[PATCH 2/2] [media] V4L: atmel-isi: add clk_prepare()/clk_unprepare() functions

[Josh Wu]

Signed-off-by: Josh Wu <josh...@atmel.com>
---
 drivers/media/video/atmel-isi.c |   17 ++++++++++++++++-
 1 files changed, 16 insertions(+), 1 deletions(-)

diff --git a/drivers/media/video/atmel-isi.c b/drivers/media/video/atmel-isi.c
index ea4eef4..5da4381 100644
--- 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 +957,12 @@ static int __devinit atmel_isi_probe(struct 
platform_device *pdev)
        if (IS_ERR(pclk))
                return PTR_ERR(pclk);
 
+       ret = clk_prepare(pclk);
+       if (ret) {
+               clk_put(pclk);
+               return ret;
+       }
+
        isi = kzalloc(sizeof(struct atmel_isi), GFP_KERNEL);
        if (!isi) {
                ret = -ENOMEM;
@@ -978,10 +986,14 @@ static int __devinit atmel_isi_probe(struct 
platform_device *pdev)
                goto err_clk_get;
        }
 
+       ret = clk_prepare(isi->mck);
+       if (ret)
+               goto err_set_mck_rate;
+
        /* Set ISI_MCK's frequency, it should be faster than pixel clock */
        ret = clk_set_rate(isi->mck, pdata->mck_hz);
        if (ret < 0)
-               goto err_set_mck_rate;
+               goto err_unprepare_mck;
 
        isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
                                sizeof(struct fbd) * MAX_BUFFER_NUM,
@@ -1058,11 +1070,14 @@ err_alloc_ctx:
                        isi->p_fb_descriptors,
                        isi->fb_descriptors_phys);
 err_alloc_descriptors:
+err_unprepare_mck:
+       clk_unprepare(isi->mck);
 err_set_mck_rate:
        clk_put(isi->mck);
 err_clk_get:
        kfree(isi);
 err_alloc_isi:
+       clk_unprepare(pclk);
        clk_put(pclk);
 
        return ret;
-- 
1.6.3.3

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