Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=06dbbd69f94e97751782ef6f1a9bb19da60efd1c
Commit: 06dbbd69f94e97751782ef6f1a9bb19da60efd1c
Parent: 3a38e4be76e86c7b94c36dc8f3ce489987da24e4
Author: Ben Dooks <[EMAIL PROTECTED]>
AuthorDate: Mon Jan 28 13:01:35 2008 +0100
Committer: Russell King <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 13:20:52 2008 +0000
[ARM] 4795/1: S3C244X: Add armclk and setparent call
Add armclk to the supported clocks on the S3C2440 and S3C2442 to
better represent the DVS state which controls whether FCLK or HCLK
is fed to the ARM core.
Signed-off-by: Ben Dooks <[EMAIL PROTECTED]>
Signed-off-by: Russell King <[EMAIL PROTECTED]>
---
arch/arm/plat-s3c24xx/s3c244x-clock.c | 37 +++++++++++++++++++++++++++++++++
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 0bf5e7f..faf3e0f 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");
-
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