From 8e40a2f91c6e73726a75381e4438478eb5964cb7 Mon Sep 17 00:00:00 2001
From: Ben Dooks <ben-linux@fluff.org>
Date: Mon, 20 Mar 2006 17:10:04 +0000
Subject: [ARM] 3330/1: S3C24XX - move UPLL to main clock

Patch from Ben Dooks

Move the UPLL clock registration to the central
clock file, and add an enable method

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/mach-s3c2410/clock.c         | 38 ++++++++++++++++++++++++++++++++++-
 arch/arm/mach-s3c2410/s3c2440-clock.c | 19 +-----------------
 2 files changed, 38 insertions(+), 19 deletions(-)

(limited to 'arch/arm')

diff --git a/arch/arm/mach-s3c2410/clock.c b/arch/arm/mach-s3c2410/clock.c
index 08489efdaf0..aaada9e3d67 100644
--- a/arch/arm/mach-s3c2410/clock.c
+++ b/arch/arm/mach-s3c2410/clock.c
@@ -38,6 +38,7 @@
 #include <linux/ioport.h>
 #include <linux/clk.h>
 #include <linux/mutex.h>
+#include <linux/delay.h>
 
 #include <asm/hardware.h>
 #include <asm/irq.h>
@@ -200,6 +201,28 @@ EXPORT_SYMBOL(clk_round_rate);
 EXPORT_SYMBOL(clk_set_rate);
 EXPORT_SYMBOL(clk_get_parent);
 
+/* base clock enable */
+
+static int s3c24xx_upll_enable(struct clk *clk, int enable)
+{
+	unsigned long clkslow = __raw_readl(S3C2410_CLKSLOW);
+	unsigned long orig = clkslow;
+
+	if (enable)
+		clkslow &= ~S3C2410_CLKSLOW_UCLK_OFF;
+	else
+		clkslow |= S3C2410_CLKSLOW_UCLK_OFF;
+
+	__raw_writel(clkslow, S3C2410_CLKSLOW);
+
+	/* if we started the UPLL, then allow to settle */
+
+	if (enable && !(orig & S3C2410_CLKSLOW_UCLK_OFF))
+		udelay(200);
+
+	return 0;
+}
+
 /* base clocks */
 
 static struct clk clk_xtal = {
@@ -210,6 +233,14 @@ static struct clk clk_xtal = {
 	.ctrlbit	= 0,
 };
 
+static struct clk clk_upll = {
+	.name		= "upll",
+	.id		= -1,
+	.parent		= NULL,
+	.enable		= s3c24xx_upll_enable,
+	.ctrlbit	= 0,
+};
+
 static struct clk clk_f = {
 	.name		= "fclk",
 	.id		= -1,
@@ -262,7 +293,7 @@ struct clk s3c24xx_uclk = {
 };
 
 
-/* clock definitions */
+/* standard clock definitions */
 
 static struct clk init_clocks[] = {
 	{
@@ -396,6 +427,7 @@ int __init s3c24xx_setup_clocks(unsigned long xtal,
 				unsigned long hclk,
 				unsigned long pclk)
 {
+	unsigned long upllcon = __raw_readl(S3C2410_UPLLCON);
 	unsigned long clkslow = __raw_readl(S3C2410_CLKSLOW);
 	struct clk *clkp = init_clocks;
 	int ptr;
@@ -406,6 +438,7 @@ int __init s3c24xx_setup_clocks(unsigned long xtal,
 	/* initialise the main system clocks */
 
 	clk_xtal.rate = xtal;
+	clk_upll.rate = s3c2410_get_pll(upllcon, xtal);
 
 	clk_h.rate = hclk;
 	clk_p.rate = pclk;
@@ -439,6 +472,9 @@ int __init s3c24xx_setup_clocks(unsigned long xtal,
 	if (s3c24xx_register_clock(&clk_xtal) < 0)
 		printk(KERN_ERR "failed to register master xtal\n");
 
+	if (s3c24xx_register_clock(&clk_upll) < 0)
+		printk(KERN_ERR "failed to register upll clock\n");
+
 	if (s3c24xx_register_clock(&clk_f) < 0)
 		printk(KERN_ERR "failed to register cpu fclk\n");
 
diff --git a/arch/arm/mach-s3c2410/s3c2440-clock.c b/arch/arm/mach-s3c2410/s3c2440-clock.c
index b557a2be8a0..2d0fa03a257 100644
--- a/arch/arm/mach-s3c2410/s3c2440-clock.c
+++ b/arch/arm/mach-s3c2410/s3c2440-clock.c
@@ -45,11 +45,6 @@
 
 /* S3C2440 extended clock support */
 
-static struct clk s3c2440_clk_upll = {
-	.name		= "upll",
-	.id		= -1,
-};
-
 static struct clk s3c2440_clk_cam = {
 	.name		= "camif",
 	.id		= -1,
@@ -66,22 +61,11 @@ static struct clk s3c2440_clk_ac97 = {
 
 static int s3c2440_clk_add(struct sys_device *sysdev)
 {
-	unsigned long upllcon = __raw_readl(S3C2410_UPLLCON);
 	unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN);
 	struct clk *clk_h;
 	struct clk *clk_p;
-	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, UPLL %ld.%03ld MHz, DVS %s\n",
-	       print_mhz(s3c2440_clk_upll.rate),
+	printk("S3C2440: Clock Support, DVS %s\n",
 	       (camdivn & S3C2440_CAMDIVN_DVSEN) ? "on" : "off");
 
 	clk_p = clk_get(NULL, "pclk");
@@ -97,7 +81,6 @@ static int s3c2440_clk_add(struct sys_device *sysdev)
 
 	s3c24xx_register_clock(&s3c2440_clk_ac97);
 	s3c24xx_register_clock(&s3c2440_clk_cam);
-	s3c24xx_register_clock(&s3c2440_clk_upll);
 
 	clk_disable(&s3c2440_clk_ac97);
 	clk_disable(&s3c2440_clk_cam);
-- 
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