[PATCH] s5p-mfc: Added support for clk_prepare

[Kamil Debski]

Signed-off-by: Kamil Debski <k.deb...@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawro...@samsung.com>
---
 drivers/media/video/s5p-mfc/s5p_mfc_pm.c |   24 ++++++++++++++++++++++--
 1 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/media/video/s5p-mfc/s5p_mfc_pm.c 
b/drivers/media/video/s5p-mfc/s5p_mfc_pm.c
index f6a3035..738a607 100644
--- a/drivers/media/video/s5p-mfc/s5p_mfc_pm.c
+++ b/drivers/media/video/s5p-mfc/s5p_mfc_pm.c
@@ -41,15 +41,29 @@ int s5p_mfc_init_pm(struct s5p_mfc_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;
+               ret = PTR_ERR(pm->clock_gate);
                goto err_g_ip_clk;
        }
+
+       ret = clk_prepare(pm->clock_gate);
+       if (ret) {
+               mfc_err("Failed to prepare clock-gating control\n");
+               goto err_p_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;
+               ret = PTR_ERR(pm->clock);
                goto err_g_ip_clk_2;
        }
+
+       ret = clk_prepare(pm->clock);
+       if (ret) {
+               mfc_err("Failed to prepare MFC clock\n");
+               goto err_p_ip_clk_2;
+       }
+
        atomic_set(&pm->power, 0);
 #ifdef CONFIG_PM_RUNTIME
        pm->device = &dev->plat_dev->dev;
@@ -59,7 +73,11 @@ int s5p_mfc_init_pm(struct s5p_mfc_dev *dev)
        atomic_set(&clk_ref, 0);
 #endif
        return 0;
+err_p_ip_clk_2:
+       clk_put(pm->clock);
 err_g_ip_clk_2:
+       clk_unprepare(pm->clock_gate);
+err_p_ip_clk:
        clk_put(pm->clock_gate);
 err_g_ip_clk:
        return ret;
@@ -67,7 +85,9 @@ err_g_ip_clk:
 
 void s5p_mfc_final_pm(struct s5p_mfc_dev *dev)
 {
+       clk_unprepare(pm->clock_gate);
        clk_put(pm->clock_gate);
+       clk_unprepare(pm->clock);
        clk_put(pm->clock);
 #ifdef CONFIG_PM_RUNTIME
        pm_runtime_disable(pm->device);
-- 
1.7.0.4

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