sdhci-s3c: add SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK quirk

On Samsung's SDMMC hosts the timeout clock is derivied from the SD Clock
which is set dynamically.  So checked SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK
quirk and removed 'sdhci_s3c_get_timeout_clk' callback which doesn't need
any more.

Signed-off-by: Hyuk Lee <hyuk1.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/mmc/host/sdhci-s3c.c

@@ -110,11 +110,6 @@ static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host)
 	return max;
 }
 
-static unsigned int sdhci_s3c_get_timeout_clk(struct sdhci_host *host)
-{
-	return sdhci_s3c_get_max_clk(host) / 1000000;
-}
-
 /**
  * sdhci_s3c_consider_clock - consider one the bus clocks for current setting
  * @ourhost: Our SDHCI instance.
@@ -188,7 +183,6 @@ static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock)
 
 		ourhost->cur_clk = best_src;
 		host->max_clk = clk_get_rate(clk);
-		host->timeout_clk = sdhci_s3c_get_timeout_clk(host);
 
 		ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
 		ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK;
@@ -211,7 +205,6 @@ static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock)
 
 static struct sdhci_ops sdhci_s3c_ops = {
 	.get_max_clock		= sdhci_s3c_get_max_clk,
-	.get_timeout_clock	= sdhci_s3c_get_timeout_clk,
 	.set_clock		= sdhci_s3c_set_clock,
 };
 
@@ -335,6 +328,9 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
 	host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR |
 			 SDHCI_QUIRK_32BIT_DMA_SIZE);
 
+	/* HSMMC on Samsung SoCs uses SDCLK as timeout clock */
+	host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
+
 	ret = sdhci_add_host(host);
 	if (ret) {
 		dev_err(dev, "sdhci_add_host() failed\n");