ARM: S3C24XX: Add .get_rate callback for "camif-upll" clock

Add missing get_rate callback for the "camif-upll" clock, so frequency
of this clock is properly reported with clk_get_rate().
Signed-off-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s3c24xx/clock-s3c2440.c

@@ -87,6 +87,19 @@ static int s3c2440_camif_upll_setrate(struct clk *clk, unsigned long rate)
 	return 0;
 }
 
+static unsigned long s3c2440_camif_upll_getrate(struct clk *clk)
+{
+	unsigned long parent_rate = clk_get_rate(clk->parent);
+	unsigned long camdivn =  __raw_readl(S3C2440_CAMDIVN);
+
+	if (!(camdivn & S3C2440_CAMDIVN_CAMCLK_SEL))
+		return parent_rate;
+
+	camdivn &= S3C2440_CAMDIVN_CAMCLK_MASK;
+
+	return parent_rate / (camdivn + 1) / 2;
+}
+
 /* Extra S3C2440 clocks */
 
 static struct clk s3c2440_clk_cam = {
@@ -99,6 +112,7 @@ static struct clk s3c2440_clk_cam_upll = {
 	.name		= "camif-upll",
 	.ops		= &(struct clk_ops) {
 		.set_rate	= s3c2440_camif_upll_setrate,
+		.get_rate	= s3c2440_camif_upll_getrate,
 		.round_rate	= s3c2440_camif_upll_round,
 	},
 };