The mmc_delay() is a wrapper function for mdelay() and msleep().
o mdelay() -- block the system when busy-waiting.
o msleep() -- suspend the currently running task to enable CPU
to process other tasks, so it is non-blocking
regarding the whole system.
When the desired delay time is more than a period of timer interrupt,
just use msleep(). Change mdelay() to mmc_delay() to avoid chewing
CPU when busy wait.
Signed-off-by: Shengzhou Liu <b36...@freescale.com>
Signed-off-by: Chunhe Lan <chunhe....@freescale.com>
Cc: Chris Ball <c...@laptop.org>
---
drivers/mmc/host/sdhci-esdhc.h | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h
index c3b08f1..b8c0ab1 100644
--- a/drivers/mmc/host/sdhci-esdhc.h
+++ b/drivers/mmc/host/sdhci-esdhc.h
@@ -1,7 +1,7 @@
/*
* Freescale eSDHC controller driver generics for OF and pltfm.
*
- * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ * Copyright (c) 2007, 2011 Freescale Semiconductor, Inc.
* Copyright (c) 2009 MontaVista Software, Inc.
* Copyright (c) 2010 Pengutronix e.K.
* Author: Wolfram Sang <w.s...@pengutronix.de>
@@ -73,7 +73,7 @@ static inline void esdhc_set_clock(struct sdhci_host *host,
unsigned int clock)
| (div << ESDHC_DIVIDER_SHIFT)
| (pre_div << ESDHC_PREDIV_SHIFT));
sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
- mdelay(100);
+ mmc_delay(100);
out:
host->clock = clock;
}
--
1.7.5.1
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