[media] s5p-mfc: Remove special clock usage in driver

MFC uses two clocks - MFC gate clock and special clock
which is named as "sclk_mfc" in exynos4 and "aclk_333" in
exynos5 SoC. The driver was doing just a clk_prepare on
this special clock without a clk_enable call. As this
sclk is the parent of gate clock, it gets prepared and
enabled along with the gate clock. So there is no need
for the driver to use this sclk. This patch removes the
sclk usage from driver.

Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/s5p-mfc/s5p_mfc.c

@@ -1362,7 +1362,6 @@ static struct s5p_mfc_variant mfc_drvdata_v5 = {
 	.port_num	= MFC_NUM_PORTS,
 	.buf_size	= &buf_size_v5,
 	.buf_align	= &mfc_buf_align_v5,
-	.mclk_name	= "sclk_mfc",
 	.fw_name	= "s5p-mfc.fw",
 };
 
@@ -1389,7 +1388,6 @@ static struct s5p_mfc_variant mfc_drvdata_v6 = {
 	.port_num	= MFC_NUM_PORTS_V6,
 	.buf_size	= &buf_size_v6,
 	.buf_align	= &mfc_buf_align_v6,
-	.mclk_name      = "aclk_333",
 	.fw_name        = "s5p-mfc-v6.fw",
 };
 

drivers/media/platform/s5p-mfc/s5p_mfc_common.h

@@ -232,7 +232,6 @@ struct s5p_mfc_variant {
 	unsigned int port_num;
 	struct s5p_mfc_buf_size *buf_size;
 	struct s5p_mfc_buf_align *buf_align;
-	char	*mclk_name;
 	char	*fw_name;
 };
 

drivers/media/platform/s5p-mfc/s5p_mfc_pm.c

@@ -50,19 +50,6 @@ int s5p_mfc_init_pm(struct s5p_mfc_dev *dev)
 		goto err_p_ip_clk;
 	}
 
-	pm->clock = clk_get(&dev->plat_dev->dev, dev->variant->mclk_name);
-	if (IS_ERR(pm->clock)) {
-		mfc_err("Failed to get MFC clock\n");
-		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;
@@ -72,10 +59,6 @@ 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:
@@ -86,8 +69,6 @@ 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);
 #endif