From mboxrd@z Thu Jan 1 00:00:00 1970 From: Georgi Djakov Subject: Re: [PATCH] mmc: sdhci: msm: Boost controller core clock Date: Fri, 26 Jun 2015 14:34:55 +0300 Message-ID: <558D38DF.1080201@linaro.org> References: <1435317417-369-1-git-send-email-ivan.ivanov@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1435317417-369-1-git-send-email-ivan.ivanov@linaro.org> Sender: linux-mmc-owner@vger.kernel.org To: "Ivan T. Ivanov" , Ulf Hansson Cc: Stephen Boyd , Peter Griffin , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org List-Id: linux-arm-msm@vger.kernel.org On 06/26/2015 02:16 PM, Ivan T. Ivanov wrote: > Ensure SDCC is working with maximum clock otherwise card > detection could be extremely slow, up to 7 seconds. > > Signed-off-by: Ivan T. Ivanov > --- > drivers/mmc/host/sdhci-msm.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c > index 4a09f76..b2556bc 100644 > --- a/drivers/mmc/host/sdhci-msm.c > +++ b/drivers/mmc/host/sdhci-msm.c > @@ -489,6 +489,11 @@ static int sdhci_msm_probe(struct platform_device *pdev) > goto pclk_disable; > } > > + /* Vote for maximum clock rate for maximum performance */ > + ret = clk_set_rate(msm_host->clk, INT_MAX); > + if (ret) > + dev_warn(&pdev->dev, "core clock boost falied\n"); failed? Otherwise looks good to me. > + > ret = clk_prepare_enable(msm_host->clk); > if (ret) > goto pclk_disable; > -- > 1.9.1 >