OMAP2 clockdomain: add virt_opp_clkdm

Every OMAP2/3 clock will need to be associated with a clockdomain.
However, the "virt_prcm_set" clock has no clockdomain, since it is a
virtual clock without any hardware referents.  So, create a new
clockdomain, "virt_clkdm", for this clock.  This clockdomain should be
reusable for OMAP3 virtual clock nodes.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/clock24xx.h

@@ -2666,6 +2666,7 @@ static struct clk virt_prcm_set = {
 	.name		= "virt_prcm_set",
 	.flags		= CLOCK_IN_OMAP242X | CLOCK_IN_OMAP243X |
 				VIRTUAL_CLOCK | ALWAYS_ENABLED | DELAYED_APP,
+	.clkdm		= { .name = "virt_opp_clkdm" },
 	.parent		= &mpu_ck,	/* Indexed by mpu speed, no parent */
 	.recalc		= &omap2_table_mpu_recalc,	/* sets are keyed on mpu rate */
 	.set_rate	= &omap2_select_table_rate,

arch/arm/mach-omap2/clockdomains.h

@@ -33,6 +33,16 @@ static struct clockdomain cm_clkdm = {
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP24XX | CHIP_IS_OMAP3430),
 };
 
+/*
+ * virt_opp_clkdm is intended solely for use with virtual OPP clocks,
+ * e.g., virt_prcm_set, until OPP handling is rationalized.
+ */
+static struct clockdomain virt_opp_clkdm = {
+	.name		= "virt_opp_clkdm",
+	.pwrdm		= { .name = "wkup_pwrdm" },
+	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP24XX),
+};
+
 /*
  * 2420-only clockdomains
  */
@@ -307,6 +317,7 @@ static struct clockdomain *clockdomains_omap[] = {
 
 	&cm_clkdm,
 	&prm_clkdm,
+	&virt_opp_clkdm,
 
 #ifdef CONFIG_ARCH_OMAP2420
 	&mpu_2420_clkdm,