[media] video: mx2_camera: Use clk_prepare_enable/clk_disable_unprepare

Prepare the clock before enabling it.

Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: <linux-media@vger.kernel.org>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/mx2_camera.c

@@ -407,7 +407,7 @@ static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
 {
 	unsigned long flags;
 
-	clk_disable(pcdev->clk_csi);
+	clk_disable_unprepare(pcdev->clk_csi);
 	writel(0, pcdev->base_csi + CSICR1);
 	if (cpu_is_mx27()) {
 		writel(0, pcdev->base_emma + PRP_CNTL);
@@ -435,7 +435,7 @@ static int mx2_camera_add_device(struct soc_camera_device *icd)
 	if (pcdev->icd)
 		return -EBUSY;
 
-	ret = clk_enable(pcdev->clk_csi);
+	ret = clk_prepare_enable(pcdev->clk_csi);
 	if (ret < 0)
 		return ret;
 
@@ -1639,7 +1639,7 @@ static int __devinit mx27_camera_emma_init(struct mx2_camera_dev *pcdev)
 		goto exit_free_irq;
 	}
 
-	clk_enable(pcdev->clk_emma);
+	clk_prepare_enable(pcdev->clk_emma);
 
 	err = mx27_camera_emma_prp_reset(pcdev);
 	if (err)
@@ -1648,7 +1648,7 @@ static int __devinit mx27_camera_emma_init(struct mx2_camera_dev *pcdev)
 	return err;
 
 exit_clk_emma_put:
-	clk_disable(pcdev->clk_emma);
+	clk_disable_unprepare(pcdev->clk_emma);
 	clk_put(pcdev->clk_emma);
 exit_free_irq:
 	free_irq(pcdev->irq_emma, pcdev);
@@ -1785,7 +1785,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
 eallocctx:
 	if (cpu_is_mx27()) {
 		free_irq(pcdev->irq_emma, pcdev);
-		clk_disable(pcdev->clk_emma);
+		clk_disable_unprepare(pcdev->clk_emma);
 		clk_put(pcdev->clk_emma);
 		iounmap(pcdev->base_emma);
 		release_mem_region(pcdev->res_emma->start, resource_size(pcdev->res_emma));
@@ -1825,7 +1825,7 @@ static int __devexit mx2_camera_remove(struct platform_device *pdev)
 	iounmap(pcdev->base_csi);
 
 	if (cpu_is_mx27()) {
-		clk_disable(pcdev->clk_emma);
+		clk_disable_unprepare(pcdev->clk_emma);
 		clk_put(pcdev->clk_emma);
 		iounmap(pcdev->base_emma);
 		res = pcdev->res_emma;