[PATCH v2] mmc: sdhci-msm: Boost controller core clock

[Ivan T. Ivanov]

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@xxxxxxxxxx>
Reviewed-by: Georgi Djakov <georgi.djakov@xxxxxxxxxx>
Acked-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
---

Changes since v0:
- s/falied/failed in warning message.

 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..4bcee03 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;
--
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/