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>

2 files changed, 29 insertions, 0 deletions

diff --git a/arch/arm/mach-s5p6442/clock.c b/arch/arm/mach-s5p6442/clock.c
index dcd20f17212..16d6e7e61b5 100644
--- a/arch/arm/mach-s5p6442/clock.c
+++ b/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();
 }
diff --git a/arch/arm/mach-s5p6442/include/mach/regs-clock.h b/arch/arm/mach-s5p6442/include/mach/regs-clock.h
index d8360b5d4ec..00828a33699 100644
--- a/arch/arm/mach-s5p6442/include/mach/regs-clock.h
+++ b/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 */