diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index e290b98..6d6b25c 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -88,7 +88,7 @@
 }
 
 /* TODO: Add support for gpmc_fck to clock framework and use it */
-static unsigned long gpmc_get_fclk_period(void)
+unsigned long gpmc_get_fclk_period(void)
 {
 	/* In picoseconds */
 	return 1000000000 / ((clk_get_rate(gpmc_l3_clk)) / 1000);
@@ -120,15 +120,21 @@
 	else
 		ticks = gpmc_ns_to_ticks(time);
 	nr_bits = end_bit - st_bit + 1;
-	if (ticks >= 1 << nr_bits)
+	if (ticks >= 1 << nr_bits) {
+#ifdef DEBUG
+		printk(KERN_INFO "GPMC CS%d: %-10s* %3d ns, %3d ticks >= %d\n",
+				cs, name, time, ticks, 1 << nr_bits);
+#endif
 		return -1;
+	}
 
 	mask = (1 << nr_bits) - 1;
 	l = gpmc_cs_read_reg(cs, reg);
 #ifdef DEBUG
-	printk(KERN_INFO "GPMC CS%d: %-10s: %d ticks, %3lu ns (was %i ticks)\n",
+	printk(KERN_INFO
+		"GPMC CS%d: %-10s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n",
 	       cs, name, ticks, gpmc_get_fclk_period() * ticks / 1000,
-	       (l >> st_bit) & mask);
+			(l >> st_bit) & mask, time);
 #endif
 	l &= ~(mask << st_bit);
 	l |= ticks << st_bit;
@@ -157,7 +163,7 @@
 	div = l / gpmc_get_fclk_period();
 	if (div > 4)
 		return -1;
-	if (div < 0)
+	if (div <= 0)
 		div = 1;
 
 	return div;
@@ -191,14 +197,19 @@
 
 	GPMC_SET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access);
 
-#ifdef DEBUG
-	printk(KERN_INFO "GPMC CS%d CLK period is %lu (div %d)\n",
-	       cs, gpmc_get_fclk_period(), div);
-#endif
-
+	/* caller is expected to have initialized CONFIG1 to cover
+	 * at least sync vs async
+	 */
 	l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
-	l &= ~0x03;
-	l |= (div - 1);
+	if (l & (GPMC_CONFIG1_READTYPE_SYNC | GPMC_CONFIG1_WRITETYPE_SYNC)) {
+#ifdef DEBUG
+		printk(KERN_INFO "GPMC CS%d CLK period is %lu ns (div %d)\n",
+				cs, (div * gpmc_get_fclk_period()) / 1000, div);
+#endif
+		l &= ~0x03;
+		l |= (div - 1);
+		gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l);
+	}
 
 	return 0;
 }