1 files changed, 117 insertions, 0 deletions

diff --git a/drivers/media/video/s5p-mfc/s5p_mfc_pm.c b/drivers/media/video/s5p-mfc/s5p_mfc_pm.c
new file mode 100644
index 00000000000..f6a3035c4fb
--- /dev/null
+++ b/drivers/media/video/s5p-mfc/s5p_mfc_pm.c
@@ -0,0 +1,117 @@
+/*
+ * linux/drivers/media/video/s5p-mfc/s5p_mfc_pm.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#ifdef CONFIG_PM_RUNTIME
+#include <linux/pm_runtime.h>
+#endif
+#include "s5p_mfc_common.h"
+#include "s5p_mfc_debug.h"
+#include "s5p_mfc_pm.h"
+
+#define MFC_CLKNAME             "sclk_mfc"
+#define MFC_GATE_CLK_NAME       "mfc"
+
+#define CLK_DEBUG
+
+static struct s5p_mfc_pm *pm;
+static struct s5p_mfc_dev *p_dev;
+
+#ifdef CLK_DEBUG
+atomic_t clk_ref;
+#endif
+
+int s5p_mfc_init_pm(struct s5p_mfc_dev *dev)
+{
+        int ret = 0;
+
+        pm = &dev->pm;
+        p_dev = dev;
+        pm->clock_gate = clk_get(&dev->plat_dev->dev, MFC_GATE_CLK_NAME);
+        if (IS_ERR(pm->clock_gate)) {
+                mfc_err("Failed to get clock-gating control\n");
+                ret = -ENOENT;
+                goto err_g_ip_clk;
+        }
+        pm->clock = clk_get(&dev->plat_dev->dev, MFC_CLKNAME);
+        if (IS_ERR(pm->clock)) {
+                mfc_err("Failed to get MFC clock\n");
+                ret = -ENOENT;
+                goto err_g_ip_clk_2;
+        }
+        atomic_set(&pm->power, 0);
+#ifdef CONFIG_PM_RUNTIME
+        pm->device = &dev->plat_dev->dev;
+        pm_runtime_enable(pm->device);
+#endif
+#ifdef CLK_DEBUG
+        atomic_set(&clk_ref, 0);
+#endif
+        return 0;
+err_g_ip_clk_2:
+        clk_put(pm->clock_gate);
+err_g_ip_clk:
+        return ret;
+}
+
+void s5p_mfc_final_pm(struct s5p_mfc_dev *dev)
+{
+        clk_put(pm->clock_gate);
+        clk_put(pm->clock);
+#ifdef CONFIG_PM_RUNTIME
+        pm_runtime_disable(pm->device);
+#endif
+}
+
+int s5p_mfc_clock_on(void)
+{
+        int ret;
+#ifdef CLK_DEBUG
+        atomic_inc(&clk_ref);
+        mfc_debug(3, "+ %d", atomic_read(&clk_ref));
+#endif
+        ret = clk_enable(pm->clock_gate);
+        return ret;
+}
+
+void s5p_mfc_clock_off(void)
+{
+#ifdef CLK_DEBUG
+        atomic_dec(&clk_ref);
+        mfc_debug(3, "- %d", atomic_read(&clk_ref));
+#endif
+        clk_disable(pm->clock_gate);
+}
+
+int s5p_mfc_power_on(void)
+{
+#ifdef CONFIG_PM_RUNTIME
+        return pm_runtime_get_sync(pm->device);
+#else
+        atomic_set(&pm->power, 1);
+        return 0;
+#endif
+}
+
+int s5p_mfc_power_off(void)
+{
+#ifdef CONFIG_PM_RUNTIME
+        return pm_runtime_put_sync(pm->device);
+#else
+        atomic_set(&pm->power, 0);
+        return 0;
+#endif
+}
+
+