ARM: ICST: kill duplicate icst code

The only difference between ICST307 and ICST525 are the two arrays
for calculating the S parameter; the code is now identical.  Merge
the two files and kill the duplicated code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 11 insertions, 115 deletions

diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig
index 4efbb9df044..323d2d28952 100644
--- a/arch/arm/common/Kconfig
+++ b/arch/arm/common/Kconfig
@@ -12,10 +12,7 @@ config ARM_VIC_NR
 	  The maximum number of VICs available in the system, for
 	  power management.
 
-config ICST525
-	bool
-
-config ICST307
+config ICST
 	bool
 
 config SA1111
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index 76be7ff2a7c..5e8ad0d6c91 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -4,8 +4,7 @@
 
 obj-$(CONFIG_ARM_GIC)		+= gic.o
 obj-$(CONFIG_ARM_VIC)		+= vic.o
-obj-$(CONFIG_ICST525)		+= icst525.o
-obj-$(CONFIG_ICST307)		+= icst307.o
+obj-$(CONFIG_ICST)		+= icst.o
 obj-$(CONFIG_SA1111)		+= sa1111.o
 obj-$(CONFIG_PCI_HOST_VIA82C505) += via82c505.o
 obj-$(CONFIG_DMABOUNCE)		+= dmabounce.o
diff --git a/arch/arm/common/icst307.c b/arch/arm/common/icst.c
index 8332c0726e7..9a7f09cff30 100644
--- a/arch/arm/common/icst307.c
+++ b/arch/arm/common/icst.c
@@ -17,31 +17,33 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 
-#include <asm/hardware/icst307.h>
+#include <asm/hardware/icst.h>
 
 /*
  * Divisors for each OD setting.
  */
 const unsigned char icst307_s2div[8] = { 10, 2, 8, 4, 5, 7, 3, 6 };
-
+const unsigned char icst525_s2div[8] = { 10, 2, 8, 4, 5, 7, 9, 6 };
 EXPORT_SYMBOL(icst307_s2div);
+EXPORT_SYMBOL(icst525_s2div);
 
-unsigned long icst307_hz(const struct icst_params *p, struct icst_vco vco)
+unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco)
 {
 	return p->ref * 2 * (vco.v + 8) / ((vco.r + 2) * p->s2div[vco.s]);
 }
 
-EXPORT_SYMBOL(icst307_hz);
+EXPORT_SYMBOL(icst_hz);
 
 /*
  * Ascending divisor S values.
  */
 const unsigned char icst307_idx2s[8] = { 1, 6, 3, 4, 7, 5, 2, 0 };
-
+const unsigned char icst525_idx2s[8] = { 1, 3, 4, 7, 5, 2, 6, 0 };
 EXPORT_SYMBOL(icst307_idx2s);
+EXPORT_SYMBOL(icst525_idx2s);
 
 struct icst_vco
-icst307_hz_to_vco(const struct icst_params *p, unsigned long freq)
+icst_hz_to_vco(const struct icst_params *p, unsigned long freq)
 {
 	struct icst_vco vco = { .s = 1, .v = p->vd_max, .r = p->rd_max };
 	unsigned long f;
@@ -54,9 +56,6 @@ icst307_hz_to_vco(const struct icst_params *p, unsigned long freq)
 	do {
 		f = freq * p->s2div[p->idx2s[i]];
 
-		/*
-		 * f must be between 6MHz and 200MHz (3.3 or 5V)
-		 */
 		if (f > p->vco_min && f <= p->vco_max)
 			break;
 	} while (i < 8);
@@ -98,4 +97,4 @@ icst307_hz_to_vco(const struct icst_params *p, unsigned long freq)
 	return vco;
 }
 
-EXPORT_SYMBOL(icst307_hz_to_vco);
+EXPORT_SYMBOL(icst_hz_to_vco);
diff --git a/arch/arm/common/icst525.c b/arch/arm/common/icst525.c
deleted file mode 100644
index 4180255eb07..00000000000
--- a/arch/arm/common/icst525.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- *  linux/arch/arm/common/icst525.c
- *
- *  Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
- *
- * 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
- * published by the Free Software Foundation.
- *
- *  Support functions for calculating clocks/divisors for the ICST525
- *  clock generators.  See http://www.icst.com/ for more information
- *  on these devices.
- */
-#include <linux/module.h>
-#include <linux/kernel.h>
-
-#include <asm/hardware/icst525.h>
-
-/*
- * Divisors for each OD setting.
- */
-const unsigned char icst525_s2div[8] = { 10, 2, 8, 4, 5, 7, 9, 6 };
-
-EXPORT_SYMBOL(icst525_s2div);
-
-unsigned long icst525_hz(const struct icst_params *p, struct icst_vco vco)
-{
-	return p->ref * 2 * (vco.v + 8) / ((vco.r + 2) * p->s2div[vco.s]);
-}
-
-EXPORT_SYMBOL(icst525_hz);
-
-/*
- * Ascending divisor S values.
- */
-const unsigned char icst525_idx2s[8] = { 1, 3, 4, 7, 5, 2, 6, 0 };
-
-EXPORT_SYMBOL(icst525_idx2s);
-
-struct icst_vco
-icst525_hz_to_vco(const struct icst_params *p, unsigned long freq)
-{
-	struct icst_vco vco = { .s = 1, .v = p->vd_max, .r = p->rd_max };
-	unsigned long f;
-	unsigned int i = 0, rd, best = (unsigned int)-1;
-
-	/*
-	 * First, find the PLL output divisor such
-	 * that the PLL output is within spec.
-	 */
-	do {
-		f = freq * p->s2div[p->idx2s[i]];
-
-		/*
-		 * f must be between 10MHz and
-		 *  320MHz (5V) or 200MHz (3V)
-		 */
-		if (f > p->vco_min && f <= p->vco_max)
-			break;
-	} while (i < 8);
-
-	if (i >= 8)
-		return vco;
-
-	vco.s = p->idx2s[i];
-
-	/*
-	 * Now find the closest divisor combination
-	 * which gives a PLL output of 'f'.
-	 */
-	for (rd = p->rd_min; rd <= p->rd_max; rd++) {
-		unsigned long fref_div, f_pll;
-		unsigned int vd;
-		int f_diff;
-
-		fref_div = (2 * p->ref) / rd;
-
-		vd = (f + fref_div / 2) / fref_div;
-		if (vd < p->vd_min || vd > p->vd_max)
-			continue;
-
-		f_pll = fref_div * vd;
-		f_diff = f_pll - f;
-		if (f_diff < 0)
-			f_diff = -f_diff;
-
-		if ((unsigned)f_diff < best) {
-			vco.v = vd - 8;
-			vco.r = rd - 2;
-			if (f_diff == 0)
-				break;
-			best = f_diff;
-		}
-	}
-
-	return vco;
-}
-
-EXPORT_SYMBOL(icst525_hz_to_vco);