From: Martin Kaiser <martin@xxxxxxxxx>
[ 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@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Stable-dep-of: 10a2199caf43 ("hwrng: imx-rngc - Moving IRQ handler registering after imx_rngc_irq_mask_clear()")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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;
}
--
2.35.1
