Some controllers do not provide clock information in their
capabilities (in the Samsung case, it is because there are
multiple clock sources available to the controller). Add hooks
to allow the system to supply clock information.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

Index: linux.git/drivers/mmc/host/sdhci.c
===================================================================
--- linux.git.orig/drivers/mmc/host/sdhci.c	2008-12-01 19:11:54.000000000 +0000
+++ linux.git/drivers/mmc/host/sdhci.c	2008-12-01 19:24:14.000000000 +0000
@@ -1606,18 +1606,26 @@ int sdhci_add_host(struct sdhci_host *ho
 
 	host->max_clk =
 		(caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
+	host->max_clk *= 1000000;
 	if (host->max_clk == 0) {
-		printk(KERN_ERR "%s: Hardware doesn't specify base clock "
-			"frequency.\n", mmc_hostname(mmc));
+		if (host->ops->get_max_clock)
+			host->max_clk = host->ops->get_max_clock(host);
+		else
+			printk(KERN_ERR
+			       "%s: Hardware doesn't specify base clock "
+			       "frequency.\n", mmc_hostname(mmc));
 		return -ENODEV;
 	}
-	host->max_clk *= 1000000;
 
 	host->timeout_clk =
 		(caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
 	if (host->timeout_clk == 0) {
-		printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
-			"frequency.\n", mmc_hostname(mmc));
+		if (host->ops->get_timeout_clock)
+			host->timeout_clk = host->ops->get_timeout_clock(host);
+		else
+			printk(KERN_ERR
+			       "%s: Hardware doesn't specify timeout clock "
+			       "frequency.\n", mmc_hostname(mmc));
 		return -ENODEV;
 	}
 	if (caps & SDHCI_TIMEOUT_CLK_UNIT)
Index: linux.git/drivers/mmc/host/sdhci.h
===================================================================
--- linux.git.orig/drivers/mmc/host/sdhci.h	2008-12-01 19:11:54.000000000 +0000
+++ linux.git/drivers/mmc/host/sdhci.h	2008-12-01 19:17:55.000000000 +0000
@@ -267,6 +267,8 @@ struct sdhci_host {
 
 struct sdhci_ops {
 	int		(*enable_dma)(struct sdhci_host *host);
+	unsigned int	(*get_max_clock)(struct sdhci_host *host);
+	unsigned int	(*get_timeout_clock)(struct sdhci_host *host);
 };
 
 

-- 
Ben (ben@fluff.org, http://www.fluff.org/)

  'a smiley only costs 4 bytes'
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/