devm_clk_get_enabled() returns a clock prepared and enabled and already
registers a devm exit handler to disable (and unprepare) the clock.

Signed-off-by: Uwe Kleine-König <redacted>
---
  drivers/char/hw_random/meson-rng.c | 20 ++------------------
  1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/drivers/char/hw_random/meson-rng.c b/drivers/char/hw_random/meson-rng.c
index 8bb30282ca46..06db5a93e257 100644
--- a/drivers/char/hw_random/meson-rng.c
+++ b/drivers/char/hw_random/meson-rng.c

@@ -33,16 +33,10 @@ static int meson_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
  	return sizeof(u32);
  }
  
-static void meson_rng_clk_disable(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
  static int meson_rng_probe(struct platform_device *pdev)
  {
  	struct device *dev = &pdev->dev;
  	struct meson_rng_data *data;
-	int ret;
  
  	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
  	if (!data)

@@ -54,20 +48,10 @@ static int meson_rng_probe(struct platform_device *pdev)
  	if (IS_ERR(data->base))
  		return PTR_ERR(data->base);
  
-	data->core_clk = devm_clk_get_optional(dev, "core");
+	data->core_clk = devm_clk_get_optional_enabled(dev, "core");
  	if (IS_ERR(data->core_clk))
  		return dev_err_probe(dev, PTR_ERR(data->core_clk),
-				     "Failed to get core clock\n");
-
-	if (data->core_clk) {
-		ret = clk_prepare_enable(data->core_clk);
-		if (ret)
-			return ret;
-		ret = devm_add_action_or_reset(dev, meson_rng_clk_disable,
-					       data->core_clk);
-		if (ret)
-			return ret;
-	}
+				     "Failed to get enabled core clock\n");
  
  	data->rng.name = pdev->name;
  	data->rng.read = meson_rng_read;