From: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Date: Mon, 6 Jul 2015 11:53:38 +0000 (+0300)
Subject: mmc: sdhci-msm: Boost controller core clock
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=951b8c875ac905aa9d348c825c380e7ce66c0f62;p=deliverable%2Flinux.git

mmc: sdhci-msm: Boost controller core clock

Ensure SDCC is working with maximum clock otherwise card
detection could be extremely slow, up to 7 seconds.

Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Reviewed-by: Georgi Djakov <georgi.djakov@linaro.org>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 4a09f7608c66..4bcee033feda 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 failed\n");
+
 	ret = clk_prepare_enable(msm_host->clk);
 	if (ret)
 		goto pclk_disable;