lists.infradead.org; Mon, 03 Jun 2019 12:22:05 +0000 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Jun 2019 05:22:03 -0700 X-ExtLoop1: 1 Received: from ahunter-desktop.fi.intel.com (HELO [10.237.72.198]) ([10.237.72.198]) by orsmga005.jf.intel.com with ESMTP; 03 Jun 2019 05:21:59 -0700 Subject: Re: [PATCH 3/9] mmc: sdhci-sprd: Add optional gate clock support To: Baolin Wang , ulf.hansson@linaro.org, zhang.lyra@gmail.com, orsonzhai@gmail.com, robh+dt@kernel.org, mark.rutland@arm.com, arnd@arndb.de, olof@lixom.net References: <16b895cf30c235dc656eeed5888069b6266ab5f8.1558346019.git.baolin.wang@linaro.org> From: Adrian Hunter Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Message-ID: <2969091b-408d-c505-d406-ce4b4f0679e0@intel.com> Date: Mon, 3 Jun 2019 15:20:48 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <16b895cf30c235dc656eeed5888069b6266ab5f8.1558346019.git.baolin.wang@linaro.org> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190603_052204_273542_5D333D23 X-CRM114-Status: GOOD ( 21.13 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, arm@kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 20/05/19 1:11 PM, Baolin Wang wrote: > For the Spreadtrum SC9860 platform, we should enable another gate clock > '2x_enable' to make the SD host controller work well. > > Signed-off-by: Baolin Wang Acked-by: Adrian Hunter > --- > drivers/mmc/host/sdhci-sprd.c | 35 +++++++++++++++++++++++++++++------ > 1 file changed, 29 insertions(+), 6 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c > index e741491..31ba7d6 100644 > --- a/drivers/mmc/host/sdhci-sprd.c > +++ b/drivers/mmc/host/sdhci-sprd.c > @@ -60,6 +60,7 @@ struct sdhci_sprd_host { > u32 version; > struct clk *clk_sdio; > struct clk *clk_enable; > + struct clk *clk_2x_enable; > u32 base_rate; > int flags; /* backup of host attribute */ > }; > @@ -364,6 +365,10 @@ static int sdhci_sprd_probe(struct platform_device *pdev) > } > sprd_host->clk_enable = clk; > > + clk = devm_clk_get(&pdev->dev, "2x_enable"); > + if (!IS_ERR(clk)) > + sprd_host->clk_2x_enable = clk; > + > ret = clk_prepare_enable(sprd_host->clk_sdio); > if (ret) > goto pltfm_free; > @@ -372,6 +377,10 @@ static int sdhci_sprd_probe(struct platform_device *pdev) > if (ret) > goto clk_disable; > > + ret = clk_prepare_enable(sprd_host->clk_2x_enable); > + if (ret) > + goto clk_disable2; > + > sdhci_sprd_init_config(host); > host->version = sdhci_readw(host, SDHCI_HOST_VERSION); > sprd_host->version = ((host->version & SDHCI_VENDOR_VER_MASK) >> > @@ -408,6 +417,9 @@ static int sdhci_sprd_probe(struct platform_device *pdev) > pm_runtime_disable(&pdev->dev); > pm_runtime_set_suspended(&pdev->dev); > > + clk_disable_unprepare(sprd_host->clk_2x_enable); > + > +clk_disable2: > clk_disable_unprepare(sprd_host->clk_enable); > > clk_disable: > @@ -427,6 +439,7 @@ static int sdhci_sprd_remove(struct platform_device *pdev) > mmc_remove_host(mmc); > clk_disable_unprepare(sprd_host->clk_sdio); > clk_disable_unprepare(sprd_host->clk_enable); > + clk_disable_unprepare(sprd_host->clk_2x_enable); > > mmc_free_host(mmc); > > @@ -449,6 +462,7 @@ 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_2x_enable); > > return 0; > } > @@ -459,19 +473,28 @@ static int sdhci_sprd_runtime_resume(struct device *dev) > struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host); > int ret; > > - ret = clk_prepare_enable(sprd_host->clk_enable); > + ret = clk_prepare_enable(sprd_host->clk_2x_enable); > if (ret) > return ret; > > + ret = clk_prepare_enable(sprd_host->clk_enable); > + if (ret) > + goto clk_2x_disable; > + > ret = clk_prepare_enable(sprd_host->clk_sdio); > - if (ret) { > - clk_disable_unprepare(sprd_host->clk_enable); > - return ret; > - } > + if (ret) > + goto clk_disable; > > sdhci_runtime_resume_host(host); > - > return 0; > + > +clk_disable: > + clk_disable_unprepare(sprd_host->clk_enable); > + > +clk_2x_disable: > + clk_disable_unprepare(sprd_host->clk_2x_enable); > + > + return ret; > } > #endif > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel