ARM: OMAP2+: clockdomains: make {prm,cm}_clkdm common

The PRM and CM implicit clockdomains will soon be used by OMAP44xx.
So, make them common to OMAP2+ and modify the OMAP4 clockdomains code
so use of these clockdomains doesn't crash the system.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Rajendra Nayak <rnayak@ti.com>

arch/arm/mach-omap2/Makefile

@@ -118,16 +118,18 @@ obj-$(CONFIG_ARCH_OMAP4)		+= $(powerdomain-common) \
 					   powerdomains44xx_data.o
 
 # PRCM clockdomain control
-obj-$(CONFIG_ARCH_OMAP2)		+= clockdomain.o \
+clockdomain-common			+= clockdomain.o \
+					   clockdomains_common_data.o
+obj-$(CONFIG_ARCH_OMAP2)		+= $(clockdomain-common) \
 					   clockdomain2xxx_3xxx.o \
 					   clockdomains2xxx_3xxx_data.o
 obj-$(CONFIG_SOC_OMAP2420)		+= clockdomains2420_data.o
 obj-$(CONFIG_SOC_OMAP2430)		+= clockdomains2430_data.o
-obj-$(CONFIG_ARCH_OMAP3)		+= clockdomain.o \
+obj-$(CONFIG_ARCH_OMAP3)		+= $(clockdomain-common) \
 					   clockdomain2xxx_3xxx.o \
 					   clockdomains2xxx_3xxx_data.o \
 					   clockdomains3xxx_data.o
-obj-$(CONFIG_ARCH_OMAP4)		+= clockdomain.o \
+obj-$(CONFIG_ARCH_OMAP4)		+= $(clockdomain-common) \
 					   clockdomain44xx.o \
 					   clockdomains44xx_data.o
 

arch/arm/mach-omap2/clockdomain44xx.c

@@ -51,6 +51,9 @@ static int omap4_clkdm_clear_all_wkup_sleep_deps(struct clockdomain *clkdm)
 	struct clkdm_dep *cd;
 	u32 mask = 0;
 
+	if (!clkdm->prcm_partition)
+		return 0;
+
 	for (cd = clkdm->wkdep_srcs; cd && cd->clkdm_name; cd++) {
 		if (!cd->clkdm)
 			continue; /* only happens if data is erroneous */
@@ -103,6 +106,9 @@ static int omap4_clkdm_clk_disable(struct clockdomain *clkdm)
 {
 	bool hwsup = false;
 
+	if (!clkdm->prcm_partition)
+		return 0;
+
 	hwsup = omap4_cminst_is_clkdm_in_hwsup(clkdm->prcm_partition,
 					clkdm->cm_inst, clkdm->clkdm_offs);
 

arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.c

@@ -89,13 +89,3 @@ struct clockdomain wkup_common_clkdm = {
 	.pwrdm		= { .name = "wkup_pwrdm" },
 	.dep_bit	= OMAP_EN_WKUP_SHIFT,
 };
-
-struct clockdomain prm_common_clkdm = {
-	.name		= "prm_clkdm",
-	.pwrdm		= { .name = "wkup_pwrdm" },
-};
-
-struct clockdomain cm_common_clkdm = {
-	.name		= "cm_clkdm",
-	.pwrdm		= { .name = "core_pwrdm" },
-};

arch/arm/mach-omap2/clockdomains44xx_data.c

@@ -430,6 +430,8 @@ static struct clockdomain *clockdomains_omap44xx[] __initdata = {
 	&l4_wkup_44xx_clkdm,
 	&emu_sys_44xx_clkdm,
 	&l3_dma_44xx_clkdm,
+	&prm_common_clkdm,
+	&cm_common_clkdm,
 	NULL
 };
 

arch/arm/mach-omap2/clockdomains_common_data.c

@@ -0,0 +1,24 @@
+/*
+ * OMAP2+-common clockdomain data
+ *
+ * Copyright (C) 2008-2012 Texas Instruments, Inc.
+ * Copyright (C) 2008-2010 Nokia Corporation
+ *
+ * Paul Walmsley, Jouni Högander
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+
+#include "clockdomain.h"
+
+/* These are implicit clockdomains - they are never defined as such in TRM */
+struct clockdomain prm_common_clkdm = {
+	.name		= "prm_clkdm",
+	.pwrdm		= { .name = "wkup_pwrdm" },
+};
+
+struct clockdomain cm_common_clkdm = {
+	.name		= "cm_clkdm",
+	.pwrdm		= { .name = "core_pwrdm" },
+};