From: Martin Kaiser martin@kaiser.cx
[ Upstream commit 6a2bc448423cea44e7dba0f72d7c82ae04ab201e ]
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@kaiser.cx Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Stable-dep-of: 10a2199caf43 ("hwrng: imx-rngc - Moving IRQ handler registering after imx_rngc_irq_mask_clear()") Signed-off-by: Sasha Levin sashal@kernel.org --- 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 b05d676ca814..e32c52c10d4d 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; }