ARM: S5P6442: Add DMA operation clock

This patch adds DMA operation clock which is disabled as default.
Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>
Acked-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s5p6442/clock.c

@@ -192,6 +192,11 @@ static struct clk clk_pclkd1 = {
 	.parent		= &clk_hclkd1,
 };
 
+int s5p6442_clk_ip0_ctrl(struct clk *clk, int enable)
+{
+	return s5p_gatectrl(S5P_CLKGATE_IP0, clk, enable);
+}
+
 int s5p6442_clk_ip3_ctrl(struct clk *clk, int enable)
 {
 	return s5p_gatectrl(S5P_CLKGATE_IP3, clk, enable);
@@ -335,6 +340,16 @@ void __init_or_cpufreq s5p6442_setup_clocks(void)
 	clk_pclkd1.rate = pclkd1;
 }
 
+static struct clk init_clocks_disable[] = {
+	{
+		.name		= "pdma",
+		.id		= -1,
+		.parent		= &clk_pclkd1,
+		.enable		= s5p6442_clk_ip0_ctrl,
+		.ctrlbit	= (1 << 3),
+	},
+};
+
 static struct clk init_clocks[] = {
 	{
 		.name		= "systimer",
@@ -393,10 +408,23 @@ static struct clk *clks[] __initdata = {
 
 void __init s5p6442_register_clocks(void)
 {
+	struct clk *clkptr;
+	int i, ret;
+
 	s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
 
 	s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
 	s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
 
+	clkptr = init_clocks_disable;
+	for (i = 0; i < ARRAY_SIZE(init_clocks_disable); i++, clkptr++) {
+		ret = s3c24xx_register_clock(clkptr);
+		if (ret < 0) {
+			printk(KERN_ERR "Fail to register clock %s (%d)\n",
+					clkptr->name, ret);
+		} else
+			(clkptr->enable)(clkptr, 0);
+	}
+
 	s3c_pwmclk_init();
 }

arch/arm/mach-s5p6442/include/mach/regs-clock.h

@@ -46,6 +46,7 @@
 #define S5P_CLK_DIV5		S5P_CLKREG(0x314)
 #define S5P_CLK_DIV6		S5P_CLKREG(0x318)
 
+#define S5P_CLKGATE_IP0		S5P_CLKREG(0x460)
 #define S5P_CLKGATE_IP3		S5P_CLKREG(0x46C)
 
 /* CLK_OUT */