1 files changed, 37 insertions, 0 deletions

diff --git a/arch/arm/plat-s3c24xx/s3c244x-clock.c b/arch/arm/plat-s3c24xx/s3c244x-clock.c
index 0bf5e7fbb2bf..faf3e0f9f4e2 100644
--- a/arch/arm/plat-s3c24xx/s3c244x-clock.c
+++ b/arch/arm/plat-s3c24xx/s3c244x-clock.c
@@ -44,15 +44,52 @@
 #include <asm/plat-s3c24xx/clock.h>
 #include <asm/plat-s3c24xx/cpu.h>
 
+static int s3c2440_setparent_armclk(struct clk *clk, struct clk *parent)
+{
+        unsigned long camdivn;
+        unsigned long dvs;
+
+        if (parent == &clk_f)
+                dvs = 0;
+        else if (parent == &clk_h)
+                dvs = S3C2440_CAMDIVN_DVSEN;
+        else
+                return -EINVAL;
+
+        clk->parent = parent;
+
+        camdivn  = __raw_readl(S3C2440_CAMDIVN);
+        camdivn &= ~S3C2440_CAMDIVN_DVSEN;
+        camdivn |= dvs;
+        __raw_writel(camdivn, S3C2440_CAMDIVN);
+
+        return 0;
+}
+
+static struct clk clk_arm = {
+        .name           = "armclk",
+        .id             = -1,
+        .set_parent     = s3c2440_setparent_armclk,
+};
+
 static int s3c244x_clk_add(struct sys_device *sysdev)
 {
         unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN);
         unsigned long clkdivn;
         struct clk *clock_upll;
+        int ret;
 
         printk("S3C244X: Clock Support, DVS %s\n",
                (camdivn & S3C2440_CAMDIVN_DVSEN) ? "on" : "off");
 
+        clk_arm.parent = (camdivn & S3C2440_CAMDIVN_DVSEN) ? &clk_h : &clk_f;
+
+        ret = s3c24xx_register_clock(&clk_arm);
+        if (ret < 0) {
+                printk(KERN_ERR "S3C24XX: Failed to add armclk (%d)\n", ret);
+                return ret;
+        }
+
         clock_upll = clk_get(NULL, "upll");
         if (IS_ERR(clock_upll)) {
                 printk(KERN_ERR "S3C244X: Failed to get upll clock\n");