diff options
| -rw-r--r-- | drivers/char/hw_random/xgene-rng.c | 27 |
1 files changed, 6 insertions, 21 deletions
diff --git a/drivers/char/hw_random/xgene-rng.c b/drivers/char/hw_random/xgene-rng.c index a6a30686a58b..31662614a48f 100644 --- a/drivers/char/hw_random/xgene-rng.c +++ b/drivers/char/hw_random/xgene-rng.c @@ -84,7 +84,6 @@ struct xgene_rng_dev { unsigned long failure_ts;/* First failure timestamp */ struct timer_list failure_timer; struct device *dev; - struct clk *clk; }; static void xgene_rng_expired_timer(struct timer_list *t) @@ -314,6 +313,7 @@ static struct hwrng xgene_rng_func = { static int xgene_rng_probe(struct platform_device *pdev) { struct xgene_rng_dev *ctx; + struct clk *clk; int rc = 0; ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); @@ -341,45 +341,30 @@ static int xgene_rng_probe(struct platform_device *pdev) return dev_err_probe(&pdev->dev, rc, "Could not request RNG alarm IRQ\n"); /* Enable IP clock */ - ctx->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(ctx->clk)) { - dev_warn(&pdev->dev, "Couldn't get the clock for RNG\n"); - } else { - rc = clk_prepare_enable(ctx->clk); - if (rc) - return dev_err_probe(&pdev->dev, rc, - "clock prepare enable failed for RNG"); - } + clk = devm_clk_get_optional_enabled(&pdev->dev, NULL); + if (IS_ERR(clk)) + return dev_err_probe(&pdev->dev, PTR_ERR(clk), "Couldn't get the clock for RNG\n"); xgene_rng_func.priv = (unsigned long) ctx; rc = devm_hwrng_register(&pdev->dev, &xgene_rng_func); - if (rc) { - if (!IS_ERR(ctx->clk)) - clk_disable_unprepare(ctx->clk); + if (rc) return dev_err_probe(&pdev->dev, rc, "RNG registering failed\n"); - } rc = device_init_wakeup(&pdev->dev, 1); - if (rc) { - if (!IS_ERR(ctx->clk)) - clk_disable_unprepare(ctx->clk); + if (rc) return dev_err_probe(&pdev->dev, rc, "RNG device_init_wakeup failed\n"); - } return 0; } static int xgene_rng_remove(struct platform_device *pdev) { - struct xgene_rng_dev *ctx = platform_get_drvdata(pdev); int rc; rc = device_init_wakeup(&pdev->dev, 0); if (rc) dev_err(&pdev->dev, "RNG init wakeup failed error %d\n", rc); - if (!IS_ERR(ctx->clk)) - clk_disable_unprepare(ctx->clk); return rc; } |