[ARM] 2855/1: S3C2410 - add CLKSLOW definitions, and show in init

Patch from Ben Dooks

Add the definitions for the S3C2410_CLKSLOW registers to
the header files, and show the values when the system
starts up
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

@@ -388,6 +388,7 @@ int __init s3c24xx_setup_clocks(unsigned long xtal,
 				unsigned long hclk,
 				unsigned long pclk)
 {
+	unsigned long clkslow = __raw_readl(S3C2410_CLKSLOW);
 	struct clk *clkp = init_clocks;
 	int ptr;
 	int ret;
@@ -446,5 +447,13 @@ int __init s3c24xx_setup_clocks(unsigned long xtal,
 		}
 	}
 
+	/* show the clock-slow value */
+
+	printk("CLOCK: Slow mode (%ld.%ld MHz), %s, MPLL %s, UPLL %s\n",
+	       print_mhz(xtal / ( 2 * S3C2410_CLKSLOW_GET_SLOWVAL(clkslow))),
+	       (clkslow & S3C2410_CLKSLOW_SLOW) ? "slow" : "fast",
+	       (clkslow & S3C2410_CLKSLOW_MPLL_OFF) ? "off" : "on",
+	       (clkslow & S3C2410_CLKSLOW_UCLK_OFF) ? "off" : "on");
+
 	return 0;
 }

include/asm-arm/arch-s3c2410/regs-clock.h

 /* linux/include/asm/arch-s3c2410/regs-clock.h
  *
- * Copyright (c) 2003,2004 Simtec Electronics <linux@simtec.co.uk>
- *		      http://www.simtec.co.uk/products/SWLINUX/
+ * Copyright (c) 2003,2004,2005 Simtec Electronics <linux@simtec.co.uk>
+ *		      http://armlinux.simtec.co.uk/
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -17,6 +17,7 @@
  *    29-Sep-2004 Ben Dooks	    Fixed usage for assembly inclusion
  *    10-Feb-2005 Ben Dooks	    Fixed CAMDIVN address (Guillaume Gourat)
  *    10-Mar-2005 Lucas Villa Real  Changed S3C2410_VA to S3C24XX_VA
+ *    27-Aug-2005 Ben Dooks	    Add clock-slow info
  */
 
 #ifndef __ASM_ARM_REGS_CLOCK
@@ -74,6 +75,12 @@
 #define S3C2410_CLKDIVN_PDIVN	     (1<<0)
 #define S3C2410_CLKDIVN_HDIVN	     (1<<1)
 
+#define S3C2410_CLKSLOW_UCLK_OFF	(1<<7)
+#define S3C2410_CLKSLOW_MPLL_OFF	(1<<5)
+#define S3C2410_CLKSLOW_SLOW		(1<<4)
+#define S3C2410_CLKSLOW_SLOWVAL(x)	(x)
+#define S3C2410_CLKSLOW_GET_SLOWVAL(x)	((x) & 7)
+
 #ifndef __ASSEMBLY__
 
 static inline unsigned int