Merge branch 'stable/swiotlb-0.9' of git://git.kernel.org/pub/scm/linux/kernel/git...

[pandora-kernel.git] / arch / arm / plat-samsung / clock.c

diff --git a/arch/arm/plat-samsung/clock.c b/arch/arm/plat-samsung/clock.c
index 90a2051..e8d20b0 100644 (file)
--- a/arch/arm/plat-samsung/clock.c
+++ b/arch/arm/plat-samsung/clock.c
@@ -48,6 +48,9 @@
 #include <plat/clock.h>
 #include <plat/cpu.h>
 
+#include <linux/serial_core.h>
+#include <plat/regs-serial.h> /* for s3c24xx_uart_devs */
+
 /* clock information */
 
 static LIST_HEAD(clocks);
@@ -65,6 +68,28 @@ static int clk_null_enable(struct clk *clk, int enable)
        return 0;
 }
 
+static int dev_is_s3c_uart(struct device *dev)
+{
+       struct platform_device **pdev = s3c24xx_uart_devs;
+       int i;
+       for (i = 0; i < ARRAY_SIZE(s3c24xx_uart_devs); i++, pdev++)
+               if (*pdev && dev == &(*pdev)->dev)
+                       return 1;
+       return 0;
+}
+
+/*
+ * Serial drivers call get_clock() very early, before platform bus
+ * has been set up, this requires a special check to let them get
+ * a proper clock
+ */
+
+static int dev_is_platform_device(struct device *dev)
+{
+       return dev->bus == &platform_bus_type ||
+              (dev->bus == NULL && dev_is_s3c_uart(dev));
+}
+
 /* Clock API calls */
 
 struct clk *clk_get(struct device *dev, const char *id)
@@ -73,7 +98,7 @@ struct clk *clk_get(struct device *dev, const char *id)
        struct clk *clk = ERR_PTR(-ENOENT);
        int idno;
 
-       if (dev == NULL || dev->bus != &platform_bus_type)
+       if (dev == NULL || !dev_is_platform_device(dev))
                idno = -1;
        else
                idno = to_platform_device(dev)->id;