[media] V4L: atmel-isi: add clk_prepare()/clk_unprepare() functions

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/atmel-isi.c b/drivers/media/video/atmel-isi.c
index 9fe4519176a4850ceecda1d29fb961eeb7b03fb2..ec3f6a06f9c3baf5f92e09abbb4e2bcef54196bd 100644 (file)
--- a/drivers/media/video/atmel-isi.c
+++ b/drivers/media/video/atmel-isi.c
@@ -922,7 +922,9 @@ static int __devexit atmel_isi_remove(struct platform_device *pdev)
                        isi->fb_descriptors_phys);
 
        iounmap(isi->regs);
+       clk_unprepare(isi->mck);
        clk_put(isi->mck);
+       clk_unprepare(isi->pclk);
        clk_put(isi->pclk);
        kfree(isi);
 
@@ -955,6 +957,10 @@ static int __devinit atmel_isi_probe(struct platform_device *pdev)
        if (IS_ERR(pclk))
                return PTR_ERR(pclk);
 
+       ret = clk_prepare(pclk);
+       if (ret)
+               goto err_clk_prepare_pclk;
+
        isi = kzalloc(sizeof(struct atmel_isi), GFP_KERNEL);
        if (!isi) {
                ret = -ENOMEM;
@@ -978,6 +984,10 @@ static int __devinit atmel_isi_probe(struct platform_device *pdev)
                goto err_clk_get;
        }
 
+       ret = clk_prepare(isi->mck);
+       if (ret)
+               goto err_clk_prepare_mck;
+
        /* Set ISI_MCK's frequency, it should be faster than pixel clock */
        ret = clk_set_rate(isi->mck, pdata->mck_hz);
        if (ret < 0)
@@ -1059,10 +1069,14 @@ err_alloc_ctx:
                        isi->fb_descriptors_phys);
 err_alloc_descriptors:
 err_set_mck_rate:
+       clk_unprepare(isi->mck);
+err_clk_prepare_mck:
        clk_put(isi->mck);
 err_clk_get:
        kfree(isi);
 err_alloc_isi:
+       clk_unprepare(pclk);
+err_clk_prepare_pclk:
        clk_put(pclk);
 
        return ret;