diff options
| author | Martin Kaiser <martin@kaiser.cx> | 2023-07-19 09:18:04 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-07-28 18:20:25 +0800 |
| commit | 8bcd9689384810bd1c610419563c827e23118e34 (patch) | |
| tree | dce8e2230d7b4826dea7f1d515e2993c31d1ce20 /drivers/char | |
| parent | 80e40fea8e2a7528b079ac1853da528c5cabf625 (diff) | |
hwrng: cctrng - let devres enable the clock
Call devm_clk_get_optional_enabled in the cctrng driver. We don't have to
disable and unprepare the clock any more in error paths or in the remove
function.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/hw_random/cctrng.c | 29 |
1 files changed, 5 insertions, 24 deletions
diff --git a/drivers/char/hw_random/cctrng.c b/drivers/char/hw_random/cctrng.c index 241da7e44675..ac4a2fbc6a0f 100644 --- a/drivers/char/hw_random/cctrng.c +++ b/drivers/char/hw_random/cctrng.c @@ -460,30 +460,16 @@ static int cc_trng_clk_init(struct cctrng_drvdata *drvdata) { struct clk *clk; struct device *dev = &(drvdata->pdev->dev); - int rc = 0; - clk = devm_clk_get_optional(dev, NULL); + clk = devm_clk_get_optional_enabled(dev, NULL); if (IS_ERR(clk)) return dev_err_probe(dev, PTR_ERR(clk), - "Error getting clock\n"); + "Failed to get or enable the clock\n"); drvdata->clk = clk; - - rc = clk_prepare_enable(drvdata->clk); - if (rc) { - dev_err(dev, "Failed to enable clock\n"); - return rc; - } - return 0; } -static void cc_trng_clk_fini(struct cctrng_drvdata *drvdata) -{ - clk_disable_unprepare(drvdata->clk); -} - - static int cctrng_probe(struct platform_device *pdev) { struct cctrng_drvdata *drvdata; @@ -545,7 +531,7 @@ static int cctrng_probe(struct platform_device *pdev) rc = devm_request_irq(dev, irq, cc_isr, IRQF_SHARED, "cctrng", drvdata); if (rc) { dev_err(dev, "Could not register to interrupt %d\n", irq); - goto post_clk_err; + return rc; } dev_dbg(dev, "Registered to IRQ: %d\n", irq); @@ -563,14 +549,14 @@ static int cctrng_probe(struct platform_device *pdev) rc = cc_trng_pm_init(drvdata); if (rc) { dev_err(dev, "cc_trng_pm_init failed\n"); - goto post_clk_err; + return rc; } /* increment device's usage counter */ rc = cc_trng_pm_get(dev); if (rc) { dev_err(dev, "cc_trng_pm_get returned %x\n", rc); - goto post_pm_err; + return rc; } /* set pending_hw to verify that HW won't be triggered from read */ @@ -597,9 +583,6 @@ static int cctrng_probe(struct platform_device *pdev) post_pm_err: cc_trng_pm_fini(drvdata); -post_clk_err: - cc_trng_clk_fini(drvdata); - return rc; } @@ -612,8 +595,6 @@ static int cctrng_remove(struct platform_device *pdev) cc_trng_pm_fini(drvdata); - cc_trng_clk_fini(drvdata); - dev_info(dev, "ARM cctrng device terminated\n"); return 0; |