ARM: EXYNOS4: Implement Clock gating for System MMU

This patch includes the implementation of the clock gating
for System MMU. Initially, all System MMUs are not asserted
the system clock. Asserting the system clock to a System MMU
is enabled only when s5p_sysmmu_enable() is called. Likewise,
it is disabled only when s5p_sysmmu_disable() is called.
Therefore, clock gating on System MMUs are still invisible to
the outside of the System MMU driver.

Signed-off-by: KyongHo Cho <pullip.cho@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/mach-exynos4/include/mach/regs-clock.h b/arch/arm/mach-exynos4/include/mach/regs-clock.h
index c91f930..6e311c1 100644
--- a/arch/arm/mach-exynos4/include/mach/regs-clock.h
+++ b/arch/arm/mach-exynos4/include/mach/regs-clock.h
@@ -19,11 +19,11 @@
 
 #define S5P_CLKDIV_LEFTBUS		S5P_CLKREG(0x04500)
 #define S5P_CLKDIV_STAT_LEFTBUS		S5P_CLKREG(0x04600)
-#define S5P_CLKGATE_IP_LEFTBUS          S5P_CLKREG(0x04800)
+#define S5P_CLKGATE_IP_LEFTBUS		S5P_CLKREG(0x04800)
 
 #define S5P_CLKDIV_RIGHTBUS		S5P_CLKREG(0x08500)
 #define S5P_CLKDIV_STAT_RIGHTBUS	S5P_CLKREG(0x08600)
-#define S5P_CLKGATE_IP_RIGHTBUS         S5P_CLKREG(0x08800)
+#define S5P_CLKGATE_IP_RIGHTBUS		S5P_CLKREG(0x08800)
 
 #define S5P_EPLL_CON0			S5P_CLKREG(0x0C110)
 #define S5P_EPLL_CON1			S5P_CLKREG(0x0C114)
@@ -76,7 +76,7 @@
 
 #define S5P_CLKGATE_SCLKCAM		S5P_CLKREG(0x0C820)
 #define S5P_CLKGATE_IP_CAM		S5P_CLKREG(0x0C920)
-#define S5P_CLKGATE_IP_TV	        S5P_CLKREG(0x0C924)
+#define S5P_CLKGATE_IP_TV		S5P_CLKREG(0x0C924)
 #define S5P_CLKGATE_IP_MFC		S5P_CLKREG(0x0C928)
 #define S5P_CLKGATE_IP_G3D		S5P_CLKREG(0x0C92C)
 #define S5P_CLKGATE_IP_IMAGE		S5P_CLKREG(0x0C930)
@@ -113,20 +113,16 @@
 #define S5P_CLKGATE_SCLKCPU		S5P_CLKREG(0x14800)
 #define S5P_CLKGATE_IP_CPU		S5P_CLKREG(0x14900)
 
-/* APLL_LOCK */
 #define S5P_APLL_LOCKTIME		(0x1C20)	/* 300us */
 
-/* APLL_CON0 */
 #define S5P_APLLCON0_ENABLE_SHIFT	(31)
 #define S5P_APLLCON0_LOCKED_SHIFT	(29)
 #define S5P_APLL_VAL_1000		((250 << 16) | (6 << 8) | 1)
 #define S5P_APLL_VAL_800		((200 << 16) | (6 << 8) | 1)
 
-/* CLK_SRC_CPU */
 #define S5P_CLKSRC_CPU_MUXCORE_SHIFT	(16)
 #define S5P_CLKMUX_STATCPU_MUXCORE_MASK	(0x7 << S5P_CLKSRC_CPU_MUXCORE_SHIFT)
 
-/* CLKDIV_CPU0 */
 #define S5P_CLKDIV_CPU0_CORE_SHIFT	(0)
 #define S5P_CLKDIV_CPU0_CORE_MASK	(0x7 << S5P_CLKDIV_CPU0_CORE_SHIFT)
 #define S5P_CLKDIV_CPU0_COREM0_SHIFT	(4)
@@ -142,7 +138,6 @@
 #define S5P_CLKDIV_CPU0_APLL_SHIFT	(24)
 #define S5P_CLKDIV_CPU0_APLL_MASK	(0x7 << S5P_CLKDIV_CPU0_APLL_SHIFT)
 
-/* CLKDIV_DMC0 */
 #define S5P_CLKDIV_DMC0_ACP_SHIFT	(0)
 #define S5P_CLKDIV_DMC0_ACP_MASK	(0x7 << S5P_CLKDIV_DMC0_ACP_SHIFT)
 #define S5P_CLKDIV_DMC0_ACPPCLK_SHIFT	(4)
@@ -160,7 +155,6 @@
 #define S5P_CLKDIV_DMC0_CORETI_SHIFT	(28)
 #define S5P_CLKDIV_DMC0_CORETI_MASK	(0x7 << S5P_CLKDIV_DMC0_CORETI_SHIFT)
 
-/* CLKDIV_TOP */
 #define S5P_CLKDIV_TOP_ACLK200_SHIFT	(0)
 #define S5P_CLKDIV_TOP_ACLK200_MASK	(0x7 << S5P_CLKDIV_TOP_ACLK200_SHIFT)
 #define S5P_CLKDIV_TOP_ACLK100_SHIFT	(4)
@@ -172,7 +166,6 @@
 #define S5P_CLKDIV_TOP_ONENAND_SHIFT	(16)
 #define S5P_CLKDIV_TOP_ONENAND_MASK	(0x7 << S5P_CLKDIV_TOP_ONENAND_SHIFT)
 
-/* CLKDIV_LEFTBUS / CLKDIV_RIGHTBUS*/
 #define S5P_CLKDIV_BUS_GDLR_SHIFT	(0)
 #define S5P_CLKDIV_BUS_GDLR_MASK	(0x7 << S5P_CLKDIV_BUS_GDLR_SHIFT)
 #define S5P_CLKDIV_BUS_GPLR_SHIFT	(4)