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-rw-r--r--arch/arm/plat-s3c24xx/s3c244x-clock.c37
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 0bf5e7fbb2b..faf3e0f9f4e 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");