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>

1 files changed, 82 insertions, 1 deletions

diff --git a/arch/arm/mach-exynos4/clock.c b/arch/arm/mach-exynos4/clock.c
index 15f13338f74c..871f9d508fde 100644
--- a/arch/arm/mach-exynos4/clock.c
+++ b/arch/arm/mach-exynos4/clock.c
@@ -23,6 +23,7 @@
 
 #include <mach/map.h>
 #include <mach/regs-clock.h>
+#include <mach/sysmmu.h>
 
 static struct clk clk_sclk_hdmi27m = {
         .name           = "sclk_hdmi27m",
@@ -81,11 +82,21 @@ static int exynos4_clksrc_mask_peril1_ctrl(struct clk *clk, int enable)
         return s5p_gatectrl(S5P_CLKSRC_MASK_PERIL1, clk, enable);
 }
 
+static int exynos4_clk_ip_mfc_ctrl(struct clk *clk, int enable)
+{
+        return s5p_gatectrl(S5P_CLKGATE_IP_MFC, clk, enable);
+}
+
 static int exynos4_clk_ip_cam_ctrl(struct clk *clk, int enable)
 {
         return s5p_gatectrl(S5P_CLKGATE_IP_CAM, clk, enable);
 }
 
+static int exynos4_clk_ip_tv_ctrl(struct clk *clk, int enable)
+{
+        return s5p_gatectrl(S5P_CLKGATE_IP_TV, clk, enable);
+}
+
 static int exynos4_clk_ip_image_ctrl(struct clk *clk, int enable)
 {
         return s5p_gatectrl(S5P_CLKGATE_IP_IMAGE, clk, enable);
@@ -602,7 +613,77 @@ static struct clk init_clocks_off[] = {
                 .parent         = &clk_aclk_100.clk,
                 .enable         = exynos4_clk_ip_peril_ctrl,
                 .ctrlbit        = (1 << 13),
-        },
+        }, {
+                .name           = "SYSMMU_MDMA",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_image_ctrl,
+                .ctrlbit        = (1 << 5),
+        }, {
+                .name           = "SYSMMU_FIMC0",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_cam_ctrl,
+                .ctrlbit        = (1 << 7),
+        }, {
+                .name           = "SYSMMU_FIMC1",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_cam_ctrl,
+                .ctrlbit        = (1 << 8),
+        }, {
+                .name           = "SYSMMU_FIMC2",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_cam_ctrl,
+                .ctrlbit        = (1 << 9),
+        }, {
+                .name           = "SYSMMU_FIMC3",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_cam_ctrl,
+                .ctrlbit        = (1 << 10),
+        }, {
+                .name           = "SYSMMU_JPEG",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_cam_ctrl,
+                .ctrlbit        = (1 << 11),
+        }, {
+                .name           = "SYSMMU_FIMD0",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_lcd0_ctrl,
+                .ctrlbit        = (1 << 4),
+        }, {
+                .name           = "SYSMMU_FIMD1",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_lcd1_ctrl,
+                .ctrlbit        = (1 << 4),
+        }, {
+                .name           = "SYSMMU_PCIe",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_fsys_ctrl,
+                .ctrlbit        = (1 << 18),
+        }, {
+                .name           = "SYSMMU_G2D",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_image_ctrl,
+                .ctrlbit        = (1 << 3),
+        }, {
+                .name           = "SYSMMU_ROTATOR",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_image_ctrl,
+                .ctrlbit        = (1 << 4),
+        }, {
+                .name           = "SYSMMU_TV",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_tv_ctrl,
+                .ctrlbit        = (1 << 4),
+        }, {
+                .name           = "SYSMMU_MFC_L",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_mfc_ctrl,
+                .ctrlbit        = (1 << 1),
+        }, {
+                .name           = "SYSMMU_MFC_R",
+                .id             = -1,
+                .enable         = exynos4_clk_ip_mfc_ctrl,
+                .ctrlbit        = (1 << 2),
+        }
 };
 
 static struct clk init_clocks[] = {