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Defer all clock prepare and enable to csi2_start(), which previous only enable pix clock here. We can safely do that because there are not register access before csi2_start(). Signed-off-by: Frank Li --- drivers/staging/media/imx/imx6-mipi-csi2.c | 52 ++++++--------------------= ---- 1 file changed, 9 insertions(+), 43 deletions(-) diff --git a/drivers/staging/media/imx/imx6-mipi-csi2.c b/drivers/staging/m= edia/imx/imx6-mipi-csi2.c index eba9a650030f5e380aa900b94728ad375171c6a5..32ddcef7ec8535a44e121754bb6= 21c0d2e226369 100644 --- a/drivers/staging/media/imx/imx6-mipi-csi2.c +++ b/drivers/staging/media/imx/imx6-mipi-csi2.c @@ -39,11 +39,11 @@ struct csi2_dev { struct v4l2_subdev sd; struct v4l2_async_notifier notifier; struct media_pad pad[CSI2_NUM_PADS]; - struct clk *dphy_clk; - struct clk *pllref_clk; - struct clk *pix_clk; /* what is this? */ void __iomem *base; =20 + struct clk_bulk_data *clks; + int num_clks; + struct v4l2_subdev *remote; unsigned int remote_pad; unsigned short data_lanes; @@ -343,7 +343,7 @@ static int csi2_start(struct csi2_dev *csi2) unsigned int lanes; int ret; =20 - ret =3D clk_prepare_enable(csi2->pix_clk); + ret =3D clk_bulk_prepare_enable(csi2->num_clks, csi2->clks); if (ret) return ret; =20 @@ -390,7 +390,7 @@ static int csi2_start(struct csi2_dev *csi2) err_assert_reset: csi2_enable(csi2, false); err_disable_clk: - clk_disable_unprepare(csi2->pix_clk); + clk_bulk_disable_unprepare(csi2->num_clks, csi2->clks); return ret; } =20 @@ -401,7 +401,7 @@ static void csi2_stop(struct csi2_dev *csi2) v4l2_subdev_call(csi2->src_sd, video, post_streamoff); =20 csi2_enable(csi2, false); - clk_disable_unprepare(csi2->pix_clk); + clk_bulk_disable_unprepare(csi2->num_clks, csi2->clks); } =20 /* @@ -761,24 +761,6 @@ static int csi2_probe(struct platform_device *pdev) if (ret) return ret; =20 - csi2->pllref_clk =3D devm_clk_get(&pdev->dev, "ref"); - if (IS_ERR(csi2->pllref_clk)) { - v4l2_err(&csi2->sd, "failed to get pll reference clock\n"); - return PTR_ERR(csi2->pllref_clk); - } - - csi2->dphy_clk =3D devm_clk_get(&pdev->dev, "dphy"); - if (IS_ERR(csi2->dphy_clk)) { - v4l2_err(&csi2->sd, "failed to get dphy clock\n"); - return PTR_ERR(csi2->dphy_clk); - } - - csi2->pix_clk =3D devm_clk_get(&pdev->dev, "pix"); - if (IS_ERR(csi2->pix_clk)) { - v4l2_err(&csi2->sd, "failed to get pixel clock\n"); - return PTR_ERR(csi2->pix_clk); - } - res =3D platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { v4l2_err(&csi2->sd, "failed to get platform resources\n"); @@ -791,19 +773,9 @@ static int csi2_probe(struct platform_device *pdev) =20 mutex_init(&csi2->lock); =20 - ret =3D clk_prepare_enable(csi2->pllref_clk); - if (ret) { - v4l2_err(&csi2->sd, "failed to enable pllref_clk\n"); - goto rmmutex; - } - - ret =3D clk_prepare_enable(csi2->dphy_clk); - if (ret) { - v4l2_err(&csi2->sd, "failed to enable dphy_clk\n"); - goto pllref_off; - } - - platform_set_drvdata(pdev, &csi2->sd); + csi2->num_clks =3D devm_clk_bulk_get_all(&pdev->dev, &csi2->clks); + if (csi2->num_clks < 0) + return dev_err_probe(&pdev->dev, csi2->num_clks, "Failed to get clocks\n= "); =20 ret =3D csi2_async_register(csi2); if (ret) @@ -812,10 +784,6 @@ static int csi2_probe(struct platform_device *pdev) return 0; =20 clean_notifier: - clk_disable_unprepare(csi2->dphy_clk); -pllref_off: - clk_disable_unprepare(csi2->pllref_clk); -rmmutex: mutex_destroy(&csi2->lock); return ret; } @@ -826,8 +794,6 @@ static void csi2_remove(struct platform_device *pdev) struct csi2_dev *csi2 =3D sd_to_dev(sd); =20 v4l2_async_unregister_subdev(sd); - clk_disable_unprepare(csi2->dphy_clk); - clk_disable_unprepare(csi2->pllref_clk); mutex_destroy(&csi2->lock); media_entity_cleanup(&sd->entity); } --=20 2.34.1