#include <linux/sysdev.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
-#include <linux/mutex.h>
#include <linux/clk.h>
#include <asm/hardware.h>
/* S3C2440 extended clock support */
-static unsigned long s3c2440_camif_upll_round(struct clk *clk,
- unsigned long rate)
-{
- unsigned long parent_rate = clk_get_rate(clk->parent);
- int div;
-
- if (rate > parent_rate)
- return parent_rate;
-
- /* note, we remove the +/- 1 calculations for the divisor */
-
- div = (parent_rate / rate) / 2;
-
- if (div < 1)
- div = 1;
- else if (div > 16)
- div = 16;
-
- return parent_rate / (div * 2);
-}
-
-static int s3c2440_camif_upll_setrate(struct clk *clk, unsigned long rate)
-{
- unsigned long parent_rate = clk_get_rate(clk->parent);
- unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN);
-
- rate = s3c2440_camif_upll_round(clk, rate);
-
- camdivn &= ~(S3C2440_CAMDIVN_CAMCLK_SEL | S3C2440_CAMDIVN_CAMCLK_MASK);
-
- if (rate != parent_rate) {
- camdivn |= S3C2440_CAMDIVN_CAMCLK_SEL;
- camdivn |= (((parent_rate / rate) / 2) - 1);
- }
-
- __raw_writel(camdivn, S3C2440_CAMDIVN);
-
- return 0;
-}
-
-/* Extra S3C2440 clocks */
+static struct clk s3c2440_clk_upll = {
+ .name = "upll",
+ .id = -1,
+};
static struct clk s3c2440_clk_cam = {
.name = "camif",
.id = -1,
- .enable = s3c2410_clkcon_enable,
+ .enable = s3c24xx_clkcon_enable,
.ctrlbit = S3C2440_CLKCON_CAMERA,
};
-static struct clk s3c2440_clk_cam_upll = {
- .name = "camif-upll",
- .id = -1,
- .set_rate = s3c2440_camif_upll_setrate,
- .round_rate = s3c2440_camif_upll_round,
-};
-
static struct clk s3c2440_clk_ac97 = {
.name = "ac97",
.id = -1,
- .enable = s3c2410_clkcon_enable,
+ .enable = s3c24xx_clkcon_enable,
.ctrlbit = S3C2440_CLKCON_CAMERA,
};
static int s3c2440_clk_add(struct sys_device *sysdev)
{
+ unsigned long upllcon = __raw_readl(S3C2410_UPLLCON);
unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN);
- unsigned long clkdivn;
struct clk *clk_h;
struct clk *clk_p;
- struct clk *clk_upll;
+ struct clk *clk_xtal;
+
+ clk_xtal = clk_get(NULL, "xtal");
+ if (IS_ERR(clk_xtal)) {
+ printk(KERN_ERR "S3C2440: Failed to get clk_xtal\n");
+ return -EINVAL;
+ }
+
+ s3c2440_clk_upll.rate = s3c2410_get_pll(upllcon, clk_xtal->rate);
- printk("S3C2440: Clock Support, DVS %s\n",
+ printk("S3C2440: Clock Support, UPLL %ld.%03ld MHz, DVS %s\n",
+ print_mhz(s3c2440_clk_upll.rate),
(camdivn & S3C2440_CAMDIVN_DVSEN) ? "on" : "off");
clk_p = clk_get(NULL, "pclk");
clk_h = clk_get(NULL, "hclk");
- clk_upll = clk_get(NULL, "upll");
- if (IS_ERR(clk_p) || IS_ERR(clk_h) || IS_ERR(clk_upll)) {
+ if (IS_ERR(clk_p) || IS_ERR(clk_h)) {
printk(KERN_ERR "S3C2440: Failed to get parent clocks\n");
return -EINVAL;
}
- /* check rate of UPLL, and if it is near 96MHz, then change
- * to using half the UPLL rate for the system */
-
- if (clk_get_rate(clk_upll) > (94 * MHZ)) {
- clk_usb_bus.rate = clk_get_rate(clk_upll) / 2;
-
- mutex_lock(&clocks_mutex);
-
- clkdivn = __raw_readl(S3C2410_CLKDIVN);
- clkdivn |= S3C2440_CLKDIVN_UCLK;
- __raw_writel(clkdivn, S3C2410_CLKDIVN);
-
- mutex_unlock(&clocks_mutex);
- }
-
s3c2440_clk_cam.parent = clk_h;
s3c2440_clk_ac97.parent = clk_p;
- s3c2440_clk_cam_upll.parent = clk_upll;
s3c24xx_register_clock(&s3c2440_clk_ac97);
s3c24xx_register_clock(&s3c2440_clk_cam);
- s3c24xx_register_clock(&s3c2440_clk_cam_upll);
+ s3c24xx_register_clock(&s3c2440_clk_upll);
clk_disable(&s3c2440_clk_ac97);
clk_disable(&s3c2440_clk_cam);