Use the new devm_clk_get_enabled function to get our clock. We don't have to disable and unprepare the clock ourselves any more in error paths and in the remove function. Signed-off-by: Martin Kaiser <martin@xxxxxxxxx> --- drivers/char/hw_random/imx-rngc.c | 25 ++++++------------------- 1 file changed, 6 insertions(+), 19 deletions(-) diff --git a/drivers/char/hw_random/imx-rngc.c b/drivers/char/hw_random/imx-rngc.c index 4345df012d8f..23f490204341 100644 --- a/drivers/char/hw_random/imx-rngc.c +++ b/drivers/char/hw_random/imx-rngc.c @@ -245,7 +245,7 @@ static int imx_rngc_probe(struct platform_device *pdev) if (IS_ERR(rngc->base)) return PTR_ERR(rngc->base); - rngc->clk = devm_clk_get(&pdev->dev, NULL); + rngc->clk = devm_clk_get_enabled(&pdev->dev, NULL); if (IS_ERR(rngc->clk)) { dev_err(&pdev->dev, "Can not get rng_clk\n"); return PTR_ERR(rngc->clk); @@ -255,26 +255,20 @@ static int imx_rngc_probe(struct platform_device *pdev) if (irq < 0) return irq; - ret = clk_prepare_enable(rngc->clk); - if (ret) - return ret; - ver_id = readl(rngc->base + RNGC_VER_ID); rng_type = ver_id >> RNGC_TYPE_SHIFT; /* * This driver supports only RNGC and RNGB. (There's a different * driver for RNGA.) */ - if (rng_type != RNGC_TYPE_RNGC && rng_type != RNGC_TYPE_RNGB) { - ret = -ENODEV; - goto err; - } + if (rng_type != RNGC_TYPE_RNGC && rng_type != RNGC_TYPE_RNGB) + return -ENODEV; ret = devm_request_irq(&pdev->dev, irq, imx_rngc_irq, 0, pdev->name, (void *)rngc); if (ret) { dev_err(rngc->dev, "Can't get interrupt working.\n"); - goto err; + return ret; } init_completion(&rngc->rng_op_done); @@ -294,14 +288,14 @@ static int imx_rngc_probe(struct platform_device *pdev) ret = imx_rngc_self_test(rngc); if (ret) { dev_err(rngc->dev, "self test failed\n"); - goto err; + return ret; } } ret = hwrng_register(&rngc->rng); if (ret) { dev_err(&pdev->dev, "hwrng registration failed\n"); - goto err; + return ret; } dev_info(&pdev->dev, @@ -309,11 +303,6 @@ static int imx_rngc_probe(struct platform_device *pdev) rng_type == RNGC_TYPE_RNGB ? 'B' : 'C', (ver_id >> RNGC_VER_MAJ_SHIFT) & 0xff, ver_id & 0xff); return 0; - -err: - clk_disable_unprepare(rngc->clk); - - return ret; } static int __exit imx_rngc_remove(struct platform_device *pdev) @@ -322,8 +311,6 @@ static int __exit imx_rngc_remove(struct platform_device *pdev) hwrng_unregister(&rngc->rng); - clk_disable_unprepare(rngc->clk); - return 0; } -- 2.30.2